diff options
34 files changed, 653 insertions, 7130 deletions
@@ -29,7 +29,6 @@ require ( github.com/KimMachineGun/automemlimit v0.6.1 github.com/buckket/go-blurhash v1.1.0 github.com/coreos/go-oidc/v3 v3.11.0 - github.com/disintegration/imaging v1.6.2 github.com/gin-contrib/cors v1.7.2 github.com/gin-contrib/gzip v1.0.1 github.com/gin-contrib/sessions v1.0.1 @@ -145,8 +145,6 @@ github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM= github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= -github.com/disintegration/imaging v1.6.2 h1:w1LecBlG2Lnp8B3jk5zSuNqd7b4DXhcjwek1ei82L+c= -github.com/disintegration/imaging v1.6.2/go.mod h1:44/5580QXChDfwIclfc/PCwrr44amcmDAg8hxG0Ewe4= github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4= github.com/docker/go-units v0.5.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk= github.com/dsoprea/go-exif/v2 v2.0.0-20200321225314-640175a69fe4/go.mod h1:Lm2lMM2zx8p4a34ZemkaUV95AnMl4ZvLbCUbwOvLC2E= @@ -692,7 +690,6 @@ golang.org/x/exp v0.0.0-20240222234643-814bf88cf225 h1:LfspQV/FYTatPTr/3HzIcmiUF golang.org/x/exp v0.0.0-20240222234643-814bf88cf225/go.mod h1:CxmFvTBINI24O/j8iY7H1xHzx2i4OsyguNBmN/uPtqc= golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js= golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0= -golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0= golang.org/x/image v0.19.0 h1:D9FX4QWkLfkeqaC62SonffIIuYdOk/UE2XKUBgRIBIQ= golang.org/x/image v0.19.0/go.mod h1:y0zrRqlQRWQ5PXaYCOMLTW2fpsxZ8Qh9I/ohnInJEys= golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE= diff --git a/internal/api/client/instance/instancepatch_test.go b/internal/api/client/instance/instancepatch_test.go index 6148ed93e..8b099984d 100644 --- a/internal/api/client/instance/instancepatch_test.go +++ b/internal/api/client/instance/instancepatch_test.go @@ -858,7 +858,7 @@ func (suite *InstancePatchTestSuite) TestInstancePatch8() { "static_url": "http://localhost:8080/fileserver/01AY6P665V14JJR0AFVRT7311Y/attachment/small/`+instanceAccount.AvatarMediaAttachment.ID+`.webp",`+` "thumbnail_static_type": "image/webp", "thumbnail_description": "A bouncing little green peglin.", - "blurhash": "LF9kG$RR4YtP%dR+V^t5D,oxx?WC" + "blurhash": "LE9801Rl4Yt5%dWCV]t5Dmoex?WC" }`, string(instanceV2ThumbnailJson)) // double extra special bonus: now update the image description without changing the image diff --git a/internal/api/client/media/mediacreate_test.go b/internal/api/client/media/mediacreate_test.go index e7f98d6d7..2eec8341f 100644 --- a/internal/api/client/media/mediacreate_test.go +++ b/internal/api/client/media/mediacreate_test.go @@ -206,7 +206,7 @@ func (suite *MediaCreateTestSuite) TestMediaCreateSuccessful() { Y: 0.5, }, }, *attachmentReply.Meta) - suite.Equal("LiBzRk#6V[WF_NvzV@WY_3rqV@a$", *attachmentReply.Blurhash) + suite.Equal("LiB|W-#6RQR.~qvzRjWF_3rqV@a$", *attachmentReply.Blurhash) suite.NotEmpty(attachmentReply.ID) suite.NotEmpty(attachmentReply.URL) suite.NotEmpty(attachmentReply.PreviewURL) @@ -291,7 +291,7 @@ func (suite *MediaCreateTestSuite) TestMediaCreateSuccessfulV2() { Y: 0.5, }, }, *attachmentReply.Meta) - suite.Equal("LiBzRk#6V[WF_NvzV@WY_3rqV@a$", *attachmentReply.Blurhash) + suite.Equal("LiB|W-#6RQR.~qvzRjWF_3rqV@a$", *attachmentReply.Blurhash) suite.NotEmpty(attachmentReply.ID) suite.Nil(attachmentReply.URL) suite.NotEmpty(attachmentReply.PreviewURL) diff --git a/internal/media/imaging.go b/internal/media/imaging.go new file mode 100644 index 000000000..a9f73a066 --- /dev/null +++ b/internal/media/imaging.go @@ -0,0 +1,623 @@ +// GoToSocial +// Copyright (C) GoToSocial Authors admin@gotosocial.org +// SPDX-License-Identifier: AGPL-3.0-or-later +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see <http://www.gnu.org/licenses/>. + +package media + +import ( + "image" + "image/color" + "math" +) + +// NOTE: +// the following code is borrowed from +// github.com/disintegration/imaging +// and collapses in some places for our +// particular usecases and with parallel() +// function (spans work across goroutines) +// removed, instead working synchronously. +// +// at gotosocial we take particular +// care about where we spawn goroutines +// to ensure we're in control of the +// amount of concurrency in relation +// to the amount configured by user. + +// resizeDownLinear resizes image to given width x height using linear resampling. +// This is specifically optimized for resizing down (i.e. smaller), else is noop. +func resizeDownLinear(img image.Image, width, height int) image.Image { + srcW, srcH := img.Bounds().Dx(), img.Bounds().Dy() + if srcW <= 0 || srcH <= 0 || + width < 0 || height < 0 { + return &image.NRGBA{} + } + + if width == 0 { + // If no width is given, use aspect preserving width. + tmp := float64(height) * float64(srcW) / float64(srcH) + width = int(math.Max(1.0, math.Floor(tmp+0.5))) + } + + if height == 0 { + // If no height is given, use aspect preserving height. + tmp := float64(width) * float64(srcH) / float64(srcW) + height = int(math.Max(1.0, math.Floor(tmp+0.5))) + } + + if width < srcW { + // Width is smaller, resize horizontally. + img = resizeHorizontalLinear(img, width) + } + + if height < srcH { + // Height is smaller, resize vertically. + img = resizeVerticalLinear(img, height) + } + + return img +} + +// flipH flips the image horizontally (left to right). +func flipH(img image.Image) image.Image { + src := newScanner(img) + dstW := src.w + dstH := src.h + rowSize := dstW * 4 + dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) + for y := 0; y < dstH; y++ { + i := y * dst.Stride + srcY := y + src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize]) + reverse(dst.Pix[i : i+rowSize]) + } + return dst +} + +// flipV flips the image vertically (from top to bottom). +func flipV(img image.Image) image.Image { + src := newScanner(img) + dstW := src.w + dstH := src.h + rowSize := dstW * 4 + dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) + for y := 0; y < dstH; y++ { + i := y * dst.Stride + srcY := dstH - y - 1 + src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize]) + } + return dst +} + +// rotate90 rotates the image 90 counter-clockwise. +func rotate90(img image.Image) image.Image { + src := newScanner(img) + dstW := src.h + dstH := src.w + rowSize := dstW * 4 + dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) + for y := 0; y < dstH; y++ { + i := y * dst.Stride + srcX := dstH - y - 1 + src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize]) + } + return dst +} + +// rotate180 rotates the image 180 counter-clockwise. +func rotate180(img image.Image) image.Image { + src := newScanner(img) + dstW := src.w + dstH := src.h + rowSize := dstW * 4 + dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) + for y := 0; y < dstH; y++ { + i := y * dst.Stride + srcY := dstH - y - 1 + src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize]) + reverse(dst.Pix[i : i+rowSize]) + } + return dst +} + +// rotate270 rotates the image 270 counter-clockwise. +func rotate270(img image.Image) image.Image { + src := newScanner(img) + dstW := src.h + dstH := src.w + rowSize := dstW * 4 + dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) + for y := 0; y < dstH; y++ { + i := y * dst.Stride + srcX := y + src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize]) + reverse(dst.Pix[i : i+rowSize]) + } + return dst +} + +// transpose flips the image horizontally and rotates 90 counter-clockwise. +func transpose(img image.Image) image.Image { + src := newScanner(img) + dstW := src.h + dstH := src.w + rowSize := dstW * 4 + dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) + for y := 0; y < dstH; y++ { + i := y * dst.Stride + srcX := y + src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize]) + } + return dst +} + +// transverse flips the image vertically and rotates 90 counter-clockwise. +func transverse(img image.Image) image.Image { + src := newScanner(img) + dstW := src.h + dstH := src.w + rowSize := dstW * 4 + dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) + for y := 0; y < dstH; y++ { + i := y * dst.Stride + srcX := dstH - y - 1 + src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize]) + reverse(dst.Pix[i : i+rowSize]) + } + return dst +} + +// resizeHorizontalLinear resizes image to given width using linear resampling. +func resizeHorizontalLinear(img image.Image, dstWidth int) image.Image { + src := newScanner(img) + dst := image.NewRGBA(image.Rect(0, 0, dstWidth, src.h)) + weights := precomputeWeightsLinear(dstWidth, src.w) + scanLine := make([]uint8, src.w*4) + for y := 0; y < src.h; y++ { + src.scan(0, y, src.w, y+1, scanLine) + j0 := y * dst.Stride + for x := range weights { + var r, g, b, a float64 + for _, w := range weights[x] { + i := w.index * 4 + s := scanLine[i : i+4 : i+4] + aw := float64(s[3]) * w.weight + r += float64(s[0]) * aw + g += float64(s[1]) * aw + b += float64(s[2]) * aw + a += aw + } + if a != 0 { + aInv := 1 / a + j := j0 + x*4 + d := dst.Pix[j : j+4 : j+4] + d[0] = clampFloat(r * aInv) + d[1] = clampFloat(g * aInv) + d[2] = clampFloat(b * aInv) + d[3] = clampFloat(a) + } + } + } + return dst +} + +// resizeVerticalLinear resizes image to given height using linear resampling. +func resizeVerticalLinear(img image.Image, height int) image.Image { + src := newScanner(img) + dst := image.NewNRGBA(image.Rect(0, 0, src.w, height)) + weights := precomputeWeightsLinear(height, src.h) + scanLine := make([]uint8, src.h*4) + for x := 0; x < src.w; x++ { + src.scan(x, 0, x+1, src.h, scanLine) + for y := range weights { + var r, g, b, a float64 + for _, w := range weights[y] { + i := w.index * 4 + s := scanLine[i : i+4 : i+4] + aw := float64(s[3]) * w.weight + r += float64(s[0]) * aw + g += float64(s[1]) * aw + b += float64(s[2]) * aw + a += aw + } + if a != 0 { + aInv := 1 / a + j := y*dst.Stride + x*4 + d := dst.Pix[j : j+4 : j+4] + d[0] = clampFloat(r * aInv) + d[1] = clampFloat(g * aInv) + d[2] = clampFloat(b * aInv) + d[3] = clampFloat(a) + } + } + } + return dst +} + +type indexWeight struct { + index int + weight float64 +} + +func precomputeWeightsLinear(dstSize, srcSize int) [][]indexWeight { + du := float64(srcSize) / float64(dstSize) + scale := du + if scale < 1.0 { + scale = 1.0 + } + + ru := math.Ceil(scale) + out := make([][]indexWeight, dstSize) + tmp := make([]indexWeight, 0, dstSize*int(ru+2)*2) + + for v := 0; v < dstSize; v++ { + fu := (float64(v)+0.5)*du - 0.5 + + begin := int(math.Ceil(fu - ru)) + if begin < 0 { + begin = 0 + } + end := int(math.Floor(fu + ru)) + if end > srcSize-1 { + end = srcSize - 1 + } + + var sum float64 + for u := begin; u <= end; u++ { + w := resampleLinear((float64(u) - fu) / scale) + if w != 0 { + sum += w + tmp = append(tmp, indexWeight{index: u, weight: w}) + } + } + if sum != 0 { + for i := range tmp { + tmp[i].weight /= sum + } + } + + out[v] = tmp + tmp = tmp[len(tmp):] + } + + return out +} + +// resampleLinear is the resample kernel func for linear filtering. +func resampleLinear(x float64) float64 { + x = math.Abs(x) + if x < 1.0 { + return 1.0 - x + } + return 0 +} + +// scanner wraps an image.Image for +// easier size access and image type +// agnostic access to data at coords. +type scanner struct { + image image.Image + w, h int + palette []color.NRGBA +} + +// newScanner wraps an image.Image in scanner{} type. +func newScanner(img image.Image) *scanner { + b := img.Bounds() + s := &scanner{ + image: img, + + w: b.Dx(), + h: b.Dy(), + } + if img, ok := img.(*image.Paletted); ok { + s.palette = make([]color.NRGBA, len(img.Palette)) + for i := 0; i < len(img.Palette); i++ { + s.palette[i] = color.NRGBAModel.Convert(img.Palette[i]).(color.NRGBA) + } + } + return s +} + +// scan scans the given rectangular region of the image into dst. +func (s *scanner) scan(x1, y1, x2, y2 int, dst []uint8) { + switch img := s.image.(type) { + case *image.NRGBA: + size := (x2 - x1) * 4 + j := 0 + i := y1*img.Stride + x1*4 + if size == 4 { + for y := y1; y < y2; y++ { + d := dst[j : j+4 : j+4] + s := img.Pix[i : i+4 : i+4] + d[0] = s[0] + d[1] = s[1] + d[2] = s[2] + d[3] = s[3] + j += size + i += img.Stride + } + } else { + for y := y1; y < y2; y++ { + copy(dst[j:j+size], img.Pix[i:i+size]) + j += size + i += img.Stride + } + } + + case *image.NRGBA64: + j := 0 + for y := y1; y < y2; y++ { + i := y*img.Stride + x1*8 + for x := x1; x < x2; x++ { + s := img.Pix[i : i+8 : i+8] + d := dst[j : j+4 : j+4] + d[0] = s[0] + d[1] = s[2] + d[2] = s[4] + d[3] = s[6] + j += 4 + i += 8 + } + } + + case *image.RGBA: + j := 0 + for y := y1; y < y2; y++ { + i := y*img.Stride + x1*4 + for x := x1; x < x2; x++ { + d := dst[j : j+4 : j+4] + a := img.Pix[i+3] + switch a { + case 0: + d[0] = 0 + d[1] = 0 + d[2] = 0 + d[3] = a + case 0xff: + s := img.Pix[i : i+4 : i+4] + d[0] = s[0] + d[1] = s[1] + d[2] = s[2] + d[3] = a + default: + s := img.Pix[i : i+4 : i+4] + r16 := uint16(s[0]) + g16 := uint16(s[1]) + b16 := uint16(s[2]) + a16 := uint16(a) + d[0] = uint8(r16 * 0xff / a16) + d[1] = uint8(g16 * 0xff / a16) + d[2] = uint8(b16 * 0xff / a16) + d[3] = a + } + j += 4 + i += 4 + } + } + + case *image.RGBA64: + j := 0 + for y := y1; y < y2; y++ { + i := y*img.Stride + x1*8 + for x := x1; x < x2; x++ { + s := img.Pix[i : i+8 : i+8] + d := dst[j : j+4 : j+4] + a := s[6] + switch a { + case 0: + d[0] = 0 + d[1] = 0 + d[2] = 0 + case 0xff: + d[0] = s[0] + d[1] = s[2] + d[2] = s[4] + default: + r32 := uint32(s[0])<<8 | uint32(s[1]) + g32 := uint32(s[2])<<8 | uint32(s[3]) + b32 := uint32(s[4])<<8 | uint32(s[5]) + a32 := uint32(s[6])<<8 | uint32(s[7]) + d[0] = uint8((r32 * 0xffff / a32) >> 8) + d[1] = uint8((g32 * 0xffff / a32) >> 8) + d[2] = uint8((b32 * 0xffff / a32) >> 8) + } + d[3] = a + j += 4 + i += 8 + } + } + + case *image.Gray: + j := 0 + for y := y1; y < y2; y++ { + i := y*img.Stride + x1 + for x := x1; x < x2; x++ { + c := img.Pix[i] + d := dst[j : j+4 : j+4] + d[0] = c + d[1] = c + d[2] = c + d[3] = 0xff + j += 4 + i++ + } + } + + case *image.Gray16: + j := 0 + for y := y1; y < y2; y++ { + i := y*img.Stride + x1*2 + for x := x1; x < x2; x++ { + c := img.Pix[i] + d := dst[j : j+4 : j+4] + d[0] = c + d[1] = c + d[2] = c + d[3] = 0xff + j += 4 + i += 2 + } + } + + case *image.YCbCr: + j := 0 + x1 += img.Rect.Min.X + x2 += img.Rect.Min.X + y1 += img.Rect.Min.Y + y2 += img.Rect.Min.Y + + hy := img.Rect.Min.Y / 2 + hx := img.Rect.Min.X / 2 + for y := y1; y < y2; y++ { + iy := (y-img.Rect.Min.Y)*img.YStride + (x1 - img.Rect.Min.X) + + var yBase int + switch img.SubsampleRatio { + case image.YCbCrSubsampleRatio444, image.YCbCrSubsampleRatio422: + yBase = (y - img.Rect.Min.Y) * img.CStride + case image.YCbCrSubsampleRatio420, image.YCbCrSubsampleRatio440: + yBase = (y/2 - hy) * img.CStride + } + + for x := x1; x < x2; x++ { + var ic int + switch img.SubsampleRatio { + case image.YCbCrSubsampleRatio444, image.YCbCrSubsampleRatio440: + ic = yBase + (x - img.Rect.Min.X) + case image.YCbCrSubsampleRatio422, image.YCbCrSubsampleRatio420: + ic = yBase + (x/2 - hx) + default: + ic = img.COffset(x, y) + } + + yy1 := int32(img.Y[iy]) * 0x10101 + cb1 := int32(img.Cb[ic]) - 128 + cr1 := int32(img.Cr[ic]) - 128 + + r := yy1 + 91881*cr1 + if uint32(r)&0xff000000 == 0 { + r >>= 16 + } else { + r = ^(r >> 31) + } + + g := yy1 - 22554*cb1 - 46802*cr1 + if uint32(g)&0xff000000 == 0 { + g >>= 16 + } else { + g = ^(g >> 31) + } + + b := yy1 + 116130*cb1 + if uint32(b)&0xff000000 == 0 { + b >>= 16 + } else { + b = ^(b >> 31) + } + + d := dst[j : j+4 : j+4] + d[0] = uint8(r) + d[1] = uint8(g) + d[2] = uint8(b) + d[3] = 0xff + + iy++ + j += 4 + } + } + + case *image.Paletted: + j := 0 + for y := y1; y < y2; y++ { + i := y*img.Stride + x1 + for x := x1; x < x2; x++ { + c := s.palette[img.Pix[i]] + d := dst[j : j+4 : j+4] + d[0] = c.R + d[1] = c.G + d[2] = c.B + d[3] = c.A + j += 4 + i++ + } + } + + default: + j := 0 + b := s.image.Bounds() + x1 += b.Min.X + x2 += b.Min.X + y1 += b.Min.Y + y2 += b.Min.Y + for y := y1; y < y2; y++ { + for x := x1; x < x2; x++ { + r16, g16, b16, a16 := s.image.At(x, y).RGBA() + d := dst[j : j+4 : j+4] + switch a16 { + case 0xffff: + d[0] = uint8(r16 >> 8) + d[1] = uint8(g16 >> 8) + d[2] = uint8(b16 >> 8) + d[3] = 0xff + case 0: + d[0] = 0 + d[1] = 0 + d[2] = 0 + d[3] = 0 + default: + d[0] = uint8(((r16 * 0xffff) / a16) >> 8) + d[1] = uint8(((g16 * 0xffff) / a16) >> 8) + d[2] = uint8(((b16 * 0xffff) / a16) >> 8) + d[3] = uint8(a16 >> 8) + } + j += 4 + } + } + } +} + +// reverse reverses the data +// in contained pixel slice. +func reverse(pix []uint8) { + if len(pix) <= 4 { + return + } + i := 0 + j := len(pix) - 4 + for i < j { + pi := pix[i : i+4 : i+4] + pj := pix[j : j+4 : j+4] + pi[0], pj[0] = pj[0], pi[0] + pi[1], pj[1] = pj[1], pi[1] + pi[2], pj[2] = pj[2], pi[2] + pi[3], pj[3] = pj[3], pi[3] + i += 4 + j -= 4 + } +} + +// clampFloat rounds and clamps float64 value to fit into uint8. +func clampFloat(x float64) uint8 { + v := int64(x + 0.5) + if v > 255 { + return 255 + } + if v > 0 { + return uint8(v) + } + return 0 +} diff --git a/internal/media/manager_test.go b/internal/media/manager_test.go index ff38176f1..29ed95ffa 100644 --- a/internal/media/manager_test.go +++ b/internal/media/manager_test.go @@ -276,7 +276,7 @@ func (suite *ManagerTestSuite) TestSimpleJpegProcess() { suite.Equal("image/jpeg", attachment.Thumbnail.ContentType) suite.Equal(269739, attachment.File.FileSize) suite.Equal(22858, attachment.Thumbnail.FileSize) - suite.Equal("LiBzRk#6V[WF_NvzV@WY_3rqV@a$", attachment.Blurhash) + suite.Equal("LiB|W-#6RQR.~qvzRjWF_3rqV@a$", attachment.Blurhash) // now make sure the attachment is in the database dbAttachment, err := suite.db.GetAttachmentByID(ctx, attachment.ID) @@ -429,7 +429,7 @@ func (suite *ManagerTestSuite) TestSlothVineProcess() { suite.Equal("image/webp", attachment.Thumbnail.ContentType) suite.Equal(312453, attachment.File.FileSize) suite.Equal(5648, attachment.Thumbnail.FileSize) - suite.Equal("LfIYH~xtNskCxtfPW.kB_4aespof", attachment.Blurhash) + suite.Equal("LgIYH}xtNsofxtfPW.j[_4axn+of", attachment.Blurhash) // now make sure the attachment is in the database dbAttachment, err := suite.db.GetAttachmentByID(ctx, attachment.ID) @@ -489,7 +489,7 @@ func (suite *ManagerTestSuite) TestLongerMp4Process() { suite.Equal("image/webp", attachment.Thumbnail.ContentType) suite.Equal(109569, attachment.File.FileSize) suite.Equal(2976, attachment.Thumbnail.FileSize) - suite.Equal("LJQJfm?bM{?b~qRjt7WBayWBofWB", attachment.Blurhash) + suite.Equal("LIQJfl_3IU?b~qM{ofayWBWVofRj", attachment.Blurhash) // now make sure the attachment is in the database dbAttachment, err := suite.db.GetAttachmentByID(ctx, attachment.ID) @@ -549,7 +549,7 @@ func (suite *ManagerTestSuite) TestBirdnestMp4Process() { suite.Equal("image/webp", attachment.Thumbnail.ContentType) suite.Equal(1409625, attachment.File.FileSize) suite.Equal(14478, attachment.Thumbnail.FileSize) - suite.Equal("LJF?FZV@RO.99DM_RPWAx]V?ayMw", attachment.Blurhash) + suite.Equal("LLF$qyaeRO.9DgM_RPaetkV@WCMw", attachment.Blurhash) // now make sure the attachment is in the database dbAttachment, err := suite.db.GetAttachmentByID(ctx, attachment.ID) @@ -657,7 +657,7 @@ func (suite *ManagerTestSuite) TestPngNoAlphaChannelProcess() { suite.Equal("image/jpeg", attachment.Thumbnail.ContentType) suite.Equal(17471, attachment.File.FileSize) suite.Equal(6446, attachment.Thumbnail.FileSize) - suite.Equal("LFQT7e.A%O%4?co$M}M{_1W9~TxV", attachment.Blurhash) + suite.Equal("LGP%YL.A-?tA.9o#RURQ~ojp^~xW", attachment.Blurhash) // now make sure the attachment is in the database dbAttachment, err := suite.db.GetAttachmentByID(ctx, attachment.ID) @@ -713,7 +713,7 @@ func (suite *ManagerTestSuite) TestPngAlphaChannelProcess() { suite.Equal("image/webp", attachment.Thumbnail.ContentType) suite.Equal(18832, attachment.File.FileSize) suite.Equal(3592, attachment.Thumbnail.FileSize) - suite.Equal("LCONII.A%Oxw?co#M}M{_1ac~TxV", attachment.Blurhash) + suite.Equal("LCN^lE.A-?xd?co#N1RQ~ojp~SxW", attachment.Blurhash) // now make sure the attachment is in the database dbAttachment, err := suite.db.GetAttachmentByID(ctx, attachment.ID) @@ -769,7 +769,7 @@ func (suite *ManagerTestSuite) TestSimpleJpegProcessWithCallback() { suite.Equal("image/jpeg", attachment.Thumbnail.ContentType) suite.Equal(269739, attachment.File.FileSize) suite.Equal(22858, attachment.Thumbnail.FileSize) - suite.Equal("LiBzRk#6V[WF_NvzV@WY_3rqV@a$", attachment.Blurhash) + suite.Equal("LiB|W-#6RQR.~qvzRjWF_3rqV@a$", attachment.Blurhash) // now make sure the attachment is in the database dbAttachment, err := suite.db.GetAttachmentByID(ctx, attachment.ID) @@ -847,7 +847,7 @@ func (suite *ManagerTestSuite) TestSimpleJpegProcessWithDiskStorage() { suite.Equal("image/jpeg", attachment.Thumbnail.ContentType) suite.Equal(269739, attachment.File.FileSize) suite.Equal(22858, attachment.Thumbnail.FileSize) - suite.Equal("LiBzRk#6V[WF_NvzV@WY_3rqV@a$", attachment.Blurhash) + suite.Equal("LiB|W-#6RQR.~qvzRjWF_3rqV@a$", attachment.Blurhash) // now make sure the attachment is in the database dbAttachment, err := suite.db.GetAttachmentByID(ctx, attachment.ID) diff --git a/internal/media/thumbnail.go b/internal/media/thumbnail.go index a562dc2ad..322af8d7e 100644 --- a/internal/media/thumbnail.go +++ b/internal/media/thumbnail.go @@ -28,7 +28,6 @@ import ( "strings" "github.com/buckket/go-blurhash" - "github.com/disintegration/imaging" "github.com/superseriousbusiness/gotosocial/internal/gtserror" "github.com/superseriousbusiness/gotosocial/internal/log" "golang.org/x/image/webp" @@ -248,32 +247,25 @@ func generateNativeThumb( // taking orientation into account. switch orientation { case orientationFlipH: - img = imaging.FlipH(img) + img = flipH(img) case orientationFlipV: - img = imaging.FlipV(img) + img = flipV(img) case orientationRotate90: - img = imaging.Rotate90(img) + img = rotate90(img) case orientationRotate180: - img = imaging.Rotate180(img) + img = rotate180(img) case orientationRotate270: - img = imaging.Rotate270(img) + img = rotate270(img) case orientationTranspose: - img = imaging.Transpose(img) + img = transpose(img) case orientationTransverse: - img = imaging.Transverse(img) + img = transverse(img) } - // Resize image to dimens only if necessary. - if img.Bounds().Dx() > maxThumbWidth || - img.Bounds().Dy() > maxThumbHeight { - // Note: We could call "imaging.Fit" here - // but there's no point, as we've already - // calculated target dimensions beforehand. - img = imaging.Resize(img, - width, height, - imaging.Linear, - ) - } + // Resize image to dimens. + img = resizeDownLinear(img, + width, height, + ) // Open output file at given path. outfile, err := os.Create(outpath) @@ -293,9 +285,10 @@ func generateNativeThumb( } if needBlurhash { - // for generating blurhashes, it's more cost effective to - // lose detail since it's blurry, so make a tiny version. - tiny := imaging.Resize(img, 32, 0, imaging.NearestNeighbor) + // for generating blurhashes, it's more + // cost effective to lose detail since + // it's blurry, so make a tiny version. + tiny := resizeDownLinear(img, 32, 0) // Drop the larger image // ref as soon as possible @@ -332,9 +325,10 @@ func generateWebpBlurhash(filepath string) (string, error) { return "", gtserror.Newf("error decoding file %s: %w", filepath, err) } - // for generating blurhashes, it's more cost effective to - // lose detail since it's blurry, so make a tiny version. - tiny := imaging.Resize(img, 32, 0, imaging.NearestNeighbor) + // for generating blurhashes, it's more + // cost effective to lose detail since + // it's blurry, so make a tiny version. + tiny := resizeDownLinear(img, 32, 0) // Drop the larger image // ref as soon as possible diff --git a/vendor/github.com/disintegration/imaging/.travis.yml b/vendor/github.com/disintegration/imaging/.travis.yml deleted file mode 100644 index 7ae5e4b25..000000000 --- a/vendor/github.com/disintegration/imaging/.travis.yml +++ /dev/null @@ -1,12 +0,0 @@ -language: go -go: - - "1.10.x" - - "1.11.x" - - "1.12.x" - -before_install: - - go get github.com/mattn/goveralls - -script: - - go test -v -race -cover - - $GOPATH/bin/goveralls -service=travis-ci diff --git a/vendor/github.com/disintegration/imaging/LICENSE b/vendor/github.com/disintegration/imaging/LICENSE deleted file mode 100644 index a4144a9d2..000000000 --- a/vendor/github.com/disintegration/imaging/LICENSE +++ /dev/null @@ -1,21 +0,0 @@ -The MIT License (MIT) - -Copyright (c) 2012 Grigory Dryapak - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. diff --git a/vendor/github.com/disintegration/imaging/README.md b/vendor/github.com/disintegration/imaging/README.md deleted file mode 100644 index a1fd764d2..000000000 --- a/vendor/github.com/disintegration/imaging/README.md +++ /dev/null @@ -1,226 +0,0 @@ -# Imaging
-
-[](https://godoc.org/github.com/disintegration/imaging)
-[](https://travis-ci.org/disintegration/imaging)
-[](https://coveralls.io/github/disintegration/imaging?branch=master)
-[](https://goreportcard.com/report/github.com/disintegration/imaging)
-
-Package imaging provides basic image processing functions (resize, rotate, crop, brightness/contrast adjustments, etc.).
-
-All the image processing functions provided by the package accept any image type that implements `image.Image` interface
-as an input, and return a new image of `*image.NRGBA` type (32bit RGBA colors, non-premultiplied alpha).
