| // generated by "go run gen.go". DO NOT EDIT. |
| |
| package draw |
| |
| import ( |
| "image" |
| "image/color" |
| ) |
| |
| func (z *nnScaler) Scale(dst Image, dp image.Point, src image.Image, sp image.Point) { |
| if z.dw <= 0 || z.dh <= 0 || z.sw <= 0 || z.sh <= 0 { |
| return |
| } |
| // dr is the affected destination pixels, relative to dp. |
| dr := dst.Bounds().Sub(dp).Intersect(image.Rectangle{Max: image.Point{int(z.dw), int(z.dh)}}) |
| if dr.Empty() { |
| return |
| } |
| // sr is the source pixels. If it extends beyond the src bounds, |
| // we cannot use the type-specific fast paths, as they access |
| // the Pix fields directly without bounds checking. |
| if sr := (image.Rectangle{sp, sp.Add(image.Point{int(z.sw), int(z.sh)})}); !sr.In(src.Bounds()) { |
| z.scale_Image_Image(dst, dp, dr, src, sp) |
| } else { |
| switch dst := dst.(type) { |
| case *image.RGBA: |
| switch src := src.(type) { |
| case *image.Gray: |
| z.scale_RGBA_Gray(dst, dp, dr, src, sp) |
| case *image.NRGBA: |
| z.scale_RGBA_NRGBA(dst, dp, dr, src, sp) |
| case *image.RGBA: |
| z.scale_RGBA_RGBA(dst, dp, dr, src, sp) |
| case *image.Uniform: |
| z.scale_RGBA_Uniform(dst, dp, dr, src, sp) |
| case *image.YCbCr: |
| z.scale_RGBA_YCbCr(dst, dp, dr, src, sp) |
| default: |
| z.scale_RGBA_Image(dst, dp, dr, src, sp) |
| } |
| default: |
| switch src := src.(type) { |
| default: |
| z.scale_Image_Image(dst, dp, dr, src, sp) |
| } |
| } |
| } |
| } |
| |
| func (z *nnScaler) scale_RGBA_Gray(dst *image.RGBA, dp image.Point, dr image.Rectangle, src *image.Gray, sp image.Point) { |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (2*uint64(dy) + 1) * uint64(z.sh) / (2 * uint64(z.dh)) |
| d := dst.PixOffset(dp.X+dr.Min.X, dp.Y+int(dy)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (2*uint64(dx) + 1) * uint64(z.sw) / (2 * uint64(z.dw)) |
| pr, pg, pb, pa := src.At(sp.X+int(sx), sp.Y+int(sy)).RGBA() |
| dst.Pix[d+0] = uint8(uint32(pr) >> 8) |
| dst.Pix[d+1] = uint8(uint32(pg) >> 8) |
| dst.Pix[d+2] = uint8(uint32(pb) >> 8) |
| dst.Pix[d+3] = uint8(uint32(pa) >> 8) |
| d += 4 |
| } |
| } |
| } |
| |
| func (z *nnScaler) scale_RGBA_NRGBA(dst *image.RGBA, dp image.Point, dr image.Rectangle, src *image.NRGBA, sp image.Point) { |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (2*uint64(dy) + 1) * uint64(z.sh) / (2 * uint64(z.dh)) |
| d := dst.PixOffset(dp.X+dr.Min.X, dp.Y+int(dy)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (2*uint64(dx) + 1) * uint64(z.sw) / (2 * uint64(z.dw)) |
| pr, pg, pb, pa := src.At(sp.X+int(sx), sp.Y+int(sy)).RGBA() |
| dst.Pix[d+0] = uint8(uint32(pr) >> 8) |
| dst.Pix[d+1] = uint8(uint32(pg) >> 8) |
| dst.Pix[d+2] = uint8(uint32(pb) >> 8) |
| dst.Pix[d+3] = uint8(uint32(pa) >> 8) |
| d += 4 |
| } |
| } |
| } |
| |
| func (z *nnScaler) scale_RGBA_RGBA(dst *image.RGBA, dp image.Point, dr image.Rectangle, src *image.RGBA, sp image.Point) { |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (2*uint64(dy) + 1) * uint64(z.sh) / (2 * uint64(z.dh)) |
| d := dst.PixOffset(dp.X+dr.Min.X, dp.Y+int(dy)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (2*uint64(dx) + 1) * uint64(z.sw) / (2 * uint64(z.dw)) |
| pi := src.PixOffset(sp.X+int(sx), sp.Y+int(sy)) |
| pr := uint32(src.Pix[pi+0]) * 0x101 |
| pg := uint32(src.Pix[pi+1]) * 0x101 |
| pb := uint32(src.Pix[pi+2]) * 0x101 |
| pa := uint32(src.Pix[pi+3]) * 0x101 |
| dst.Pix[d+0] = uint8(uint32(pr) >> 8) |
| dst.Pix[d+1] = uint8(uint32(pg) >> 8) |
| dst.Pix[d+2] = uint8(uint32(pb) >> 8) |
| dst.Pix[d+3] = uint8(uint32(pa) >> 8) |
| d += 4 |
| } |
| } |
| } |
| |
| func (z *nnScaler) scale_RGBA_Uniform(dst *image.RGBA, dp image.Point, dr image.Rectangle, src *image.Uniform, sp image.Point) { |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (2*uint64(dy) + 1) * uint64(z.sh) / (2 * uint64(z.dh)) |
| d := dst.PixOffset(dp.X+dr.Min.X, dp.Y+int(dy)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (2*uint64(dx) + 1) * uint64(z.sw) / (2 * uint64(z.dw)) |
