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path: root/vendor/github.com/disintegration/imaging/scanner.go
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Diffstat (limited to 'vendor/github.com/disintegration/imaging/scanner.go')
-rw-r--r--vendor/github.com/disintegration/imaging/scanner.go285
1 files changed, 0 insertions, 285 deletions
diff --git a/vendor/github.com/disintegration/imaging/scanner.go b/vendor/github.com/disintegration/imaging/scanner.go
deleted file mode 100644
index 37d92cef..00000000
--- 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
- }
- }
- }
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 15:52:09 +0000