-
-## Installation
-
- go get -u github.com/disintegration/imaging
-
-## Documentation
-
-http://godoc.org/github.com/disintegration/imaging
-
-## Usage examples
-
-A few usage examples can be found below. See the documentation for the full list of supported functions.
-
-### Image resizing
-
-```go
-// Resize srcImage to size = 128x128px using the Lanczos filter.
-dstImage128 := imaging.Resize(srcImage, 128, 128, imaging.Lanczos)
-
-// Resize srcImage to width = 800px preserving the aspect ratio.
-dstImage800 := imaging.Resize(srcImage, 800, 0, imaging.Lanczos)
-
-// Scale down srcImage to fit the 800x600px bounding box.
-dstImageFit := imaging.Fit(srcImage, 800, 600, imaging.Lanczos)
-
-// Resize and crop the srcImage to fill the 100x100px area.
-dstImageFill := imaging.Fill(srcImage, 100, 100, imaging.Center, imaging.Lanczos)
-```
-
-Imaging supports image resizing using various resampling filters. The most notable ones:
-- `Lanczos` - A high-quality resampling filter for photographic images yielding sharp results.
-- `CatmullRom` - A sharp cubic filter that is faster than Lanczos filter while providing similar results.
-- `MitchellNetravali` - A cubic filter that produces smoother results with less ringing artifacts than CatmullRom.
-- `Linear` - Bilinear resampling filter, produces smooth output. Faster than cubic filters.
-- `Box` - Simple and fast averaging filter appropriate for downscaling. When upscaling it's similar to NearestNeighbor.
-- `NearestNeighbor` - Fastest resampling filter, no antialiasing.
-
-The full list of supported filters: NearestNeighbor, Box, Linear, Hermite, MitchellNetravali, CatmullRom, BSpline, Gaussian, Lanczos, Hann, Hamming, Blackman, Bartlett, Welch, Cosine. Custom filters can be created using ResampleFilter struct.
-
-**Resampling filters comparison**
-
-Original image:
-
-
-
-The same image resized from 600x400px to 150x100px using different resampling filters.
-From faster (lower quality) to slower (higher quality):
-
-Filter | Resize result
---------------------------|---------------------------------------------
-`imaging.NearestNeighbor` | 
-`imaging.Linear` | 
-`imaging.CatmullRom` | 
-`imaging.Lanczos` | 
-
-
-### Gaussian Blur
-
-```go
-dstImage := imaging.Blur(srcImage, 0.5)
-```
-
-Sigma parameter allows to control the strength of the blurring effect.
-
-Original image | Sigma = 0.5 | Sigma = 1.5
------------------------------------|----------------------------------------|---------------------------------------
- |  | 
-
-### Sharpening
-
-```go
-dstImage := imaging.Sharpen(srcImage, 0.5)
-```
-
-`Sharpen` uses gaussian function internally. Sigma parameter allows to control the strength of the sharpening effect.
-
-Original image | Sigma = 0.5 | Sigma = 1.5
------------------------------------|-------------------------------------------|------------------------------------------
- |  | 
-
-### Gamma correction
-
-```go
-dstImage := imaging.AdjustGamma(srcImage, 0.75)
-```
-
-Original image | Gamma = 0.75 | Gamma = 1.25
------------------------------------|------------------------------------------|-----------------------------------------
- |  | 
-
-### Contrast adjustment
-
-```go
-dstImage := imaging.AdjustContrast(srcImage, 20)
-```
-
-Original image | Contrast = 15 | Contrast = -15
------------------------------------|--------------------------------------------|-------------------------------------------
- |  | 
-
-### Brightness adjustment
-
-```go
-dstImage := imaging.AdjustBrightness(srcImage, 20)
-```
-
-Original image | Brightness = 10 | Brightness = -10
------------------------------------|----------------------------------------------|---------------------------------------------
- |  | 
-
-### Saturation adjustment
-
-```go
-dstImage := imaging.AdjustSaturation(srcImage, 20)
-```
-
-Original image | Saturation = 30 | Saturation = -30
------------------------------------|----------------------------------------------|---------------------------------------------
- |  | 
-
-## FAQ
-
-### Incorrect image orientation after processing (e.g. an image appears rotated after resizing)
-
-Most probably, the given image contains the EXIF orientation tag.
-The stadard `image/*` packages do not support loading and saving
-this kind of information. To fix the issue, try opening images with
-the `AutoOrientation` decode option. If this option is set to `true`,
-the image orientation is changed after decoding, according to the
-orientation tag (if present). Here's the example:
-
-```go
-img, err := imaging.Open("test.jpg", imaging.AutoOrientation(true))
-```
-
-### What's the difference between `imaging` and `gift` packages?
-
-[imaging](https://github.com/disintegration/imaging)
-is designed to be a lightweight and simple image manipulation package.
-It provides basic image processing functions and a few helper functions
-such as `Open` and `Save`. It consistently returns *image.NRGBA image
-type (8 bits per channel, RGBA).
-
-[gift](https://github.com/disintegration/gift)
-supports more advanced image processing, for example, sRGB/Linear color
-space conversions. It also supports different output image types
-(e.g. 16 bits per channel) and provides easy-to-use API for chaining
-multiple processing steps together.
-
-## Example code
-
-```go
-package main
-
-import (
- "image"
- "image/color"
- "log"
-
- "github.com/disintegration/imaging"
-)
-
-func main() {
- // Open a test image.
- src, err := imaging.Open("testdata/flowers.png")
- if err != nil {
- log.Fatalf("failed to open image: %v", err)
- }
-
- // Crop the original image to 300x300px size using the center anchor.
- src = imaging.CropAnchor(src, 300, 300, imaging.Center)
-
- // Resize the cropped image to width = 200px preserving the aspect ratio.
- src = imaging.Resize(src, 200, 0, imaging.Lanczos)
-
- // Create a blurred version of the image.
- img1 := imaging.Blur(src, 5)
-
- // Create a grayscale version of the image with higher contrast and sharpness.
- img2 := imaging.Grayscale(src)
- img2 = imaging.AdjustContrast(img2, 20)
- img2 = imaging.Sharpen(img2, 2)
-
- // Create an inverted version of the image.
- img3 := imaging.Invert(src)
-
- // Create an embossed version of the image using a convolution filter.
- img4 := imaging.Convolve3x3(
- src,
- [9]float64{
- -1, -1, 0,
- -1, 1, 1,
- 0, 1, 1,
- },
- nil,
- )
-
- // Create a new image and paste the four produced images into it.
- dst := imaging.New(400, 400, color.NRGBA{0, 0, 0, 0})
- dst = imaging.Paste(dst, img1, image.Pt(0, 0))
- dst = imaging.Paste(dst, img2, image.Pt(0, 200))
- dst = imaging.Paste(dst, img3, image.Pt(200, 0))
- dst = imaging.Paste(dst, img4, image.Pt(200, 200))
-
- // Save the resulting image as JPEG.
- err = imaging.Save(dst, "testdata/out_example.jpg")
- if err != nil {
- log.Fatalf("failed to save image: %v", err)
- }
-}
-```
-
-Output:
-
-
diff --git a/vendor/github.com/disintegration/imaging/adjust.go b/vendor/github.com/disintegration/imaging/adjust.go deleted file mode 100644 index daaf1de86..000000000 --- a/vendor/github.com/disintegration/imaging/adjust.go +++ /dev/null @@ -1,253 +0,0 @@ -package imaging - -import ( - "image" - "image/color" - "math" -) - -// Grayscale produces a grayscale version of the image. -func Grayscale(img image.Image) *image.NRGBA { - src := newScanner(img) - dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h)) - parallel(0, src.h, func(ys <-chan int) { - for y := range ys { - i := y * dst.Stride - src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4]) - for x := 0; x < src.w; x++ { - d := dst.Pix[i : i+3 : i+3] - r := d[0] - g := d[1] - b := d[2] - f := 0.299*float64(r) + 0.587*float64(g) + 0.114*float64(b) - y := uint8(f + 0.5) - d[0] = y - d[1] = y - d[2] = y - i += 4 - } - } - }) - return dst -} - -// Invert produces an inverted (negated) version of the image. -func Invert(img image.Image) *image.NRGBA { - src := newScanner(img) - dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h)) - parallel(0, src.h, func(ys <-chan int) { - for y := range ys { - i := y * dst.Stride - src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4]) - for x := 0; x < src.w; x++ { - d := dst.Pix[i : i+3 : i+3] - d[0] = 255 - d[0] - d[1] = 255 - d[1] - d[2] = 255 - d[2] - i += 4 - } - } - }) - return dst -} - -// AdjustSaturation changes the saturation of the image using the percentage parameter and returns the adjusted image. -// The percentage must be in the range (-100, 100). -// The percentage = 0 gives the original image. -// The percentage = 100 gives the image with the saturation value doubled for each pixel. -// The percentage = -100 gives the image with the saturation value zeroed for each pixel (grayscale). -// -// Examples: -// dstImage = imaging.AdjustSaturation(srcImage, 25) // Increase image saturation by 25%. -// dstImage = imaging.AdjustSaturation(srcImage, -10) // Decrease image saturation by 10%. -// -func AdjustSaturation(img image.Image, percentage float64) *image.NRGBA { - percentage = math.Min(math.Max(percentage, -100), 100) - multiplier := 1 + percentage/100 - - return AdjustFunc(img, func(c color.NRGBA) color.NRGBA { - h, s, l := rgbToHSL(c.R, c.G, c.B) - s *= multiplier - if s > 1 { - s = 1 - } - r, g, b := hslToRGB(h, s, l) - return color.NRGBA{r, g, b, c.A} - }) -} - -// AdjustContrast changes the contrast of the image using the percentage parameter and returns the adjusted image. -// The percentage must be in range (-100, 100). The percentage = 0 gives the original image. -// The percentage = -100 gives solid gray image. -// -// Examples: -// -// dstImage = imaging.AdjustContrast(srcImage, -10) // Decrease image contrast by 10%. -// dstImage = imaging.AdjustContrast(srcImage, 20) // Increase image contrast by 20%. -// -func AdjustContrast(img image.Image, percentage float64) *image.NRGBA { - percentage = math.Min(math.Max(percentage, -100.0), 100.0) - lut := make([]uint8, 256) - - v := (100.0 + percentage) / 100.0 - for i := 0; i < 256; i++ { - switch { - case 0 <= v && v <= 1: - lut[i] = clamp((0.5 + (float64(i)/255.0-0.5)*v) * 255.0) - case 1 < v && v < 2: - lut[i] = clamp((0.5 + (float64(i)/255.0-0.5)*(1/(2.0-v))) * 255.0) - default: - lut[i] = uint8(float64(i)/255.0+0.5) * 255 - } - } - - return adjustLUT(img, lut) -} - -// AdjustBrightness changes the brightness of the image using the percentage parameter and returns the adjusted image. -// The percentage must be in range (-100, 100). The percentage = 0 gives the original image. -// The percentage = -100 gives solid black image. The percentage = 100 gives solid white image. -// -// Examples: -// -// dstImage = imaging.AdjustBrightness(srcImage, -15) // Decrease image brightness by 15%. -// dstImage = imaging.AdjustBrightness(srcImage, 10) // Increase image brightness by 10%. -// -func AdjustBrightness(img image.Image, percentage float64) *image.NRGBA { - percentage = math.Min(math.Max(percentage, -100.0), 100.0) - lut := make([]uint8, 256) - - shift := 255.0 * percentage / 100.0 - for i := 0; i < 256; i++ { - lut[i] = clamp(float64(i) + shift) - } - - return adjustLUT(img, lut) -} - -// AdjustGamma performs a gamma correction on the image and returns the adjusted image. -// Gamma parameter must be positive. Gamma = 1.0 gives the original image. -// Gamma less than 1.0 darkens the image and gamma greater than 1.0 lightens it. -// -// Example: -// -// dstImage = imaging.AdjustGamma(srcImage, 0.7) -// -func AdjustGamma(img image.Image, gamma float64) *image.NRGBA { - e := 1.0 / math.Max(gamma, 0.0001) - lut := make([]uint8, 256) - - for i := 0; i < 256; i++ { - lut[i] = clamp(math.Pow(float64(i)/255.0, e) * 255.0) - } - - return adjustLUT(img, lut) -} - -// AdjustSigmoid changes the contrast of the image using a sigmoidal function and returns the adjusted image. -// It's a non-linear contrast change useful for photo adjustments as it preserves highlight and shadow detail. -// The midpoint parameter is the midpoint of contrast that must be between 0 and 1, typically 0.5. -// The factor parameter indicates how much to increase or decrease the contrast, typically in range (-10, 10). -// If the factor parameter is positive the image contrast is increased otherwise the contrast is decreased. -// -// Examples: -// -// dstImage = imaging.AdjustSigmoid(srcImage, 0.5, 3.0) // Increase the contrast. -// dstImage = imaging.AdjustSigmoid(srcImage, 0.5, -3.0) // Decrease the contrast. -// -func AdjustSigmoid(img image.Image, midpoint, factor float64) *image.NRGBA { - if factor == 0 { - return Clone(img) - } - - lut := make([]uint8, 256) - a := math.Min(math.Max(midpoint, 0.0), 1.0) - b := math.Abs(factor) - sig0 := sigmoid(a, b, 0) - sig1 := sigmoid(a, b, 1) - e := 1.0e-6 - - if factor > 0 { - for i := 0; i < 256; i++ { - x := float64(i) / 255.0 - sigX := sigmoid(a, b, x) - f := (sigX - sig0) / (sig1 - sig0) - lut[i] = clamp(f * 255.0) - } - } else { - for i := 0; i < 256; i++ { - x := float64(i) / 255.0 - arg := math.Min(math.Max((sig1-sig0)*x+sig0, e), 1.0-e) - f := a - math.Log(1.0/arg-1.0)/b - lut[i] = clamp(f * 255.0) - } - } - - return adjustLUT(img, lut) -} - -func sigmoid(a, b, x float64) float64 { - return 1 / (1 + math.Exp(b*(a-x))) -} - -// adjustLUT applies the given lookup table to the colors of the image. -func adjustLUT(img image.Image, lut []uint8) *image.NRGBA { - src := newScanner(img) - dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h)) - lut = lut[0:256] - parallel(0, src.h, func(ys <-chan int) { - for y := range ys { - i := y * dst.Stride - src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4]) - for x := 0; x < src.w; x++ { - d := dst.Pix[i : i+3 : i+3] - d[0] = lut[d[0]] - d[1] = lut[d[1]] - d[2] = lut[d[2]] - i += 4 - } - } - }) - return dst -} - -// AdjustFunc applies the fn function to each pixel of the img image and returns the adjusted image. -// -// Example: -// -// dstImage = imaging.AdjustFunc( -// srcImage, -// func(c color.NRGBA) color.NRGBA { -// // Shift the red channel by 16. -// r := int(c.R) + 16 -// if r > 255 { -// r = 255 -// } -// return color.NRGBA{uint8(r), c.G, c.B, c.A} -// } -// ) -// -func AdjustFunc(img image.Image, fn func(c color.NRGBA) color.NRGBA) *image.NRGBA { - src := newScanner(img) - dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h)) - parallel(0, src.h, func(ys <-chan int) { - for y := range ys { - i := y * dst.Stride - src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4]) - for x := 0; x < src.w; x++ { - d := dst.Pix[i : i+4 : i+4] - r := d[0] - g := d[1] - b := d[2] - a := d[3] - c := fn(color.NRGBA{r, g, b, a}) - d[0] = c.R - d[1] = c.G - d[2] = c.B - d[3] = c.A - i += 4 - } - } - }) - return dst -} diff --git a/vendor/github.com/disintegration/imaging/convolution.go b/vendor/github.com/disintegration/imaging/convolution.go deleted file mode 100644 index 11eddc162..000000000 --- a/vendor/github.com/disintegration/imaging/convolution.go +++ /dev/null @@ -1,148 +0,0 @@ -package imaging - -import ( - "image" -) - -// ConvolveOptions are convolution parameters. -type ConvolveOptions struct { - // If Normalize is true the kernel is normalized before convolution. - Normalize bool - - // If Abs is true the absolute value of each color channel is taken after convolution. - Abs bool - - // Bias is added to each color channel value after convolution. - Bias int -} - -// Convolve3x3 convolves the image with the specified 3x3 convolution kernel. -// Default parameters are used if a nil *ConvolveOptions is passed. -func Convolve3x3(img image.Image, kernel [9]float64, options *ConvolveOptions) *image.NRGBA { - return convolve(img, kernel[:], options) -} - -// Convolve5x5 convolves the image with the specified 5x5 convolution kernel. -// Default parameters are used if a nil *ConvolveOptions is passed. -func Convolve5x5(img image.Image, kernel [25]float64, options *ConvolveOptions) *image.NRGBA { - return convolve(img, kernel[:], options) -} - -func convolve(img image.Image, kernel []float64, options *ConvolveOptions) *image.NRGBA { - src := toNRGBA(img) - w := src.Bounds().Max.X - h := src.Bounds().Max.Y - dst := image.NewNRGBA(image.Rect(0, 0, w, h)) - - if w < 1 || h < 1 { - return dst - } - - if options == nil { - options = &ConvolveOptions{} - } - - if options.Normalize { - normalizeKernel(kernel) - } - - type coef struct { - x, y int - k float64 - } - var coefs []coef - var m int - - switch len(kernel) { - case 9: - m = 1 - case 25: - m = 2 - } - - i := 0 - for y := -m; y <= m; y++ { - for x := -m; x <= m; x++ { - if kernel[i] != 0 { - coefs = append(coefs, coef{x: x, y: y, k: kernel[i]}) - } - i++ - } - } - - parallel(0, h, func(ys <-chan int) { - for y := range ys { - for x := 0; x < w; x++ { - var r, g, b float64 - for _, c := range coefs { - ix := x + c.x - if ix < 0 { - ix = 0 - } else if ix >= w { - ix = w - 1 - } - - iy := y + c.y - if iy < 0 { - iy = 0 - } else if iy >= h { - iy = h - 1 - } - - off := iy*src.Stride + ix*4 - s := src.Pix[off : off+3 : off+3] - r += float64(s[0]) * c.k - g += float64(s[1]) * c.k - b += float64(s[2]) * c.k - } - - if options.Abs { - if r < 0 { - r = -r - } - if g < 0 { - g = -g - } - if b < 0 { - b = -b - } - } - - if options.Bias != 0 { - r += float64(options.Bias) - g += float64(options.Bias) - b += float64(options.Bias) - } - - srcOff := y*src.Stride + x*4 - dstOff := y*dst.Stride + x*4 - d := dst.Pix[dstOff : dstOff+4 : dstOff+4] - d[0] = clamp(r) - d[1] = clamp(g) - d[2] = clamp(b) - d[3] = src.Pix[srcOff+3] - } - } - }) - - return dst -} - -func normalizeKernel(kernel []float64) { - var sum, sumpos float64 - for i := range kernel { - sum += kernel[i] - if kernel[i] > 0 { - sumpos += kernel[i] - } - } - if sum != 0 { - for i := range kernel { - kernel[i] /= sum - } - } else if sumpos != 0 { - for i := range kernel { - kernel[i] /= sumpos - } - } -} diff --git a/vendor/github.com/disintegration/imaging/doc.go b/vendor/github.com/disintegration/imaging/doc.go deleted file mode 100644 index c98c91250..000000000 --- a/vendor/github.com/disintegration/imaging/doc.go +++ /dev/null @@ -1,7 +0,0 @@ -/* -Package imaging provides basic image processing functions (resize, rotate, crop, brightness/contrast adjustments, etc.). - -All the image processing functions provided by the package accept any image type that implements image.Image interface -as an input, and return a new image of *image.NRGBA type (32bit RGBA colors, non-premultiplied alpha). -*/ -package imaging diff --git a/vendor/github.com/disintegration/imaging/effects.go b/vendor/github.com/disintegration/imaging/effects.go deleted file mode 100644 index 47316b701..000000000 --- a/vendor/github.com/disintegration/imaging/effects.go +++ /dev/null @@ -1,169 +0,0 @@ -package imaging - -import ( - "image" - "math" -) - -func gaussianBlurKernel(x, sigma float64) float64 { - return math.Exp(-(x*x)/(2*sigma*sigma)) / (sigma * math.Sqrt(2*math.Pi)) -} - -// Blur produces a blurred version of the image using a Gaussian function. -// Sigma parameter must be positive and indicates how much the image will be blurred. -// -// Example: -// -// dstImage := imaging.Blur(srcImage, 3.5) -// -func Blur(img image.Image, sigma float64) *image.NRGBA { - if sigma <= 0 { - return Clone(img) - } - - radius := int(math.Ceil(sigma * 3.0)) - kernel := make([]float64, radius+1) - - for i := 0; i <= radius; i++ { - kernel[i] = gaussianBlurKernel(float64(i), sigma) - } - - return blurVertical(blurHorizontal(img, kernel), kernel) -} - -func blurHorizontal(img image.Image, kernel []float64) *image.NRGBA { - src := newScanner(img) - dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h)) - radius := len(kernel) - 1 - - parallel(0, src.h, func(ys <-chan int) { - scanLine := make([]uint8, src.w*4) - scanLineF := make([]float64, len(scanLine)) - for y := range ys { - src.scan(0, y, src.w, y+1, scanLine) - for i, v := range scanLine { - scanLineF[i] = float64(v) - } - for x := 0; x < src.w; x++ { - min := x - radius - if min < 0 { - min = 0 - } - max := x + radius - if max > src.w-1 { - max = src.w - 1 - } - var r, g, b, a, wsum float64 - for ix := min; ix <= max; ix++ { - i := ix * 4 - weight := kernel[absint(x-ix)] - wsum += weight - s := scanLineF[i : i+4 : i+4] - wa := s[3] * weight - r += s[0] * wa - g += s[1] * wa - b += s[2] * wa - a += wa - } - if a != 0 { - aInv := 1 / a - j := y*dst.Stride + x*4 - d := dst.Pix[j : j+4 : j+4] - d[0] = clamp(r * aInv) - d[1] = clamp(g * aInv) - d[2] = clamp(b * aInv) - d[3] = clamp(a / wsum) - } - } - } - }) - - return dst -} - -func blurVertical(img image.Image, kernel []float64) *image.NRGBA { - src := newScanner(img) - dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h)) - radius := len(kernel) - 1 - - parallel(0, src.w, func(xs <-chan int) { - scanLine := make([]uint8, src.h*4) - scanLineF := make([]float64, len(scanLine)) - for x := range xs { - src.scan(x, 0, x+1, src.h, scanLine) - for i, v := range scanLine { - scanLineF[i] = float64(v) - } - for y := 0; y < src.h; y++ { - min := y - radius - if min < 0 { - min = 0 - } - max := y + radius - if max > src.h-1 { - max = src.h - 1 - } - var r, g, b, a, wsum float64 - for iy := min; iy <= max; iy++ { - i := iy * 4 - weight := kernel[absint(y-iy)] - wsum += weight - s := scanLineF[i : i+4 : i+4] - wa := s[3] * weight - r += s[0] * wa - g += s[1] * wa - b += s[2] * wa - a += wa - } - if a != 0 { - aInv := 1 / a - j := y*dst.Stride + x*4 - d := dst.Pix[j : j+4 : j+4] - d[0] = clamp(r * aInv) - d[1] = clamp(g * aInv) - d[2] = clamp(b * aInv) - d[3] = clamp(a / wsum) - } - } - } - }) - - return dst -} - -// Sharpen produces a sharpened version of the image. -// Sigma parameter must be positive and indicates how much the image will be sharpened. -// -// Example: -// -// dstImage := imaging.Sharpen(srcImage, 3.5) -// -func Sharpen(img image.Image, sigma float64) *image.NRGBA { - if sigma <= 0 { - return Clone(img) - } - - src := newScanner(img) - dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h)) - blurred := Blur(img, sigma) - - parallel(0, src.h, func(ys <-chan int) { - scanLine := make([]uint8, src.w*4) - for y := range ys { - src.scan(0, y, src.w, y+1, scanLine) - j := y * dst.Stride - for i := 0; i < src.w*4; i++ { - val := int(scanLine[i])<<1 - int(blurred.Pix[j]) - if val < 0 { - val = 0 - } else if val > 0xff { - val = 0xff - } - dst.Pix[j] = uint8(val) - j++ - } - } - }) - - return dst -} diff --git a/vendor/github.com/disintegration/imaging/histogram.go b/vendor/github.com/disintegration/imaging/histogram.go deleted file mode 100644 index c547fe822..000000000 --- a/vendor/github.com/disintegration/imaging/histogram.go +++ /dev/null @@ -1,52 +0,0 @@ -package imaging - -import ( - "image" - "sync" -) - -// Histogram returns a normalized histogram of an image. -// -// Resulting histogram is represented as an array of 256 floats, where -// histogram[i] is a probability of a pixel being of a particular luminance i. -func Histogram(img image.Image) [256]float64 { - var mu sync.Mutex - var histogram [256]float64 - var total float64 - - src := newScanner(img) - if src.w == 0 || src.h == 0 { - return histogram - } - - parallel(0, src.h, func(ys <-chan int) { - var tmpHistogram [256]float64 - var tmpTotal float64 - scanLine := make([]uint8, src.w*4) - for y := range ys { - src.scan(0, y, src.w, y+1, scanLine) - i := 0 - for x := 0; x < src.w; x++ { - s := scanLine[i : i+3 : i+3] - r := s[0] - g := s[1] - b := s[2] - y := 0.299*float32(r) + 0.587*float32(g) + 0.114*float32(b) - tmpHistogram[int(y+0.5)]++ - tmpTotal++ - i += 4 - } - } - mu.Lock() - for i := 0; i < 256; i++ { - histogram[i] += tmpHistogram[i] - } - total += tmpTotal - mu.Unlock() - }) - - for i := 0; i < 256; i++ { - histogram[i] = histogram[i] / total - } - return histogram -} diff --git a/vendor/github.com/disintegration/imaging/io.go b/vendor/github.com/disintegration/imaging/io.go deleted file mode 100644 index f6c6da86b..000000000 --- a/vendor/github.com/disintegration/imaging/io.go +++ /dev/null @@ -1,444 +0,0 @@ -package imaging - -import ( - "encoding/binary" - "errors" - "image" - "image/draw" - "image/gif" - "image/jpeg" - "image/png" - "io" - "io/ioutil" - "os" - "path/filepath" - "strings" - - "golang.org/x/image/bmp" - "golang.org/x/image/tiff" -) - -type fileSystem interface { - Create(string) (io.WriteCloser, error) - Open(string) (io.ReadCloser, error) -} - -type localFS struct{} - -func (localFS) Create(name string) (io.WriteCloser, error) { return os.Create(name) } -func (localFS) Open(name string) (io.ReadCloser, error) { return os.Open(name) } - -var fs fileSystem = localFS{} - -type decodeConfig struct { - autoOrientation bool -} - -var defaultDecodeConfig = decodeConfig{ - autoOrientation: false, -} - -// DecodeOption sets an optional parameter for the Decode and Open functions. -type DecodeOption func(*decodeConfig) - -// AutoOrientation returns a DecodeOption that sets the auto-orientation mode. -// If auto-orientation is enabled, the image will be transformed after decoding -// according to the EXIF orientation tag (if present). By default it's disabled. -func AutoOrientation(enabled bool) DecodeOption { - return func(c *decodeConfig) { - c.autoOrientation = enabled - } -} - -// Decode reads an image from r. -func Decode(r io.Reader, opts ...DecodeOption) (image.Image, error) { - cfg := defaultDecodeConfig - for _, option := range opts { - option(&cfg) - } - - if !cfg.autoOrientation { - img, _, err := image.Decode(r) - return img, err - } - - var orient orientation - pr, pw := io.Pipe() - r = io.TeeReader(r, pw) - done := make(chan struct{}) - go func() { - defer close(done) - orient = readOrientation(pr) - io.Copy(ioutil.Discard, pr) - }() - - img, _, err := image.Decode(r) - pw.Close() - <-done - if err != nil { - return nil, err - } - - return fixOrientation(img, orient), nil -} - -// Open loads an image from file. -// -// Examples: -// -// // Load an image from file. -// img, err := imaging.Open("test.jpg") -// -// // Load an image and transform it depending on the EXIF orientation tag (if present). -// img, err := imaging.Open("test.jpg", imaging.AutoOrientation(true)) -// -func Open(filename string, opts ...DecodeOption) (image.Image, error) { - file, err := fs.Open(filename) - if err != nil { - return nil, err - } - defer file.Close() - return Decode(file, opts...) -} - -// Format is an image file format. -type Format int - -// Image file formats. -const ( - JPEG Format = iota - PNG - GIF - TIFF - BMP -) - -var formatExts = map[string]Format{ - "jpg": JPEG, - "jpeg": JPEG, - "png": PNG, - "gif": GIF, - "tif": TIFF, - "tiff": TIFF, - "bmp": BMP, -} - -var formatNames = map[Format]string{ - JPEG: "JPEG", - PNG: "PNG", - GIF: "GIF", - TIFF: "TIFF", - BMP: "BMP", -} - -func (f Format) String() string { - return formatNames[f] -} - -// ErrUnsupportedFormat means the given image format is not supported. -var ErrUnsupportedFormat = errors.New("imaging: unsupported image format") - -// FormatFromExtension parses image format from filename extension: -// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported. -func FormatFromExtension(ext string) (Format, error) { - if f, ok := formatExts[strings.ToLower(strings.TrimPrefix(ext, "."))]; ok { - return f, nil - } - return -1, ErrUnsupportedFormat -} - -// FormatFromFilename parses image format from filename: -// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported. -func FormatFromFilename(filename string) (Format, error) { - ext := filepath.Ext(filename) - return FormatFromExtension(ext) -} - -type encodeConfig struct { - jpegQuality int - gifNumColors int - gifQuantizer draw.Quantizer - gifDrawer draw.Drawer - pngCompressionLevel png.CompressionLevel -} - -var defaultEncodeConfig = encodeConfig{ - jpegQuality: 95, - gifNumColors: 256, - gifQuantizer: nil, - gifDrawer: nil, - pngCompressionLevel: png.DefaultCompression, -} - -// EncodeOption sets an optional parameter for the Encode and Save functions. -type EncodeOption func(*encodeConfig) - -// JPEGQuality returns an EncodeOption that sets the output JPEG quality. -// Quality ranges from 1 to 100 inclusive, higher is better. Default is 95. -func JPEGQuality(quality int) EncodeOption { - return func(c *encodeConfig) { - c.jpegQuality = quality - } -} - -// GIFNumColors returns an EncodeOption that sets the maximum number of colors -// used in the GIF-encoded image. It ranges from 1 to 256. Default is 256. -func GIFNumColors(numColors int) EncodeOption { - return func(c *encodeConfig) { - c.gifNumColors = numColors - } -} - -// GIFQuantizer returns an EncodeOption that sets the quantizer that is used to produce -// a palette of the GIF-encoded image. -func GIFQuantizer(quantizer draw.Quantizer) EncodeOption { - return func(c *encodeConfig) { - c.gifQuantizer = quantizer - } -} - -// GIFDrawer returns an EncodeOption that sets the drawer that is used to convert -// the source image to the desired palette of the GIF-encoded image. -func GIFDrawer(drawer draw.Drawer) EncodeOption { - return func(c *encodeConfig) { - c.gifDrawer = drawer - } -} - -// PNGCompressionLevel returns an EncodeOption that sets the compression level -// of the PNG-encoded image. Default is png.DefaultCompression. -func PNGCompressionLevel(level png.CompressionLevel) EncodeOption { - return func(c *encodeConfig) { - c.pngCompressionLevel = level - } -} - -// Encode writes the image img to w in the specified format (JPEG, PNG, GIF, TIFF or BMP). -func Encode(w io.Writer, img image.Image, format Format, opts ...EncodeOption) error { - cfg := defaultEncodeConfig - for _, option := range opts { - option(&cfg) - } - - switch format { - case JPEG: - if nrgba, ok := img.