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image/color/palette: move Plan9Palette and WebSafePalette out of the

Browse Source 
image/color package into their own package. They require some non-
trivial init-time code (interface conversions, currently 40KiB of text)
that would otherwise burden any Go program that imported image/color.

R=r
CC=golang-dev
https://golang.org/cl/13256046
This commit is contained in:
Nigel Tao 2013-08-30 16:03:16 +10:00
parent 5d6ea6f70e
commit aeb8b45866
5 changed files with 526 additions and 519 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

497
src/pkg/image/color/palette.go
View File

@ -1,497 +0,0 @@
// generated by go run gen.go; DO NOT EDIT
package color
// Plan9Palette is a 256-color palette that partitions the 24-bit RGB space
// into 4×4×4 subdivision, with 4 shades in each subcube. Compared to the
// WebSafePalette, the idea is to reduce the color resolution by dicing the
// color cube into fewer cells, and to use the extra space to increase the
// intensity resolution. This results in 16 gray shades (4 gray subcubes with
// 4 samples in each), 13 shades of each primary and secondary color (3
// subcubes with 4 samples plus black) and a reasonable selection of colors
// covering the rest of the color cube. The advantage is better representation
// of continuous tones.
//
// This palette was used in the Plan 9 Operating System, described at
// http://plan9.bell-labs.com/magic/man2html/6/color
var Plan9Palette = []Color{
RGBA{0x00, 0x00, 0x00, 0xff},
RGBA{0x00, 0x00, 0x44, 0xff},
RGBA{0x00, 0x00, 0x88, 0xff},
RGBA{0x00, 0x00, 0xcc, 0xff},
RGBA{0x00, 0x44, 0x00, 0xff},
RGBA{0x00, 0x44, 0x44, 0xff},
RGBA{0x00, 0x44, 0x88, 0xff},
RGBA{0x00, 0x44, 0xcc, 0xff},
RGBA{0x00, 0x88, 0x00, 0xff},
RGBA{0x00, 0x88, 0x44, 0xff},
RGBA{0x00, 0x88, 0x88, 0xff},
RGBA{0x00, 0x88, 0xcc, 0xff},
RGBA{0x00, 0xcc, 0x00, 0xff},
RGBA{0x00, 0xcc, 0x44, 0xff},
RGBA{0x00, 0xcc, 0x88, 0xff},
RGBA{0x00, 0xcc, 0xcc, 0xff},
RGBA{0x00, 0xdd, 0xdd, 0xff},
RGBA{0x11, 0x11, 0x11, 0xff},
RGBA{0x00, 0x00, 0x55, 0xff},
RGBA{0x00, 0x00, 0x99, 0xff},
RGBA{0x00, 0x00, 0xdd, 0xff},
RGBA{0x00, 0x55, 0x00, 0xff},
RGBA{0x00, 0x55, 0x55, 0xff},
RGBA{0x00, 0x4c, 0x99, 0xff},
RGBA{0x00, 0x49, 0xdd, 0xff},
RGBA{0x00, 0x99, 0x00, 0xff},
RGBA{0x00, 0x99, 0x4c, 0xff},
RGBA{0x00, 0x99, 0x99, 0xff},
RGBA{0x00, 0x93, 0xdd, 0xff},
RGBA{0x00, 0xdd, 0x00, 0xff},
RGBA{0x00, 0xdd, 0x49, 0xff},
RGBA{0x00, 0xdd, 0x93, 0xff},
RGBA{0x00, 0xee, 0x9e, 0xff},
RGBA{0x00, 0xee, 0xee, 0xff},
RGBA{0x22, 0x22, 0x22, 0xff},
RGBA{0x00, 0x00, 0x66, 0xff},
RGBA{0x00, 0x00, 0xaa, 0xff},
RGBA{0x00, 0x00, 0xee, 0xff},
RGBA{0x00, 0x66, 0x00, 0xff},
RGBA{0x00, 0x66, 0x66, 0xff},
RGBA{0x00, 0x55, 0xaa, 0xff},
RGBA{0x00, 0x4f, 0xee, 0xff},
RGBA{0x00, 0xaa, 0x00, 0xff},
RGBA{0x00, 0xaa, 0x55, 0xff},
RGBA{0x00, 0xaa, 0xaa, 0xff},
RGBA{0x00, 0x9e, 0xee, 0xff},
RGBA{0x00, 0xee, 0x00, 0xff},
RGBA{0x00, 0xee, 0x4f, 0xff},