| pr, pg, pb, pa := src.At(sp.X+int(sx), sp.Y+int(sy)).RGBA() |
| dst.Pix[d+0] = uint8(uint32(pr) >> 8) |
| dst.Pix[d+1] = uint8(uint32(pg) >> 8) |
| dst.Pix[d+2] = uint8(uint32(pb) >> 8) |
| dst.Pix[d+3] = uint8(uint32(pa) >> 8) |
| d += 4 |
| } |
| } |
| } |
| |
| func (z *nnScaler) scale_RGBA_YCbCr(dst *image.RGBA, dp image.Point, dr image.Rectangle, src *image.YCbCr, sp image.Point) { |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (2*uint64(dy) + 1) * uint64(z.sh) / (2 * uint64(z.dh)) |
| d := dst.PixOffset(dp.X+dr.Min.X, dp.Y+int(dy)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (2*uint64(dx) + 1) * uint64(z.sw) / (2 * uint64(z.dw)) |
| pr, pg, pb, pa := src.At(sp.X+int(sx), sp.Y+int(sy)).RGBA() |
| dst.Pix[d+0] = uint8(uint32(pr) >> 8) |
| dst.Pix[d+1] = uint8(uint32(pg) >> 8) |
| dst.Pix[d+2] = uint8(uint32(pb) >> 8) |
| dst.Pix[d+3] = uint8(uint32(pa) >> 8) |
| d += 4 |
| } |
| } |
| } |
| |
| func (z *nnScaler) scale_RGBA_Image(dst *image.RGBA, dp image.Point, dr image.Rectangle, src image.Image, sp image.Point) { |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (2*uint64(dy) + 1) * uint64(z.sh) / (2 * uint64(z.dh)) |
| d := dst.PixOffset(dp.X+dr.Min.X, dp.Y+int(dy)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (2*uint64(dx) + 1) * uint64(z.sw) / (2 * uint64(z.dw)) |
| pr, pg, pb, pa := src.At(sp.X+int(sx), sp.Y+int(sy)).RGBA() |
| dst.Pix[d+0] = uint8(uint32(pr) >> 8) |
| dst.Pix[d+1] = uint8(uint32(pg) >> 8) |
| dst.Pix[d+2] = uint8(uint32(pb) >> 8) |
| dst.Pix[d+3] = uint8(uint32(pa) >> 8) |
| d += 4 |
| } |
| } |
| } |
| |
| func (z *nnScaler) scale_Image_Image(dst Image, dp image.Point, dr image.Rectangle, src image.Image, sp image.Point) { |
| dstColorRGBA64 := &color.RGBA64{} |
| dstColor := color.Color(dstColorRGBA64) |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (2*uint64(dy) + 1) * uint64(z.sh) / (2 * uint64(z.dh)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (2*uint64(dx) + 1) * uint64(z.sw) / (2 * uint64(z.dw)) |
| pr, pg, pb, pa := src.At(sp.X+int(sx), sp.Y+int(sy)).RGBA() |
| dstColorRGBA64.R = uint16(pr) |
| dstColorRGBA64.G = uint16(pg) |
| dstColorRGBA64.B = uint16(pb) |
| dstColorRGBA64.A = uint16(pa) |
| dst.Set(dp.X+int(dx), dp.Y+int(dy), dstColor) |
| } |
| } |
| } |
| |
| func (z *ablScaler) Scale(dst Image, dp image.Point, src image.Image, sp image.Point) { |
| if z.dw <= 0 || z.dh <= 0 || z.sw <= 0 || z.sh <= 0 { |
| return |
| } |
| // dr is the affected destination pixels, relative to dp. |
| dr := dst.Bounds().Sub(dp).Intersect(image.Rectangle{Max: image.Point{int(z.dw), int(z.dh)}}) |
| if dr.Empty() { |
| return |
| } |
| // sr is the source pixels. If it extends beyond the src bounds, |
| // we cannot use the type-specific fast paths, as they access |
| // the Pix fields directly without bounds checking. |
| if sr := (image.Rectangle{sp, sp.Add(image.Point{int(z.sw), int(z.sh)})}); !sr.In(src.Bounds()) { |
| z.scale_Image_Image(dst, dp, dr, src, sp) |
| } else { |
| switch dst := dst.(type) { |
| case *image.RGBA: |
| switch src := src.(type) { |
| case *image.Gray: |
| z.scale_RGBA_Gray(dst, dp, dr, src, sp) |
| case *image.NRGBA: |
| z.scale_RGBA_NRGBA(dst, dp, dr, src, sp) |
| case *image.RGBA: |
| z.scale_RGBA_RGBA(dst, dp, dr, src, sp) |
| case *image.Uniform: |
| z.scale_RGBA_Uniform(dst, dp, dr, src, sp) |
| case *image.YCbCr: |
| z.scale_RGBA_YCbCr(dst, dp, dr, src, sp) |
| default: |
| z.scale_RGBA_Image(dst, dp, dr, src, sp) |
| } |
| default: |
| switch src := src.(type) { |
| default: |
| z.scale_Image_Image(dst, dp, dr, src, sp) |
| } |
| } |
| } |
| } |
| |
| func (z *ablScaler) scale_RGBA_Gray(dst *image.RGBA, dp image.Point, dr image.Rectangle, src *image.Gray, sp image.Point) { |
| yscale := float64(z.sh) / float64(z.dh) |
| xscale := float64(z.sw) / float64(z.dw) |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (float64(dy)+0.5)*yscale - 0.5 |
| sy0 := int32(sy) |