(*image.NRGBA); ok && nrgba.Opaque() { - rgba := &image.RGBA{ - Pix: nrgba.Pix, - Stride: nrgba.Stride, - Rect: nrgba.Rect, - } - return jpeg.Encode(w, rgba, &jpeg.Options{Quality: cfg.jpegQuality}) - } - return jpeg.Encode(w, img, &jpeg.Options{Quality: cfg.jpegQuality}) - - case PNG: - encoder := png.Encoder{CompressionLevel: cfg.pngCompressionLevel} - return encoder.Encode(w, img) - - case GIF: - return gif.Encode(w, img, &gif.Options{ - NumColors: cfg.gifNumColors, - Quantizer: cfg.gifQuantizer, - Drawer: cfg.gifDrawer, - }) - - case TIFF: - return tiff.Encode(w, img, &tiff.Options{Compression: tiff.Deflate, Predictor: true}) - - case BMP: - return bmp.Encode(w, img) - } - - return ErrUnsupportedFormat -} - -// Save saves the image to file with the specified filename. -// The format is determined from the filename extension: -// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported. -// -// Examples: -// -// // Save the image as PNG. -// err := imaging.Save(img, "out.png") -// -// // Save the image as JPEG with optional quality parameter set to 80. -// err := imaging.Save(img, "out.jpg", imaging.JPEGQuality(80)) -// -func Save(img image.Image, filename string, opts ...EncodeOption) (err error) { - f, err := FormatFromFilename(filename) - if err != nil { - return err - } - file, err := fs.Create(filename) - if err != nil { - return err - } - err = Encode(file, img, f, opts...) - errc := file.Close() - if err == nil { - err = errc - } - return err -} - -// orientation is an EXIF flag that specifies the transformation -// that should be applied to image to display it correctly. -type orientation int - -const ( - orientationUnspecified = 0 - orientationNormal = 1 - orientationFlipH = 2 - orientationRotate180 = 3 - orientationFlipV = 4 - orientationTranspose = 5 - orientationRotate270 = 6 - orientationTransverse = 7 - orientationRotate90 = 8 -) - -// readOrientation tries to read the orientation EXIF flag from image data in r. -// If the EXIF data block is not found or the orientation flag is not found -// or any other error occures while reading the data, it returns the -// orientationUnspecified (0) value. -func readOrientation(r io.Reader) orientation { - const ( - markerSOI = 0xffd8 - markerAPP1 = 0xffe1 - exifHeader = 0x45786966 - byteOrderBE = 0x4d4d - byteOrderLE = 0x4949 - orientationTag = 0x0112 - ) - - // Check if JPEG SOI marker is present. - var soi uint16 - if err := binary.Read(r, binary.BigEndian, &soi); err != nil { - return orientationUnspecified - } - if soi != markerSOI { - return orientationUnspecified // Missing JPEG SOI marker. - } - - // Find JPEG APP1 marker. - for { - var marker, size uint16 - if err := binary.Read(r, binary.BigEndian, &marker); err != nil { - return orientationUnspecified - } - if err := binary.Read(r, binary.BigEndian, &size); err != nil { - return orientationUnspecified - } - if marker>>8 != 0xff { - return orientationUnspecified // Invalid JPEG marker. - } - if marker == markerAPP1 { - break - } - if size < 2 { - return orientationUnspecified // Invalid block size. - } - if _, err := io.CopyN(ioutil.Discard, r, int64(size-2)); err != nil { - return orientationUnspecified - } - } - - // Check if EXIF header is present. - var header uint32 - if err := binary.Read(r, binary.BigEndian, &header); err != nil { - return orientationUnspecified - } - if header != exifHeader { - return orientationUnspecified - } - if _, err := io.CopyN(ioutil.Discard, r, 2); err != nil { - return orientationUnspecified - } - - // Read byte order information. - var ( - byteOrderTag uint16 - byteOrder binary.ByteOrder - ) - if err := binary.Read(r, binary.BigEndian, &byteOrderTag); err != nil { - return orientationUnspecified - } - switch byteOrderTag { - case byteOrderBE: - byteOrder = binary.BigEndian - case byteOrderLE: - byteOrder = binary.LittleEndian - default: - return orientationUnspecified // Invalid byte order flag. - } - if _, err := io.CopyN(ioutil.Discard, r, 2); err != nil { - return orientationUnspecified - } - - // Skip the EXIF offset. - var offset uint32 - if err := binary.Read(r, byteOrder, &offset); err != nil { - return orientationUnspecified - } - if offset < 8 { - return orientationUnspecified // Invalid offset value. - } - if _, err := io.CopyN(ioutil.Discard, r, int64(offset-8)); err != nil { - return orientationUnspecified - } - - // Read the number of tags. - var numTags uint16 - if err := binary.Read(r, byteOrder, &numTags); err != nil { - return orientationUnspecified - } - - // Find the orientation tag. - for i := 0; i < int(numTags); i++ { - var tag uint16 - if err := binary.Read(r, byteOrder, &tag); err != nil { - return orientationUnspecified - } - if tag != orientationTag { - if _, err := io.CopyN(ioutil.Discard, r, 10); err != nil { - return orientationUnspecified - } - continue - } - if _, err := io.CopyN(ioutil.Discard, r, 6); err != nil { - return orientationUnspecified - } - var val uint16 - if err := binary.Read(r, byteOrder, &val); err != nil { - return orientationUnspecified - } - if val < 1 || val > 8 { - return orientationUnspecified // Invalid tag value. - } - return orientation(val) - } - return orientationUnspecified // Missing orientation tag. -} - -// fixOrientation applies a transform to img corresponding to the given orientation flag. -func fixOrientation(img image.Image, o orientation) image.Image { - switch o { - case orientationNormal: - case orientationFlipH: - img = FlipH(img) - case orientationFlipV: - img = FlipV(img) - case orientationRotate90: - img = Rotate90(img) - case orientationRotate180: - img = Rotate180(img) - case orientationRotate270: - img = Rotate270(img) - case orientationTranspose: - img = Transpose(img) - case orientationTransverse: - img = Transverse(img) - } - return img -} diff --git a/vendor/github.com/disintegration/imaging/resize.go b/vendor/github.com/disintegration/imaging/resize.go deleted file mode 100644 index 706435e3d..000000000 --- a/vendor/github.com/disintegration/imaging/resize.go +++ /dev/null @@ -1,595 +0,0 @@ -package imaging - -import ( - "image" - "math" -) - -type indexWeight struct { - index int - weight float64 -} - -func precomputeWeights(dstSize, srcSize int, filter ResampleFilter) [][]indexWeight { - du := float64(srcSize) / float64(dstSize) - scale := du - if scale < 1.0 { - scale = 1.0 - } - ru := math.Ceil(scale * filter.Support) - - out := make([][]indexWeight, dstSize) - tmp := make([]indexWeight, 0, dstSize*int(ru+2)*2) - - for v := 0; v < dstSize; v++ { - fu := (float64(v)+0.5)*du - 0.5 - - begin := int(math.Ceil(fu - ru)) - if begin < 0 { - begin = 0 - } - end := int(math.Floor(fu + ru)) - if end > srcSize-1 { - end = srcSize - 1 - } - - var sum float64 - for u := begin; u <= end; u++ { - w := filter.Kernel((float64(u) - fu) / scale) - if w != 0 { - sum += w - tmp = append(tmp, indexWeight{index: u, weight: w}) - } - } - if sum != 0 { - for i := range tmp { - tmp[i].weight /= sum - } - } - - out[v] = tmp - tmp = tmp[len(tmp):] - } - - return out -} - -// Resize resizes the image to the specified width and height using the specified resampling -// filter and returns the transformed image. If one of width or height is 0, the image aspect -// ratio is preserved. -// -// Example: -// -// dstImage := imaging.Resize(srcImage, 800, 600, imaging.Lanczos) -// -func Resize(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA { - dstW, dstH := width, height - if dstW < 0 || dstH < 0 { - return &image.NRGBA{} - } - if dstW == 0 && dstH == 0 { - return &image.NRGBA{} - } - - srcW := img.Bounds().Dx() - srcH := img.Bounds().Dy() - if srcW <= 0 || srcH <= 0 { - return &image.NRGBA{} - } - - // If new width or height is 0 then preserve aspect ratio, minimum 1px. - if dstW == 0 { - tmpW := float64(dstH) * float64(srcW) / float64(srcH) - dstW = int(math.Max(1.0, math.Floor(tmpW+0.5))) - } - if dstH == 0 { - tmpH := float64(dstW) * float64(srcH) / float64(srcW) - dstH = int(math.Max(1.0, math.Floor(tmpH+0.5))) - } - - if filter.Support <= 0 { - // Nearest-neighbor special case. - return resizeNearest(img, dstW, dstH) - } - - if srcW != dstW && srcH != dstH { - return resizeVertical(resizeHorizontal(img, dstW, filter), dstH, filter) - } - if srcW != dstW { - return resizeHorizontal(img, dstW, filter) - } - if srcH != dstH { - return resizeVertical(img, dstH, filter) - } - return Clone(img) -} - -func resizeHorizontal(img image.Image, width int, filter ResampleFilter) *image.NRGBA { - src := newScanner(img) - dst := image.NewNRGBA(image.Rect(0, 0, width, src.h)) - weights := precomputeWeights(width, src.w, filter) - parallel(0, src.h, func(ys <-chan int) { - scanLine := make([]uint8, src.w*4) - for y := range ys { - src.scan(0, y, src.w, y+1, scanLine) - j0 := y * dst.Stride - for x := range weights { - var r, g, b, a float64 - for _, w := range weights[x] { - i := w.index * 4 - s := scanLine[i : i+4 : i+4] - aw := float64(s[3]) * w.weight - r += float64(s[0]) * aw - g += float64(s[1]) * aw - b += float64(s[2]) * aw - a += aw - } - if a != 0 { - aInv := 1 / a - j := j0 + x*4 - d := dst.Pix[j : j+4 : j+4] - d[0] = clamp(r * aInv) - d[1] = clamp(g * aInv) - d[2] = clamp(b * aInv) - d[3] = clamp(a) - } - } - } - }) - return dst -} - -func resizeVertical(img image.Image, height int, filter ResampleFilter) *image.NRGBA { - src := newScanner(img) - dst := image.NewNRGBA(image.Rect(0, 0, src.w, height)) - weights := precomputeWeights(height, src.h, filter) - parallel(0, src.w, func(xs <-chan int) { - scanLine := make([]uint8, src.h*4) - for x := range xs { - src.scan(x, 0, x+1, src.h, scanLine) - for y := range weights { - var r, g, b, a float64 - for _, w := range weights[y] { - i := w.index * 4 - s := scanLine[i : i+4 : i+4] - aw := float64(s[3]) * w.weight - r += float64(s[0]) * aw - g += float64(s[1]) * aw - b += float64(s[2]) * aw - a += aw - } - if a != 0 { - aInv := 1 / a - j := y*dst.Stride + x*4 - d := dst.Pix[j : j+4 : j+4] - d[0] = clamp(r * aInv) - d[1] = clamp(g * aInv) - d[2] = clamp(b * aInv) - d[3] = clamp(a) - } - } - } - }) - return dst -} - -// resizeNearest is a fast nearest-neighbor resize, no filtering. -func resizeNearest(img image.Image, width, height int) *image.NRGBA { - dst := image.NewNRGBA(image.Rect(0, 0, width, height)) - dx := float64(img.Bounds().Dx()) / float64(width) - dy := float64(img.Bounds().Dy()) / float64(height) - - if dx > 1 && dy > 1 { - src := newScanner(img) - parallel(0, height, func(ys <-chan int) { - for y := range ys { - srcY := int((float64(y) + 0.5) * dy) - dstOff := y * dst.Stride - for x := 0; x < width; x++ { - srcX := int((float64(x) + 0.5) * dx) - src.scan(srcX, srcY, srcX+1, srcY+1, dst.Pix[dstOff:dstOff+4]) - dstOff += 4 - } - } - }) - } else { - src := toNRGBA(img) - parallel(0, height, func(ys <-chan int) { - for y := range ys { - srcY := int((float64(y) + 0.5) * dy) - srcOff0 := srcY * src.Stride - dstOff := y * dst.Stride - for x := 0; x < width; x++ { - srcX := int((float64(x) + 0.5) * dx) - srcOff := srcOff0 + srcX*4 - copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4]) - dstOff += 4 - } - } - }) - } - - return dst -} - -// Fit scales down the image using the specified resample filter to fit the specified -// maximum width and height and returns the transformed image. -// -// Example: -// -// dstImage := imaging.Fit(srcImage, 800, 600, imaging.Lanczos) -// -func Fit(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA { - maxW, maxH := width, height - - if maxW <= 0 || maxH <= 0 { - return &image.NRGBA{} - } - - srcBounds := img.Bounds() - srcW := srcBounds.Dx() - srcH := srcBounds.Dy() - - if srcW <= 0 || srcH <= 0 { - return &image.NRGBA{} - } - - if srcW <= maxW && srcH <= maxH { - return Clone(img) - } - - srcAspectRatio := float64(srcW) / float64(srcH) - maxAspectRatio := float64(maxW) / float64(maxH) - - var newW, newH int - if srcAspectRatio > maxAspectRatio { - newW = maxW - newH = int(float64(newW) / srcAspectRatio) - } else { - newH = maxH - newW = int(float64(newH) * srcAspectRatio) - } - - return Resize(img, newW, newH, filter) -} - -// Fill creates an image with the specified dimensions and fills it with the scaled source image. -// To achieve the correct aspect ratio without stretching, the source image will be cropped. -// -// Example: -// -// dstImage := imaging.Fill(srcImage, 800, 600, imaging.Center, imaging.Lanczos) -// -func Fill(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA { - dstW, dstH := width, height - - if dstW <= 0 || dstH <= 0 { - return &image.NRGBA{} - } - - srcBounds := img.Bounds() - srcW := srcBounds.Dx() - srcH := srcBounds.Dy() - - if srcW <= 0 || srcH <= 0 { - return &image.NRGBA{} - } - - if srcW == dstW && srcH == dstH { - return Clone(img) - } - - if srcW >= 100 && srcH >= 100 { - return cropAndResize(img, dstW, dstH, anchor, filter) - } - return resizeAndCrop(img, dstW, dstH, anchor, filter) -} - -// cropAndResize crops the image to the smallest possible size that has the required aspect ratio using -// the given anchor point, then scales it to the specified dimensions and returns the transformed image. -// -// This is generally faster than resizing first, but may result in inaccuracies when used on small source images. -func cropAndResize(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA { - dstW, dstH := width, height - - srcBounds := img.Bounds() - srcW := srcBounds.Dx() - srcH := srcBounds.Dy() - srcAspectRatio := float64(srcW) / float64(srcH) - dstAspectRatio := float64(dstW) / float64(dstH) - - var tmp *image.NRGBA - if srcAspectRatio < dstAspectRatio { - cropH := float64(srcW) * float64(dstH) / float64(dstW) - tmp = CropAnchor(img, srcW, int(math.Max(1, cropH)+0.5), anchor) - } else { - cropW := float64(srcH) * float64(dstW) / float64(dstH) - tmp = CropAnchor(img, int(math.Max(1, cropW)+0.5), srcH, anchor) - } - - return Resize(tmp, dstW, dstH, filter) -} - -// resizeAndCrop resizes the image to the smallest possible size that will cover the specified dimensions, -// crops the resized image to the specified dimensions using the given anchor point and returns -// the transformed image. -func resizeAndCrop(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA { - dstW, dstH := width, height - - srcBounds := img.Bounds() - srcW := srcBounds.Dx() - srcH := srcBounds.Dy() - srcAspectRatio := float64(srcW) / float64(srcH) - dstAspectRatio := float64(dstW) / float64(dstH) - - var tmp *image.NRGBA - if srcAspectRatio < dstAspectRatio { - tmp = Resize(img, dstW, 0, filter) - } else { - tmp = Resize(img, 0, dstH, filter) - } - - return CropAnchor(tmp, dstW, dstH, anchor) -} - -// Thumbnail scales the image up or down using the specified resample filter, crops it -// to the specified width and hight and returns the transformed image. -// -// Example: -// -// dstImage := imaging.Thumbnail(srcImage, 100, 100, imaging.Lanczos) -// -func Thumbnail(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA { - return Fill(img, width, height, Center, filter) -} - -// ResampleFilter specifies a resampling filter to be used for image resizing. -// -// General filter recommendations: -// -// - Lanczos -// A high-quality resampling filter for photographic images yielding sharp results. -// -// - CatmullRom -// A sharp cubic filter that is faster than Lanczos filter while providing similar results. -// -// - MitchellNetravali -// A cubic filter that produces smoother results with less ringing artifacts than CatmullRom. -// -// - Linear -// Bilinear resampling filter, produces a smooth output. Faster than cubic filters. -// -// - Box -// Simple and fast averaging filter appropriate for downscaling. -// When upscaling it's similar to NearestNeighbor. -// -// - NearestNeighbor -// Fastest resampling filter, no antialiasing. -// -type ResampleFilter struct { - Support float64 - Kernel func(float64) float64 -} - -// NearestNeighbor is a nearest-neighbor filter (no anti-aliasing). -var NearestNeighbor ResampleFilter - -// Box filter (averaging pixels). -var Box ResampleFilter - -// Linear filter. -var Linear ResampleFilter - -// Hermite cubic spline filter (BC-spline; B=0; C=0). -var Hermite ResampleFilter - -// MitchellNetravali is Mitchell-Netravali cubic filter (BC-spline; B=1/3; C=1/3). -var MitchellNetravali ResampleFilter - -// CatmullRom is a Catmull-Rom - sharp cubic filter (BC-spline; B=0; C=0.5). -var CatmullRom ResampleFilter - -// BSpline is a smooth cubic filter (BC-spline; B=1; C=0). -var BSpline ResampleFilter - -// Gaussian is a Gaussian blurring filter. -var Gaussian ResampleFilter - -// Bartlett is a Bartlett-windowed sinc filter (3 lobes). -var Bartlett ResampleFilter - -// Lanczos filter (3 lobes). -var Lanczos ResampleFilter - -// Hann is a Hann-windowed sinc filter (3 lobes). -var Hann ResampleFilter - -// Hamming is a Hamming-windowed sinc filter (3 lobes). -var Hamming ResampleFilter - -// Blackman is a Blackman-windowed sinc filter (3 lobes). -var Blackman ResampleFilter - -// Welch is a Welch-windowed sinc filter (parabolic window, 3 lobes). -var Welch ResampleFilter - -// Cosine is a Cosine-windowed sinc filter (3 lobes). -var Cosine ResampleFilter - -func bcspline(x, b, c float64) float64 { - var y float64 - x = math.Abs(x) - if x < 1.0 { - y = ((12-9*b-6*c)*x*x*x + (-18+12*b+6*c)*x*x + (6 - 2*b)) / 6 - } else if x < 2.0 { - y = ((-b-6*c)*x*x*x + (6*b+30*c)*x*x + (-12*b-48*c)*x + (8*b + 24*c)) / 6 - } - return y -} - -func sinc(x float64) float64 { - if x == 0 { - return 1 - } - return math.Sin(math.Pi*x) / (math.Pi * x) -} - -func init() { - NearestNeighbor = ResampleFilter{ - Support: 0.0, // special case - not applying the filter - } - - Box = ResampleFilter{ - Support: 0.5, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x <= 0.5 { - return 1.0 - } - return 0 - }, - } - - Linear = ResampleFilter{ - Support: 1.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 1.0 { - return 1.0 - x - } - return 0 - }, - } - - Hermite = ResampleFilter{ - Support: 1.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 1.0 { - return bcspline(x, 0.0, 0.0) - } - return 0 - }, - } - - MitchellNetravali = ResampleFilter{ - Support: 2.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 2.0 { - return bcspline(x, 1.0/3.0, 1.0/3.0) - } - return 0 - }, - } - - CatmullRom = ResampleFilter{ - Support: 2.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 2.0 { - return bcspline(x, 0.0, 0.5) - } - return 0 - }, - } - - BSpline = ResampleFilter{ - Support: 2.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 2.0 { - return bcspline(x, 1.0, 0.0) - } - return 0 - }, - } - - Gaussian = ResampleFilter{ - Support: 2.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 2.0 { - return math.Exp(-2 * x * x) - } - return 0 - }, - } - - Bartlett = ResampleFilter{ - Support: 3.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 3.0 { - return sinc(x) * (3.0 - x) / 3.0 - } - return 0 - }, - } - - Lanczos = ResampleFilter{ - Support: 3.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 3.0 { - return sinc(x) * sinc(x/3.0) - } - return 0 - }, - } - - Hann = ResampleFilter{ - Support: 3.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 3.0 { - return sinc(x) * (0.5 + 0.5*math.Cos(math.Pi*x/3.0)) - } - return 0 - }, - } - - Hamming = ResampleFilter{ - Support: 3.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 3.0 { - return sinc(x) * (0.54 + 0.46*math.Cos(math.Pi*x/3.0)) - } - return 0 - }, - } - - Blackman = ResampleFilter{ - Support: 3.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 3.0 { - return sinc(x) * (0.42 - 0.5*math.Cos(math.Pi*x/3.0+math.Pi) + 0.08*math.Cos(2.0*math.Pi*x/3.0)) - } - return 0 - }, - } - - Welch = ResampleFilter{ - Support: 3.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 3.0 { - return sinc(x) * (1.0 - (x * x / 9.0)) - } - return 0 - }, - } - - Cosine = ResampleFilter{ - Support: 3.0, - Kernel: func(x float64) float64 { - x = math.Abs(x) - if x < 3.0 { - return sinc(x) * math.Cos((math.Pi/2.0)*(x/3.0)) - } - return 0 - }, - } -} diff --git a/vendor/github.com/disintegration/imaging/scanner.go b/vendor/github.com/disintegration/imaging/scanner.go deleted file mode 100644 index 37d92cef8..000000000 --- a/vendor/github.com/disintegration/imaging/scanner.go +++ /dev/null @@ -1,285 +0,0 @@ -package imaging - -import ( - "image" - "image/color" -) - -type scanner struct { - image image.Image - w, h int - palette []color.NRGBA -} - -func newScanner(img image.Image) *scanner { - s := &scanner{ - image: img, - w: img.Bounds().Dx(), - h: img.Bounds().Dy(), - } - if img, ok := img.(*image.Paletted); ok { - s.palette = make([]color.NRGBA, len(img.Palette)) - for i := 0; i < len(img.Palette); i++ { - s.palette[i] = color.NRGBAModel.Convert(img.Palette[i]).(color.NRGBA) - } - } - return s -} - -// scan scans the given rectangular region of the image into dst. -func (s *scanner) scan(x1, y1, x2, y2 int, dst []uint8) { - switch img := s.image.