diff options
Diffstat (limited to 'libgo/go/image/color/ycbcr.go')
| -rw-r--r-- | libgo/go/image/color/ycbcr.go | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/libgo/go/image/color/ycbcr.go b/libgo/go/image/color/ycbcr.go index c79816dd45a..4c2f29ea021 100644 --- a/libgo/go/image/color/ycbcr.go +++ b/libgo/go/image/color/ycbcr.go @@ -4,8 +4,7 @@ package color -// RGBToYCbCr converts an RGB triple to a Y'CbCr triple. All components lie -// within the range [0, 255]. +// RGBToYCbCr converts an RGB triple to a Y'CbCr triple. func RGBToYCbCr(r, g, b uint8) (uint8, uint8, uint8) { // The JFIF specification says: // Y' = 0.2990*R + 0.5870*G + 0.1140*B @@ -36,8 +35,7 @@ func RGBToYCbCr(r, g, b uint8) (uint8, uint8, uint8) { return uint8(yy), uint8(cb), uint8(cr) } -// YCbCrToRGB converts a Y'CbCr triple to an RGB triple. All components lie -// within the range [0, 255]. +// YCbCrToRGB converts a Y'CbCr triple to an RGB triple. func YCbCrToRGB(y, cb, cr uint8) (uint8, uint8, uint8) { // The JFIF specification says: // R = Y' + 1.40200*(Cr-128) @@ -89,11 +87,13 @@ func (c YCbCr) RGBA() (uint32, uint32, uint32, uint32) { } // YCbCrModel is the Model for Y'CbCr colors. -var YCbCrModel Model = ModelFunc(func(c Color) Color { +var YCbCrModel Model = ModelFunc(yCbCrModel) + +func yCbCrModel(c Color) Color { if _, ok := c.(YCbCr); ok { return c } r, g, b, _ := c.RGBA() y, u, v := RGBToYCbCr(uint8(r>>8), uint8(g>>8), uint8(b>>8)) return YCbCr{y, u, v} -}) +} |