| yFrac0 := sy - float64(sy0) |
| yFrac1 := 1 - yFrac0 |
| sy1 := sy0 + 1 |
| if sy < 0 { |
| sy0, sy1 = 0, 0 |
| yFrac0, yFrac1 = 0, 1 |
| } else if sy1 >= z.sh { |
| sy1 = sy0 |
| yFrac0, yFrac1 = 1, 0 |
| } |
| d := dst.PixOffset(dp.X+dr.Min.X, dp.Y+int(dy)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (float64(dx)+0.5)*xscale - 0.5 |
| sx0 := int32(sx) |
| xFrac0 := sx - float64(sx0) |
| xFrac1 := 1 - xFrac0 |
| sx1 := sx0 + 1 |
| if sx < 0 { |
| sx0, sx1 = 0, 0 |
| xFrac0, xFrac1 = 0, 1 |
| } else if sx1 >= z.sw { |
| sx1 = sx0 |
| xFrac0, xFrac1 = 1, 0 |
| } |
| s00ru, s00gu, s00bu, s00au := src.At(sp.X+int(sx0), sp.Y+int(sy0)).RGBA() |
| s00r := float64(s00ru) |
| s00g := float64(s00gu) |
| s00b := float64(s00bu) |
| s00a := float64(s00au) |
| s10ru, s10gu, s10bu, s10au := src.At(sp.X+int(sx1), sp.Y+int(sy0)).RGBA() |
| s10r := float64(s10ru) |
| s10g := float64(s10gu) |
| s10b := float64(s10bu) |
| s10a := float64(s10au) |
| s10r = xFrac1*s00r + xFrac0*s10r |
| s10g = xFrac1*s00g + xFrac0*s10g |
| s10b = xFrac1*s00b + xFrac0*s10b |
| s10a = xFrac1*s00a + xFrac0*s10a |
| s01ru, s01gu, s01bu, s01au := src.At(sp.X+int(sx0), sp.Y+int(sy1)).RGBA() |
| s01r := float64(s01ru) |
| s01g := float64(s01gu) |
| s01b := float64(s01bu) |
| s01a := float64(s01au) |
| s11ru, s11gu, s11bu, s11au := src.At(sp.X+int(sx1), sp.Y+int(sy1)).RGBA() |
| s11r := float64(s11ru) |
| s11g := float64(s11gu) |
| s11b := float64(s11bu) |
| s11a := float64(s11au) |
| s11r = xFrac1*s01r + xFrac0*s11r |
| s11g = xFrac1*s01g + xFrac0*s11g |
| s11b = xFrac1*s01b + xFrac0*s11b |
| s11a = xFrac1*s01a + xFrac0*s11a |
| s11r = yFrac1*s10r + yFrac0*s11r |
| s11g = yFrac1*s10g + yFrac0*s11g |
| s11b = yFrac1*s10b + yFrac0*s11b |
| s11a = yFrac1*s10a + yFrac0*s11a |
| dst.Pix[d+0] = uint8(uint32(s11r) >> 8) |
| dst.Pix[d+1] = uint8(uint32(s11g) >> 8) |
| dst.Pix[d+2] = uint8(uint32(s11b) >> 8) |
| dst.Pix[d+3] = uint8(uint32(s11a) >> 8) |
| d += 4 |
| } |
| } |
| } |
| |
| func (z *ablScaler) scale_RGBA_NRGBA(dst *image.RGBA, dp image.Point, dr image.Rectangle, src *image.NRGBA, sp image.Point) { |
| yscale := float64(z.sh) / float64(z.dh) |
| xscale := float64(z.sw) / float64(z.dw) |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (float64(dy)+0.5)*yscale - 0.5 |
| sy0 := int32(sy) |
| yFrac0 := sy - float64(sy0) |
| yFrac1 := 1 - yFrac0 |
| sy1 := sy0 + 1 |
| if sy < 0 { |
| sy0, sy1 = 0, 0 |
| yFrac0, yFrac1 = 0, 1 |
| } else if sy1 >= z.sh { |
| sy1 = sy0 |
| yFrac0, yFrac1 = 1, 0 |
| } |
| d := dst.PixOffset(dp.X+dr.Min.X, dp.Y+int(dy)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (float64(dx)+0.5)*xscale - 0.5 |
| sx0 := int32(sx) |
| xFrac0 := sx - float64(sx0) |
| xFrac1 := 1 - xFrac0 |
| sx1 := sx0 + 1 |
| if sx < 0 { |
| sx0, sx1 = 0, 0 |
| xFrac0, xFrac1 = 0, 1 |
| } else if sx1 >= z.sw { |
| sx1 = sx0 |
| xFrac0, xFrac1 = 1, 0 |
| } |
| s00ru, s00gu, s00bu, s00au := src.At(sp.X+int(sx0), sp.Y+int(sy0)).RGBA() |
| s00r := float64(s00ru) |
| s00g := float64(s00gu) |
| s00b := float64(s00bu) |
| s00a := float64(s00au) |
| s10ru, s10gu, s10bu, s10au := src.At(sp.X+int(sx1), sp.Y+int(sy0)).RGBA() |
| s10r := float64(s10ru) |
| s10g := float64(s10gu) |
| s10b := float64(s10bu) |
| s10a := float64(s10au) |
| s10r = xFrac1*s00r + xFrac0*s10r |
| s10g = xFrac1*s00g + xFrac0*s10g |
| s10b = xFrac1*s00b + xFrac0*s10b |
| s10a = xFrac1*s00a + xFrac0*s10a |
| s01ru, s01gu, s01bu, s01au := src.At(sp.X+int(sx0), sp.Y+int(sy1)).RGBA() |
| s01r := float64(s01ru) |
| s01g := float64(s01gu) |
| s01b := float64(s01bu) |
| s01a := float64(s01au) |
| s11ru, s11gu, s11bu, s11au := src.At(sp.X+int(sx1), sp.Y+int(sy1)).RGBA() |
| s11r := float64(s11ru) |
| s11g := float64(s11gu) |
| s11b := float64(s11bu) |
| s11a := float64(s11au) |
| s11r = xFrac1*s01r + xFrac0*s11r |
| s11g = xFrac1*s01g + xFrac0*s11g |
| s11b = xFrac1*s01b + xFrac0*s11b |
| s11a = xFrac1*s01a + xFrac0*s11a |
| s11r = yFrac1*s10r + yFrac0*s11r |