(type) { - case *image.NRGBA: - size := (x2 - x1) * 4 - j := 0 - i := y1*img.Stride + x1*4 - if size == 4 { - for y := y1; y < y2; y++ { - d := dst[j : j+4 : j+4] - s := img.Pix[i : i+4 : i+4] - d[0] = s[0] - d[1] = s[1] - d[2] = s[2] - d[3] = s[3] - j += size - i += img.Stride - } - } else { - for y := y1; y < y2; y++ { - copy(dst[j:j+size], img.Pix[i:i+size]) - j += size - i += img.Stride - } - } - - case *image.NRGBA64: - j := 0 - for y := y1; y < y2; y++ { - i := y*img.Stride + x1*8 - for x := x1; x < x2; x++ { - s := img.Pix[i : i+8 : i+8] - d := dst[j : j+4 : j+4] - d[0] = s[0] - d[1] = s[2] - d[2] = s[4] - d[3] = s[6] - j += 4 - i += 8 - } - } - - case *image.RGBA: - j := 0 - for y := y1; y < y2; y++ { - i := y*img.Stride + x1*4 - for x := x1; x < x2; x++ { - d := dst[j : j+4 : j+4] - a := img.Pix[i+3] - switch a { - case 0: - d[0] = 0 - d[1] = 0 - d[2] = 0 - d[3] = a - case 0xff: - s := img.Pix[i : i+4 : i+4] - d[0] = s[0] - d[1] = s[1] - d[2] = s[2] - d[3] = a - default: - s := img.Pix[i : i+4 : i+4] - r16 := uint16(s[0]) - g16 := uint16(s[1]) - b16 := uint16(s[2]) - a16 := uint16(a) - d[0] = uint8(r16 * 0xff / a16) - d[1] = uint8(g16 * 0xff / a16) - d[2] = uint8(b16 * 0xff / a16) - d[3] = a - } - j += 4 - i += 4 - } - } - - case *image.RGBA64: - j := 0 - for y := y1; y < y2; y++ { - i := y*img.Stride + x1*8 - for x := x1; x < x2; x++ { - s := img.Pix[i : i+8 : i+8] - d := dst[j : j+4 : j+4] - a := s[6] - switch a { - case 0: - d[0] = 0 - d[1] = 0 - d[2] = 0 - case 0xff: - d[0] = s[0] - d[1] = s[2] - d[2] = s[4] - default: - r32 := uint32(s[0])<<8 | uint32(s[1]) - g32 := uint32(s[2])<<8 | uint32(s[3]) - b32 := uint32(s[4])<<8 | uint32(s[5]) - a32 := uint32(s[6])<<8 | uint32(s[7]) - d[0] = uint8((r32 * 0xffff / a32) >> 8) - d[1] = uint8((g32 * 0xffff / a32) >> 8) - d[2] = uint8((b32 * 0xffff / a32) >> 8) - } - d[3] = a - j += 4 - i += 8 - } - } - - case *image.Gray: - j := 0 - for y := y1; y < y2; y++ { - i := y*img.Stride + x1 - for x := x1; x < x2; x++ { - c := img.Pix[i] - d := dst[j : j+4 : j+4] - d[0] = c - d[1] = c - d[2] = c - d[3] = 0xff - j += 4 - i++ - } - } - - case *image.Gray16: - j := 0 - for y := y1; y < y2; y++ { - i := y*img.Stride + x1*2 - for x := x1; x < x2; x++ { - c := img.Pix[i] - d := dst[j : j+4 : j+4] - d[0] = c - d[1] = c - d[2] = c - d[3] = 0xff - j += 4 - i += 2 - } - } - - case *image.YCbCr: - j := 0 - x1 += img.Rect.Min.X - x2 += img.Rect.Min.X - y1 += img.Rect.Min.Y - y2 += img.Rect.Min.Y - - hy := img.Rect.Min.Y / 2 - hx := img.Rect.Min.X / 2 - for y := y1; y < y2; y++ { - iy := (y-img.Rect.Min.Y)*img.YStride + (x1 - img.Rect.Min.X) - - var yBase int - switch img.SubsampleRatio { - case image.YCbCrSubsampleRatio444, image.YCbCrSubsampleRatio422: - yBase = (y - img.Rect.Min.Y) * img.CStride - case image.YCbCrSubsampleRatio420, image.YCbCrSubsampleRatio440: - yBase = (y/2 - hy) * img.CStride - } - - for x := x1; x < x2; x++ { - var ic int - switch img.SubsampleRatio { - case image.YCbCrSubsampleRatio444, image.YCbCrSubsampleRatio440: - ic = yBase + (x - img.Rect.Min.X) - case image.YCbCrSubsampleRatio422, image.YCbCrSubsampleRatio420: - ic = yBase + (x/2 - hx) - default: - ic = img.COffset(x, y) - } - - yy1 := int32(img.Y[iy]) * 0x10101 - cb1 := int32(img.Cb[ic]) - 128 - cr1 := int32(img.Cr[ic]) - 128 - - r := yy1 + 91881*cr1 - if uint32(r)&0xff000000 == 0 { - r >>= 16 - } else { - r = ^(r >> 31) - } - - g := yy1 - 22554*cb1 - 46802*cr1 - if uint32(g)&0xff000000 == 0 { - g >>= 16 - } else { - g = ^(g >> 31) - } - - b := yy1 + 116130*cb1 - if uint32(b)&0xff000000 == 0 { - b >>= 16 - } else { - b = ^(b >> 31) - } - - d := dst[j : j+4 : j+4] - d[0] = uint8(r) - d[1] = uint8(g) - d[2] = uint8(b) - d[3] = 0xff - - iy++ - j += 4 - } - } - - case *image.Paletted: - j := 0 - for y := y1; y < y2; y++ { - i := y*img.Stride + x1 - for x := x1; x < x2; x++ { - c := s.palette[img.Pix[i]] - d := dst[j : j+4 : j+4] - d[0] = c.R - d[1] = c.G - d[2] = c.B - d[3] = c.A - j += 4 - i++ - } - } - - default: - j := 0 - b := s.image.Bounds() - x1 += b.Min.X - x2 += b.Min.X - y1 += b.Min.Y - y2 += b.Min.Y - for y := y1; y < y2; y++ { - for x := x1; x < x2; x++ { - r16, g16, b16, a16 := s.image.At(x, y).RGBA() - d := dst[j : j+4 : j+4] - switch a16 { - case 0xffff: - d[0] = uint8(r16 >> 8) - d[1] = uint8(g16 >> 8) - d[2] = uint8(b16 >> 8) - d[3] = 0xff - case 0: - d[0] = 0 - d[1] = 0 - d[2] = 0 - d[3] = 0 - default: - d[0] = uint8(((r16 * 0xffff) / a16) >> 8) - d[1] = uint8(((g16 * 0xffff) / a16) >> 8) - d[2] = uint8(((b16 * 0xffff) / a16) >> 8) - d[3] = uint8(a16 >> 8) - } - j += 4 - } - } - } -} diff --git a/vendor/github.com/disintegration/imaging/tools.go b/vendor/github.com/disintegration/imaging/tools.go deleted file mode 100644 index 0ec19a039..000000000 --- a/vendor/github.com/disintegration/imaging/tools.go +++ /dev/null @@ -1,249 +0,0 @@ -package imaging - -import ( - "bytes" - "image" - "image/color" - "math" -) - -// New creates a new image with the specified width and height, and fills it with the specified color. -func New(width, height int, fillColor color.Color) *image.NRGBA { - if width <= 0 || height <= 0 { - return &image.NRGBA{} - } - - c := color.NRGBAModel.Convert(fillColor).(color.NRGBA) - if (c == color.NRGBA{0, 0, 0, 0}) { - return image.NewNRGBA(image.Rect(0, 0, width, height)) - } - - return &image.NRGBA{ - Pix: bytes.Repeat([]byte{c.R, c.G, c.B, c.A}, width*height), - Stride: 4 * width, - Rect: image.Rect(0, 0, width, height), - } -} - -// Clone returns a copy of the given image. -func Clone(img image.Image) *image.NRGBA { - src := newScanner(img) - dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h)) - size := src.w * 4 - parallel(0, src.h, func(ys <-chan int) { - for y := range ys { - i := y * dst.Stride - src.scan(0, y, src.w, y+1, dst.Pix[i:i+size]) - } - }) - return dst -} - -// Anchor is the anchor point for image alignment. -type Anchor int - -// Anchor point positions. -const ( - Center Anchor = iota - TopLeft - Top - TopRight - Left - Right - BottomLeft - Bottom - BottomRight -) - -func anchorPt(b image.Rectangle, w, h int, anchor Anchor) image.Point { - var x, y int - switch anchor { - case TopLeft: - x = b.Min.X - y = b.Min.Y - case Top: - x = b.Min.X + (b.Dx()-w)/2 - y = b.Min.Y - case TopRight: - x = b.Max.X - w - y = b.Min.Y - case Left: - x = b.Min.X - y = b.Min.Y + (b.Dy()-h)/2 - case Right: - x = b.Max.X - w - y = b.Min.Y + (b.Dy()-h)/2 - case BottomLeft: - x = b.Min.X - y = b.Max.Y - h - case Bottom: - x = b.Min.X + (b.Dx()-w)/2 - y = b.Max.Y - h - case BottomRight: - x = b.Max.X - w - y = b.Max.Y - h - default: - x = b.Min.X + (b.Dx()-w)/2 - y = b.Min.Y + (b.Dy()-h)/2 - } - return image.Pt(x, y) -} - -// Crop cuts out a rectangular region with the specified bounds -// from the image and returns the cropped image. -func Crop(img image.Image, rect image.Rectangle) *image.NRGBA { - r := rect.Intersect(img.Bounds()).Sub(img.Bounds().Min) - if r.Empty() { - return &image.NRGBA{} - } - src := newScanner(img) - dst := image.NewNRGBA(image.Rect(0, 0, r.Dx(), r.Dy())) - rowSize := r.Dx() * 4 - parallel(r.Min.Y, r.Max.Y, func(ys <-chan int) { - for y := range ys { - i := (y - r.Min.Y) * dst.Stride - src.scan(r.Min.X, y, r.Max.X, y+1, dst.Pix[i:i+rowSize]) - } - }) - return dst -} - -// CropAnchor cuts out a rectangular region with the specified size -// from the image using the specified anchor point and returns the cropped image. -func CropAnchor(img image.Image, width, height int, anchor Anchor) *image.NRGBA { - srcBounds := img.Bounds() - pt := anchorPt(srcBounds, width, height, anchor) - r := image.Rect(0, 0, width, height).Add(pt) - b := srcBounds.Intersect(r) - return Crop(img, b) -} - -// CropCenter cuts out a rectangular region with the specified size -// from the center of the image and returns the cropped image. -func CropCenter(img image.Image, width, height int) *image.NRGBA { - return CropAnchor(img, width, height, Center) -} - -// Paste pastes the img image to the background image at the specified position and returns the combined image. -func Paste(background, img image.Image, pos image.Point) *image.NRGBA { - dst := Clone(background) - pos = pos.Sub(background.Bounds().Min) - pasteRect := image.Rectangle{Min: pos, Max: pos.Add(img.Bounds().Size())} - interRect := pasteRect.Intersect(dst.Bounds()) - if interRect.Empty() { - return dst - } - src := newScanner(img) - parallel(interRect.Min.Y, interRect.Max.Y, func(ys <-chan int) { - for y := range ys { - x1 := interRect.Min.X - pasteRect.Min.X - x2 := interRect.Max.X - pasteRect.Min.X - y1 := y - pasteRect.Min.Y - y2 := y1 + 1 - i1 := y*dst.Stride + interRect.Min.X*4 - i2 := i1 + interRect.Dx()*4 - src.scan(x1, y1, x2, y2, dst.Pix[i1:i2]) - } - }) - return dst -} - -// PasteCenter pastes the img image to the center of the background image and returns the combined image. -func PasteCenter(background, img image.Image) *image.NRGBA { - bgBounds := background.Bounds() - bgW := bgBounds.Dx() - bgH := bgBounds.Dy() - bgMinX := bgBounds.Min.X - bgMinY := bgBounds.Min.Y - - centerX := bgMinX + bgW/2 - centerY := bgMinY + bgH/2 - - x0 := centerX - img.Bounds().Dx()/2 - y0 := centerY - img.Bounds().Dy()/2 - - return Paste(background, img, image.Pt(x0, y0)) -} - -// Overlay draws the img image over the background image at given position -// and returns the combined image. Opacity parameter is the opacity of the img -// image layer, used to compose the images, it must be from 0.0 to 1.0. -// -// Examples: -// -// // Draw spriteImage over backgroundImage at the given position (x=50, y=50). -// dstImage := imaging.Overlay(backgroundImage, spriteImage, image.Pt(50, 50), 1.0) -// -// // Blend two opaque images of the same size. -// dstImage := imaging.Overlay(imageOne, imageTwo, image.Pt(0, 0), 0.5) -// -func Overlay(background, img image.Image, pos image.Point, opacity float64) *image.NRGBA { - opacity = math.Min(math.Max(opacity, 0.0), 1.0) // Ensure 0.0 <= opacity <= 1.0. - dst := Clone(background) - pos = pos.Sub(background.Bounds().Min) - pasteRect := image.Rectangle{Min: pos, Max: pos.Add(img.Bounds().Size())} - interRect := pasteRect.Intersect(dst.Bounds()) - if interRect.Empty() { - return dst - } - src := newScanner(img) - parallel(interRect.Min.Y, interRect.Max.Y, func(ys <-chan int) { - scanLine := make([]uint8, interRect.Dx()*4) - for y := range ys { - x1 := interRect.Min.X - pasteRect.Min.X - x2 := interRect.Max.X - pasteRect.Min.X - y1 := y - pasteRect.Min.Y - y2 := y1 + 1 - src.scan(x1, y1, x2, y2, scanLine) - i := y*dst.Stride + interRect.Min.X*4 - j := 0 - for x := interRect.Min.X; x < interRect.Max.X; x++ { - d := dst.Pix[i : i+4 : i+4] - r1 := float64(d[0]) - g1 := float64(d[1]) - b1 := float64(d[2]) - a1 := float64(d[3]) - - s := scanLine[j : j+4 : j+4] - r2 := float64(s[0]) - g2 := float64(s[1]) - b2 := float64(s[2]) - a2 := float64(s[3]) - - coef2 := opacity * a2 / 255 - coef1 := (1 - coef2) * a1 / 255 - coefSum := coef1 + coef2 - coef1 /= coefSum - coef2 /= coefSum - - d[0] = uint8(r1*coef1 + r2*coef2) - d[1] = uint8(g1*coef1 + g2*coef2) - d[2] = uint8(b1*coef1 + b2*coef2) - d[3] = uint8(math.Min(a1+a2*opacity*(255-a1)/255, 255)) - - i += 4 - j += 4 - } - } - }) - return dst -} - -// OverlayCenter overlays the img image to the center of the background image and -// returns the combined image. Opacity parameter is the opacity of the img -// image layer, used to compose the images, it must be from 0.0 to 1.0. -func OverlayCenter(background, img image.Image, opacity float64) *image.NRGBA { - bgBounds := background.Bounds() - bgW := bgBounds.Dx() - bgH := bgBounds.Dy() - bgMinX := bgBounds.Min.X - bgMinY := bgBounds.Min.Y - - centerX := bgMinX + bgW/2 - centerY := bgMinY + bgH/2 - - x0 := centerX - img.Bounds().Dx()/2 - y0 := centerY - img.Bounds().Dy()/2 - - return Overlay(background, img, image.Point{x0, y0}, opacity) -} diff --git a/vendor/github.com/disintegration/imaging/transform.go b/vendor/github.com/disintegration/imaging/transform.go deleted file mode 100644 index fe4a92f9d..000000000 --- a/vendor/github.com/disintegration/imaging/transform.go +++ /dev/null @@ -1,268 +0,0 @@ -package imaging - -import ( - "image" - "image/color" - "math" -) - -// FlipH flips the image horizontally (from left to right) and returns the transformed image. -func FlipH(img image.Image) *image.NRGBA { - src := newScanner(img) - dstW := src.w - dstH := src.h - rowSize := dstW * 4 - dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) - parallel(0, dstH, func(ys <-chan int) { - for dstY := range ys { - i := dstY * dst.Stride - srcY := dstY - src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize]) - reverse(dst.Pix[i : i+rowSize]) - } - }) - return dst -} - -// FlipV flips the image vertically (from top to bottom) and returns the transformed image. -func FlipV(img image.Image) *image.NRGBA { - src := newScanner(img) - dstW := src.w - dstH := src.h - rowSize := dstW * 4 - dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) - parallel(0, dstH, func(ys <-chan int) { - for dstY := range ys { - i := dstY * dst.Stride - srcY := dstH - dstY - 1 - src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize]) - } - }) - return dst -} - -// Transpose flips the image horizontally and rotates 90 degrees counter-clockwise. -func Transpose(img image.Image) *image.NRGBA { - src := newScanner(img) - dstW := src.h - dstH := src.w - rowSize := dstW * 4 - dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) - parallel(0, dstH, func(ys <-chan int) { - for dstY := range ys { - i := dstY * dst.Stride - srcX := dstY - src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize]) - } - }) - return dst -} - -// Transverse flips the image vertically and rotates 90 degrees counter-clockwise. -func Transverse(img image.Image) *image.NRGBA { - src := newScanner(img) - dstW := src.h - dstH := src.w - rowSize := dstW * 4 - dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) - parallel(0, dstH, func(ys <-chan int) { - for dstY := range ys { - i := dstY * dst.Stride - srcX := dstH - dstY - 1 - src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize]) - reverse(dst.Pix[i : i+rowSize]) - } - }) - return dst -} - -// Rotate90 rotates the image 90 degrees counter-clockwise and returns the transformed image. -func Rotate90(img image.Image) *image.NRGBA { - src := newScanner(img) - dstW := src.h - dstH := src.w - rowSize := dstW * 4 - dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) - parallel(0, dstH, func(ys <-chan int) { - for dstY := range ys { - i := dstY * dst.Stride - srcX := dstH - dstY - 1 - src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize]) - } - }) - return dst -} - -// Rotate180 rotates the image 180 degrees counter-clockwise and returns the transformed image. -func Rotate180(img image.Image) *image.NRGBA { - src := newScanner(img) - dstW := src.w - dstH := src.h - rowSize := dstW * 4 - dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) - parallel(0, dstH, func(ys <-chan int) { - for dstY := range ys { - i := dstY * dst.Stride - srcY := dstH - dstY - 1 - src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize]) - reverse(dst.Pix[i : i+rowSize]) - } - }) - return dst -} - -// Rotate270 rotates the image 270 degrees counter-clockwise and returns the transformed image. -func Rotate270(img image.Image) *image.NRGBA { - src := newScanner(img) - dstW := src.h - dstH := src.w - rowSize := dstW * 4 - dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) - parallel(0, dstH, func(ys <-chan int) { - for dstY := range ys { - i := dstY * dst.Stride - srcX := dstY - src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize]) - reverse(dst.Pix[i : i+rowSize]) - } - }) - return dst -} - -// Rotate rotates an image by the given angle counter-clockwise . -// The angle parameter is the rotation angle in degrees. -// The bgColor parameter specifies the color of the uncovered zone after the rotation. -func Rotate(img image.Image, angle float64, bgColor color.Color) *image.NRGBA { - angle = angle - math.Floor(angle/360)*360 - - switch angle { - case 0: - return Clone(img) - case 90: - return Rotate90(img) - case 180: - return Rotate180(img) - case 270: - return Rotate270(img) - } - - src := toNRGBA(img) - srcW := src.Bounds().Max.X - srcH := src.Bounds().Max.Y - dstW, dstH := rotatedSize(srcW, srcH, angle) - dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH)) - - if dstW <= 0 || dstH <= 0 { - return dst - } - - srcXOff := float64(srcW)/2 - 0.5 - srcYOff := float64(srcH)/2 - 0.5 - dstXOff := float64(dstW)/2 - 0.5 - dstYOff := float64(dstH)/2 - 0.5 - - bgColorNRGBA := color.NRGBAModel.Convert(bgColor).(color.NRGBA) - sin, cos := math.Sincos(math.Pi * angle / 180) - - parallel(0, dstH, func(ys <-chan int) { - for dstY := range ys { - for dstX := 0; dstX < dstW; dstX++ { - xf, yf := rotatePoint(float64(dstX)-dstXOff, float64(dstY)-dstYOff, sin, cos) - xf, yf = xf+srcXOff, yf+srcYOff - interpolatePoint(dst, dstX, dstY, src, xf, yf, bgColorNRGBA) - } - } - }) - - return dst -} - -func rotatePoint(x, y, sin, cos float64) (float64, float64) { - return x*cos - y*sin, x*sin + y*cos -} - -func rotatedSize(w, h int, angle float64) (int, int) { - if w <= 0 || h <= 0 { - return 0, 0 - } - - sin, cos := math.Sincos(math.Pi * angle / 180) - x1, y1 := rotatePoint(float64(w-1), 0, sin, cos) - x2, y2 := rotatePoint(float64(w-1), float64(h-1), sin, cos) - x3, y3 := rotatePoint(0, float64(h-1), sin, cos) - - minx := math.Min(x1, math.Min(x2, math.Min(x3, 0))) - maxx := math.Max(x1, math.Max(x2, math.Max(x3, 0))) - miny := math.Min(y1, math.Min(y2, math.Min(y3, 0))) - maxy := math.Max(y1, math.Max(y2, math.Max(y3, 0))) - - neww := maxx - minx + 1 - if neww-math.Floor(neww) > 0.1 { - neww++ - } - newh := maxy - miny + 1 - if newh-math.Floor(newh) > 0.1 { - newh++ - } - - return int(neww), int(newh) -} - -func interpolatePoint(dst *image.NRGBA, dstX, dstY int, src *image.NRGBA, xf, yf float64, bgColor color.NRGBA) { - j := dstY*dst.Stride + dstX*4 - d := dst.Pix[j : j+4 : j+4] - - x0 := int(math.Floor(xf)) - y0 := int(math.Floor(yf)) - bounds := src.Bounds() - if !image.Pt(x0, y0).In(image.Rect(bounds.Min.X-1, bounds.Min.Y-1, bounds.Max.X, bounds.Max.Y)) { - d[0] = bgColor.R - d[1] = bgColor.G - d[2] = bgColor.B - d[3] = bgColor.A - return - } - - xq := xf - float64(x0) - yq := yf - float64(y0) - points := [4]image.Point{ - {x0, y0}, - {x0 + 1, y0}, - {x0, y0 + 1}, - {x0 + 1, y0 + 1}, - } - weights := [4]float64{ - (1 - xq) * (1 - yq), - xq * (1 - yq), - (1 - xq) * yq, - xq * yq, - } - - var r, g, b, a float64 - for i := 0; i < 4; i++ { - p := points[i] - w := weights[i] - if p.In(bounds) { - i := p.Y*src.Stride + p.X*4 - s := src.Pix[i : i+4 : i+4] - wa := float64(s[3]) * w - r += float64(s[0]) * wa - g += float64(s[1]) * wa - b += float64(s[2]) * wa - a += wa - } else { - wa := float64(bgColor.A) * w - r += float64(bgColor.R) * wa - g += float64(bgColor.G) * wa - b += float64(bgColor.B) * wa - a += wa - } - } - if a != 0 { - aInv := 1 / a - d[0] = clamp(r * aInv) - d[1] = clamp(g * aInv) - d[2] = clamp(b * aInv) - d[3] = clamp(a) - } -} diff --git a/vendor/github.com/disintegration/imaging/utils.go b/vendor/github.com/disintegration/imaging/utils.go deleted file mode 100644 index 6c7af1a51..000000000 --- a/vendor/github.com/disintegration/imaging/utils.go +++ /dev/null @@ -1,167 +0,0 @@ -package imaging - -import ( - "image" - "math" - "runtime" - "sync" -) - -// parallel processes the data in separate goroutines. -func parallel(start, stop int, fn func(<-chan int)) { - count := stop - start - if count < 1 { - return - } - - procs := runtime.GOMAXPROCS(0) - if procs > count { - procs = count - } - - c := make(chan int, count) - for i := start; i < stop; i++ { - c <- i - } - close(c) - - var wg sync.WaitGroup - for i := 0; i < procs; i++ { - wg.Add(1) - go func() { - defer wg.Done() - fn(c) - }() - } - wg.Wait() -} - -// absint returns the absolute value of i. -func absint(i int) int { - if i < 0 { - return -i - } - return i -} - -// clamp rounds and clamps float64 value to fit into uint8. -func clamp(x float64) uint8 { - v := int64(x + 0.5) - if v > 255 { - return 255 - } - if v > 0 { - return uint8(v) - } - return 0 -} - -func reverse(pix []uint8) { - if len(pix) <= 4 { - return - } - i := 0 - j := len(pix) - 4 - for i < j { - pi := pix[i : i+4 : i+4] - pj := pix[j : j+4 : j+4] - pi[0], pj[0] = pj[0], pi[0] - pi[1], pj[1] = pj[1], pi[1] - pi[2], pj[2] = pj[2], pi[2] - pi[3], pj[3] = pj[3], pi[3] - i += 4 - j -= 4 - } -} - -func toNRGBA(img image.Image) *image.NRGBA { - if img, ok := img.(*image.NRGBA); ok { - return &image.NRGBA{ - Pix: img.Pix, - Stride: img.Stride, - Rect: img.Rect.Sub(img.Rect.Min), - } - } - return Clone(img) -} - -// rgbToHSL converts a color from RGB to HSL. -func rgbToHSL(r, g, b uint8) (float64, float64, float64) { - rr := float64(r) / 255 - gg := float64(g) / 255 - bb := float64(b) / 255 - - max := math.Max(rr, math.Max(gg, bb)) - min := math.Min(rr, math.Min(gg, bb)) - - l := (max + min) / 2 - - if max == min { - return 0, 0, l - } - - var h, s float64 - d := max - min - if l > 0.5 { - s = d / (2 - max - min) - } else { - s = d / (max + min) - } - - switch max { - case rr: - h = (gg - bb) / d - if g < b { - h += 6 - } - case gg: - h = (bb-rr)/d + 2 - case bb: - h = (rr-gg)/d + 4 - } - h /= 6 - - return h, s, l -} - -// hslToRGB converts a color from HSL to RGB. -func hslToRGB(h, s, l float64) (uint8, uint8, uint8) { - var r, g, b float64 - if s == 0 { - v := clamp(l * 255) - return v, v, v - } - - var q float64 - if l < 0.5 { - q = l * (1 + s) - } else { - q = l + s - l*s - } - p := 2*l - q - - r = hueToRGB(p, q, h+1/3.0) - g = hueToRGB(p, q, h) - b = hueToRGB(p, q, h-1/3.0) - - return clamp(r * 255), clamp(g * 255), clamp(b * 255) -} - -func hueToRGB(p, q, t float64) float64 { - if t < 0 { - t++ - } - if t > 1 { - t-- - } - if t < 1/6.0 { - return p + (q-p)*6*t - } - if t < 1/2.0 { - return q - } - if t < 2/3.0 { - return p + (q-p)*(2/3.0-t)*6 - } - return p -} diff --git a/vendor/golang.org/x/image/bmp/reader.go b/vendor/golang.org/x/image/bmp/reader.go deleted file mode 100644 index 1939c1120..000000000 --- a/vendor/golang.org/x/image/bmp/reader.go +++ /dev/null @@ -1,253 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package bmp implements a BMP image decoder and encoder. -// -// The BMP specification is at http://www.digicamsoft.com/bmp/bmp.html. -package bmp // import "golang.org/x/image/bmp" - -import ( - "errors" - "image" - "image/color" - "io" -) - -// ErrUnsupported means that the input BMP image uses a valid but unsupported -// feature. -var ErrUnsupported = errors.New("bmp: unsupported BMP image") - -func readUint16(b []byte) uint16 { - return uint16(b[0]) | uint16(b[1])<<8 -} - -func readUint32(b []byte) uint32 { - return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 -} - -// decodePaletted reads an 8 bit-per-pixel BMP image from r. -// If topDown is false, the image rows will be read bottom-up. -func decodePaletted(r io.Reader, c image.Config, topDown bool) (image.Image, error) { - paletted := image.NewPaletted(image.Rect(0, 0, c.Width, c.Height), c.ColorModel.(color.Palette)) - if c.Width == 0 || c.Height == 0 { - return paletted, nil - } - var tmp [4]byte - y0, y1, yDelta := c.Height-1, -1, -1 - if topDown { - y0, y1, yDelta = 0, c.Height, +1 - } - for y := y0; y != y1; y += yDelta { - p := paletted.Pix[y*paletted.Stride : y*paletted.Stride+c.Width] - if _, err := io.ReadFull(r, p); err != nil { - return nil, err - } - // Each row is 4-byte aligned. - if c.Width%4 != 0 { - _, err := io.ReadFull(r, tmp[:4-c.Width%4]) - if err != nil { - return nil, err - } - } - } - return paletted, nil -} - -// decodeRGB reads a 24 bit-per-pixel BMP image from r. -// If topDown is false, the image rows will be read bottom-up. -func decodeRGB(r io.Reader, c image.Config, topDown bool) (image.Image, error) { - rgba := image.NewRGBA(image.Rect(0, 0, c.Width, c.Height)) - if c.Width == 0 || c.Height == 0 { - return rgba, nil - } - // There are 3 bytes per pixel, and each row is 4-byte aligned. - b := make([]byte, (3*c.Width+3)&^3) - y0, y1, yDelta := c.Height-1, -1, -1 - if topDown { - y0, y1, yDelta = 0, c.Height, +1 - } - for y := y0; y != y1; y += yDelta { - if _, err := io.ReadFull(r, b); err != nil { - return nil, err - } - p := rgba.Pix[y*rgba.Stride : y*rgba.Stride+c.Width*4] - for i, j := 0, 0; i < len(p); i, j = i+4, j+3 { - // BMP images are stored in BGR order rather than RGB order. - p[i+0] = b[j+2] - p[i+1] = b[j+1] - p[i+2] = b[j+0] - p[i+3] = 0xFF - } - } - return rgba, nil -} - -// decodeNRGBA reads a 32 bit-per-pixel BMP image from r. -// If topDown is false, the image rows will be read bottom-up. -func decodeNRGBA(r io.Reader, c image.Config, topDown, allowAlpha bool) (image.Image, error) { - rgba := image.NewNRGBA(image.Rect(0, 0, c.Width, c.Height)) - if c.Width == 0 || c.Height == 0 { - return rgba, nil - } - y0, y1, yDelta := c.Height-1, -1, -1 - if topDown { - y0, y1, yDelta = 0, c.Height, +1 - } - for y := y0; y != y1; y += yDelta { - p := rgba.Pix[y*rgba.Stride : y*rgba.Stride+c.Width*4] - if _, err := io.ReadFull(r, p); err != nil { - return nil, err - } - for i := 0; i < len(p); i += 4 { - // BMP images are stored in BGRA order rather than RGBA order. - p[i+0], p[i+2] = p[i+2], p[i+0] - if !allowAlpha { - p[i+3] = 0xFF - } - } - } - return rgba, nil -} - -// Decode reads a BMP image from r and returns it as an image.Image. -// Limitation: The file must be 8, 24 or 32 bits per pixel. -func Decode(r io.Reader) (image.Image, error) { - c, bpp, topDown, allowAlpha, err := decodeConfig(r) - if err != nil { - return nil, err - } - switch bpp { - case 8: - return decodePaletted(r, c, topDown) - case 24: - return decodeRGB(r, c, topDown) - case 32: - return decodeNRGBA(r, c, topDown, allowAlpha) - } - panic("unreachable") -} - -// DecodeConfig returns the color model and dimensions of a BMP image without -// decoding the entire image. -// Limitation: The file must be 8, 24 or 32 bits per pixel. -func DecodeConfig(r io.Reader) (image.Config, error) { - config, _, _, _, err := decodeConfig(r) - return config, err -} - -func decodeConfig(r io.Reader) (config image.Config, bitsPerPixel int, topDown bool, allowAlpha bool, err error) { - // We only support those BMP images with one of the following DIB headers: - // - BITMAPINFOHEADER (40 bytes) - // - BITMAPV4HEADER (108 bytes) - // - BITMAPV5HEADER (124 bytes) - const ( - fileHeaderLen = 14 - infoHeaderLen = 40 - v4InfoHeaderLen = 108 - v5InfoHeaderLen = 124 - ) - var b [1024]byte - if _, err := io.ReadFull(r, b[:fileHeaderLen+4]); err != nil { - if err == io.EOF { - err = io.ErrUnexpectedEOF - } - return image.Config{}, 0, false, false, err - } - if string(b[:2]) != "BM" { - return image.Config{}, 0, false, false, errors.New("bmp: invalid format") - } - offset := readUint32(b[10:14]) - infoLen := readUint32(b[14:18]) - if infoLen != infoHeaderLen && infoLen != v4InfoHeaderLen && infoLen != v5InfoHeaderLen { - return image.Config{}, 0, false, false, ErrUnsupported - } - if _, err := io.ReadFull(r, b[fileHeaderLen+4:fileHeaderLen+infoLen]); err != nil { - if err == io.EOF { - err = io.ErrUnexpectedEOF - } - return image.Config{}, 0, false, false, err - } - width := int(int32(readUint32(b[18:22]))) - height := int(int32(readUint32(b[22:26]))) - if height < 0 { - height, topDown = -height, true - } - if width < 0 || height < 0 { - return image.Config{}, 0, false, false, ErrUnsupported - } - // We only support 1 plane and 8, 24 or 32 bits per pixel and no - // compression. - planes, bpp, compression := readUint16(b[26:28]), readUint16(b[28:30]), readUint32(b[30:34]) - // if compression is set to BI_BITFIELDS, but the bitmask is set to the default bitmask - // that would be used if compression was set to 0, we can continue as if compression was 0 - if compression == 3 && infoLen > infoHeaderLen && - readUint32(b[54:58]) == 0xff0000 && readUint32(b[58:62]) == 0xff00 && - readUint32(b[62:66]) == 0xff && readUint32(b[66:70]) == 0xff000000 { - compression = 0 - } - if planes != 1 || compression != 0 { - return image.Config{}, 0, false, false, ErrUnsupported - } - switch bpp { - case 8: - colorUsed := readUint32(b[46:50]) - // If colorUsed is 0, it is set to the maximum number of colors for the given bpp, which is 2^bpp. - if colorUsed == 0 { - colorUsed = 256 - } else if colorUsed > 256 { - return image.Config{}, 0, false, false, ErrUnsupported - } - - if offset != fileHeaderLen+infoLen+colorUsed*4 { - return image.Config{}, 0, false, false, ErrUnsupported - } - _, err = io.ReadFull(r, b[:colorUsed*4]) - if err != nil { - return image.Config{}, 0, false, false, err - } - pcm := make(color.Palette, colorUsed) - for i := range pcm { - // BMP images are stored in BGR order rather than RGB order. - // Every 4th byte is padding. - pcm[i] = color.RGBA{b[4*i+2], b[4*i+1], b[4*i+0], 0xFF} - } - return image.Config{ColorModel: pcm, Width: width, Height: height}, 8, topDown, false, nil - case 24: - if offset != fileHeaderLen+infoLen { - return image.Config{}, 0, false, false, ErrUnsupported - } - return image.Config{ColorModel: color.RGBAModel, Width: width, Height: height}, 24, topDown, false, nil - case 32: - if offset != fileHeaderLen+infoLen { - return image.Config{}, 0, false, false, ErrUnsupported - } - // 32 bits per pixel is possibly RGBX (X is padding) or RGBA (A is - // alpha transparency). However, for BMP images, "Alpha is a - // poorly-documented and inconsistently-used feature" says - // https://source.chromium.org/chromium/chromium/src/+/bc0a792d7ebc587190d1a62ccddba10abeea274b:third_party/blink/renderer/platform/image-decoders/bmp/bmp_image_reader.cc;l=621 - // - // That goes on to say "BITMAPV3HEADER+ have an alpha bitmask in the - // info header... so we respect it at all times... [For earlier - // (smaller) headers we] ignore alpha in Windows V3 BMPs except inside - // ICO files". - // - // "Ignore" means to always set alpha to 0xFF (fully opaque): - // https://source.chromium.org/chromium/chromium/src/+/bc0a792d7ebc587190d1a62ccddba10abeea274b:third_party/blink/renderer/platform/image-decoders/bmp/bmp_image_reader.h;l=272 - // - // Confusingly, "Windows V3" does not correspond to BITMAPV3HEADER, but - // instead corresponds to the earlier (smaller) BITMAPINFOHEADER: - // https://source.chromium.org/chromium/chromium/src/+/bc0a792d7ebc587190d1a62ccddba10abeea274b:third_party/blink/renderer/platform/image-decoders/bmp/bmp_image_reader.cc;l=258 - // - // This Go package does not support ICO files and the (infoLen > - // infoHeaderLen) condition distinguishes BITMAPINFOHEADER (40 bytes) - // vs later (larger) headers. - allowAlpha = infoLen > infoHeaderLen - return image.Config{ColorModel: color.RGBAModel, Width: width, Height: height}, 32, topDown, allowAlpha, nil - } - return image.Config{}, 0, false, false, ErrUnsupported -} - -func init() { - image.RegisterFormat("bmp", "BM????