| Index: src/pkg/image/color.go |
| =================================================================== |
| --- a/src/pkg/image/color.go |
| +++ b/src/pkg/image/color.go |
| @@ -4,14 +4,14 @@ |
| package image |
| -// All Colors can convert themselves, with a possible loss of precision, |
| -// to 64-bit alpha-premultiplied RGBA. Each channel value ranges within |
| -// [0, 0xFFFF]. |
| +// Color can convert itself to alpha-premultiplied RGBA, with a possible loss |
| +// of precision. Each value ranges within [0, 0xFFFF], but is represented by a |
| +// uint32 so that multiplying by a blend factor up to 0xFFFF will not overflow. |
| type Color interface { |
| RGBA() (r, g, b, a uint32) |
| } |
| -// An RGBAColor represents a traditional 32-bit alpha-premultiplied color, |
| +// RGBAColor represents a traditional 32-bit alpha-premultiplied color, |
| // having 8 bits for each of red, green, blue and alpha. |
| type RGBAColor struct { |
| R, G, B, A uint8 |
| @@ -29,7 +29,7 @@ |
| return |
| } |
| -// An RGBA64Color represents a 64-bit alpha-premultiplied color, |
| +// RGBA64Color represents a 64-bit alpha-premultiplied color, |
| // having 16 bits for each of red, green, blue and alpha. |
| type RGBA64Color struct { |
| R, G, B, A uint16 |
| @@ -39,7 +39,7 @@ |
| return uint32(c.R), uint32(c.G), uint32(c.B), uint32(c.A) |
| } |
| -// An NRGBAColor represents a non-alpha-premultiplied 32-bit color. |
| +// NRGBAColor represents a non-alpha-premultiplied 32-bit color. |
| type NRGBAColor struct { |
| R, G, B, A uint8 |
| } |
| @@ -62,7 +62,7 @@ |
| return |
| } |
| -// An NRGBA64Color represents a non-alpha-premultiplied 64-bit color, |
| +// NRGBA64Color represents a non-alpha-premultiplied 64-bit color, |
| // having 16 bits for each of red, green, blue and alpha. |
| type NRGBA64Color struct { |
| R, G, B, A uint16 |
| @@ -82,7 +82,7 @@ |
| return |
| } |
| -// An AlphaColor represents an 8-bit alpha. |
| +// AlphaColor represents an 8-bit alpha. |
| type AlphaColor struct { |
| A uint8 |
| } |
| @@ -93,7 +93,7 @@ |
| return a, a, a, a |
| } |
| -// An Alpha16Color represents a 16-bit alpha. |
| +// Alpha16Color represents a 16-bit alpha. |
| type Alpha16Color struct { |
| A uint16 |
| } |
| @@ -103,7 +103,7 @@ |
| return a, a, a, a |
| } |
| -// A GrayColor represents an 8-bit grayscale color. |
| +// GrayColor represents an 8-bit grayscale color. |
| type GrayColor struct { |
| Y uint8 |
| } |
| @@ -114,7 +114,7 @@ |
| return y, y, y, 0xffff |
| } |
| -// A Gray16Color represents a 16-bit grayscale color. |
| +// Gray16Color represents a 16-bit grayscale color. |
| type Gray16Color struct { |
| Y uint16 |
| } |
| @@ -124,7 +124,7 @@ |
| return y, y, y, 0xffff |
| } |
| -// A ColorModel can convert foreign Colors, with a possible loss of precision, |
| +// ColorModel can convert foreign Colors, with a possible loss of precision, |
| // to a Color from its own color model. |
| type ColorModel interface { |
| Convert(c Color) Color |