| s11g = yFrac1*s10g + yFrac0*s11g |
| s11b = yFrac1*s10b + yFrac0*s11b |
| s11a = yFrac1*s10a + yFrac0*s11a |
| dst.Pix[d+0] = uint8(uint32(s11r) >> 8) |
| dst.Pix[d+1] = uint8(uint32(s11g) >> 8) |
| dst.Pix[d+2] = uint8(uint32(s11b) >> 8) |
| dst.Pix[d+3] = uint8(uint32(s11a) >> 8) |
| d += 4 |
| } |
| } |
| } |
| |
| func (z *ablScaler) scale_RGBA_RGBA(dst *image.RGBA, dp image.Point, dr image.Rectangle, src *image.RGBA, sp image.Point) { |
| yscale := float64(z.sh) / float64(z.dh) |
| xscale := float64(z.sw) / float64(z.dw) |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (float64(dy)+0.5)*yscale - 0.5 |
| sy0 := int32(sy) |
| yFrac0 := sy - float64(sy0) |
| yFrac1 := 1 - yFrac0 |
| sy1 := sy0 + 1 |
| if sy < 0 { |
| sy0, sy1 = 0, 0 |
| yFrac0, yFrac1 = 0, 1 |
| } else if sy1 >= z.sh { |
| sy1 = sy0 |
| yFrac0, yFrac1 = 1, 0 |
| } |
| d := dst.PixOffset(dp.X+dr.Min.X, dp.Y+int(dy)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (float64(dx)+0.5)*xscale - 0.5 |
| sx0 := int32(sx) |
| xFrac0 := sx - float64(sx0) |
| xFrac1 := 1 - xFrac0 |
| sx1 := sx0 + 1 |
| if sx < 0 { |
| sx0, sx1 = 0, 0 |
| xFrac0, xFrac1 = 0, 1 |
| } else if sx1 >= z.sw { |
| sx1 = sx0 |
| xFrac0, xFrac1 = 1, 0 |
| } |
| s00i := src.PixOffset(sp.X+int(sx0), sp.Y+int(sy0)) |
| s00ru := uint32(src.Pix[s00i+0]) * 0x101 |
| s00gu := uint32(src.Pix[s00i+1]) * 0x101 |
| s00bu := uint32(src.Pix[s00i+2]) * 0x101 |
| s00au := uint32(src.Pix[s00i+3]) * 0x101 |
| s00r := float64(s00ru) |
| s00g := float64(s00gu) |
| s00b := float64(s00bu) |
| s00a := float64(s00au) |
| s10i := src.PixOffset(sp.X+int(sx1), sp.Y+int(sy0)) |
| s10ru := uint32(src.Pix[s10i+0]) * 0x101 |
| s10gu := uint32(src.Pix[s10i+1]) * 0x101 |
| s10bu := uint32(src.Pix[s10i+2]) * 0x101 |
| s10au := uint32(src.Pix[s10i+3]) * 0x101 |
| s10r := float64(s10ru) |
| s10g := float64(s10gu) |
| s10b := float64(s10bu) |
| s10a := float64(s10au) |
| s10r = xFrac1*s00r + xFrac0*s10r |
| s10g = xFrac1*s00g + xFrac0*s10g |
| s10b = xFrac1*s00b + xFrac0*s10b |
| s10a = xFrac1*s00a + xFrac0*s10a |
| s01i := src.PixOffset(sp.X+int(sx0), sp.Y+int(sy1)) |
| s01ru := uint32(src.Pix[s01i+0]) * 0x101 |
| s01gu := uint32(src.Pix[s01i+1]) * 0x101 |
| s01bu := uint32(src.Pix[s01i+2]) * 0x101 |
| s01au := uint32(src.Pix[s01i+3]) * 0x101 |
| s01r := float64(s01ru) |
| s01g := float64(s01gu) |
| s01b := float64(s01bu) |
| s01a := float64(s01au) |
| s11i := src.PixOffset(sp.X+int(sx1), sp.Y+int(sy1)) |
| s11ru := uint32(src.Pix[s11i+0]) * 0x101 |
| s11gu := uint32(src.Pix[s11i+1]) * 0x101 |
| s11bu := uint32(src.Pix[s11i+2]) * 0x101 |
| s11au := uint32(src.Pix[s11i+3]) * 0x101 |
| s11r := float64(s11ru) |
| s11g := float64(s11gu) |
| s11b := float64(s11bu) |
| s11a := float64(s11au) |
| s11r = xFrac1*s01r + xFrac0*s11r |
| s11g = xFrac1*s01g + xFrac0*s11g |
| s11b = xFrac1*s01b + xFrac0*s11b |
| s11a = xFrac1*s01a + xFrac0*s11a |
| s11r = yFrac1*s10r + yFrac0*s11r |
| s11g = yFrac1*s10g + yFrac0*s11g |
| s11b = yFrac1*s10b + yFrac0*s11b |
| s11a = yFrac1*s10a + yFrac0*s11a |
| dst.Pix[d+0] = uint8(uint32(s11r) >> 8) |
| dst.Pix[d+1] = uint8(uint32(s11g) >> 8) |
| dst.Pix[d+2] = uint8(uint32(s11b) >> 8) |
| dst.Pix[d+3] = uint8(uint32(s11a) >> 8) |
| d += 4 |
| } |
| } |
| } |
| |
| func (z *ablScaler) scale_RGBA_Uniform(dst *image.RGBA, dp image.Point, dr image.Rectangle, src *image.Uniform, sp image.Point) { |
| yscale := float64(z.sh) / float64(z.dh) |
| xscale := float64(z.sw) / float64(z.dw) |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (float64(dy)+0.5)*yscale - 0.5 |
| sy0 := int32(sy) |
| yFrac0 := sy - float64(sy0) |
| yFrac1 := 1 - yFrac0 |
| sy1 := sy0 + 1 |
| if sy < 0 { |
| sy0, sy1 = 0, 0 |
| yFrac0, yFrac1 = 0, 1 |
| } else if sy1 >= z.sh { |
| sy1 = sy0 |
| yFrac0, yFrac1 = 1, 0 |
| } |
| d := dst.PixOffset(dp.X+dr.Min.X, dp.Y+int(dy)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (float64(dx)+0.5)*xscale - 0.5 |
| sx0 := int32(sx) |
| xFrac0 := sx - float64(sx0) |