\x00\x00\x00\x00", Decode, DecodeConfig) -} diff --git a/vendor/golang.org/x/image/bmp/writer.go b/vendor/golang.org/x/image/bmp/writer.go deleted file mode 100644 index f07b39dba..000000000 --- a/vendor/golang.org/x/image/bmp/writer.go +++ /dev/null @@ -1,262 +0,0 @@ -// Copyright 2013 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package bmp - -import ( - "encoding/binary" - "errors" - "image" - "io" -) - -type header struct { - sigBM [2]byte - fileSize uint32 - resverved [2]uint16 - pixOffset uint32 - dibHeaderSize uint32 - width uint32 - height uint32 - colorPlane uint16 - bpp uint16 - compression uint32 - imageSize uint32 - xPixelsPerMeter uint32 - yPixelsPerMeter uint32 - colorUse uint32 - colorImportant uint32 -} - -func encodePaletted(w io.Writer, pix []uint8, dx, dy, stride, step int) error { - var padding []byte - if dx < step { - padding = make([]byte, step-dx) - } - for y := dy - 1; y >= 0; y-- { - min := y*stride + 0 - max := y*stride + dx - if _, err := w.Write(pix[min:max]); err != nil { - return err - } - if padding != nil { - if _, err := w.Write(padding); err != nil { - return err - } - } - } - return nil -} - -func encodeRGBA(w io.Writer, pix []uint8, dx, dy, stride, step int, opaque bool) error { - buf := make([]byte, step) - if opaque { - for y := dy - 1; y >= 0; y-- { - min := y*stride + 0 - max := y*stride + dx*4 - off := 0 - for i := min; i < max; i += 4 { - buf[off+2] = pix[i+0] - buf[off+1] = pix[i+1] - buf[off+0] = pix[i+2] - off += 3 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - } else { - for y := dy - 1; y >= 0; y-- { - min := y*stride + 0 - max := y*stride + dx*4 - off := 0 - for i := min; i < max; i += 4 { - a := uint32(pix[i+3]) - if a == 0 { - buf[off+2] = 0 - buf[off+1] = 0 - buf[off+0] = 0 - buf[off+3] = 0 - off += 4 - continue - } else if a == 0xff { - buf[off+2] = pix[i+0] - buf[off+1] = pix[i+1] - buf[off+0] = pix[i+2] - buf[off+3] = 0xff - off += 4 - continue - } - buf[off+2] = uint8(((uint32(pix[i+0]) * 0xffff) / a) >> 8) - buf[off+1] = uint8(((uint32(pix[i+1]) * 0xffff) / a) >> 8) - buf[off+0] = uint8(((uint32(pix[i+2]) * 0xffff) / a) >> 8) - buf[off+3] = uint8(a) - off += 4 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - } - return nil -} - -func encodeNRGBA(w io.Writer, pix []uint8, dx, dy, stride, step int, opaque bool) error { - buf := make([]byte, step) - if opaque { - for y := dy - 1; y >= 0; y-- { - min := y*stride + 0 - max := y*stride + dx*4 - off := 0 - for i := min; i < max; i += 4 { - buf[off+2] = pix[i+0] - buf[off+1] = pix[i+1] - buf[off+0] = pix[i+2] - off += 3 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - } else { - for y := dy - 1; y >= 0; y-- { - min := y*stride + 0 - max := y*stride + dx*4 - off := 0 - for i := min; i < max; i += 4 { - buf[off+2] = pix[i+0] - buf[off+1] = pix[i+1] - buf[off+0] = pix[i+2] - buf[off+3] = pix[i+3] - off += 4 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - } - return nil -} - -func encode(w io.Writer, m image.Image, step int) error { - b := m.Bounds() - buf := make([]byte, step) - for y := b.Max.Y - 1; y >= b.Min.Y; y-- { - off := 0 - for x := b.Min.X; x < b.Max.X; x++ { - r, g, b, _ := m.At(x, y).RGBA() - buf[off+2] = byte(r >> 8) - buf[off+1] = byte(g >> 8) - buf[off+0] = byte(b >> 8) - off += 3 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - return nil -} - -// Encode writes the image m to w in BMP format. -func Encode(w io.Writer, m image.Image) error { - d := m.Bounds().Size() - if d.X < 0 || d.Y < 0 { - return errors.New("bmp: negative bounds") - } - h := &header{ - sigBM: [2]byte{'B', 'M'}, - fileSize: 14 + 40, - pixOffset: 14 + 40, - dibHeaderSize: 40, - width: uint32(d.X), - height: uint32(d.Y), - colorPlane: 1, - } - - var step int - var palette []byte - var opaque bool - switch m := m.(type) { - case *image.Gray: - step = (d.X + 3) &^ 3 - palette = make([]byte, 1024) - for i := 0; i < 256; i++ { - palette[i*4+0] = uint8(i) - palette[i*4+1] = uint8(i) - palette[i*4+2] = uint8(i) - palette[i*4+3] = 0xFF - } - h.imageSize = uint32(d.Y * step) - h.fileSize += uint32(len(palette)) + h.imageSize - h.pixOffset += uint32(len(palette)) - h.bpp = 8 - - case *image.Paletted: - step = (d.X + 3) &^ 3 - palette = make([]byte, 1024) - for i := 0; i < len(m.Palette) && i < 256; i++ { - r, g, b, _ := m.Palette[i].RGBA() - palette[i*4+0] = uint8(b >> 8) - palette[i*4+1] = uint8(g >> 8) - palette[i*4+2] = uint8(r >> 8) - palette[i*4+3] = 0xFF - } - h.imageSize = uint32(d.Y * step) - h.fileSize += uint32(len(palette)) + h.imageSize - h.pixOffset += uint32(len(palette)) - h.bpp = 8 - case *image.RGBA: - opaque = m.Opaque() - if opaque { - step = (3*d.X + 3) &^ 3 - h.bpp = 24 - } else { - step = 4 * d.X - h.bpp = 32 - } - h.imageSize = uint32(d.Y * step) - h.fileSize += h.imageSize - case *image.NRGBA: - opaque = m.Opaque() - if opaque { - step = (3*d.X + 3) &^ 3 - h.bpp = 24 - } else { - step = 4 * d.X - h.bpp = 32 - } - h.imageSize = uint32(d.Y * step) - h.fileSize += h.imageSize - default: - step = (3*d.X + 3) &^ 3 - h.imageSize = uint32(d.Y * step) - h.fileSize += h.imageSize - h.bpp = 24 - } - - if err := binary.Write(w, binary.LittleEndian, h); err != nil { - return err - } - if palette != nil { - if err := binary.Write(w, binary.LittleEndian, palette); err != nil { - return err - } - } - - if d.X == 0 || d.Y == 0 { - return nil - } - - switch m := m.(type) { - case *image.Gray: - return encodePaletted(w, m.Pix, d.X, d.Y, m.Stride, step) - case *image.Paletted: - return encodePaletted(w, m.Pix, d.X, d.Y, m.Stride, step) - case *image.RGBA: - return encodeRGBA(w, m.Pix, d.X, d.Y, m.Stride, step, opaque) - case *image.NRGBA: - return encodeNRGBA(w, m.Pix, d.X, d.Y, m.Stride, step, opaque) - } - return encode(w, m, step) -} diff --git a/vendor/golang.org/x/image/ccitt/reader.go b/vendor/golang.org/x/image/ccitt/reader.go deleted file mode 100644 index 340de0536..000000000 --- a/vendor/golang.org/x/image/ccitt/reader.go +++ /dev/null @@ -1,795 +0,0 @@ -// Copyright 2019 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -//go:generate go run gen.go - -// Package ccitt implements a CCITT (fax) image decoder. -package ccitt - -import ( - "encoding/binary" - "errors" - "image" - "io" - "math/bits" -) - -var ( - errIncompleteCode = errors.New("ccitt: incomplete code") - errInvalidBounds = errors.New("ccitt: invalid bounds") - errInvalidCode = errors.New("ccitt: invalid code") - errInvalidMode = errors.New("ccitt: invalid mode") - errInvalidOffset = errors.New("ccitt: invalid offset") - errMissingEOL = errors.New("ccitt: missing End-of-Line") - errRunLengthOverflowsWidth = errors.New("ccitt: run length overflows width") - errRunLengthTooLong = errors.New("ccitt: run length too long") - errUnsupportedMode = errors.New("ccitt: unsupported mode") - errUnsupportedSubFormat = errors.New("ccitt: unsupported sub-format") - errUnsupportedWidth = errors.New("ccitt: unsupported width") -) - -// Order specifies the bit ordering in a CCITT data stream. -type Order uint32 - -const ( - // LSB means Least Significant Bits first. - LSB Order = iota - // MSB means Most Significant Bits first. - MSB -) - -// SubFormat represents that the CCITT format consists of a number of -// sub-formats. Decoding or encoding a CCITT data stream requires knowing the -// sub-format context. It is not represented in the data stream per se. -type SubFormat uint32 - -const ( - Group3 SubFormat = iota - Group4 -) - -// AutoDetectHeight is passed as the height argument to NewReader to indicate -// that the image height (the number of rows) is not known in advance. -const AutoDetectHeight = -1 - -// Options are optional parameters. -type Options struct { - // Align means that some variable-bit-width codes are byte-aligned. - Align bool - // Invert means that black is the 1 bit or 0xFF byte, and white is 0. - Invert bool -} - -// maxWidth is the maximum (inclusive) supported width. This is a limitation of -// this implementation, to guard against integer overflow, and not anything -// inherent to the CCITT format. -const maxWidth = 1 << 20 - -func invertBytes(b []byte) { - for i, c := range b { - b[i] = ^c - } -} - -func reverseBitsWithinBytes(b []byte) { - for i, c := range b { - b[i] = bits.Reverse8(c) - } -} - -// highBits writes to dst (1 bit per pixel, most significant bit first) the -// high (0x80) bits from src (1 byte per pixel). It returns the number of bytes -// written and read such that dst[:d] is the packed form of src[:s]. -// -// For example, if src starts with the 8 bytes [0x7D, 0x7E, 0x7F, 0x80, 0x81, -// 0x82, 0x00, 0xFF] then 0x1D will be written to dst[0]. -// -// If src has (8 * len(dst)) or more bytes then only len(dst) bytes are -// written, (8 * len(dst)) bytes are read, and invert is ignored. -// -// Otherwise, if len(src) is not a multiple of 8 then the final byte written to -// dst is padded with 1 bits (if invert is true) or 0 bits. If inverted, the 1s -// are typically temporary, e.g. they will be flipped back to 0s by an -// invertBytes call in the highBits caller, reader.Read. -func highBits(dst []byte, src []byte, invert bool) (d int, s int) { - // Pack as many complete groups of 8 src bytes as we can. - n := len(src) / 8 - if n > len(dst) { - n = len(dst) - } - dstN := dst[:n] - for i := range dstN { - src8 := src[i*8 : i*8+8] - dstN[i] = ((src8[0] & 0x80) >> 0) | - ((src8[1] & 0x80) >> 1) | - ((src8[2] & 0x80) >> 2) | - ((src8[3] & 0x80) >> 3) | - ((src8[4] & 0x80) >> 4) | - ((src8[5] & 0x80) >> 5) | - ((src8[6] & 0x80) >> 6) | - ((src8[7] & 0x80) >> 7) - } - d, s = n, 8*n - dst, src = dst[d:], src[s:] - - // Pack up to 7 remaining src bytes, if there's room in dst. - if (len(dst) > 0) && (len(src) > 0) { - dstByte := byte(0) - if invert { - dstByte = 0xFF >> uint(len(src)) - } - for n, srcByte := range src { - dstByte |= (srcByte & 0x80) >> uint(n) - } - dst[0] = dstByte - d, s = d+1, s+len(src) - } - return d, s -} - -type bitReader struct { - r io.Reader - - // readErr is the error returned from the most recent r.Read call. As the - // io.Reader documentation says, when r.Read returns (n, err), "always - // process the n > 0 bytes returned before considering the error err". - readErr error - - // order is whether to process r's bytes LSB first or MSB first. - order Order - - // The high nBits bits of the bits field hold upcoming bits in MSB order. - bits uint64 - nBits uint32 - - // bytes[br:bw] holds bytes read from r but not yet loaded into bits. - br uint32 - bw uint32 - bytes [1024]uint8 -} - -func (b *bitReader) alignToByteBoundary() { - n := b.nBits & 7 - b.bits <<= n - b.nBits -= n -} - -// nextBitMaxNBits is the maximum possible value of bitReader.nBits after a -// bitReader.nextBit call, provided that bitReader.nBits was not more than this -// value before that call. -// -// Note that the decode function can unread bits, which can temporarily set the -// bitReader.nBits value above nextBitMaxNBits. -const nextBitMaxNBits = 31 - -func (b *bitReader) nextBit() (uint64, error) { - for { - if b.nBits > 0 { - bit := b.bits >> 63 - b.bits <<= 1 - b.nBits-- - return bit, nil - } - - if available := b.bw - b.br; available >= 4 { - // Read 32 bits, even though b.bits is a uint64, since the decode - // function may need to unread up to maxCodeLength bits, putting - // them back in the remaining (64 - 32) bits. TestMaxCodeLength - // checks that the generated maxCodeLength constant fits. - // - // If changing the Uint32 call, also change nextBitMaxNBits. - b.bits = uint64(binary.BigEndian.Uint32(b.bytes[b.br:])) << 32 - b.br += 4 - b.nBits = 32 - continue - } else if available > 0 { - b.bits = uint64(b.bytes[b.br]) << (7 * 8) - b.br++ - b.nBits = 8 - continue - } - - if b.readErr != nil { - return 0, b.readErr - } - - n, err := b.r.Read(b.bytes[:]) - b.br = 0 - b.bw = uint32(n) - b.readErr = err - - if b.order != MSB { - reverseBitsWithinBytes(b.bytes[:b.bw]) - } - } -} - -func decode(b *bitReader, decodeTable [][2]int16) (uint32, error) { - nBitsRead, bitsRead, state := uint32(0), uint64(0), int32(1) - for { - bit, err := b.nextBit() - if err != nil { - if err == io.EOF { - err = errIncompleteCode - } - return 0, err - } - bitsRead |= bit << (63 - nBitsRead) - nBitsRead++ - - // The "&1" is redundant, but can eliminate a bounds check. - state = int32(decodeTable[state][bit&1]) - if state < 0 { - return uint32(^state), nil - } else if state == 0 { - // Unread the bits we've read, then return errInvalidCode. - b.bits = (b.bits >> nBitsRead) | bitsRead - b.nBits += nBitsRead - return 0, errInvalidCode - } - } -} - -// decodeEOL decodes the 12-bit EOL code 0000_0000_0001. -func decodeEOL(b *bitReader) error { - nBitsRead, bitsRead := uint32(0), uint64(0) - for { - bit, err := b.nextBit() - if err != nil { - if err == io.EOF { - err = errMissingEOL - } - return err - } - bitsRead |= bit << (63 - nBitsRead) - nBitsRead++ - - if nBitsRead < 12 { - if bit&1 == 0 { - continue - } - } else if bit&1 != 0 { - return nil - } - - // Unread the bits we've read, then return errMissingEOL. - b.bits = (b.bits >> nBitsRead) | bitsRead - b.nBits += nBitsRead - return errMissingEOL - } -} - -type reader struct { - br bitReader - subFormat SubFormat - - // width is the image width in pixels. - width int - - // rowsRemaining starts at the image height in pixels, when the reader is - // driven through the io.Reader interface, and decrements to zero as rows - // are decoded. Alternatively, it may be negative if the image height is - // not known in advance at the time of the NewReader call. - // - // When driven through DecodeIntoGray, this field is unused. - rowsRemaining int - - // curr and prev hold the current and previous rows. Each element is either - // 0x00 (black) or 0xFF (white). - // - // prev may be nil, when processing the first row. - curr []byte - prev []byte - - // ri is the read index. curr[:ri] are those bytes of curr that have been - // passed along via the Read method. - // - // When the reader is driven through DecodeIntoGray, instead of through the - // io.Reader interface, this field is unused. - ri int - - // wi is the write index. curr[:wi] are those bytes of curr that have - // already been decoded via the decodeRow method. - // - // What this implementation calls wi is roughly equivalent to what the spec - // calls the a0 index. - wi int - - // These fields are copied from the *Options (which may be nil). - align bool - invert bool - - // atStartOfRow is whether we have just started the row. Some parts of the - // spec say to treat this situation as if "wi = -1". - atStartOfRow bool - - // penColorIsWhite is whether the next run is black or white. - penColorIsWhite bool - - // seenStartOfImage is whether we've called the startDecode method. - seenStartOfImage bool - - // truncated is whether the input is missing the final 6 consecutive EOL's - // (for Group3) or 2 consecutive EOL's (for Group4). Omitting that trailer - // (but otherwise padding to a byte boundary, with either all 0 bits or all - // 1 bits) is invalid according to the spec, but happens in practice when - // exporting from Adobe Acrobat to TIFF + CCITT. This package silently - // ignores the format error for CCITT input that has been truncated in that - // fashion, returning the full decoded image. - // - // Detecting trailer truncation (just after the final row of pixels) - // requires knowing which row is the final row, and therefore does not - // trigger if the image height is not known in advance. - truncated bool - - // readErr is a sticky error for the Read method. - readErr error -} - -func (z *reader) Read(p []byte) (int, error) { - if z.readErr != nil { - return 0, z.readErr - } - originalP := p - - for len(p) > 0 { - // Allocate buffers (and decode any start-of-image codes), if - // processing the first or second row. - if z.curr == nil { - if !z.seenStartOfImage { - if z.readErr = z.startDecode(); z.readErr != nil { - break - } - z.atStartOfRow = true - } - z.curr = make([]byte, z.width) - } - - // Decode the next row, if necessary. - if z.atStartOfRow { - if z.rowsRemaining < 0 { - // We do not know the image height in advance. See if the next - // code is an EOL. If it is, it is consumed. If it isn't, the - // bitReader shouldn't advance along the bit stream, and we - // simply decode another row of pixel data. - // - // For the Group4 subFormat, we may need to align to a byte - // boundary. For the Group3 subFormat, the previous z.decodeRow - // call (or z.startDecode call) has already consumed one of the - // 6 consecutive EOL's. The next EOL is actually the second of - // 6, in the middle, and we shouldn't align at that point. - if z.align && (z.subFormat == Group4) { - z.br.alignToByteBoundary() - } - - if err := z.decodeEOL(); err == errMissingEOL { - // No-op. It's another row of pixel data. - } else if err != nil { - z.readErr = err - break - } else { - if z.readErr = z.finishDecode(true); z.readErr != nil { - break - } - z.readErr = io.EOF - break - } - - } else if z.rowsRemaining == 0 { - // We do know the image height in advance, and we have already - // decoded exactly that many rows. - if z.readErr = z.finishDecode(false); z.readErr != nil { - break - } - z.readErr = io.EOF - break - - } else { - z.rowsRemaining-- - } - - if z.readErr = z.decodeRow(z.rowsRemaining == 0); z.readErr != nil { - break - } - } - - // Pack from z.curr (1 byte per pixel) to p (1 bit per pixel). - packD, packS := highBits(p, z.curr[z.ri:], z.invert) - p = p[packD:] - z.ri += packS - - // Prepare to decode the next row, if necessary. - if z.ri == len(z.curr) { - z.ri, z.curr, z.prev = 0, z.prev, z.curr - z.atStartOfRow = true - } - } - - n := len(originalP) - len(p) - if z.invert { - invertBytes(originalP[:n]) - } - return n, z.readErr -} - -func (z *reader) penColor() byte { - if z.penColorIsWhite { - return 0xFF - } - return 0x00 -} - -func (z *reader) startDecode() error { - switch z.subFormat { - case Group3: - if err := z.decodeEOL(); err != nil { - return err - } - - case Group4: - // No-op. - - default: - return errUnsupportedSubFormat - } - - z.seenStartOfImage = true - return nil -} - -func (z *reader) finishDecode(alreadySeenEOL bool) error { - numberOfEOLs := 0 - switch z.subFormat { - case Group3: - if z.truncated { - return nil - } - // The stream ends with a RTC (Return To Control) of 6 consecutive - // EOL's, but we should have already just seen an EOL, either in - // z.startDecode (for a zero-height image) or in z.decodeRow. - numberOfEOLs = 5 - - case Group4: - autoDetectHeight := z.rowsRemaining < 0 - if autoDetectHeight { - // Aligning to a byte boundary was already handled by reader.Read. - } else if z.align { - z.br.alignToByteBoundary() - } - // The stream ends with two EOL's. If the first one is missing, and we - // had an explicit image height, we just assume that the trailing two - // EOL's were truncated and return a nil error. - if err := z.decodeEOL(); err != nil { - if (err == errMissingEOL) && !autoDetectHeight { - z.truncated = true - return nil - } - return err - } - numberOfEOLs = 1 - - default: - return errUnsupportedSubFormat - } - - if alreadySeenEOL { - numberOfEOLs-- - } - for ; numberOfEOLs > 0; numberOfEOLs-- { - if err := z.decodeEOL(); err != nil { - return err - } - } - return nil -} - -func (z *reader) decodeEOL() error { - return decodeEOL(&z.br) -} - -func (z *reader) decodeRow(finalRow bool) error { - z.wi = 0 - z.atStartOfRow = true - z.penColorIsWhite = true - - if z.align { - z.br.alignToByteBoundary() - } - - switch z.subFormat { - case Group3: - for ; z.wi < len(z.curr); z.atStartOfRow = false { - if err := z.decodeRun(); err != nil { - return err - } - } - err := z.decodeEOL() - if finalRow && (err == errMissingEOL) { - z.truncated = true - return nil - } - return err - - case Group4: - for ; z.wi < len(z.curr); z.atStartOfRow = false { - mode, err := decode(&z.br, modeDecodeTable[:]) - if err != nil { - return err - } - rm := readerMode{} - if mode < uint32(len(readerModes)) { - rm = readerModes[mode] - } - if rm.function == nil { - return errInvalidMode - } - if err := rm.function(z, rm.arg); err != nil { - return err - } - } - return nil - } - - return errUnsupportedSubFormat -} - -func (z *reader) decodeRun() error { - table := blackDecodeTable[:] - if z.penColorIsWhite { - table = whiteDecodeTable[:] - } - - total := 0 - for { - n, err := decode(&z.br, table) - if err != nil { - return err - } - if n > maxWidth { - panic("unreachable") - } - total += int(n) - if total > maxWidth { - return errRunLengthTooLong - } - // Anything 0x3F or below is a terminal code. - if n <= 0x3F { - break - } - } - - if total > (len(z.curr) - z.wi) { - return errRunLengthOverflowsWidth - } - dst := z.curr[z.wi : z.wi+total] - penColor := z.penColor() - for i := range dst { - dst[i] = penColor - } - z.wi += total - z.penColorIsWhite = !z.penColorIsWhite - - return nil -} - -// The various modes' semantics are based on determining a row of pixels' -// "changing elements": those pixels whose color differs from the one on its -// immediate left. -// -// The row above the first row is implicitly all white. Similarly, the column -// to the left of the first column is implicitly all white. -// -// For example, here's Figure 1 in "ITU-T Recommendation T.6", where the -// current and previous rows contain black (B) and white (w) pixels. The a? -// indexes point into curr, the b? indexes point into prev. -// -// b1 b2 -// v v -// prev: BBBBBwwwwwBBBwwwww -// curr: BBBwwwwwBBBBBBwwww -// ^ ^ ^ -// a0 a1 a2 -// -// a0 is the "reference element" or current decoder position, roughly -// equivalent to what this implementation calls reader.wi. -// -// a1 is the next changing element to the right of a0, on the "coding line" -// (the current row). -// -// a2 is the next changing element to the right of a1, again on curr. -// -// b1 is the first changing element on the "reference line" (the previous row) -// to the right of a0 and of opposite color to a0. -// -// b2 is the next changing element to the right of b1, again on prev. -// -// The various modes calculate a1 (and a2, for modeH): -// - modePass calculates that a1 is at or to the right of b2. -// - modeH calculates a1 and a2 without considering b1 or b2. -// - modeV* calculates a1 to be b1 plus an adjustment (between -3 and +3). - -const ( - findB1 = false - findB2 = true -) - -// findB finds either the b1 or b2 value. -func (z *reader) findB(whichB bool) int { - // The initial row is a special case. The previous row is implicitly all - // white, so that there are no changing pixel elements. We return b1 or b2 - // to be at the end of the row. - if len(z.prev) != len(z.curr) { - return len(z.curr) - } - - i := z.wi - - if z.atStartOfRow { - // a0 is implicitly at -1, on a white pixel. b1 is the first black - // pixel in the previous row. b2 is the first white pixel after that. - for ; (i < len(z.prev)) && (z.prev[i] == 0xFF); i++ { - } - if whichB == findB2 { - for ; (i < len(z.prev)) && (z.prev[i] == 0x00); i++ { - } - } - return i - } - - // As per figure 1 above, assume that the current pen color is white. - // First, walk past every contiguous black pixel in prev, starting at a0. - oppositeColor := ^z.penColor() - for ; (i < len(z.prev)) && (z.prev[i] == oppositeColor); i++ { - } - - // Then walk past every contiguous white pixel. - penColor := ^oppositeColor - for ; (i < len(z.prev)) && (z.prev[i] == penColor); i++ { - } - - // We're now at a black pixel (or at the end of the row). That's b1. - if whichB == findB2 { - // If we're looking for b2, walk past every contiguous black pixel - // again. - oppositeColor := ^penColor - for ; (i < len(z.prev)) && (z.prev[i] == oppositeColor); i++ { - } - } - - return i -} - -type readerMode struct { - function func(z *reader, arg int) error - arg int -} - -var readerModes = [...]readerMode{ - modePass: {function: readerModePass}, - modeH: {function: readerModeH}, - modeV0: {function: readerModeV, arg: +0}, - modeVR1: {function: readerModeV, arg: +1}, - modeVR2: {function: readerModeV, arg: +2}, - modeVR3: {function: readerModeV, arg: +3}, - modeVL1: {function: readerModeV, arg: -1}, - modeVL2: {function: readerModeV, arg: -2}, - modeVL3: {function: readerModeV, arg: -3}, - modeExt: {function: readerModeExt}, -} - -func readerModePass(z *reader, arg int) error { - b2 := z.findB(findB2) - if (b2 < z.wi) || (len(z.curr) < b2) { - return errInvalidOffset - } - dst := z.curr[z.wi:b2] - penColor := z.penColor() - for i := range dst { - dst[i] = penColor - } - z.wi = b2 - return nil -} - -func readerModeH(z *reader, arg int) error { - // The first iteration finds a1. The second finds a2. - for i := 0; i < 2; i++ { - if err := z.decodeRun(); err != nil { - return err - } - } - return nil -} - -func readerModeV(z *reader, arg int) error { - a1 := z.findB(findB1) + arg - if (a1 < z.wi) || (len(z.curr) < a1) { - return errInvalidOffset - } - dst := z.curr[z.wi:a1] - penColor := z.penColor() - for i := range dst { - dst[i] = penColor - } - z.wi = a1 - z.penColorIsWhite = !z.penColorIsWhite - return nil -} - -func readerModeExt(z *reader, arg int) error { - return errUnsupportedMode -} - -// DecodeIntoGray decodes the CCITT-formatted data in r into dst. -// -// It returns an error if dst's width and height don't match the implied width -// and height of CCITT-formatted data. -func DecodeIntoGray(dst *image.Gray, r io.Reader, order Order, sf SubFormat, opts *Options) error { - bounds := dst.Bounds() - if (bounds.Dx() < 0) || (bounds.Dy() < 0) { - return errInvalidBounds - } - if bounds.Dx() > maxWidth { - return errUnsupportedWidth - } - - z := reader{ - br: bitReader{r: r, order: order}, - subFormat: sf, - align: (opts != nil) && opts.Align, - invert: (opts != nil) && opts.Invert, - width: bounds.Dx(), - } - if err := z.startDecode(); err != nil { - return err - } - - width := bounds.Dx() - for y := bounds.Min.Y; y < bounds.Max.Y; y++ { - p := (y - bounds.Min.Y) * dst.Stride - z.curr = dst.Pix[p : p+width] - if err := z.decodeRow(y+1 == bounds.Max.Y); err != nil { - return err - } - z.curr, z.prev = nil, z.curr - } - - if err := z.finishDecode(false); err != nil { - return err - } - - if z.invert { - for y := bounds.Min.Y; y < bounds.Max.Y; y++ { - p := (y - bounds.Min.Y) * dst.Stride - invertBytes(dst.Pix[p : p+width]) - } - } - - return nil -} - -// NewReader returns an io.Reader that decodes the CCITT-formatted data in r. -// The resultant byte stream is one bit per pixel (MSB first), with 1 meaning -// white and 0 meaning black. Each row in the result is byte-aligned. -// -// A negative height, such as passing AutoDetectHeight, means that the image -// height is not known in advance. A negative width is invalid. -func NewReader(r io.Reader, order Order, sf SubFormat, width int, height int, opts *Options) io.Reader { - readErr := error(nil) - if width < 0 { - readErr = errInvalidBounds - } else if width > maxWidth { - readErr = errUnsupportedWidth - } - - return &reader{ - br: bitReader{r: r, order: order}, - subFormat: sf, - align: (opts != nil) && opts.Align, - invert: (opts != nil) && opts.Invert, - width: width, - rowsRemaining: height, - readErr: readErr, - } -} diff --git a/vendor/golang.org/x/image/ccitt/table.go b/vendor/golang.org/x/image/ccitt/table.go deleted file mode 100644 index 8b3794bc2..000000000 --- a/vendor/golang.org/x/image/ccitt/table.go +++ /dev/null @@ -1,972 +0,0 @@ -// generated by "go run gen.go". DO NOT EDIT. - -package ccitt - -// Each decodeTable is represented by an array of [2]int16's: a binary tree. -// Each array element (other than element 0, which means invalid) is a branch -// node in that tree. The root node is always element 1 (the second element). -// -// To walk the tree, look at the next bit in the bit stream, using it to select -// the first or second element of the [2]int16. If that int16 is 0, we have an -// invalid code. If it is positive, go to that branch node. If it is negative, -// then we have a leaf node, whose value is the bitwise complement (the ^ -// operator) of that int16. -// -// Comments above each decodeTable also show the same structure visually. The -// "b123" lines show the 123'rd branch node. The "=XXXXX" lines show an invalid -// code. The "=v1234" lines show a leaf node with value 1234. When reading the -// bit stream, a 0 or 1 bit means to go up or down, as you move left to right. -// -// For example, in modeDecodeTable, branch node b005 is three steps up from the -// root node, meaning that we have already seen "000". If the next bit is "0" -// then we move to branch node b006. Otherwise, the next bit is "1", and we -// move to the leaf node v0000 (also known as the modePass constant). Indeed, -// the bits that encode modePass are "0001". -// -// Tables 1, 2 and 3 come from the "ITU-T Recommendation T.6: FACSIMILE CODING -// SCHEMES AND CODING CONTROL FUNCTIONS FOR GROUP 4 FACSIMILE APPARATUS" -// specification: -// -// https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-T.6-198811-I!!PDF-E&type=items - -// modeDecodeTable represents Table 1 and the End-of-Line code. -// -// +=XXXXX -// b009 +-+ -// | +=v0009 -// b007 +-+ -// | | +=v0008 -// b010 | +-+ -// | +=v0005 -// b006 +-+ -// | | +=v0007 -// b008 | +-+ -// | +=v0004 -// b005 +-+ -// | +=v0000 -// b003 +-+ -// | +=v0001 -// b002 +-+ -// | | +=v0006 -// b004 | +-+ -// | +=v0003 -// b001 +-+ -// +=v0002 -var modeDecodeTable = [...][2]int16{ - 0: {0, 0}, - 1: {2, ^2}, - 2: {3, 4}, - 3: {5, ^1}, - 4: {^6, ^3}, - 5: {6, ^0}, - 6: {7, 8}, - 7: {9, 10}, - 8: {^7, ^4}, - 9: {0, ^9}, - 10: {^8, ^5}, -} - -// whiteDecodeTable represents Tables 2 and 3 for a white run. -// -// +=XXXXX -// b059 +-+ -// | | +=v1792 -// b096 | | +-+ -// | | | | +=v1984 -// b100 | | | +-+ -// | | | +=v2048 -// b094 | | +-+ -// | | | | +=v2112 -// b101 | | | | +-+ -// | | | | | +=v2176 -// b097 | | | +-+ -// | | | | +=v2240 -// b102 | | | +-+ -// | | | +=v2304 -// b085 | +-+ -// | | +=v1856 -// b098 | | +-+ -// | | | +=v1920 -// b095 | +-+ -// | | +=v2368 -// b103 | | +-+ -// | | | +=v2432 -// b099 | +-+ -// | | +=v2496 -// b104 | +-+ -// | +=v2560 -// b040 +-+ -// | | +=v0029 -// b060 | +-+ -// | +=v0030 -// b026 +-+ -// | | +=v0045 -// b061 | | +-+ -// | | | +=v0046 -// b041 | +-+ -// | +=v0022 -// b016 +-+ -// | | +=v0023 -// b042 | | +-+ -// | | | | +=v0047 -// b062 | | | +-+ -// | | | +=v0048 -// b027 | +-+ -// | +=v0013 -// b008 +-+ -// | | +=v0020 -// b043 | | +-+ -// | | | | +=v0033 -// b063 | | | +-+ -// | | | +=v0034 -// b028 | | +-+ -// | | | | +=v0035 -// b064 | | | | +-+ -// | | | | | +=v0036 -// b044 | | | +-+ -// | | | | +=v0037 -// b065 | | | +-+ -// | | | +=v0038 -// b017 | +-+ -// | | +=v0019 -// b045 | | +-+ -// | | | | +=v0031 -// b066 | | | +-+ -// | | | +=v0032 -// b029 | +-+ -// | +=v0001 -// b004 +-+ -// | | +=v0012 -// b030 | | +-+ -// | | | | +=v0053 -// b067 | | | | +-+ -// | | | | | +=v0054 -// b046 | | | +-+ -// | | | +=v0026 -// b018 | | +-+ -// | | | | +=v0039 -// b068 | | | | +-+ -// | | | | | +=v0040 -// b047 | | | | +-+ -// | | | | | | +=v0041 -// b069 | | | | | +-+ -// | | | | | +=v0042 -// b031 | | | +-+ -// | | | | +=v0043 -// b070 | | | | +-+ -// | | | | | +=v0044 -// b048 | | | +-+ -// | | | +=v0021 -// b009 | +-+ -// | | +=v0028 -// b049 | | +-+ -// | | | | +=v0061 -// b071 | | | +-+ -// | | | +=v0062 -// b032 | | +-+ -// | | | | +=v0063 -// b072 | | | | +-+ -// | | | | | +=v0000 -// b050 | | | +-+ -// | | | | +=v0320 -// b073 | | | +-+ -// | | | +=v0384 -// b019 | +-+ -// | +=v0010 -// b002 +-+ -// | | +=v0011 -// b020 | | +-+ -// | | | | +=v0027 -// b051 | | | | +-+ -// | | | | | | +=v0059 -// b074 | | | | | +-+ -// | | | | | +=v0060 -// b033 | | | +-+ -// | | | | +=v1472 -// b086 | | | | +-+ -// | | | | | +=v1536 -// b075 | | | | +-+ -// | | | | | | +=v1600 -// b087 | | | | | +-+ -// | | | | | +=v1728 -// b052 | | | +-+ -// | | | +=v0018 -// b010 | | +-+ -// | | | | +=v0024 -// b053 | | | | +-+ -// | | | | | | +=v0049 -// b076 | | | | | +-+ -// | | | | | +=v0050 -// b034 | | | | +-+ -// | | | | | | +=v0051 -// b077 | | | | | | +-+ -// | | | | | | | +=v0052 -// b054 | | | | | +-+ -// | | | | | +=v0025 -// b021 | | | +-+ -// | | | | +=v0055 -// b078 | | | | +-+ -// | | | | | +=v0056 -// b055 | | | | +-+ -// | | | | | | +=v0057 -// b079 | | | | | +-+ -// | | | | | +=v0058 -// b035 | | | +-+ -// | | | +=v0192 -// b005 | +-+ -// | | +=v1664 -// b036 | | +-+ -// | | | | +=v0448 -// b080 | | | | +-+ -// | | | | | +=v0512 -// b056 | | | +-+ -// | | | | +=v0704 -// b088 | | | | +-+ -// | | | | | +=v0768 -// b081 | | | +-+ -// | | | +=v0640 -// b022 | | +-+ -// | | | | +=v0576 -// b082 | | | | +-+ -// | | | | | | +=v0832 -// b089 | | | | | +-+ -// | | | | | +=v0896 -// b057 | | | | +-+ -// | | | | | | +=v0960 -// b090 | | | | | | +-+ -// | | | | | | | +=v1024 -// b083 | | | | | +-+ -// | | | | | | +=v1088 -// b091 | | | | | +-+ -// | | | | | +=v1152 -// b037 | | | +-+ -// | | | | +=v1216 -// b092 | | | | +-+ -// | | | | | +=v1280 -// b084 | | | | +-+ -// | | | | | | +=v1344 -// b093 | | | | | +-+ -// | | | | | +=v1408 -// b058 | | | +-+ -// | | | +=v0256 -// b011 | +-+ -// | +=v0002 -// b001 +-+ -// | +=v0003 -// b012 | +-+ -// | | | +=v0128 -// b023 | | +-+ -// | | +=v0008 -// b006 | +-+ -// | | | +=v0009 -// b024 | | | +-+ -// | | | | | +=v0016 -// b038 | | | | +-+ -// | | | | +=v0017 -// b013 | | +-+ -// | | +=v0004 -// b003 +-+ -// | +=v0005 -// b014 | +-+ -// | | | +=v0014 -// b039 | | | +-+ -// | | | | +=v0015 -// b025 | | +-+ -// | | +=v0064 -// b007 +-+ -// | +=v0006 -// b015 +-+ -// +=v0007 -var whiteDecodeTable = [...][2]int16{ - 0: {0, 0}, - 1: {2, 3}, - 2: {4, 5}, - 3: {6, 7}, - 4: {8, 9}, - 5: {10, 11}, - 6: {12, 13}, - 7: {14, 15}, - 8: {16, 17}, - 9: {18, 19}, - 10: {20, 21}, - 11: {22, ^2}, - 12: {^3, 23}, - 13: {24, ^4}, - 14: {^5, 25}, - 15: {^6, ^7}, - 16: {26, 27}, - 17: {28, 29}, - 18: {30, 31}, - 19: {32, ^10}, - 20: {^11, 33}, - 21: {34, 35}, - 22: {36, 37}, - 23: {^128, ^8}, - 24: {^9, 38}, - 25: {39, ^64}, - 26: {40, 41}, - 27: {42, ^13}, - 28: {43, 44}, - 29: {45, ^1}, - 30: {^12, 46}, - 31: {47, 48}, - 32: {49, 50}, - 33: {51, 52}, - 34: {53, 54}, - 35: {55, ^192}, - 36: {^1664, 56}, - 37: {57, 58}, - 38: {^16, ^17}, - 39: {^14, ^15}, - 40: {59, 60}, - 41: {61, ^22}, - 42: {^23, 62}, - 43: {^20, 63}, - 44: {64, 65}, - 45: {^19, 66}, - 46: {67, ^26}, - 47: {68, 69}, - 48: {70, ^21}, - 49: {^28, 71}, - 50: {72, 73}, - 51: {^27, 74}, - 52: {75, ^18}, - 53: {^24, 76}, - 54: {77, ^25}, - 55: {78, 79}, - 56: {80, 81}, - 57: {82, 83}, - 58: {84, ^256}, - 59: {0, 85}, - 60: {^29, ^30}, - 61: {^45, ^46}, - 62: {^47, ^48}, - 63: {^33, ^34}, - 64: {^35, ^36}, - 65: {^37, ^38}, - 66: {^31, ^32}, - 67: {^53, ^54}, - 68: {^39, ^40}, - 69: {^41, ^42}, - 70: {^43, ^44}, - 71: {^61, ^62}, - 72: {^63, ^0}, - 73: {^320, ^384}, - 74: {^59, ^60}, - 75: {86, 87}, - 76: {^49, ^50}, - 77: {^51, ^52}, - 78: {^55, ^56}, - 79: {^57, ^58}, - 80: {^448, ^512}, - 81: {88, ^640}, - 82: {^576, 89}, - 83: {90, 91}, - 84: {92, 93}, - 85: {94, 95}, - 86: {^1472, ^1536}, - 87: {^1600, ^1728}, - 88: {^704, ^768}, - 89: {^832, ^896}, - 90: {^960, ^1024}, - 91: {^1088, ^1152}, - 92: {^1216, ^1280}, - 93: {^1344, ^1408}, - 94: {96, 97}, - 95: {98, 99}, - 96: {^1792, 100}, - 97: {101, 102}, - 98: {^1856, ^1920}, - 99: {103, 104}, - 100: {^1984, ^2048}, - 101: {^2112, ^2176}, - 102: {^2240, ^2304}, - 103: {^2368, ^2432}, - 104: {^2496, ^2560}, -} - -// blackDecodeTable represents Tables 2 and 3 for a black run. -// -// +=XXXXX -// b017 +-+ -// | | +=v1792 -// b042 | | +-+ -// | | | | +=v1984 -// b063 | | | +-+ -// | | | +=v2048 -// b029 | | +-+ -// | | | | +=v2112 -// b064 | | | | +-+ -// | | | | | +=v2176 -// b043 | | | +-+ -// | | | | +=v2240 -// b065 | | | +-+ -// | | | +=v2304 -// b022 | +-+ -// | | +=v1856 -// b044 | | +-+ -// | | | +=v1920 -// b030 | +-+ -// | | +=v2368 -// b066 | | +-+ -// | | | +=v2432 -// b045 | +-+ -// | | +=v2496 -// b067 | +-+ -// | +=v2560 -// b013 +-+ -// | | +=v0018 -// b031 | | +-+ -// | | | | +=v0052 -// b068 | | | | +-+ -// | | | | | | +=v0640 -// b095 | | | | | +-+ -// | | | | | +=v0704 -// b046 | | | +-+ -// | | | | +=v0768 -// b096 | | | | +-+ -// | | | | | +=v0832 -// b069 | | | +-+ -// | | | +=v0055 -// b023 | | +-+ -// | | | | +=v0056 -// b070 | | | | +-+ -// | | | | | | +=v1280 -// b097 | | | | | +-+ -// | | | | | +=v1344 -// b047 | | | | +-+ -// | | | | | | +=v1408 -// b098 | | | | | | +-+ -// | | | | | | | +=v1472 -// b071 | | | | | +-+ -// | | | | | +=v0059 -// b032 | | | +-+ -// | | | | +=v0060 -// b072 | | | | +-+ -// | | | | | | +=v1536 -// b099 | | | | | +-+ -// | | | | | +=v1600 -// b048 | | | +-+ -// | | | +=v0024 -// b018 | +-+ -// | | +=v0025 -// b049 | | +-+ -// | | | | +=v1664 -// b100 | | | | +-+ -// | | | | | +=v1728 -// b073 | | | +-+ -// | | | +=v0320 -// b033 | | +-+ -// | | | | +=v0384 -// b074 | | | | +-+ -// | | | | | +=v0448 -// b050 | | | +-+ -// | | | | +=v0512 -// b101 | | | | +-+ -// | | | | | +=v0576 -// b075 | | | +-+ -// | | | +=v0053 -// b024 | +-+ -// | | +=v0054 -// b076 | | +-+ -// | | | | +=v0896 -// b102 | | | +-+ -// | | | +=v0960 -// b051 | | +-+ -// | | | | +=v1024 -// b103 | | | | +-+ -// | | | | | +=v1088 -// b077 | | | +-+ -// | | | | +=v1152 -// b104 | | | +-+ -// | | | +=v1216 -// b034 | +-+ -// | +=v0064 -// b010 +-+ -// | | +=v0013 -// b019 | | +-+ -// | | | | +=v0023 -// b052 | | | | +-+ -// | | | | | | +=v0050 -// b078 | | | | | +-+ -// | | | | | +=v0051 -// b035 | | | | +-+ -// | | | | | | +=v0044 -// b079 | | | | | | +-+ -// | | | | | | | +=v0045 -// b053 | | | | | +-+ -// | | | | | | +=v0046 -// b080 | | | | | +-+ -// | | | | | +=v0047 -// b025 | | | +-+ -// | | | | +=v0057 -// b081 | | | | +-+ -// | | | | | +=v0058 -// b054 | | | | +-+ -// | | | | | | +=v0061 -// b082 | | | | | +-+ -// | | | | | +=v0256 -// b036 | | | +-+ -// | | | +=v0016 -// b014 | +-+ -// | | +=v0017 -// b037 | | +-+ -// | | | | +=v0048 -// b083 | | | | +-+ -// | | | | | +=v0049 -// b055 | | | +-+ -// | | | | +=v0062 -// b084 | | | +-+ -// | | | +=v0063 -// b026 | | +-+ -// | | | | +=v0030 -// b085 | | | | +-+ -// | | | | | +=v0031 -// b056 | | | | +-+ -// | | | | | | +=v0032 -// b086 | | | | | +-+ -// | | | | | +=v0033 -// b038 | | | +-+ -// | | | | +=v0040 -// b087 | | | | +-+ -// | | | | | +=v0041 -// b057 | | | +-+ -// | | | +=v0022 -// b020 | +-+ -// | +=v0014 -// b008 +-+ -// | | +=v0010 -// b015 | | +-+ -// | | | +=v0011 -// b011 | +-+ -// | | +=v0015 -// b027 | | +-+ -// | | | | +=v0128 -// b088 | | | | +-+ -// | | | | | +=v0192 -// b058 | | | | +-+ -// | | | | | | +=v0026 -// b089 | | | | | +-+ -// | | | | | +=v0027 -// b039 | | | +-+ -// | | | | +=v0028 -// b090 | | | | +-+ -// | | | | | +=v0029 -// b059 | | | +-+ -// | | | +=v0019 -// b021 | | +-+ -// | | | | +=v0020 -// b060 | | | | +-+ -// | | | | | | +=v0034 -// b091 | | | | | +-+ -// | | | | | +=v0035 -// b040 | | | | +-+ -// | | | | | | +=v0036 -// b092 | | | | | | +-+ -// | | | | | | | +=v0037 -// b061 | | | | | +-+ -// | | | | | | +=v0038 -// b093 | | | | | +-+ -// | | | | | +=v0039 -// b028 | | | +-+ -// | | | | +=v0021 -// b062 | | | | +-+ -// | | | | | | +=v0042 -// b094 | | | | | +-+ -// | | | | | +=v0043 -// b041 | | | +-+ -// | | | +=v0000 -// b016 | +-+ -// | +=v0012 -// b006 +-+ -// | | +=v0009 -// b012 | | +-+ -// | | | +=v0008 -// b009 | +-+ -// | +=v0007 -// b004 +-+ -// | | +=v0006 -// b007 | +-+ -// | +=v0005 -// b002 +-+ -// | | +=v0001 -// b005 | +-+ -// | +=v0004 -// b001 +-+ -// | +=v0003 -// b003 +-+ -// +=v0002 -var blackDecodeTable = [...][2]int16{ - 0: {0, 0}, - 1: {2, 3}, - 2: {4, 5}, - 3: {^3, ^2}, - 4: {6, 7}, - 5: {^1, ^4}, - 6: {8, 9}, - 7: {^6, ^5}, - 8: {10, 11}, - 9: {12, ^7}, - 10: {13, 14}, - 11: {15, 16}, - 12: {^9, ^8}, - 13: {17, 18}, - 14: {19, 20}, - 15: {^10, ^11}, - 16: {21, ^12}, - 17: {0, 22}, - 18: {23, 24}, - 19: {^13, 25}, - 20: {26, ^14}, - 21: {27, 28}, - 22: {29, 30}, - 23: {31, 32}, - 24: {33, 34}, - 25: {35, 36}, - 26: {37, 38}, - 27: {^15, 39}, - 28: {40, 41}, - 29: {42, 43}, - 30: {44, 45}, - 31: {^18, 46}, - 32: {47, 48}, - 33: {49, 50}, - 34: {51, ^64}, - 35: {52, 53}, - 36: {54, ^16}, - 37: {^17, 55}, - 38: {56, 57}, - 39: {58, 59}, - 40: {60, 61}, - 41: {62, ^0}, - 42: {^1792, 63}, - 43: {64, 65}, - 44: {^1856, ^1920}, - 45: {66, 67}, - 46: {68, 69}, - 47: {70, 71}, - 48: {72, ^24}, - 49: {^25, 73}, - 50: {74, 75}, - 51: {76, 77}, - 52: {^23, 78}, - 53: {79, 80}, - 54: {81, 82}, - 55: {83, 84}, - 56: {85, 86}, - 57: {87, ^22}, - 58: {88, 89}, - 59: {90, ^19}, - 60: {^20, 91}, - 61: {92, 93}, - 62: {^21, 94}, - 63: {^1984, ^2048}, - 64: {^2112, ^2176}, - 65: {^2240, ^2304}, - 66: {^2368, ^2432}, - 67: {^2496, ^2560}, - 68: {^52, 95}, - 69: {96, ^55}, - 70: {^56, 97}, - 71: {98, ^59}, - 72: {^60, 99}, - 73: {100, ^320}, - 74: {^384, ^448}, - 75: {101, ^53}, - 76: {^54, 102}, - 77: {103, 104}, - 78: {^50, ^51}, - 79: {^44, ^45}, - 80: {^46, ^47}, - 81: {^57, ^58}, - 82: {^61, ^256}, - 83: {^48, ^49}, - 84: {^62, ^63}, - 85: {^30, ^31}, - 86: {^32, ^33}, - 87: {^40, ^41}, - 88: {^128, ^192}, - 89: {^26, ^27}, - 90: {^28, ^29}, - 91: {^34, ^35}, - 92: {^36, ^37}, - 93: {^38, ^39}, - 94: {^42, ^43}, - 95: {^640, ^704}, - 96: {^768, ^832}, - 97: {^1280, ^1344}, - 98: {^1408, ^1472}, - 99: {^1536, ^1600}, - 100: {^1664, ^1728}, - 101: {^512, ^576}, - 102: {^896, ^960}, - 103: {^1024, ^1088}, - 104: {^1152, ^1216}, -} - -const maxCodeLength = 13 - -// Each encodeTable is represented by an array of bitStrings. - -// bitString is a pair of uint32 values representing a bit code. -// The nBits low bits of bits make up the actual bit code. -// Eg. bitString{0x0004, 8} represents the bitcode "00000100". -type bitString struct { - bits uint32 - nBits uint32 -} - -// modeEncodeTable represents Table 1 and the End-of-Line code. -var modeEncodeTable = [...]bitString{ - 0: {0x0001, 4}, // "0001" - 1: {0x0001, 3}, // "001" - 2: {0x0001, 1}, // "1" - 3: {0x0003, 3}, // "011" - 4: {0x0003, 6}, // "000011" - 5: {0x0003, 7}, // "0000011" - 6: {0x0002, 3}, // "010" - 7: {0x0002, 6}, // "000010" - 8: {0x0002, 7}, // "0000010" - 9: {0x0001, 7}, // "0000001" -} - -// whiteEncodeTable2 represents Table 2 for a white run. -var whiteEncodeTable2 = [...]bitString{ - 0: {0x0035, 8}, // "00110101" - 1: {0x0007, 6}, // "000111" - 2: {0x0007, 4}, // "0111" - 3: {0x0008, 4}, // "1000" - 4: {0x000b, 4}, // "1011" - 5: {0x000c, 4}, // "1100" - 6: {0x000e, 4}, // "1110" - 7: {0x000f, 4}, // "1111" - 8: {0x0013, 5}, // "10011" - 9: {0x0014, 5}, // "10100" - 10: {0x0007, 5}, // "00111" - 11: {0x0008, 5}, // "01000" - 12: {0x0008, 6}, // "001000" - 13: {0x0003, 6}, // "000011" - 14: {0x0034, 6}, // "110100" - 15: {0x0035, 6}, // "110101" - 16: {0x002a, 6}, // "101010" - 17: {0x002b, 6}, // "101011" - 18: {0x0027, 7}, // "0100111" - 19: {0x000c, 7}, // "0001100" - 20: {0x0008, 7}, // "0001000" - 21: {0x0017, 7}, // "0010111" - 22: {0x0003, 7}, // "0000011" - 23: {0x0004, 7}, // "0000100" - 24: {0x0028, 7}, // "0101000" - 25: {0x002b, 7}, // "0101011" - 26: {0x0013, 7}, // "0010011" - 27: {0x0024, 7}, // "0100100" - 28: {0x0018, 7}, // "0011000" - 29: {0x0002, 8}, // "00000010" - 30: {0x0003, 8}, // "00000011" - 31: {0x001a, 8}, // "00011010" - 32: {0x001b, 8}, // "00011011" - 33: {0x0012, 8}, // "00010010" - 34: {0x0013, 8}, // "00010011" - 35: {0x0014, 8}, // "00010100" - 36: {0x0015, 8}, // "00010101" - 37: {0x0016, 8}, // "00010110" - 38: {0x0017, 8}, // "00010111" - 39: {0x0028, 8}, // "00101000" - 40: {0x0029, 8}, // "00101001" - 41: {0x002a, 8}, // "00101010" - 42: {0x002b, 8}, // "00101011" - 43: {0x002c, 8}, // "00101100" - 44: {0x002d, 8}, // "00101101" - 45: {0x0004, 8}, // "00000100" - 46: {0x0005, 8}, // "00000101" - 47: {0x000a, 8}, // "00001010" - 48: {0x000b, 8}, // "00001011" - 49: {0x0052, 8}, // "01010010" - 50: {0x0053, 8}, // "01010011" - 51: {0x0054, 8}, // "01010100" - 52: {0x0055, 8}, // "01010101" - 53: {0x0024, 8}, // "00100100" - 54: {0x0025, 8}, // "00100101" - 55: {0x0058, 8}, // "01011000" - 56: {0x0059, 8}, // "01011001" - 57: {0x005a, 8}, // "01011010" - 58: {0x005b, 8}, // "01011011" - 59: {0x004a, 8}, // "01001010" - 60: {0x004b, 8}, // "01001011" - 61: {0x0032, 8}, // "00110010" - 62: {0x0033, 8}, // "00110011" - 63: {0x0034, 8}, // "00110100" -} - -// whiteEncodeTable3 represents Table 3 for a white run. -var whiteEncodeTable3 = [...]bitString{ - 0: {0x001b, 5}, // "11011" - 1: {0x0012, 5}, // "10010" - 2: {0x0017, 6}, // "010111" - 3: {0x0037, 7}, // "0110111" - 4: {0x0036, 8}, // "00110110" - 5: {0x0037, 8}, // "00110111" - 6: {0x0064, 8}, // "01100100" - 7: {0x0065, 8}, // "01100101" - 8: {0x0068, 8}, // "01101000" - 9: {0x0067, 8}, // "01100111" - 10: {0x00cc, 9}, // "011001100" - 11: {0x00cd, 9}, // "011001101" - 12: {0x00d2, 9}, // "011010010" - 13: {0x00d3, 9}, // "011010011" - 14: {0x00d4, 9}, // "011010100" - 15: {0x00d5, 9}, // "011010101" - 16: {0x00d6, 9}, // "011010110" - 17: {0x00d7, 9}, // "011010111" - 18: {0x00d8, 9}, // "011011000" - 19: {0x00d9, 9}, // "011011001" - 20: {0x00da, 9}, // "011011010" - 21: {0x00db, 9}, // "011011011" - 22: {0x0098, 9}, // "010011000" - 23: {0x0099, 9}, // "010011001" - 24: {0x009a, 9}, // "010011010" - 25: {0x0018, 6}, // "011000" - 26: {0x009b, 9}, // "010011011" - 27: {0x0008, 11}, // "00000001000" - 28: {0x000c, 11}, // "00000001100" - 29: {0x000d, 11}, // "00000001101" - 30: {0x0012, 12}, // "000000010010" - 31: {0x0013, 12}, // "000000010011" - 32: {0x0014, 12}, // "000000010100" - 33: {0x0015, 12}, // "000000010101" - 34: {0x0016, 12}, // "000000010110" - 35: {0x0017, 12}, // "000000010111" - 36: {0x001c, 12}, // "000000011100" - 37: {0x001d, 12}, // "000000011101" - 38: {0x001e, 12}, // "000000011110" - 39: {0x001f, 12}, // "000000011111" -} - -// blackEncodeTable2 represents Table 2 for a black run. -var blackEncodeTable2 = [...]bitString{ - 0: {0x0037, 10}, // "0000110111" - 1: {0x0002, 3}, // "010" - 2: {0x0003, 2}, // "11" - 3: {0x0002, 2}, // "10" - 4: {0x0003, 3}, // "011" - 5: {0x0003, 4}, // "0011" - 6: {0x0002, 4}, // "0010" - 7: {0x0003, 5}, // "00011" - 8: {0x0005, 6}, // "000101" - 9: {0x0004, 6}, // "000100" - 10: {0x0004, 7}, // "0000100" - 11: {0x0005, 7}, // "0000101" - 12: {0x0007, 7}, // "0000111" - 13: {0x0004, 8}, // "00000100" - 14: {0x0007, 8}, // "00000111" - 15: {0x0018, 9}, // "000011000" - 16: {0x0017, 10}, // "0000010111" - 17: {0x0018, 10}, // "0000011000" - 18: {0x0008, 10}, // "0000001000" - 19: {0x0067, 11}, // "00001100111" - 20: {0x0068, 11}, // "00001101000" - 21: {0x006c, 11}, // "00001101100" - 22: {0x0037, 11}, // "00000110111" - 23: {0x0028, 11}, // "00000101000" - 24: {0x0017, 11}, // "00000010111" - 25: {0x0018, 11}, // "00000011000" - 26: {0x00ca, 12}, // "000011001010" - 27: {0x00cb, 12}, // "000011001011" - 28: {0x00cc, 12}, // "000011001100" - 29: {0x00cd, 12}, // "000011001101" - 30: {0x0068, 12}, // "000001101000" - 31: {0x0069, 12}, // "000001101001" - 32: {0x006a, 12}, // "000001101010" - 33: {0x006b, 12}, // "000001101011" - 34: {0x00d2, 12}, // "000011010010" - 35: {0x00d3, 12}, // "000011010011" - 36: {0x00d4, 12}, // "000011010100" - 37: {0x00d5, 12}, // "000011010101" - 38: {0x00d6, 12}, // "000011010110" - 39: {0x00d7, 12}, // "000011010111" - 40: {0x006c, 12}, // "000001101100" - 41: {0x006d, 12}, // "000001101101" - 42: {0x00da, 12}, // "000011011010" - 43: {0x00db, 12}, // "000011011011" - 44: {0x0054, 12}, // "000001010100" - 45: {0x0055, 12}, // "000001010101" - 46: {0x0056, 12}, // "000001010110" - 47: {0x0057, 12}, // "000001010111" - 48: {0x0064, 12}, // "000001100100" - 49: {0x0065, 12}, // "000001100101" - 50: {0x0052, 12}, // "000001010010" - 51: {0x0053, 12}, // "000001010011" - 52: {0x0024, 12}, // "000000100100" - 53: {0x0037, 12}, // "000000110111" - 54: {0x0038, 12}, // "000000111000" - 55: {0x0027, 12}, // "000000100111" - 56: {0x0028, 12}, // "000000101000" - 57: {0x0058, 12}, // "000001011000" - 58: {0x0059, 12}, // "000001011001" - 59: {0x002b, 12}, // "000000101011" - 60: {0x002c, 12}, // "000000101100" - 61: {0x005a, 12}, // "000001011010" - 62: {0x0066, 12}, // "000001100110" - 63: {0x0067, 12}, // "000001100111" -} - -// blackEncodeTable3 represents Table 3 for a black run. -var blackEncodeTable3 = [...]bitString{ - 0: {0x000f, 10}, // "0000001111" - 1: {0x00c8, 12}, // "000011001000" - 2: {0x00c9, 12}, // "000011001001" - 3: {0x005b, 12}, // "000001011011" - 4: {0x0033, 12}, // "000000110011" - 5: {0x0034, 12}, // "000000110100" - 6: {0x0035, 12}, // "000000110101" - 7: {0x006c, 13}, // "0000001101100" - 8: {0x006d, 13}, // "0000001101101" - 9: {0x004a, 13}, // "0000001001010" - 10: {0x004b, 13}, // "0000001001011" - 11: {0x004c, 13}, // "0000001001100" - 12: {0x004d, 13}, // "0000001001101" - 13: {0x0072, 13}, // "0000001110010" - 