diff options
Diffstat (limited to 'libgo/go/exp/draw/draw_test.go')
| -rw-r--r-- | libgo/go/exp/draw/draw_test.go | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/libgo/go/exp/draw/draw_test.go b/libgo/go/exp/draw/draw_test.go index 90c9e823d3e..873a2f24a40 100644 --- a/libgo/go/exp/draw/draw_test.go +++ b/libgo/go/exp/draw/draw_test.go @@ -6,6 +6,7 @@ package draw import ( "image" + "image/ycbcr" "testing" ) @@ -43,6 +44,34 @@ func vgradAlpha(alpha int) image.Image { return m } +func vgradGreenNRGBA(alpha int) image.Image { + m := image.NewNRGBA(16, 16) + for y := 0; y < 16; y++ { + for x := 0; x < 16; x++ { + m.Set(x, y, image.RGBAColor{0, uint8(y * 0x11), 0, uint8(alpha)}) + } + } + return m +} + +func vgradCr() image.Image { + m := &ycbcr.YCbCr{ + Y: make([]byte, 16*16), + Cb: make([]byte, 16*16), + Cr: make([]byte, 16*16), + YStride: 16, + CStride: 16, + SubsampleRatio: ycbcr.SubsampleRatio444, + Rect: image.Rect(0, 0, 16, 16), + } + for y := 0; y < 16; y++ { + for x := 0; x < 16; x++ { + m.Cr[y*m.CStride+x] = uint8(y * 0x11) + } + } + return m +} + func hgradRed(alpha int) Image { m := image.NewRGBA(16, 16) for y := 0; y < 16; y++ { @@ -95,6 +124,27 @@ var drawTests = []drawTest{ {"copyAlphaSrc", vgradGreen(90), fillAlpha(192), Src, image.RGBAColor{0, 36, 0, 68}}, {"copyNil", vgradGreen(90), nil, Over, image.RGBAColor{88, 48, 0, 255}}, {"copyNilSrc", vgradGreen(90), nil, Src, image.RGBAColor{0, 48, 0, 90}}, + // Uniform mask (100%, 75%, nil) and variable NRGBA source. + // At (x, y) == (8, 8): + // The destination pixel is {136, 0, 0, 255}. + // The source pixel is {0, 136, 0, 90} in NRGBA-space, which is {0, 48, 0, 90} in RGBA-space. + // The result pixel is different than in the "copy*" test cases because of rounding errors. + {"nrgba", vgradGreenNRGBA(90), fillAlpha(255), Over, image.RGBAColor{88, 46, 0, 255}}, + {"nrgbaSrc", vgradGreenNRGBA(90), fillAlpha(255), Src, image.RGBAColor{0, 46, 0, 90}}, + {"nrgbaAlpha", vgradGreenNRGBA(90), fillAlpha(192), Over, image.RGBAColor{100, 34, 0, 255}}, + {"nrgbaAlphaSrc", vgradGreenNRGBA(90), fillAlpha(192), Src, image.RGBAColor{0, 34, 0, 68}}, + {"nrgbaNil", vgradGreenNRGBA(90), nil, Over, image.RGBAColor{88, 46, 0, 255}}, + {"nrgbaNilSrc", vgradGreenNRGBA(90), nil, Src, image.RGBAColor{0, 46, 0, 90}}, + // Uniform mask (100%, 75%, nil) and variable YCbCr source. + // At (x, y) == (8, 8): + // The destination pixel is {136, 0, 0, 255}. + // The source pixel is {0, 0, 136} in YCbCr-space, which is {11, 38, 0, 255} in RGB-space. + {"ycbcr", vgradCr(), fillAlpha(255), Over, image.RGBAColor{11, 38, 0, 255}}, + {"ycbcrSrc", vgradCr(), fillAlpha(255), Src, image.RGBAColor{11, 38, 0, 255}}, + {"ycbcrAlpha", vgradCr(), fillAlpha(192), Over, image.RGBAColor{42, 28, 0, 255}}, + {"ycbcrAlphaSrc", vgradCr(), fillAlpha(192), Src, image.RGBAColor{8, 28, 0, 192}}, + {"ycbcrNil", vgradCr(), nil, Over, image.RGBAColor{11, 38, 0, 255}}, + {"ycbcrNilSrc", vgradCr(), nil, Src, image.RGBAColor{11, 38, 0, 255}}, // Variable mask and variable source. // At (x, y) == (8, 8): // The destination pixel is {136, 0, 0, 255}. |