| xFrac1 := 1 - xFrac0 |
| sx1 := sx0 + 1 |
| if sx < 0 { |
| sx0, sx1 = 0, 0 |
| xFrac0, xFrac1 = 0, 1 |
| } else if sx1 >= z.sw { |
| sx1 = sx0 |
| xFrac0, xFrac1 = 1, 0 |
| } |
| s00ru, s00gu, s00bu, s00au := src.At(sp.X+int(sx0), sp.Y+int(sy0)).RGBA() |
| s00r := float64(s00ru) |
| s00g := float64(s00gu) |
| s00b := float64(s00bu) |
| s00a := float64(s00au) |
| s10ru, s10gu, s10bu, s10au := src.At(sp.X+int(sx1), sp.Y+int(sy0)).RGBA() |
| s10r := float64(s10ru) |
| s10g := float64(s10gu) |
| s10b := float64(s10bu) |
| s10a := float64(s10au) |
| s10r = xFrac1*s00r + xFrac0*s10r |
| s10g = xFrac1*s00g + xFrac0*s10g |
| s10b = xFrac1*s00b + xFrac0*s10b |
| s10a = xFrac1*s00a + xFrac0*s10a |
| s01ru, s01gu, s01bu, s01au := src.At(sp.X+int(sx0), sp.Y+int(sy1)).RGBA() |
| s01r := float64(s01ru) |
| s01g := float64(s01gu) |
| s01b := float64(s01bu) |
| s01a := float64(s01au) |
| s11ru, s11gu, s11bu, s11au := src.At(sp.X+int(sx1), sp.Y+int(sy1)).RGBA() |
| s11r := float64(s11ru) |
| s11g := float64(s11gu) |
| s11b := float64(s11bu) |
| s11a := float64(s11au) |
| s11r = xFrac1*s01r + xFrac0*s11r |
| s11g = xFrac1*s01g + xFrac0*s11g |
| s11b = xFrac1*s01b + xFrac0*s11b |
| s11a = xFrac1*s01a + xFrac0*s11a |
| s11r = yFrac1*s10r + yFrac0*s11r |
| s11g = yFrac1*s10g + yFrac0*s11g |
| s11b = yFrac1*s10b + yFrac0*s11b |
| s11a = yFrac1*s10a + yFrac0*s11a |
| dst.Pix[d+0] = uint8(uint32(s11r) >> 8) |
| dst.Pix[d+1] = uint8(uint32(s11g) >> 8) |
| dst.Pix[d+2] = uint8(uint32(s11b) >> 8) |
| dst.Pix[d+3] = uint8(uint32(s11a) >> 8) |
| d += 4 |
| } |
| } |
| } |
| |
| func (z *ablScaler) scale_RGBA_YCbCr(dst *image.RGBA, dp image.Point, dr image.Rectangle, src *image.YCbCr, sp image.Point) { |
| yscale := float64(z.sh) / float64(z.dh) |
| xscale := float64(z.sw) / float64(z.dw) |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (float64(dy)+0.5)*yscale - 0.5 |
| sy0 := int32(sy) |
| yFrac0 := sy - float64(sy0) |
| yFrac1 := 1 - yFrac0 |
| sy1 := sy0 + 1 |
| if sy < 0 { |
| sy0, sy1 = 0, 0 |
| yFrac0, yFrac1 = 0, 1 |
| } else if sy1 >= z.sh { |
| sy1 = sy0 |
| yFrac0, yFrac1 = 1, 0 |
| } |
| d := dst.PixOffset(dp.X+dr.Min.X, dp.Y+int(dy)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (float64(dx)+0.5)*xscale - 0.5 |
| sx0 := int32(sx) |
| xFrac0 := sx - float64(sx0) |
| xFrac1 := 1 - xFrac0 |
| sx1 := sx0 + 1 |
| if sx < 0 { |
| sx0, sx1 = 0, 0 |
| xFrac0, xFrac1 = 0, 1 |
| } else if sx1 >= z.sw { |
| sx1 = sx0 |
| xFrac0, xFrac1 = 1, 0 |
| } |
| s00ru, s00gu, s00bu, s00au := src.At(sp.X+int(sx0), sp.Y+int(sy0)).RGBA() |
| s00r := float64(s00ru) |
| s00g := float64(s00gu) |
| s00b := float64(s00bu) |
| s00a := float64(s00au) |
| s10ru, s10gu, s10bu, s10au := src.At(sp.X+int(sx1), sp.Y+int(sy0)).RGBA() |
| s10r := float64(s10ru) |
| s10g := float64(s10gu) |
| s10b := float64(s10bu) |
| s10a := float64(s10au) |
| s10r = xFrac1*s00r + xFrac0*s10r |
| s10g = xFrac1*s00g + xFrac0*s10g |
| s10b = xFrac1*s00b + xFrac0*s10b |
| s10a = xFrac1*s00a + xFrac0*s10a |
| s01ru, s01gu, s01bu, s01au := src.At(sp.X+int(sx0), sp.Y+int(sy1)).RGBA() |
| s01r := float64(s01ru) |
| s01g := float64(s01gu) |
| s01b := float64(s01bu) |
| s01a := float64(s01au) |
| s11ru, s11gu, s11bu, s11au := src.At(sp.X+int(sx1), sp.Y+int(sy1)).RGBA() |
| s11r := float64(s11ru) |
| s11g := float64(s11gu) |
| s11b := float64(s11bu) |
| s11a := float64(s11au) |
| s11r = xFrac1*s01r + xFrac0*s11r |
| s11g = xFrac1*s01g + xFrac0*s11g |
| s11b = xFrac1*s01b + xFrac0*s11b |
| s11a = xFrac1*s01a + xFrac0*s11a |
| s11r = yFrac1*s10r + yFrac0*s11r |
| s11g = yFrac1*s10g + yFrac0*s11g |
| s11b = yFrac1*s10b + yFrac0*s11b |
| s11a = yFrac1*s10a + yFrac0*s11a |
| dst.Pix[d+0] = uint8(uint32(s11r) >> 8) |
| dst.Pix[d+1] = uint8(uint32(s11g) >> 8) |
| dst.Pix[d+2] = uint8(uint32(s11b) >> 8) |
| dst.Pix[d+3] = uint8(uint32(s11a) >> 8) |
| d += 4 |
| } |
| } |
| } |
| |
| func (z *ablScaler) scale_RGBA_Image(dst *image.RGBA, dp image.Point, dr image.Rectangle, src image.Image, sp image.Point) { |