14: {0x0073, 13}, // "0000001110011" - 15: {0x0074, 13}, // "0000001110100" - 16: {0x0075, 13}, // "0000001110101" - 17: {0x0076, 13}, // "0000001110110" - 18: {0x0077, 13}, // "0000001110111" - 19: {0x0052, 13}, // "0000001010010" - 20: {0x0053, 13}, // "0000001010011" - 21: {0x0054, 13}, // "0000001010100" - 22: {0x0055, 13}, // "0000001010101" - 23: {0x005a, 13}, // "0000001011010" - 24: {0x005b, 13}, // "0000001011011" - 25: {0x0064, 13}, // "0000001100100" - 26: {0x0065, 13}, // "0000001100101" - 27: {0x0008, 11}, // "00000001000" - 28: {0x000c, 11}, // "00000001100" - 29: {0x000d, 11}, // "00000001101" - 30: {0x0012, 12}, // "000000010010" - 31: {0x0013, 12}, // "000000010011" - 32: {0x0014, 12}, // "000000010100" - 33: {0x0015, 12}, // "000000010101" - 34: {0x0016, 12}, // "000000010110" - 35: {0x0017, 12}, // "000000010111" - 36: {0x001c, 12}, // "000000011100" - 37: {0x001d, 12}, // "000000011101" - 38: {0x001e, 12}, // "000000011110" - 39: {0x001f, 12}, // "000000011111" -} - -// COPY PASTE table.go BEGIN - -const ( - modePass = iota // Pass - modeH // Horizontal - modeV0 // Vertical-0 - modeVR1 // Vertical-Right-1 - modeVR2 // Vertical-Right-2 - modeVR3 // Vertical-Right-3 - modeVL1 // Vertical-Left-1 - modeVL2 // Vertical-Left-2 - modeVL3 // Vertical-Left-3 - modeExt // Extension -) - -// COPY PASTE table.go END diff --git a/vendor/golang.org/x/image/ccitt/writer.go b/vendor/golang.org/x/image/ccitt/writer.go deleted file mode 100644 index 87130ab04..000000000 --- a/vendor/golang.org/x/image/ccitt/writer.go +++ /dev/null @@ -1,102 +0,0 @@ -// Copyright 2019 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package ccitt - -import ( - "encoding/binary" - "io" -) - -type bitWriter struct { - w io.Writer - - // order is whether to process w's bytes LSB first or MSB first. - order Order - - // The high nBits bits of the bits field hold encoded bits to be written to w. - bits uint64 - nBits uint32 - - // bytes[:bw] holds encoded bytes not yet written to w. - // Overflow protection is ensured by using a multiple of 8 as bytes length. - bw uint32 - bytes [1024]uint8 -} - -// flushBits copies 64 bits from b.bits to b.bytes. If b.bytes is then full, it -// is written to b.w. -func (b *bitWriter) flushBits() error { - binary.BigEndian.PutUint64(b.bytes[b.bw:], b.bits) - b.bits = 0 - b.nBits = 0 - b.bw += 8 - if b.bw < uint32(len(b.bytes)) { - return nil - } - b.bw = 0 - if b.order != MSB { - reverseBitsWithinBytes(b.bytes[:]) - } - _, err := b.w.Write(b.bytes[:]) - return err -} - -// close finalizes a bitcode stream by writing any -// pending bits to bitWriter's underlying io.Writer. -func (b *bitWriter) close() error { - // Write any encoded bits to bytes. - if b.nBits > 0 { - binary.BigEndian.PutUint64(b.bytes[b.bw:], b.bits) - b.bw += (b.nBits + 7) >> 3 - } - - if b.order != MSB { - reverseBitsWithinBytes(b.bytes[:b.bw]) - } - - // Write b.bw bytes to b.w. - _, err := b.w.Write(b.bytes[:b.bw]) - return err -} - -// alignToByteBoundary rounds b.nBits up to a multiple of 8. -// If all 64 bits are used, flush them to bitWriter's bytes. -func (b *bitWriter) alignToByteBoundary() error { - if b.nBits = (b.nBits + 7) &^ 7; b.nBits == 64 { - return b.flushBits() - } - return nil -} - -// writeCode writes a variable length bitcode to b's underlying io.Writer. -func (b *bitWriter) writeCode(bs bitString) error { - bits := bs.bits - nBits := bs.nBits - if 64-b.nBits >= nBits { - // b.bits has sufficient room for storing nBits bits. - b.bits |= uint64(bits) << (64 - nBits - b.nBits) - b.nBits += nBits - if b.nBits == 64 { - return b.flushBits() - } - return nil - } - - // Number of leading bits that fill b.bits. - i := 64 - b.nBits - - // Fill b.bits then flush and write remaining bits. - b.bits |= uint64(bits) >> (nBits - i) - b.nBits = 64 - - if err := b.flushBits(); err != nil { - return err - } - - nBits -= i - b.bits = uint64(bits) << (64 - nBits) - b.nBits = nBits - return nil -} diff --git a/vendor/golang.org/x/image/tiff/buffer.go b/vendor/golang.org/x/image/tiff/buffer.go deleted file mode 100644 index d1801be48..000000000 --- a/vendor/golang.org/x/image/tiff/buffer.go +++ /dev/null @@ -1,69 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package tiff - -import "io" - -// buffer buffers an io.Reader to satisfy io.ReaderAt. -type buffer struct { - r io.Reader - buf []byte -} - -// fill reads data from b.r until the buffer contains at least end bytes. -func (b *buffer) fill(end int) error { - m := len(b.buf) - if end > m { - if end > cap(b.buf) { - newcap := 1024 - for newcap < end { - newcap *= 2 - } - newbuf := make([]byte, end, newcap) - copy(newbuf, b.buf) - b.buf = newbuf - } else { - b.buf = b.buf[:end] - } - if n, err := io.ReadFull(b.r, b.buf[m:end]); err != nil { - end = m + n - b.buf = b.buf[:end] - return err - } - } - return nil -} - -func (b *buffer) ReadAt(p []byte, off int64) (int, error) { - o := int(off) - end := o + len(p) - if int64(end) != off+int64(len(p)) { - return 0, io.ErrUnexpectedEOF - } - - err := b.fill(end) - return copy(p, b.buf[o:end]), err -} - -// Slice returns a slice of the underlying buffer. The slice contains -// n bytes starting at offset off. -func (b *buffer) Slice(off, n int) ([]byte, error) { - end := off + n - if err := b.fill(end); err != nil { - return nil, err - } - return b.buf[off:end], nil -} - -// newReaderAt converts an io.Reader into an io.ReaderAt. -func newReaderAt(r io.Reader) io.ReaderAt { - if ra, ok := r.(io.ReaderAt); ok { - return ra - } - return &buffer{ - r: r, - buf: make([]byte, 0, 1024), - } -} diff --git a/vendor/golang.org/x/image/tiff/compress.go b/vendor/golang.org/x/image/tiff/compress.go deleted file mode 100644 index 3f176f00a..000000000 --- a/vendor/golang.org/x/image/tiff/compress.go +++ /dev/null @@ -1,58 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package tiff - -import ( - "bufio" - "io" -) - -type byteReader interface { - io.Reader - io.ByteReader -} - -// unpackBits decodes the PackBits-compressed data in src and returns the -// uncompressed data. -// -// The PackBits compression format is described in section 9 (p. 42) -// of the TIFF spec. -func unpackBits(r io.Reader) ([]byte, error) { - buf := make([]byte, 128) - dst := make([]byte, 0, 1024) - br, ok := r.(byteReader) - if !ok { - br = bufio.NewReader(r) - } - - for { - b, err := br.ReadByte() - if err != nil { - if err == io.EOF { - return dst, nil - } - return nil, err - } - code := int(int8(b)) - switch { - case code >= 0: - n, err := io.ReadFull(br, buf[:code+1]) - if err != nil { - return nil, err - } - dst = append(dst, buf[:n]...) - case code == -128: - // No-op. - default: - if b, err = br.ReadByte(); err != nil { - return nil, err - } - for j := 0; j < 1-code; j++ { - buf[j] = b - } - dst = append(dst, buf[:1-code]...) - } - } -} diff --git a/vendor/golang.org/x/image/tiff/consts.go b/vendor/golang.org/x/image/tiff/consts.go deleted file mode 100644 index 3e5f7f14d..000000000 --- a/vendor/golang.org/x/image/tiff/consts.go +++ /dev/null @@ -1,149 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package tiff - -// A tiff image file contains one or more images. The metadata -// of each image is contained in an Image File Directory (IFD), -// which contains entries of 12 bytes each and is described -// on page 14-16 of the specification. An IFD entry consists of -// -// - a tag, which describes the signification of the entry, -// - the data type and length of the entry, -// - the data itself or a pointer to it if it is more than 4 bytes. -// -// The presence of a length means that each IFD is effectively an array. - -const ( - leHeader = "II\x2A\x00" // Header for little-endian files. - beHeader = "MM\x00\x2A" // Header for big-endian files. - - ifdLen = 12 // Length of an IFD entry in bytes. -) - -// Data types (p. 14-16 of the spec). -const ( - dtByte = 1 - dtASCII = 2 - dtShort = 3 - dtLong = 4 - dtRational = 5 -) - -// The length of one instance of each data type in bytes. -var lengths = [...]uint32{0, 1, 1, 2, 4, 8} - -// Tags (see p. 28-41 of the spec). -const ( - tImageWidth = 256 - tImageLength = 257 - tBitsPerSample = 258 - tCompression = 259 - tPhotometricInterpretation = 262 - - tFillOrder = 266 - - tStripOffsets = 273 - tSamplesPerPixel = 277 - tRowsPerStrip = 278 - tStripByteCounts = 279 - - tT4Options = 292 // CCITT Group 3 options, a set of 32 flag bits. - tT6Options = 293 // CCITT Group 4 options, a set of 32 flag bits. - - tTileWidth = 322 - tTileLength = 323 - tTileOffsets = 324 - tTileByteCounts = 325 - - tXResolution = 282 - tYResolution = 283 - tResolutionUnit = 296 - - tPredictor = 317 - tColorMap = 320 - tExtraSamples = 338 - tSampleFormat = 339 -) - -// Compression types (defined in various places in the spec and supplements). -const ( - cNone = 1 - cCCITT = 2 - cG3 = 3 // Group 3 Fax. - cG4 = 4 // Group 4 Fax. - cLZW = 5 - cJPEGOld = 6 // Superseded by cJPEG. - cJPEG = 7 - cDeflate = 8 // zlib compression. - cPackBits = 32773 - cDeflateOld = 32946 // Superseded by cDeflate. -) - -// Photometric interpretation values (see p. 37 of the spec). -const ( - pWhiteIsZero = 0 - pBlackIsZero = 1 - pRGB = 2 - pPaletted = 3 - pTransMask = 4 // transparency mask - pCMYK = 5 - pYCbCr = 6 - pCIELab = 8 -) - -// Values for the tPredictor tag (page 64-65 of the spec). -const ( - prNone = 1 - prHorizontal = 2 -) - -// Values for the tResolutionUnit tag (page 18). -const ( - resNone = 1 - resPerInch = 2 // Dots per inch. - resPerCM = 3 // Dots per centimeter. -) - -// imageMode represents the mode of the image. -type imageMode int - -const ( - mBilevel imageMode = iota - mPaletted - mGray - mGrayInvert - mRGB - mRGBA - mNRGBA - mCMYK -) - -// CompressionType describes the type of compression used in Options. -type CompressionType int - -// Constants for supported compression types. -const ( - Uncompressed CompressionType = iota - Deflate - LZW - CCITTGroup3 - CCITTGroup4 -) - -// specValue returns the compression type constant from the TIFF spec that -// is equivalent to c. -func (c CompressionType) specValue() uint32 { - switch c { - case LZW: - return cLZW - case Deflate: - return cDeflate - case CCITTGroup3: - return cG3 - case CCITTGroup4: - return cG4 - } - return cNone -} diff --git a/vendor/golang.org/x/image/tiff/fuzz.go b/vendor/golang.org/x/image/tiff/fuzz.go deleted file mode 100644 index b388b6f42..000000000 --- a/vendor/golang.org/x/image/tiff/fuzz.go +++ /dev/null @@ -1,29 +0,0 @@ -// Copyright 2019 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -//go:build gofuzz - -package tiff - -import "bytes" - -func Fuzz(data []byte) int { - cfg, err := DecodeConfig(bytes.NewReader(data)) - if err != nil { - return 0 - } - if cfg.Width*cfg.Height > 1e6 { - return 0 - } - img, err := Decode(bytes.NewReader(data)) - if err != nil { - return 0 - } - var w bytes.Buffer - err = Encode(&w, img, nil) - if err != nil { - panic(err) - } - return 1 -} diff --git a/vendor/golang.org/x/image/tiff/lzw/reader.go b/vendor/golang.org/x/image/tiff/lzw/reader.go deleted file mode 100644 index 0aae475ab..000000000 --- a/vendor/golang.org/x/image/tiff/lzw/reader.go +++ /dev/null @@ -1,272 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package lzw implements the Lempel-Ziv-Welch compressed data format, -// described in T. A. Welch, “A Technique for High-Performance Data -// Compression”, Computer, 17(6) (June 1984), pp 8-19. -// -// In particular, it implements LZW as used by the TIFF file format, including -// an "off by one" algorithmic difference when compared to standard LZW. -package lzw // import "golang.org/x/image/tiff/lzw" - -/* -This file was branched from src/pkg/compress/lzw/reader.go in the -standard library. Differences from the original are marked with "NOTE". - -The tif_lzw.c file in the libtiff C library has this comment: - ----- -The 5.0 spec describes a different algorithm than Aldus -implements. Specifically, Aldus does code length transitions -one code earlier than should be done (for real LZW). -Earlier versions of this library implemented the correct -LZW algorithm, but emitted codes in a bit order opposite -to the TIFF spec. Thus, to maintain compatibility w/ Aldus -we interpret MSB-LSB ordered codes to be images written w/ -old versions of this library, but otherwise adhere to the -Aldus "off by one" algorithm. ----- - -The Go code doesn't read (invalid) TIFF files written by old versions of -libtiff, but the LZW algorithm in this package still differs from the one in -Go's standard package library to accommodate this "off by one" in valid TIFFs. -*/ - -import ( - "bufio" - "errors" - "fmt" - "io" -) - -// Order specifies the bit ordering in an LZW data stream. -type Order int - -const ( - // LSB means Least Significant Bits first, as used in the GIF file format. - LSB Order = iota - // MSB means Most Significant Bits first, as used in the TIFF and PDF - // file formats. - MSB -) - -const ( - maxWidth = 12 - decoderInvalidCode = 0xffff - flushBuffer = 1 << maxWidth -) - -// decoder is the state from which the readXxx method converts a byte -// stream into a code stream. -type decoder struct { - r io.ByteReader - bits uint32 - nBits uint - width uint - read func(*decoder) (uint16, error) // readLSB or readMSB - litWidth int // width in bits of literal codes - err error - - // The first 1<<litWidth codes are literal codes. - // The next two codes mean clear and EOF. - // Other valid codes are in the range [lo, hi] where lo := clear + 2, - // with the upper bound incrementing on each code seen. - // overflow is the code at which hi overflows the code width. NOTE: TIFF's LZW is "off by one". - // last is the most recently seen code, or decoderInvalidCode. - clear, eof, hi, overflow, last uint16 - - // Each code c in [lo, hi] expands to two or more bytes. For c != hi: - // suffix[c] is the last of these bytes. - // prefix[c] is the code for all but the last byte. - // This code can either be a literal code or another code in [lo, c). - // The c == hi case is a special case. - suffix [1 << maxWidth]uint8 - prefix [1 << maxWidth]uint16 - - // output is the temporary output buffer. - // Literal codes are accumulated from the start of the buffer. - // Non-literal codes decode to a sequence of suffixes that are first - // written right-to-left from the end of the buffer before being copied - // to the start of the buffer. - // It is flushed when it contains >= 1<<maxWidth bytes, - // so that there is always room to decode an entire code. - output [2 * 1 << maxWidth]byte - o int // write index into output - toRead []byte // bytes to return from Read -} - -// readLSB returns the next code for "Least Significant Bits first" data. -func (d *decoder) readLSB() (uint16, error) { - for d.nBits < d.width { - x, err := d.r.ReadByte() - if err != nil { - return 0, err - } - d.bits |= uint32(x) << d.nBits - d.nBits += 8 - } - code := uint16(d.bits & (1<<d.width - 1)) - d.bits >>= d.width - d.nBits -= d.width - return code, nil -} - -// readMSB returns the next code for "Most Significant Bits first" data. -func (d *decoder) readMSB() (uint16, error) { - for d.nBits < d.width { - x, err := d.r.ReadByte() - if err != nil { - return 0, err - } - d.bits |= uint32(x) << (24 - d.nBits) - d.nBits += 8 - } - code := uint16(d.bits >> (32 - d.width)) - d.bits <<= d.width - d.nBits -= d.width - return code, nil -} - -func (d *decoder) Read(b []byte) (int, error) { - for { - if len(d.toRead) > 0 { - n := copy(b, d.toRead) - d.toRead = d.toRead[n:] - return n, nil - } - if d.err != nil { - return 0, d.err - } - d.decode() - } -} - -// decode decompresses bytes from r and leaves them in d.toRead. -// read specifies how to decode bytes into codes. -// litWidth is the width in bits of literal codes. -func (d *decoder) decode() { - // Loop over the code stream, converting codes into decompressed bytes. -loop: - for { - code, err := d.read(d) - if err != nil { - if err == io.EOF { - err = io.ErrUnexpectedEOF - } - d.err = err - break - } - switch { - case code < d.clear: - // We have a literal code. - d.output[d.o] = uint8(code) - d.o++ - if d.last != decoderInvalidCode { - // Save what the hi code expands to. - d.suffix[d.hi] = uint8(code) - d.prefix[d.hi] = d.last - } - case code == d.clear: - d.width = 1 + uint(d.litWidth) - d.hi = d.eof - d.overflow = 1 << d.width - d.last = decoderInvalidCode - continue - case code == d.eof: - d.err = io.EOF - break loop - case code <= d.hi: - c, i := code, len(d.output)-1 - if code == d.hi && d.last != decoderInvalidCode { - // code == hi is a special case which expands to the last expansion - // followed by the head of the last expansion. To find the head, we walk - // the prefix chain until we find a literal code. - c = d.last - for c >= d.clear { - c = d.prefix[c] - } - d.output[i] = uint8(c) - i-- - c = d.last - } - // Copy the suffix chain into output and then write that to w. - for c >= d.clear { - d.output[i] = d.suffix[c] - i-- - c = d.prefix[c] - } - d.output[i] = uint8(c) - d.o += copy(d.output[d.o:], d.output[i:]) - if d.last != decoderInvalidCode { - // Save what the hi code expands to. - d.suffix[d.hi] = uint8(c) - d.prefix[d.hi] = d.last - } - default: - d.err = errors.New("lzw: invalid code") - break loop - } - d.last, d.hi = code, d.hi+1 - if d.hi+1 >= d.overflow { // NOTE: the "+1" is where TIFF's LZW differs from the standard algorithm. - if d.width == maxWidth { - d.last = decoderInvalidCode - } else { - d.width++ - d.overflow <<= 1 - } - } - if d.o >= flushBuffer { - break - } - } - // Flush pending output. - d.toRead = d.output[:d.o] - d.o = 0 -} - -var errClosed = errors.New("lzw: reader/writer is closed") - -func (d *decoder) Close() error { - d.err = errClosed // in case any Reads come along - return nil -} - -// NewReader creates a new io.ReadCloser. -// Reads from the returned io.ReadCloser read and decompress data from r. -// If r does not also implement io.ByteReader, -// the decompressor may read more data than necessary from r. -// It is the caller's responsibility to call Close on the ReadCloser when -// finished reading. -// The number of bits to use for literal codes, litWidth, must be in the -// range [2,8] and is typically 8. It must equal the litWidth -// used during compression. -func NewReader(r io.Reader, order Order, litWidth int) io.ReadCloser { - d := new(decoder) - switch order { - case LSB: - d.read = (*decoder).readLSB - case MSB: - d.read = (*decoder).readMSB - default: - d.err = errors.New("lzw: unknown order") - return d - } - if litWidth < 2 || 8 < litWidth { - d.err = fmt.Errorf("lzw: litWidth %d out of range", litWidth) - return d - } - if br, ok := r.(io.ByteReader); ok { - d.r = br - } else { - d.r = bufio.NewReader(r) - } - d.litWidth = litWidth - d.width = 1 + uint(litWidth) - d.clear = uint16(1) << uint(litWidth) - d.eof, d.hi = d.clear+1, d.clear+1 - d.overflow = uint16(1) << d.width - d.last = decoderInvalidCode - - return d -} diff --git a/vendor/golang.org/x/image/tiff/reader.go b/vendor/golang.org/x/image/tiff/reader.go deleted file mode 100644 index 1b8fcb859..000000000 --- a/vendor/golang.org/x/image/tiff/reader.go +++ /dev/null @@ -1,785 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package tiff implements a TIFF image decoder and encoder. -// -// The TIFF specification is at http://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf -package tiff // import "golang.org/x/image/tiff" - -import ( - "bytes" - "compress/zlib" - "encoding/binary" - "fmt" - "image" - "image/color" - "io" - "math" - - "golang.org/x/image/ccitt" - "golang.org/x/image/tiff/lzw" -) - -// A FormatError reports that the input is not a valid TIFF image. -type FormatError string - -func (e FormatError) Error() string { - return "tiff: invalid format: " + string(e) -} - -// An UnsupportedError reports that the input uses a valid but -// unimplemented feature. -type UnsupportedError string - -func (e UnsupportedError) Error() string { - return "tiff: unsupported feature: " + string(e) -} - -var ( - errNoPixels = FormatError("not enough pixel data") - errInvalidColorIndex = FormatError("invalid color index") -) - -const maxChunkSize = 10 << 20 // 10M - -// safeReadAt is a verbatim copy of internal/saferio.ReadDataAt from the -// standard library, which is used to read data from a reader using a length -// provided by untrusted data, without allocating the entire slice ahead of time -// if it is large (>maxChunkSize). This allows us to avoid allocating giant -// slices before learning that we can't actually read that much data from the -// reader. -func safeReadAt(r io.ReaderAt, n uint64, off int64) ([]byte, error) { - if int64(n) < 0 || n != uint64(int(n)) { - // n is too large to fit in int, so we can't allocate - // a buffer large enough. Treat this as a read failure. - return nil, io.ErrUnexpectedEOF - } - - if n < maxChunkSize { - buf := make([]byte, n) - _, err := r.ReadAt(buf, off) - if err != nil { - // io.SectionReader can return EOF for n == 0, - // but for our purposes that is a success. - if err != io.EOF || n > 0 { - return nil, err - } - } - return buf, nil - } - - var buf []byte - buf1 := make([]byte, maxChunkSize) - for n > 0 { - next := n - if next > maxChunkSize { - next = maxChunkSize - } - _, err := r.ReadAt(buf1[:next], off) - if err != nil { - return nil, err - } - buf = append(buf, buf1[:next]...) - n -= next - off += int64(next) - } - return buf, nil -} - -type decoder struct { - r io.ReaderAt - byteOrder binary.ByteOrder - config image.Config - mode imageMode - bpp uint - features map[int][]uint - palette []color.Color - - buf []byte - off int // Current offset in buf. - v uint32 // Buffer value for reading with arbitrary bit depths. - nbits uint // Remaining number of bits in v. -} - -// firstVal returns the first uint of the features entry with the given tag, -// or 0 if the tag does not exist. -func (d *decoder) firstVal(tag int) uint { - f := d.features[tag] - if len(f) == 0 { - return 0 - } - return f[0] -} - -// ifdUint decodes the IFD entry in p, which must be of the Byte, Short -// or Long type, and returns the decoded uint values. -func (d *decoder) ifdUint(p []byte) (u []uint, err error) { - var raw []byte - if len(p) < ifdLen { - return nil, FormatError("bad IFD entry") - } - - datatype := d.byteOrder.Uint16(p[2:4]) - if dt := int(datatype); dt <= 0 || dt >= len(lengths) { - return nil, UnsupportedError("IFD entry datatype") - } - - count := d.byteOrder.Uint32(p[4:8]) - if count > math.MaxInt32/lengths[datatype] { - return nil, FormatError("IFD data too large") - } - if datalen := lengths[datatype] * count; datalen > 4 { - // The IFD contains a pointer to the real value. - raw, err = safeReadAt(d.r, uint64(datalen), int64(d.byteOrder.Uint32(p[8:12]))) - } else { - raw = p[8 : 8+datalen] - } - if err != nil { - return nil, err - } - - u = make([]uint, count) - switch datatype { - case dtByte: - for i := uint32(0); i < count; i++ { - u[i] = uint(raw[i]) - } - case dtShort: - for i := uint32(0); i < count; i++ { - u[i] = uint(d.byteOrder.Uint16(raw[2*i : 2*(i+1)])) - } - case dtLong: - for i := uint32(0); i < count; i++ { - u[i] = uint(d.byteOrder.Uint32(raw[4*i : 4*(i+1)])) - } - default: - return nil, UnsupportedError("data type") - } - return u, nil -} - -// parseIFD decides whether the IFD entry in p is "interesting" and -// stows away the data in the decoder. It returns the tag number of the -// entry and an error, if any. -func (d *decoder) parseIFD(p []byte) (int, error) { - tag := d.byteOrder.Uint16(p[0:2]) - switch tag { - case tBitsPerSample, - tExtraSamples, - tPhotometricInterpretation, - tCompression, - tPredictor, - tStripOffsets, - tStripByteCounts, - tRowsPerStrip, - tTileWidth, - tTileLength, - tTileOffsets, - tTileByteCounts, - tImageLength, - tImageWidth, - tFillOrder, - tT4Options, - tT6Options: - val, err := d.ifdUint(p) - if err != nil { - return 0, err - } - d.features[int(tag)] = val - case tColorMap: - val, err := d.ifdUint(p) - if err != nil { - return 0, err - } - numcolors := len(val) / 3 - if len(val)%3 != 0 || numcolors <= 0 || numcolors > 256 { - return 0, FormatError("bad ColorMap length") - } - d.palette = make([]color.Color, numcolors) - for i := 0; i < numcolors; i++ { - d.palette[i] = color.RGBA64{ - uint16(val[i]), - uint16(val[i+numcolors]), - uint16(val[i+2*numcolors]), - 0xffff, - } - } - case tSampleFormat: - // Page 27 of the spec: If the SampleFormat is present and - // the value is not 1 [= unsigned integer data], a Baseline - // TIFF reader that cannot handle the SampleFormat value - // must terminate the import process gracefully. - val, err := d.ifdUint(p) - if err != nil { - return 0, err - } - for _, v := range val { - if v != 1 { - return 0, UnsupportedError("sample format") - } - } - } - return int(tag), nil -} - -// readBits reads n bits from the internal buffer starting at the current offset. -func (d *decoder) readBits(n uint) (v uint32, ok bool) { - for d.nbits < n { - d.v <<= 8 - if d.off >= len(d.buf) { - return 0, false - } - d.v |= uint32(d.buf[d.off]) - d.off++ - d.nbits += 8 - } - d.nbits -= n - rv := d.v >> d.nbits - d.v &^= rv << d.nbits - return rv, true -} - -// flushBits discards the unread bits in the buffer used by readBits. -// It is used at the end of a line. -func (d *decoder) flushBits() { - d.v = 0 - d.nbits = 0 -} - -// minInt returns the smaller of x or y. -func minInt(a, b int) int { - if a <= b { - return a - } - return b -} - -// decode decodes the raw data of an image. -// It reads from d.buf and writes the strip or tile into dst. -func (d *decoder) decode(dst image.Image, xmin, ymin, xmax, ymax int) error { - d.off = 0 - - // Apply horizontal predictor if necessary. - // In this case, p contains the color difference to the preceding pixel. - // See page 64-65 of the spec. - if d.firstVal(tPredictor) == prHorizontal { - switch d.bpp { - case 16: - var off int - n := 2 * len(d.features[tBitsPerSample]) // bytes per sample times samples per pixel - for y := ymin; y < ymax; y++ { - off += n - for x := 0; x < (xmax-xmin-1)*n; x += 2 { - if off+2 > len(d.buf) { - return errNoPixels - } - v0 := d.byteOrder.Uint16(d.buf[off-n : off-n+2]) - v1 := d.byteOrder.Uint16(d.buf[off : off+2]) - d.byteOrder.PutUint16(d.buf[off:off+2], v1+v0) - off += 2 - } - } - case 8: - var off int - n := 1 * len(d.features[tBitsPerSample]) // bytes per sample times samples per pixel - for y := ymin; y < ymax; y++ { - off += n - for x := 0; x < (xmax-xmin-1)*n; x++ { - if off >= len(d.buf) { - return errNoPixels - } - d.buf[off] += d.buf[off-n] - off++ - } - } - case 1: - return UnsupportedError("horizontal predictor with 1 BitsPerSample") - } - } - - rMaxX := minInt(xmax, dst.Bounds().Max.X) - rMaxY := minInt(ymax, dst.Bounds().Max.Y) - switch d.mode { - case mGray, mGrayInvert: - if d.bpp == 16 { - img := dst.