From 1329aa51b605cb54ba9aae3a82a0a87b881fb7b3 Mon Sep 17 00:00:00 2001 From: Christopher Speller Date: Mon, 13 Nov 2017 09:09:58 -0800 Subject: Updating server dependancies. (#7816) --- vendor/github.com/disintegration/imaging/clone.go | 312 ++++++++++++++++++++++ 1 file changed, 312 insertions(+) create mode 100644 vendor/github.com/disintegration/imaging/clone.go (limited to 'vendor/github.com/disintegration/imaging/clone.go') diff --git a/vendor/github.com/disintegration/imaging/clone.go b/vendor/github.com/disintegration/imaging/clone.go new file mode 100644 index 000000000..a22e01913 --- /dev/null +++ b/vendor/github.com/disintegration/imaging/clone.go @@ -0,0 +1,312 @@ +package imaging + +import ( + "image" + "image/color" +) + +// Clone returns a copy of the given image. +func Clone(img image.Image) *image.NRGBA { + dstBounds := img.Bounds().Sub(img.Bounds().Min) + dst := image.NewNRGBA(dstBounds) + + switch src := img.(type) { + case *image.NRGBA: + copyNRGBA(dst, src) + case *image.NRGBA64: + copyNRGBA64(dst, src) + case *image.RGBA: + copyRGBA(dst, src) + case *image.RGBA64: + copyRGBA64(dst, src) + case *image.Gray: + copyGray(dst, src) + case *image.Gray16: + copyGray16(dst, src) + case *image.YCbCr: + copyYCbCr(dst, src) + case *image.Paletted: + copyPaletted(dst, src) + default: + copyImage(dst, src) + } + + return dst +} + +func copyNRGBA(dst *image.NRGBA, src *image.NRGBA) { + srcMinX := src.Rect.Min.X + srcMinY := src.Rect.Min.Y + dstW := dst.Rect.Dx() + dstH := dst.Rect.Dy() + rowSize := dstW * 4 + parallel(dstH, func(partStart, partEnd int) { + for dstY := partStart; dstY < partEnd; dstY++ { + di := dst.PixOffset(0, dstY) + si := src.PixOffset(srcMinX, srcMinY+dstY) + copy(dst.Pix[di:di+rowSize], src.Pix[si:si+rowSize]) + } + }) +} + +func copyNRGBA64(dst *image.NRGBA, src *image.NRGBA64) { + srcMinX := src.Rect.Min.X + srcMinY := src.Rect.Min.Y + dstW := dst.Rect.Dx() + dstH := dst.Rect.Dy() + parallel(dstH, func(partStart, partEnd int) { + for dstY := partStart; dstY < partEnd; dstY++ { + di := dst.PixOffset(0, dstY) + si := src.PixOffset(srcMinX, srcMinY+dstY) + for dstX := 0; dstX < dstW; dstX++ { + dst.Pix[di+0] = src.Pix[si+0] + dst.Pix[di+1] = src.Pix[si+2] + dst.Pix[di+2] = src.Pix[si+4] + dst.Pix[di+3] = src.Pix[si+6] + di += 4 + si += 8 + } + } + }) +} + +func copyRGBA(dst *image.NRGBA, src *image.RGBA) { + srcMinX := src.Rect.Min.X + srcMinY := src.Rect.Min.Y + dstW := dst.Rect.Dx() + dstH := dst.Rect.Dy() + parallel(dstH, func(partStart, partEnd int) { + for dstY := partStart; dstY < partEnd; dstY++ { + di := dst.PixOffset(0, dstY) + si := src.PixOffset(srcMinX, srcMinY+dstY) + for dstX := 0; dstX < dstW; dstX++ { + a := src.Pix[si+3] + dst.Pix[di+3] = a + + switch a { + case 0: + dst.Pix[di+0] = 0 + dst.Pix[di+1] = 0 + dst.Pix[di+2] = 0 + case 0xff: + dst.Pix[di+0] = src.Pix[si+0] + dst.Pix[di+1] = src.Pix[si+1] + dst.Pix[di+2] = src.Pix[si+2] + default: + var tmp uint16 + tmp = uint16(src.Pix[si+0]) * 0xff / uint16(a) + dst.Pix[di+0] = uint8(tmp) + tmp = uint16(src.Pix[si+1]) * 0xff / uint16(a) + dst.Pix[di+1] = uint8(tmp) + tmp = uint16(src.Pix[si+2]) * 0xff / uint16(a) + dst.Pix[di+2] = uint8(tmp) + } + + di += 4 + si += 4 + } + } + }) +} + +func copyRGBA64(dst *image.NRGBA, src *image.RGBA64) { + srcMinX := src.Rect.Min.X + srcMinY := src.Rect.Min.Y + dstW := dst.Rect.Dx() + dstH := dst.Rect.Dy() + parallel(dstH, func(partStart, partEnd int) { + for dstY := partStart; dstY < partEnd; dstY++ { + di := dst.PixOffset(0, dstY) + si := src.PixOffset(srcMinX, srcMinY+dstY) + for dstX := 0; dstX < dstW; dstX++ { + a := src.Pix[si+6] + dst.Pix[di+3] = a + + switch a { + case 0: + dst.Pix[di+0] = 0 + dst.Pix[di+1] = 0 + dst.Pix[di+2] = 0 + case 0xff: + dst.Pix[di+0] = src.Pix[si+0] + dst.Pix[di+1] = src.Pix[si+2] + dst.Pix[di+2] = src.Pix[si+4] + default: + var tmp uint16 + tmp = uint16(src.Pix[si+0]) * 0xff / uint16(a) + dst.Pix[di+0] = uint8(tmp) + tmp = uint16(src.Pix[si+2]) * 0xff / uint16(a) + dst.Pix[di+1] = uint8(tmp) + tmp = uint16(src.Pix[si+4]) * 0xff / uint16(a) + dst.Pix[di+2] = uint8(tmp) + } + + di += 4 + si += 8 + } + } + }) +} + +func copyGray(dst *image.NRGBA, src *image.Gray) { + srcMinX := src.Rect.Min.X + srcMinY := src.Rect.Min.Y + dstW := dst.Rect.Dx() + dstH := dst.Rect.Dy() + parallel(dstH, func(partStart, partEnd int) { + for dstY := partStart; dstY < partEnd; dstY++ { + di := dst.PixOffset(0, dstY) + si := src.PixOffset(srcMinX, srcMinY+dstY) + for dstX := 0; dstX < dstW; dstX++ { + c := src.Pix[si] + dst.Pix[di+0] = c + dst.Pix[di+1] = c + dst.Pix[di+2] = c + dst.Pix[di+3] = 0xff + di += 4 + si++ + } + } + }) +} + +func copyGray16(dst *image.NRGBA, src *image.Gray16) { + srcMinX := src.Rect.Min.X + srcMinY := src.Rect.Min.Y + dstW := dst.Rect.Dx() + dstH := dst.Rect.Dy() + parallel(dstH, func(partStart, partEnd int) { + for dstY := partStart; dstY < partEnd; dstY++ { + di := dst.PixOffset(0, dstY) + si := src.PixOffset(srcMinX, srcMinY+dstY) + for dstX := 0; dstX < dstW; dstX++ { + c := src.Pix[si] + dst.Pix[di+0] = c + dst.Pix[di+1] = c + dst.Pix[di+2] = c + dst.Pix[di+3] = 0xff + di += 4 + si += 2 + } + } + }) +} + +func copyYCbCr(dst *image.NRGBA, src *image.YCbCr) { + srcMinX := src.Rect.Min.X + srcMinY := src.Rect.Min.Y + dstW := dst.Rect.Dx() + dstH := dst.Rect.Dy() + parallel(dstH, func(partStart, partEnd int) { + for dstY := partStart; dstY < partEnd; dstY++ { + srcY := srcMinY + dstY + di := dst.PixOffset(0, dstY) + for dstX := 0; dstX < dstW; dstX++ { + srcX := srcMinX + dstX + + siy := (srcY-srcMinY)*src.YStride + (srcX - srcMinX) + + var sic int + switch src.SubsampleRatio { + case image.YCbCrSubsampleRatio444: + sic = (srcY-srcMinY)*src.CStride + (srcX - srcMinX) + case image.YCbCrSubsampleRatio422: + sic = (srcY-srcMinY)*src.CStride + (srcX/2 - srcMinX/2) + case image.YCbCrSubsampleRatio420: + sic = (srcY/2-srcMinY/2)*src.CStride + (srcX/2 - srcMinX/2) + case image.YCbCrSubsampleRatio440: + sic = (srcY/2-srcMinY/2)*src.CStride + (srcX - srcMinX) + default: + sic = src.COffset(srcX, srcY) + } + + y := int32(src.Y[siy]) + cb := int32(src.Cb[sic]) - 128 + cr := int32(src.Cr[sic]) - 128 + + r := (y<<16 + 91881*cr + 1<<15) >> 16 + if r > 255 { + r = 255 + } else if r < 0 { + r = 0 + } + + g := (y<<16 - 22554*cb - 46802*cr + 1<<15) >> 16 + if g > 255 { + g = 255 + } else if g < 0 { + g = 0 + } + + b := (y<<16 + 116130*cb + 1<<15) >> 16 + if b > 255 { + b = 255 + } else if b < 0 { + b = 0 + } + + dst.Pix[di+0] = uint8(r) + dst.Pix[di+1] = uint8(g) + dst.Pix[di+2] = uint8(b) + dst.Pix[di+3] = 255 + + di += 4 + } + } + }) +} + +func copyPaletted(dst *image.NRGBA, src *image.Paletted) { + srcMinX := src.Rect.Min.X + srcMinY := src.Rect.Min.Y + dstW := dst.Rect.Dx() + dstH := dst.Rect.Dy() + plen := len(src.Palette) + pnew := make([]color.NRGBA, plen) + for i := 0; i < plen; i++ { + pnew[i] = color.NRGBAModel.Convert(src.Palette[i]).(color.NRGBA) + } + parallel(dstH, func(partStart, partEnd int) { + for dstY := partStart; dstY < partEnd; dstY++ { + di := dst.PixOffset(0, dstY) + si := src.PixOffset(srcMinX, srcMinY+dstY) + for dstX := 0; dstX < dstW; dstX++ { + c := pnew[src.Pix[si]] + dst.Pix[di+0] = c.R + dst.Pix[di+1] = c.G + dst.Pix[di+2] = c.B + dst.Pix[di+3] = c.A + di += 4 + si++ + } + } + }) +} + +func copyImage(dst *image.NRGBA, src image.Image) { + srcMinX := src.Bounds().Min.X + srcMinY := src.Bounds().Min.Y + dstW := dst.Bounds().Dx() + dstH := dst.Bounds().Dy() + parallel(dstH, func(partStart, partEnd int) { + for dstY := partStart; dstY < partEnd; dstY++ { + di := dst.PixOffset(0, dstY) + for dstX := 0; dstX < dstW; dstX++ { + c := color.NRGBAModel.Convert(src.At(srcMinX+dstX, srcMinY+dstY)).(color.NRGBA) + dst.Pix[di+0] = c.R + dst.Pix[di+1] = c.G + dst.Pix[di+2] = c.B + dst.Pix[di+3] = c.A + di += 4 + } + } + }) +} + +// toNRGBA converts any image type to *image.NRGBA with min-point at (0, 0). +func toNRGBA(img image.Image) *image.NRGBA { + if img, ok := img.(*image.NRGBA); ok && img.Bounds().Min.Eq(image.ZP) { + return img + } + return Clone(img) +} -- cgit v1.2.3-1-g7c22