| yscale := float64(z.sh) / float64(z.dh) |
| xscale := float64(z.sw) / float64(z.dw) |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (float64(dy)+0.5)*yscale - 0.5 |
| sy0 := int32(sy) |
| yFrac0 := sy - float64(sy0) |
| yFrac1 := 1 - yFrac0 |
| sy1 := sy0 + 1 |
| if sy < 0 { |
| sy0, sy1 = 0, 0 |
| yFrac0, yFrac1 = 0, 1 |
| } else if sy1 >= z.sh { |
| sy1 = sy0 |
| yFrac0, yFrac1 = 1, 0 |
| } |
| d := dst.PixOffset(dp.X+dr.Min.X, dp.Y+int(dy)) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (float64(dx)+0.5)*xscale - 0.5 |
| sx0 := int32(sx) |
| xFrac0 := sx - float64(sx0) |
| xFrac1 := 1 - xFrac0 |
| sx1 := sx0 + 1 |
| if sx < 0 { |
| sx0, sx1 = 0, 0 |
| xFrac0, xFrac1 = 0, 1 |
| } else if sx1 >= z.sw { |
| sx1 = sx0 |
| xFrac0, xFrac1 = 1, 0 |
| } |
| s00ru, s00gu, s00bu, s00au := src.At(sp.X+int(sx0), sp.Y+int(sy0)).RGBA() |
| s00r := float64(s00ru) |
| s00g := float64(s00gu) |
| s00b := float64(s00bu) |
| s00a := float64(s00au) |
| s10ru, s10gu, s10bu, s10au := src.At(sp.X+int(sx1), sp.Y+int(sy0)).RGBA() |
| s10r := float64(s10ru) |
| s10g := float64(s10gu) |
| s10b := float64(s10bu) |
| s10a := float64(s10au) |
| s10r = xFrac1*s00r + xFrac0*s10r |
| s10g = xFrac1*s00g + xFrac0*s10g |
| s10b = xFrac1*s00b + xFrac0*s10b |
| s10a = xFrac1*s00a + xFrac0*s10a |
| s01ru, s01gu, s01bu, s01au := src.At(sp.X+int(sx0), sp.Y+int(sy1)).RGBA() |
| s01r := float64(s01ru) |
| s01g := float64(s01gu) |
| s01b := float64(s01bu) |
| s01a := float64(s01au) |
| s11ru, s11gu, s11bu, s11au := src.At(sp.X+int(sx1), sp.Y+int(sy1)).RGBA() |
| s11r := float64(s11ru) |
| s11g := float64(s11gu) |
| s11b := float64(s11bu) |
| s11a := float64(s11au) |
| s11r = xFrac1*s01r + xFrac0*s11r |
| s11g = xFrac1*s01g + xFrac0*s11g |
| s11b = xFrac1*s01b + xFrac0*s11b |
| s11a = xFrac1*s01a + xFrac0*s11a |
| s11r = yFrac1*s10r + yFrac0*s11r |
| s11g = yFrac1*s10g + yFrac0*s11g |
| s11b = yFrac1*s10b + yFrac0*s11b |
| s11a = yFrac1*s10a + yFrac0*s11a |
| dst.Pix[d+0] = uint8(uint32(s11r) >> 8) |
| dst.Pix[d+1] = uint8(uint32(s11g) >> 8) |
| dst.Pix[d+2] = uint8(uint32(s11b) >> 8) |
| dst.Pix[d+3] = uint8(uint32(s11a) >> 8) |
| d += 4 |
| } |
| } |
| } |
| |
| func (z *ablScaler) scale_Image_Image(dst Image, dp image.Point, dr image.Rectangle, src image.Image, sp image.Point) { |
| yscale := float64(z.sh) / float64(z.dh) |
| xscale := float64(z.sw) / float64(z.dw) |
| dstColorRGBA64 := &color.RGBA64{} |
| dstColor := color.Color(dstColorRGBA64) |
| for dy := int32(dr.Min.Y); dy < int32(dr.Max.Y); dy++ { |
| sy := (float64(dy)+0.5)*yscale - 0.5 |
| sy0 := int32(sy) |
| yFrac0 := sy - float64(sy0) |
| yFrac1 := 1 - yFrac0 |
| sy1 := sy0 + 1 |
| if sy < 0 { |
| sy0, sy1 = 0, 0 |
| yFrac0, yFrac1 = 0, 1 |
| } else if sy1 >= z.sh { |
| sy1 = sy0 |
| yFrac0, yFrac1 = 1, 0 |
| } |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| sx := (float64(dx)+0.5)*xscale - 0.5 |
| sx0 := int32(sx) |
| xFrac0 := sx - float64(sx0) |
| xFrac1 := 1 - xFrac0 |
| sx1 := sx0 + 1 |
| if sx < 0 { |
| sx0, sx1 = 0, 0 |
| xFrac0, xFrac1 = 0, 1 |
| } else if sx1 >= z.sw { |
| sx1 = sx0 |
| xFrac0, xFrac1 = 1, 0 |
| } |
| s00ru, s00gu, s00bu, s00au := src.At(sp.X+int(sx0), sp.Y+int(sy0)).RGBA() |
| s00r := float64(s00ru) |
| s00g := float64(s00gu) |
| s00b := float64(s00bu) |
| s00a := float64(s00au) |
| s10ru, s10gu, s10bu, s10au := src.At(sp.X+int(sx1), sp.Y+int(sy0)).RGBA() |
| s10r := float64(s10ru) |
| s10g := float64(s10gu) |
| s10b := float64(s10bu) |
| s10a := float64(s10au) |
| s10r = xFrac1*s00r + xFrac0*s10r |
| s10g = xFrac1*s00g + xFrac0*s10g |
| s10b = xFrac1*s00b + xFrac0*s10b |
| s10a = xFrac1*s00a + xFrac0*s10a |
| s01ru, s01gu, s01bu, s01au := src.At(sp.X+int(sx0), sp.Y+int(sy1)).RGBA() |
| s01r := float64(s01ru) |
| s01g := float64(s01gu) |
| s01b := float64(s01bu) |
| s01a := float64(s01au) |
| s11ru, s11gu, s11bu, s11au := src.At(sp.X+int(sx1), sp.Y+int(sy1)).RGBA() |
| s11r := float64(s11ru) |