(*image.Gray16) - for y := ymin; y < rMaxY; y++ { - for x := xmin; x < rMaxX; x++ { - if d.off+2 > len(d.buf) { - return errNoPixels - } - v := d.byteOrder.Uint16(d.buf[d.off : d.off+2]) - d.off += 2 - if d.mode == mGrayInvert { - v = 0xffff - v - } - img.SetGray16(x, y, color.Gray16{v}) - } - if rMaxX == img.Bounds().Max.X { - d.off += 2 * (xmax - img.Bounds().Max.X) - } - } - } else { - img := dst.(*image.Gray) - max := uint32((1 << d.bpp) - 1) - for y := ymin; y < rMaxY; y++ { - for x := xmin; x < rMaxX; x++ { - v, ok := d.readBits(d.bpp) - if !ok { - return errNoPixels - } - v = v * 0xff / max - if d.mode == mGrayInvert { - v = 0xff - v - } - img.SetGray(x, y, color.Gray{uint8(v)}) - } - d.flushBits() - } - } - case mPaletted: - img := dst.(*image.Paletted) - pLen := len(d.palette) - for y := ymin; y < rMaxY; y++ { - for x := xmin; x < rMaxX; x++ { - v, ok := d.readBits(d.bpp) - if !ok { - return errNoPixels - } - idx := uint8(v) - if int(idx) >= pLen { - return errInvalidColorIndex - } - img.SetColorIndex(x, y, idx) - } - d.flushBits() - } - case mRGB: - if d.bpp == 16 { - img := dst.(*image.RGBA64) - for y := ymin; y < rMaxY; y++ { - for x := xmin; x < rMaxX; x++ { - if d.off+6 > len(d.buf) { - return errNoPixels - } - r := d.byteOrder.Uint16(d.buf[d.off+0 : d.off+2]) - g := d.byteOrder.Uint16(d.buf[d.off+2 : d.off+4]) - b := d.byteOrder.Uint16(d.buf[d.off+4 : d.off+6]) - d.off += 6 - img.SetRGBA64(x, y, color.RGBA64{r, g, b, 0xffff}) - } - } - } else { - img := dst.(*image.RGBA) - for y := ymin; y < rMaxY; y++ { - min := img.PixOffset(xmin, y) - max := img.PixOffset(rMaxX, y) - off := (y - ymin) * (xmax - xmin) * 3 - for i := min; i < max; i += 4 { - if off+3 > len(d.buf) { - return errNoPixels - } - img.Pix[i+0] = d.buf[off+0] - img.Pix[i+1] = d.buf[off+1] - img.Pix[i+2] = d.buf[off+2] - img.Pix[i+3] = 0xff - off += 3 - } - } - } - case mNRGBA: - if d.bpp == 16 { - img := dst.(*image.NRGBA64) - for y := ymin; y < rMaxY; y++ { - for x := xmin; x < rMaxX; x++ { - if d.off+8 > len(d.buf) { - return errNoPixels - } - r := d.byteOrder.Uint16(d.buf[d.off+0 : d.off+2]) - g := d.byteOrder.Uint16(d.buf[d.off+2 : d.off+4]) - b := d.byteOrder.Uint16(d.buf[d.off+4 : d.off+6]) - a := d.byteOrder.Uint16(d.buf[d.off+6 : d.off+8]) - d.off += 8 - img.SetNRGBA64(x, y, color.NRGBA64{r, g, b, a}) - } - } - } else { - img := dst.(*image.NRGBA) - for y := ymin; y < rMaxY; y++ { - min := img.PixOffset(xmin, y) - max := img.PixOffset(rMaxX, y) - i0, i1 := (y-ymin)*(xmax-xmin)*4, (y-ymin+1)*(xmax-xmin)*4 - if i1 > len(d.buf) { - return errNoPixels - } - copy(img.Pix[min:max], d.buf[i0:i1]) - } - } - case mRGBA: - if d.bpp == 16 { - img := dst.(*image.RGBA64) - for y := ymin; y < rMaxY; y++ { - for x := xmin; x < rMaxX; x++ { - if d.off+8 > len(d.buf) { - return errNoPixels - } - r := d.byteOrder.Uint16(d.buf[d.off+0 : d.off+2]) - g := d.byteOrder.Uint16(d.buf[d.off+2 : d.off+4]) - b := d.byteOrder.Uint16(d.buf[d.off+4 : d.off+6]) - a := d.byteOrder.Uint16(d.buf[d.off+6 : d.off+8]) - d.off += 8 - img.SetRGBA64(x, y, color.RGBA64{r, g, b, a}) - } - } - } else { - img := dst.(*image.RGBA) - for y := ymin; y < rMaxY; y++ { - min := img.PixOffset(xmin, y) - max := img.PixOffset(rMaxX, y) - i0, i1 := (y-ymin)*(xmax-xmin)*4, (y-ymin+1)*(xmax-xmin)*4 - if i1 > len(d.buf) { - return errNoPixels - } - copy(img.Pix[min:max], d.buf[i0:i1]) - } - } - } - - return nil -} - -func newDecoder(r io.Reader) (*decoder, error) { - d := &decoder{ - r: newReaderAt(r), - features: make(map[int][]uint), - } - - p := make([]byte, 8) - if _, err := d.r.ReadAt(p, 0); err != nil { - if err == io.EOF { - err = io.ErrUnexpectedEOF - } - return nil, err - } - switch string(p[0:4]) { - case leHeader: - d.byteOrder = binary.LittleEndian - case beHeader: - d.byteOrder = binary.BigEndian - default: - return nil, FormatError("malformed header") - } - - ifdOffset := int64(d.byteOrder.Uint32(p[4:8])) - - // The first two bytes contain the number of entries (12 bytes each). - if _, err := d.r.ReadAt(p[0:2], ifdOffset); err != nil { - return nil, err - } - numItems := int(d.byteOrder.Uint16(p[0:2])) - - // All IFD entries are read in one chunk. - var err error - p, err = safeReadAt(d.r, uint64(ifdLen*numItems), ifdOffset+2) - if err != nil { - return nil, err - } - - prevTag := -1 - for i := 0; i < len(p); i += ifdLen { - tag, err := d.parseIFD(p[i : i+ifdLen]) - if err != nil { - return nil, err - } - if tag <= prevTag { - return nil, FormatError("tags are not sorted in ascending order") - } - prevTag = tag - } - - d.config.Width = int(d.firstVal(tImageWidth)) - d.config.Height = int(d.firstVal(tImageLength)) - - if _, ok := d.features[tBitsPerSample]; !ok { - // Default is 1 per specification. - d.features[tBitsPerSample] = []uint{1} - } - d.bpp = d.firstVal(tBitsPerSample) - switch d.bpp { - case 0: - return nil, FormatError("BitsPerSample must not be 0") - case 1, 8, 16: - // Nothing to do, these are accepted by this implementation. - default: - return nil, UnsupportedError(fmt.Sprintf("BitsPerSample of %v", d.bpp)) - } - - // Determine the image mode. - switch d.firstVal(tPhotometricInterpretation) { - case pRGB: - if d.bpp == 16 { - for _, b := range d.features[tBitsPerSample] { - if b != 16 { - return nil, FormatError("wrong number of samples for 16bit RGB") - } - } - } else { - for _, b := range d.features[tBitsPerSample] { - if b != 8 { - return nil, FormatError("wrong number of samples for 8bit RGB") - } - } - } - // RGB images normally have 3 samples per pixel. - // If there are more, ExtraSamples (p. 31-32 of the spec) - // gives their meaning (usually an alpha channel). - // - // This implementation does not support extra samples - // of an unspecified type. - switch len(d.features[tBitsPerSample]) { - case 3: - d.mode = mRGB - if d.bpp == 16 { - d.config.ColorModel = color.RGBA64Model - } else { - d.config.ColorModel = color.RGBAModel - } - case 4: - switch d.firstVal(tExtraSamples) { - case 1: - d.mode = mRGBA - if d.bpp == 16 { - d.config.ColorModel = color.RGBA64Model - } else { - d.config.ColorModel = color.RGBAModel - } - case 2: - d.mode = mNRGBA - if d.bpp == 16 { - d.config.ColorModel = color.NRGBA64Model - } else { - d.config.ColorModel = color.NRGBAModel - } - default: - return nil, FormatError("wrong number of samples for RGB") - } - default: - return nil, FormatError("wrong number of samples for RGB") - } - case pPaletted: - d.mode = mPaletted - d.config.ColorModel = color.Palette(d.palette) - case pWhiteIsZero: - d.mode = mGrayInvert - if d.bpp == 16 { - d.config.ColorModel = color.Gray16Model - } else { - d.config.ColorModel = color.GrayModel - } - case pBlackIsZero: - d.mode = mGray - if d.bpp == 16 { - d.config.ColorModel = color.Gray16Model - } else { - d.config.ColorModel = color.GrayModel - } - default: - return nil, UnsupportedError("color model") - } - if d.firstVal(tPhotometricInterpretation) != pRGB { - if len(d.features[tBitsPerSample]) != 1 { - return nil, UnsupportedError("extra samples") - } - } - - return d, nil -} - -// DecodeConfig returns the color model and dimensions of a TIFF image without -// decoding the entire image. -func DecodeConfig(r io.Reader) (image.Config, error) { - d, err := newDecoder(r) - if err != nil { - return image.Config{}, err - } - return d.config, nil -} - -func ccittFillOrder(tiffFillOrder uint) ccitt.Order { - if tiffFillOrder == 2 { - return ccitt.LSB - } - return ccitt.MSB -} - -// Decode reads a TIFF image from r and returns it as an image.Image. -// The type of Image returned depends on the contents of the TIFF. -func Decode(r io.Reader) (img image.Image, err error) { - d, err := newDecoder(r) - if err != nil { - return - } - - blockPadding := false - blockWidth := d.config.Width - blockHeight := d.config.Height - blocksAcross := 1 - blocksDown := 1 - - if d.config.Width == 0 { - blocksAcross = 0 - } - if d.config.Height == 0 { - blocksDown = 0 - } - - var blockOffsets, blockCounts []uint - - if int(d.firstVal(tTileWidth)) != 0 { - blockPadding = true - - blockWidth = int(d.firstVal(tTileWidth)) - blockHeight = int(d.firstVal(tTileLength)) - - // The specification says that tile widths and lengths must be a multiple of 16. - // We currently permit invalid sizes, but reject anything too small to limit the - // amount of work a malicious input can force us to perform. - if blockWidth < 8 || blockHeight < 8 { - return nil, FormatError("tile size is too small") - } - - if blockWidth != 0 { - blocksAcross = (d.config.Width + blockWidth - 1) / blockWidth - } - if blockHeight != 0 { - blocksDown = (d.config.Height + blockHeight - 1) / blockHeight - } - - blockCounts = d.features[tTileByteCounts] - blockOffsets = d.features[tTileOffsets] - - } else { - if int(d.firstVal(tRowsPerStrip)) != 0 { - blockHeight = int(d.firstVal(tRowsPerStrip)) - } - - if blockHeight != 0 { - blocksDown = (d.config.Height + blockHeight - 1) / blockHeight - } - - blockOffsets = d.features[tStripOffsets] - blockCounts = d.features[tStripByteCounts] - } - - // Check if we have the right number of strips/tiles, offsets and counts. - if n := blocksAcross * blocksDown; len(blockOffsets) < n || len(blockCounts) < n { - return nil, FormatError("inconsistent header") - } - - imgRect := image.Rect(0, 0, d.config.Width, d.config.Height) - switch d.mode { - case mGray, mGrayInvert: - if d.bpp == 16 { - img = image.NewGray16(imgRect) - } else { - img = image.NewGray(imgRect) - } - case mPaletted: - img = image.NewPaletted(imgRect, d.palette) - case mNRGBA: - if d.bpp == 16 { - img = image.NewNRGBA64(imgRect) - } else { - img = image.NewNRGBA(imgRect) - } - case mRGB, mRGBA: - if d.bpp == 16 { - img = image.NewRGBA64(imgRect) - } else { - img = image.NewRGBA(imgRect) - } - } - - if blocksAcross == 0 || blocksDown == 0 { - return - } - // Maximum data per pixel is 8 bytes (RGBA64). - blockMaxDataSize := int64(blockWidth) * int64(blockHeight) * 8 - for i := 0; i < blocksAcross; i++ { - blkW := blockWidth - if !blockPadding && i == blocksAcross-1 && d.config.Width%blockWidth != 0 { - blkW = d.config.Width % blockWidth - } - for j := 0; j < blocksDown; j++ { - blkH := blockHeight - if !blockPadding && j == blocksDown-1 && d.config.Height%blockHeight != 0 { - blkH = d.config.Height % blockHeight - } - offset := int64(blockOffsets[j*blocksAcross+i]) - n := int64(blockCounts[j*blocksAcross+i]) - switch d.firstVal(tCompression) { - - // According to the spec, Compression does not have a default value, - // but some tools interpret a missing Compression value as none so we do - // the same. - case cNone, 0: - if b, ok := d.r.(*buffer); ok { - d.buf, err = b.Slice(int(offset), int(n)) - } else { - d.buf, err = safeReadAt(d.r, uint64(n), offset) - } - case cG3: - inv := d.firstVal(tPhotometricInterpretation) == pWhiteIsZero - order := ccittFillOrder(d.firstVal(tFillOrder)) - r := ccitt.NewReader(io.NewSectionReader(d.r, offset, n), order, ccitt.Group3, blkW, blkH, &ccitt.Options{Invert: inv, Align: false}) - d.buf, err = readBuf(r, d.buf, blockMaxDataSize) - case cG4: - inv := d.firstVal(tPhotometricInterpretation) == pWhiteIsZero - order := ccittFillOrder(d.firstVal(tFillOrder)) - r := ccitt.NewReader(io.NewSectionReader(d.r, offset, n), order, ccitt.Group4, blkW, blkH, &ccitt.Options{Invert: inv, Align: false}) - d.buf, err = readBuf(r, d.buf, blockMaxDataSize) - case cLZW: - r := lzw.NewReader(io.NewSectionReader(d.r, offset, n), lzw.MSB, 8) - d.buf, err = readBuf(r, d.buf, blockMaxDataSize) - r.Close() - case cDeflate, cDeflateOld: - var r io.ReadCloser - r, err = zlib.NewReader(io.NewSectionReader(d.r, offset, n)) - if err != nil { - return nil, err - } - d.buf, err = readBuf(r, d.buf, blockMaxDataSize) - r.Close() - case cPackBits: - d.buf, err = unpackBits(io.NewSectionReader(d.r, offset, n)) - default: - err = UnsupportedError(fmt.Sprintf("compression value %d", d.firstVal(tCompression))) - } - if err != nil { - return nil, err - } - - xmin := i * blockWidth - ymin := j * blockHeight - xmax := xmin + blkW - ymax := ymin + blkH - err = d.decode(img, xmin, ymin, xmax, ymax) - if err != nil { - return nil, err - } - } - } - return -} - -func readBuf(r io.Reader, buf []byte, lim int64) ([]byte, error) { - b := bytes.NewBuffer(buf[:0]) - _, err := b.ReadFrom(io.LimitReader(r, lim)) - return b.Bytes(), err -} - -func init() { - image.RegisterFormat("tiff", leHeader, Decode, DecodeConfig) - image.RegisterFormat("tiff", beHeader, Decode, DecodeConfig) -} diff --git a/vendor/golang.org/x/image/tiff/writer.go b/vendor/golang.org/x/image/tiff/writer.go deleted file mode 100644 index 5d461841c..000000000 --- a/vendor/golang.org/x/image/tiff/writer.go +++ /dev/null @@ -1,441 +0,0 @@ -// Copyright 2012 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package tiff - -import ( - "bytes" - "compress/zlib" - "encoding/binary" - "errors" - "image" - "io" - "sort" -) - -// The TIFF format allows to choose the order of the different elements freely. -// The basic structure of a TIFF file written by this package is: -// -// 1. Header (8 bytes). -// 2. Image data. -// 3. Image File Directory (IFD). -// 4. "Pointer area" for larger entries in the IFD. - -// We only write little-endian TIFF files. -var enc = binary.LittleEndian - -// An ifdEntry is a single entry in an Image File Directory. -// A value of type dtRational is composed of two 32-bit values, -// thus data contains two uints (numerator and denominator) for a single number. -type ifdEntry struct { - tag int - datatype int - data []uint32 -} - -func (e ifdEntry) putData(p []byte) { - for _, d := range e.data { - switch e.datatype { - case dtByte, dtASCII: - p[0] = byte(d) - p = p[1:] - case dtShort: - enc.PutUint16(p, uint16(d)) - p = p[2:] - case dtLong, dtRational: - enc.PutUint32(p, uint32(d)) - p = p[4:] - } - } -} - -type byTag []ifdEntry - -func (d byTag) Len() int { return len(d) } -func (d byTag) Less(i, j int) bool { return d[i].tag < d[j].tag } -func (d byTag) Swap(i, j int) { d[i], d[j] = d[j], d[i] } - -func encodeGray(w io.Writer, pix []uint8, dx, dy, stride int, predictor bool) error { - if !predictor { - return writePix(w, pix, dy, dx, stride) - } - buf := make([]byte, dx) - for y := 0; y < dy; y++ { - min := y*stride + 0 - max := y*stride + dx - off := 0 - var v0 uint8 - for i := min; i < max; i++ { - v1 := pix[i] - buf[off] = v1 - v0 - v0 = v1 - off++ - } - if _, err := w.Write(buf); err != nil { - return err - } - } - return nil -} - -func encodeGray16(w io.Writer, pix []uint8, dx, dy, stride int, predictor bool) error { - buf := make([]byte, dx*2) - for y := 0; y < dy; y++ { - min := y*stride + 0 - max := y*stride + dx*2 - off := 0 - var v0 uint16 - for i := min; i < max; i += 2 { - // An image.Gray16's Pix is in big-endian order. - v1 := uint16(pix[i])<<8 | uint16(pix[i+1]) - if predictor { - v0, v1 = v1, v1-v0 - } - // We only write little-endian TIFF files. - buf[off+0] = byte(v1) - buf[off+1] = byte(v1 >> 8) - off += 2 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - return nil -} - -func encodeRGBA(w io.Writer, pix []uint8, dx, dy, stride int, predictor bool) error { - if !predictor { - return writePix(w, pix, dy, dx*4, stride) - } - buf := make([]byte, dx*4) - for y := 0; y < dy; y++ { - min := y*stride + 0 - max := y*stride + dx*4 - off := 0 - var r0, g0, b0, a0 uint8 - for i := min; i < max; i += 4 { - r1, g1, b1, a1 := pix[i+0], pix[i+1], pix[i+2], pix[i+3] - buf[off+0] = r1 - r0 - buf[off+1] = g1 - g0 - buf[off+2] = b1 - b0 - buf[off+3] = a1 - a0 - off += 4 - r0, g0, b0, a0 = r1, g1, b1, a1 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - return nil -} - -func encodeRGBA64(w io.Writer, pix []uint8, dx, dy, stride int, predictor bool) error { - buf := make([]byte, dx*8) - for y := 0; y < dy; y++ { - min := y*stride + 0 - max := y*stride + dx*8 - off := 0 - var r0, g0, b0, a0 uint16 - for i := min; i < max; i += 8 { - // An image.RGBA64's Pix is in big-endian order. - r1 := uint16(pix[i+0])<<8 | uint16(pix[i+1]) - g1 := uint16(pix[i+2])<<8 | uint16(pix[i+3]) - b1 := uint16(pix[i+4])<<8 | uint16(pix[i+5]) - a1 := uint16(pix[i+6])<<8 | uint16(pix[i+7]) - if predictor { - r0, r1 = r1, r1-r0 - g0, g1 = g1, g1-g0 - b0, b1 = b1, b1-b0 - a0, a1 = a1, a1-a0 - } - // We only write little-endian TIFF files. - buf[off+0] = byte(r1) - buf[off+1] = byte(r1 >> 8) - buf[off+2] = byte(g1) - buf[off+3] = byte(g1 >> 8) - buf[off+4] = byte(b1) - buf[off+5] = byte(b1 >> 8) - buf[off+6] = byte(a1) - buf[off+7] = byte(a1 >> 8) - off += 8 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - return nil -} - -func encode(w io.Writer, m image.Image, predictor bool) error { - bounds := m.Bounds() - buf := make([]byte, 4*bounds.Dx()) - for y := bounds.Min.Y; y < bounds.Max.Y; y++ { - off := 0 - if predictor { - var r0, g0, b0, a0 uint8 - for x := bounds.Min.X; x < bounds.Max.X; x++ { - r, g, b, a := m.At(x, y).RGBA() - r1 := uint8(r >> 8) - g1 := uint8(g >> 8) - b1 := uint8(b >> 8) - a1 := uint8(a >> 8) - buf[off+0] = r1 - r0 - buf[off+1] = g1 - g0 - buf[off+2] = b1 - b0 - buf[off+3] = a1 - a0 - off += 4 - r0, g0, b0, a0 = r1, g1, b1, a1 - } - } else { - for x := bounds.Min.X; x < bounds.Max.X; x++ { - r, g, b, a := m.At(x, y).RGBA() - buf[off+0] = uint8(r >> 8) - buf[off+1] = uint8(g >> 8) - buf[off+2] = uint8(b >> 8) - buf[off+3] = uint8(a >> 8) - off += 4 - } - } - if _, err := w.Write(buf); err != nil { - return err - } - } - return nil -} - -// writePix writes the internal byte array of an image to w. It is less general -// but much faster then encode. writePix is used when pix directly -// corresponds to one of the TIFF image types. -func writePix(w io.Writer, pix []byte, nrows, length, stride int) error { - if length == stride { - _, err := w.Write(pix[:nrows*length]) - return err - } - for ; nrows > 0; nrows-- { - if _, err := w.Write(pix[:length]); err != nil { - return err - } - pix = pix[stride:] - } - return nil -} - -func writeIFD(w io.Writer, ifdOffset int, d []ifdEntry) error { - var buf [ifdLen]byte - // Make space for "pointer area" containing IFD entry data - // longer than 4 bytes. - parea := make([]byte, 1024) - pstart := ifdOffset + ifdLen*len(d) + 6 - var o int // Current offset in parea. - - // The IFD has to be written with the tags in ascending order. - sort.Sort(byTag(d)) - - // Write the number of entries in this IFD. - if err := binary.Write(w, enc, uint16(len(d))); err != nil { - return err - } - for _, ent := range d { - enc.PutUint16(buf[0:2], uint16(ent.tag)) - enc.PutUint16(buf[2:4], uint16(ent.datatype)) - count := uint32(len(ent.data)) - if ent.datatype == dtRational { - count /= 2 - } - enc.PutUint32(buf[4:8], count) - datalen := int(count * lengths[ent.datatype]) - if datalen <= 4 { - ent.putData(buf[8:12]) - } else { - if (o + datalen) > len(parea) { - newlen := len(parea) + 1024 - for (o + datalen) > newlen { - newlen += 1024 - } - newarea := make([]byte, newlen) - copy(newarea, parea) - parea = newarea - } - ent.putData(parea[o : o+datalen]) - enc.PutUint32(buf[8:12], uint32(pstart+o)) - o += datalen - } - if _, err := w.Write(buf[:]); err != nil { - return err - } - } - // The IFD ends with the offset of the next IFD in the file, - // or zero if it is the last one (page 14). - if err := binary.Write(w, enc, uint32(0)); err != nil { - return err - } - _, err := w.Write(parea[:o]) - return err -} - -// Options are the encoding parameters. -type Options struct { - // Compression is the type of compression used. - Compression CompressionType - // Predictor determines whether a differencing predictor is used; - // if true, instead of each pixel's color, the color difference to the - // preceding one is saved. This improves the compression for certain - // types of images and compressors. For example, it works well for - // photos with Deflate compression. - Predictor bool -} - -// Encode writes the image m to w. opt determines the options used for -// encoding, such as the compression type. If opt is nil, an uncompressed -// image is written. -func Encode(w io.Writer, m image.Image, opt *Options) error { - d := m.Bounds().Size() - - compression := uint32(cNone) - predictor := false - if opt != nil { - compression = opt.Compression.specValue() - // The predictor field is only used with LZW. See page 64 of the spec. - predictor = opt.Predictor && compression == cLZW - } - - _, err := io.WriteString(w, leHeader) - if err != nil { - return err - } - - // Compressed data is written into a buffer first, so that we - // know the compressed size. - var buf bytes.Buffer - // dst holds the destination for the pixel data of the image -- - // either w or a writer to buf. - var dst io.Writer - // imageLen is the length of the pixel data in bytes. - // The offset of the IFD is imageLen + 8 header bytes. - var imageLen int - - switch compression { - case cNone: - dst = w - // Write IFD offset before outputting pixel data. - switch m.(type) { - case *image.Paletted: - imageLen = d.X * d.Y * 1 - case *image.Gray: - imageLen = d.X * d.Y * 1 - case *image.Gray16: - imageLen = d.X * d.Y * 2 - case *image.RGBA64: - imageLen = d.X * d.Y * 8 - case *image.NRGBA64: - imageLen = d.X * d.Y * 8 - default: - imageLen = d.X * d.Y * 4 - } - err = binary.Write(w, enc, uint32(imageLen+8)) - if err != nil { - return err - } - case cDeflate: - dst = zlib.NewWriter(&buf) - default: - return errors.New("tiff: unsupported compression") - } - - pr := uint32(prNone) - photometricInterpretation := uint32(pRGB) - samplesPerPixel := uint32(4) - bitsPerSample := []uint32{8, 8, 8, 8} - extraSamples := uint32(0) - colorMap := []uint32{} - - if predictor { - pr = prHorizontal - } - switch m := m.(type) { - case *image.Paletted: - photometricInterpretation = pPaletted - samplesPerPixel = 1 - bitsPerSample = []uint32{8} - colorMap = make([]uint32, 256*3) - for i := 0; i < 256 && i < len(m.Palette); i++ { - r, g, b, _ := m.Palette[i].RGBA() - colorMap[i+0*256] = uint32(r) - colorMap[i+1*256] = uint32(g) - colorMap[i+2*256] = uint32(b) - } - err = encodeGray(dst, m.Pix, d.X, d.Y, m.Stride, predictor) - case *image.Gray: - photometricInterpretation = pBlackIsZero - samplesPerPixel = 1 - bitsPerSample = []uint32{8} - err = encodeGray(dst, m.Pix, d.X, d.Y, m.Stride, predictor) - case *image.Gray16: - photometricInterpretation = pBlackIsZero - samplesPerPixel = 1 - bitsPerSample = []uint32{16} - err = encodeGray16(dst, m.Pix, d.X, d.Y, m.Stride, predictor) - case *image.NRGBA: - extraSamples = 2 // Unassociated alpha. - err = encodeRGBA(dst, m.Pix, d.X, d.Y, m.Stride, predictor) - case *image.NRGBA64: - extraSamples = 2 // Unassociated alpha. - bitsPerSample = []uint32{16, 16, 16, 16} - err = encodeRGBA64(dst, m.Pix, d.X, d.Y, m.Stride, predictor) - case *image.RGBA: - extraSamples = 1 // Associated alpha. - err = encodeRGBA(dst, m.Pix, d.X, d.Y, m.Stride, predictor) - case *image.RGBA64: - extraSamples = 1 // Associated alpha. - bitsPerSample = []uint32{16, 16, 16, 16} - err = encodeRGBA64(dst, m.Pix, d.X, d.Y, m.Stride, predictor) - default: - extraSamples = 1 // Associated alpha. - err = encode(dst, m, predictor) - } - if err != nil { - return err - } - - if compression != cNone { - if err = dst.(io.Closer).Close(); err != nil { - return err - } - imageLen = buf.Len() - if err = binary.Write(w, enc, uint32(imageLen+8)); err != nil { - return err - } - if _, err = buf.WriteTo(w); err != nil { - return err - } - } - - ifd := []ifdEntry{ - {tImageWidth, dtShort, []uint32{uint32(d.X)}}, - {tImageLength, dtShort, []uint32{uint32(d.Y)}}, - {tBitsPerSample, dtShort, bitsPerSample}, - {tCompression, dtShort, []uint32{compression}}, - {tPhotometricInterpretation, dtShort, []uint32{photometricInterpretation}}, - {tStripOffsets, dtLong, []uint32{8}}, - {tSamplesPerPixel, dtShort, []uint32{samplesPerPixel}}, - {tRowsPerStrip, dtShort, []uint32{uint32(d.Y)}}, - {tStripByteCounts, dtLong, []uint32{uint32(imageLen)}}, - // There is currently no support for storing the image - // resolution, so give a bogus value of 72x72 dpi. - {tXResolution, dtRational, []uint32{72, 1}}, - {tYResolution, dtRational, []uint32{72, 1}}, - {tResolutionUnit, dtShort, []uint32{resPerInch}}, - } - if pr != prNone { - ifd = append(ifd, ifdEntry{tPredictor, dtShort, []uint32{pr}}) - } - if len(colorMap) != 0 { - ifd = append(ifd, ifdEntry{tColorMap, dtShort, colorMap}) - } - if extraSamples > 0 { - ifd = append(ifd, ifdEntry{tExtraSamples, dtShort, []uint32{extraSamples}}) - } - - return writeIFD(w, imageLen+8, ifd) -} diff --git a/vendor/modules.txt b/vendor/modules.txt index 612d8a0f7..52a61a714 100644 --- a/vendor/modules.txt +++ b/vendor/modules.txt @@ -175,9 +175,6 @@ github.com/coreos/go-systemd/v22/dbus # github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc ## explicit github.com/davecgh/go-spew/spew -# github.com/disintegration/imaging v1.6.2 -## explicit -github.com/disintegration/imaging # github.com/docker/go-units v0.5.0 ## explicit github.com/docker/go-units @@ -1095,11 +1092,7 @@ golang.org/x/exp/slog/internal golang.org/x/exp/slog/internal/buffer # golang.org/x/image v0.19.0 ## explicit; go 1.18 -golang.org/x/image/bmp -golang.org/x/image/ccitt golang.org/x/image/riff -golang.org/x/image/tiff -golang.org/x/image/tiff/lzw golang.org/x/image/vp8 golang.org/x/image/vp8l golang.org/x/image/webp |