| s11g := float64(s11gu) |
| s11b := float64(s11bu) |
| s11a := float64(s11au) |
| s11r = xFrac1*s01r + xFrac0*s11r |
| s11g = xFrac1*s01g + xFrac0*s11g |
| s11b = xFrac1*s01b + xFrac0*s11b |
| s11a = xFrac1*s01a + xFrac0*s11a |
| s11r = yFrac1*s10r + yFrac0*s11r |
| s11g = yFrac1*s10g + yFrac0*s11g |
| s11b = yFrac1*s10b + yFrac0*s11b |
| s11a = yFrac1*s10a + yFrac0*s11a |
| dstColorRGBA64.R = uint16(s11r) |
| dstColorRGBA64.G = uint16(s11g) |
| dstColorRGBA64.B = uint16(s11b) |
| dstColorRGBA64.A = uint16(s11a) |
| dst.Set(dp.X+int(dx), dp.Y+int(dy), dstColor) |
| } |
| } |
| } |
| |
| func (z *kernelScaler) Scale(dst Image, dp image.Point, src image.Image, sp image.Point) { |
| if z.dw <= 0 || z.dh <= 0 || z.sw <= 0 || z.sh <= 0 { |
| return |
| } |
| // dr is the affected destination pixels, relative to dp. |
| dr := dst.Bounds().Sub(dp).Intersect(image.Rectangle{Max: image.Point{int(z.dw), int(z.dh)}}) |
| if dr.Empty() { |
| return |
| } |
| // Create a temporary buffer: |
| // scaleX distributes the source image's columns over the temporary image. |
| // scaleY distributes the temporary image's rows over the destination image. |
| // TODO: is it worth having a sync.Pool for this temporary buffer? |
| tmp := make([][4]float64, z.dw*z.sh) |
| |
| // sr is the source pixels. If it extends beyond the src bounds, |
| // we cannot use the type-specific fast paths, as they access |
| // the Pix fields directly without bounds checking. |
| if sr := (image.Rectangle{sp, sp.Add(image.Point{int(z.sw), int(z.sh)})}); !sr.In(src.Bounds()) { |
| z.scaleX_Image(tmp, src, sp) |
| } else { |
| switch src := src.(type) { |
| case *image.Gray: |
| z.scaleX_Gray(tmp, src, sp) |
| case *image.NRGBA: |
| z.scaleX_NRGBA(tmp, src, sp) |
| case *image.RGBA: |
| z.scaleX_RGBA(tmp, src, sp) |
| case *image.Uniform: |
| z.scaleX_Uniform(tmp, src, sp) |
| case *image.YCbCr: |
| z.scaleX_YCbCr(tmp, src, sp) |
| default: |
| z.scaleX_Image(tmp, src, sp) |
| } |
| } |
| |
| switch dst := dst.(type) { |
| case *image.RGBA: |
| z.scaleY_RGBA(dst, dp, dr, tmp) |
| default: |
| z.scaleY_Image(dst, dp, dr, tmp) |
| } |
| } |
| |
| func (z *kernelScaler) scaleX_Gray(tmp [][4]float64, src *image.Gray, sp image.Point) { |
| t := 0 |
| for y := int32(0); y < z.sh; y++ { |
| for _, s := range z.horizontal.sources { |
| var pr, pg, pb, pa float64 |
| for _, c := range z.horizontal.contribs[s.i:s.j] { |
| pru, pgu, pbu, pau := src.At(sp.X+int(c.coord), sp.Y+int(y)).RGBA() |
| pr += float64(pru) * c.weight |
| pg += float64(pgu) * c.weight |
| pb += float64(pbu) * c.weight |
| pa += float64(pau) * c.weight |
| } |
| tmp[t] = [4]float64{ |
| pr * s.invTotalWeightFFFF, |
| pg * s.invTotalWeightFFFF, |
| pb * s.invTotalWeightFFFF, |
| pa * s.invTotalWeightFFFF, |
| } |
| t++ |
| } |
| } |
| } |
| |
| func (z *kernelScaler) scaleX_NRGBA(tmp [][4]float64, src *image.NRGBA, sp image.Point) { |
| t := 0 |
| for y := int32(0); y < z.sh; y++ { |
| for _, s := range z.horizontal.sources { |
| var pr, pg, pb, pa float64 |
| for _, c := range z.horizontal.contribs[s.i:s.j] { |
| pru, pgu, pbu, pau := src.At(sp.X+int(c.coord), sp.Y+int(y)).RGBA() |
| pr += float64(pru) * c.weight |
| pg += float64(pgu) * c.weight |
| pb += float64(pbu) * c.weight |
| pa += float64(pau) * c.weight |
| } |
| tmp[t] = [4]float64{ |
| pr * s.invTotalWeightFFFF, |
| pg * s.invTotalWeightFFFF, |
| pb * s.invTotalWeightFFFF, |
| pa * s.invTotalWeightFFFF, |
| } |
| t++ |
| } |
| } |
| } |
| |
| func (z *kernelScaler) scaleX_RGBA(tmp [][4]float64, src *image.RGBA, sp image.Point) { |
| t := 0 |
| for y := int32(0); y < z.sh; y++ { |
| for _, s := range z.horizontal.sources { |
| var pr, pg, pb, pa float64 |
| for _, c := range z.horizontal.contribs[s.i:s.j] { |
| pi := src.PixOffset(sp.X+int(c.coord), sp.Y+int(y)) |
| pru := uint32(src.Pix[pi+0]) * 0x101 |
| pgu := uint32(src.Pix[pi+1]) * 0x101 |
| pbu := uint32(src.Pix[pi+2]) * 0x101 |
| pau := uint32(src.Pix[pi+3]) * 0x101 |
| pr += float64(pru) * c.weight |
| pg += float64(pgu) * c.weight |
| pb += float64(pbu) * c.weight |
| pa += float64(pau) * c.weight |
| } |
| tmp[t] = [4]float64{ |
| pr * s.invTotalWeightFFFF, |
| pg * s.invTotalWeightFFFF, |
| pb * s.invTotalWeightFFFF, |
| pa * s.invTotalWeightFFFF, |
| } |
| t++ |
| } |
| } |
| } |
| |
| func (z *kernelScaler) scaleX_Uniform(tmp [][4]float64, src *image.Uniform, sp image.Point) { |
| t := 0 |
| for y := int32(0); y < z.sh; y++ { |
| for _, s := range z.horizontal.sources { |
| var pr, pg, pb, pa float64 |
| for _, c := range z.horizontal.contribs[s.i:s.j] { |
| pru, pgu, pbu, pau := src.At(sp.X+int(c.coord), sp.Y+int(y)).RGBA() |
| pr += float64(pru) * c.weight |
| pg += float64(pgu) * c.weight |
| pb += float64(pbu) * c.weight |
| pa += float64(pau) * c.weight |
| } |
| tmp[t] = [4]float64{ |
| pr * s.invTotalWeightFFFF, |
| pg * s.invTotalWeightFFFF, |
| pb * s.invTotalWeightFFFF, |
| pa * s.invTotalWeightFFFF, |
| } |
| t++ |
| } |
| } |
| } |
| |
| func (z *kernelScaler) scaleX_YCbCr(tmp [][4]float64, src *image.YCbCr, sp image.Point) { |
| t := 0 |
| for y := int32(0); y < z.sh; y++ { |
| for _, s := range z.horizontal.sources { |
| var pr, pg, pb, pa float64 |
| for _, c := range z.horizontal.contribs[s.i:s.j] { |
| pru, pgu, pbu, pau := src.At(sp.X+int(c.coord), sp.Y+int(y)).RGBA() |
| pr += float64(pru) * c.weight |
| pg += float64(pgu) * c.weight |
| pb += float64(pbu) * c.weight |
| pa += float64(pau) * c.weight |
| } |
| tmp[t] = [4]float64{ |
| pr * s.invTotalWeightFFFF, |
| pg * s.invTotalWeightFFFF, |
| pb * s.invTotalWeightFFFF, |
| pa * s.invTotalWeightFFFF, |
| } |
| t++ |
| } |
| } |
| } |
| |
| func (z *kernelScaler) scaleX_Image(tmp [][4]float64, src image.Image, sp image.Point) { |
| t := 0 |
| for y := int32(0); y < z.sh; y++ { |
| for _, s := range z.horizontal.sources { |
| var pr, pg, pb, pa float64 |
| for _, c := range z.horizontal.contribs[s.i:s.j] { |
| pru, pgu, pbu, pau := src.At(sp.X+int(c.coord), sp.Y+int(y)).RGBA() |
| pr += float64(pru) * c.weight |
| pg += float64(pgu) * c.weight |
| pb += float64(pbu) * c.weight |
| pa += float64(pau) * c.weight |
| } |
| tmp[t] = [4]float64{ |
| pr * s.invTotalWeightFFFF, |
| pg * s.invTotalWeightFFFF, |
| pb * s.invTotalWeightFFFF, |
| pa * s.invTotalWeightFFFF, |
| } |
| t++ |
| } |
| } |
| } |
| |
| func (z *kernelScaler) scaleY_RGBA(dst *image.RGBA, dp image.Point, dr image.Rectangle, tmp [][4]float64) { |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| d := dst.PixOffset(dp.X+int(dx), dp.Y+dr.Min.Y) |
| for _, s := range z.vertical.sources[dr.Min.Y:dr.Max.Y] { |
| var pr, pg, pb, pa float64 |
| for _, c := range z.vertical.contribs[s.i:s.j] { |
| p := &tmp[c.coord*z.dw+dx] |
| pr += p[0] * c.weight |
| pg += p[1] * c.weight |
| pb += p[2] * c.weight |
| pa += p[3] * c.weight |
| } |
| dst.Pix[d+0] = uint8(ftou(pr*s.invTotalWeight) >> 8) |
| dst.Pix[d+1] = uint8(ftou(pg*s.invTotalWeight) >> 8) |
| dst.Pix[d+2] = uint8(ftou(pb*s.invTotalWeight) >> 8) |
| dst.Pix[d+3] = uint8(ftou(pa*s.invTotalWeight) >> 8) |
| d += dst.Stride |
| } |
| } |
| } |
| |
| func (z *kernelScaler) scaleY_Image(dst Image, dp image.Point, dr image.Rectangle, tmp [][4]float64) { |
| dstColorRGBA64 := &color.RGBA64{} |
| dstColor := color.Color(dstColorRGBA64) |
| for dx := int32(dr.Min.X); dx < int32(dr.Max.X); dx++ { |
| for dy, s := range z.vertical.sources[dr.Min.Y:dr.Max.Y] { |
| var pr, pg, pb, pa float64 |
| for _, c := range z.vertical.contribs[s.i:s.j] { |
| p := &tmp[c.coord*z.dw+dx] |
| pr += p[0] * c.weight |
| pg += p[1] * c.weight |
| pb += p[2] * c.weight |
| pa += p[3] * c.weight |
| } |
| dstColorRGBA64.R = ftou(pr * s.invTotalWeight) |
| dstColorRGBA64.G = ftou(pg * s.invTotalWeight) |
| dstColorRGBA64.B = ftou(pb * s.invTotalWeight) |
| dstColorRGBA64.A = ftou(pa * s.invTotalWeight) |
| dst.Set(dp.X+int(dx), dp.Y+int(dr.Min.Y+dy), dstColor) |
| } |
| } |
| } |