RGBA{0x00, 0xff, 0x55, 0xff},
RGBA{0x00, 0xff, 0xaa, 0xff},
RGBA{0x00, 0xff, 0xff, 0xff},
RGBA{0x33, 0x33, 0x33, 0xff},
RGBA{0x00, 0x00, 0x77, 0xff},
RGBA{0x00, 0x00, 0xbb, 0xff},
RGBA{0x00, 0x00, 0xff, 0xff},
RGBA{0x00, 0x77, 0x00, 0xff},
RGBA{0x00, 0x77, 0x77, 0xff},
RGBA{0x00, 0x5d, 0xbb, 0xff},
RGBA{0x00, 0x55, 0xff, 0xff},
RGBA{0x00, 0xbb, 0x00, 0xff},
RGBA{0x00, 0xbb, 0x5d, 0xff},
RGBA{0x00, 0xbb, 0xbb, 0xff},
RGBA{0x00, 0xaa, 0xff, 0xff},
RGBA{0x00, 0xff, 0x00, 0xff},
RGBA{0x44, 0x00, 0x44, 0xff},
RGBA{0x44, 0x00, 0x88, 0xff},
RGBA{0x44, 0x00, 0xcc, 0xff},
RGBA{0x44, 0x44, 0x00, 0xff},
RGBA{0x44, 0x44, 0x44, 0xff},
RGBA{0x44, 0x44, 0x88, 0xff},
RGBA{0x44, 0x44, 0xcc, 0xff},
RGBA{0x44, 0x88, 0x00, 0xff},
RGBA{0x44, 0x88, 0x44, 0xff},
RGBA{0x44, 0x88, 0x88, 0xff},
RGBA{0x44, 0x88, 0xcc, 0xff},
RGBA{0x44, 0xcc, 0x00, 0xff},
RGBA{0x44, 0xcc, 0x44, 0xff},
RGBA{0x44, 0xcc, 0x88, 0xff},
RGBA{0x44, 0xcc, 0xcc, 0xff},
RGBA{0x44, 0x00, 0x00, 0xff},
RGBA{0x55, 0x00, 0x00, 0xff},
RGBA{0x55, 0x00, 0x55, 0xff},
RGBA{0x4c, 0x00, 0x99, 0xff},
RGBA{0x49, 0x00, 0xdd, 0xff},
RGBA{0x55, 0x55, 0x00, 0xff},
RGBA{0x55, 0x55, 0x55, 0xff},
RGBA{0x4c, 0x4c, 0x99, 0xff},
RGBA{0x49, 0x49, 0xdd, 0xff},
RGBA{0x4c, 0x99, 0x00, 0xff},
RGBA{0x4c, 0x99, 0x4c, 0xff},
RGBA{0x4c, 0x99, 0x99, 0xff},
RGBA{0x49, 0x93, 0xdd, 0xff},
RGBA{0x49, 0xdd, 0x00, 0xff},
RGBA{0x49, 0xdd, 0x49, 0xff},
RGBA{0x49, 0xdd, 0x93, 0xff},
RGBA{0x49, 0xdd, 0xdd, 0xff},
RGBA{0x4f, 0xee, 0xee, 0xff},
RGBA{0x66, 0x00, 0x00, 0xff},
RGBA{0x66, 0x00, 0x66, 0xff},
RGBA{0x55, 0x00, 0xaa, 0xff},
RGBA{0x4f, 0x00, 0xee, 0xff},
RGBA{0x66, 0x66, 0x00, 0xff},
RGBA{0x66, 0x66, 0x66, 0xff},
RGBA{0x55, 0x55, 0xaa, 0xff},
RGBA{0x4f, 0x4f, 0xee, 0xff},
RGBA{0x55, 0xaa, 0x00, 0xff},
RGBA{0x55, 0xaa, 0x55, 0xff},
RGBA{0x55, 0xaa, 0xaa, 0xff},
RGBA{0x4f, 0x9e, 0xee, 0xff},
RGBA{0x4f, 0xee, 0x00, 0xff},
RGBA{0x4f, 0xee, 0x4f, 0xff},
RGBA{0x4f, 0xee, 0x9e, 0xff},
RGBA{0x55, 0xff, 0xaa, 0xff},
RGBA{0x55, 0xff, 0xff, 0xff},
RGBA{0x77, 0x00, 0x00, 0xff},
RGBA{0x77, 0x00, 0x77, 0xff},
RGBA{0x5d, 0x00, 0xbb, 0xff},
RGBA{0x55, 0x00, 0xff, 0xff},
RGBA{0x77, 0x77, 0x00, 0xff},
RGBA{0x77, 0x77, 0x77, 0xff},
RGBA{0x5d, 0x5d, 0xbb, 0xff},
RGBA{0x55, 0x55, 0xff, 0xff},
RGBA{0x5d, 0xbb, 0x00, 0xff},
RGBA{0x5d, 0xbb, 0x5d, 0xff},
RGBA{0x5d, 0xbb, 0xbb, 0xff},
RGBA{0x55, 0xaa, 0xff, 0xff},
RGBA{0x55, 0xff, 0x00, 0xff},
RGBA{0x55, 0xff, 0x55, 0xff},
RGBA{0x88, 0x00, 0x88, 0xff},
RGBA{0x88, 0x00, 0xcc, 0xff},
RGBA{0x88, 0x44, 0x00, 0xff},
RGBA{0x88, 0x44, 0x44, 0xff},
RGBA{0x88, 0x44, 0x88, 0xff},
RGBA{0x88, 0x44, 0xcc, 0xff},
RGBA{0x88, 0x88, 0x00, 0xff},
RGBA{0x88, 0x88, 0x44, 0xff},
RGBA{0x88, 0x88, 0x88, 0xff},
RGBA{0x88, 0x88, 0xcc, 0xff},
RGBA{0x88, 0xcc, 0x00, 0xff},
RGBA{0x88, 0xcc, 0x44, 0xff},
RGBA{0x88, 0xcc, 0x88, 0xff},
RGBA{0x88, 0xcc, 0xcc, 0xff},
RGBA{0x88, 0x00, 0x00, 0xff},
RGBA{0x88, 0x00, 0x44, 0xff},
RGBA{0x99, 0x00, 0x4c, 0xff},
RGBA{0x99, 0x00, 0x99, 0xff},
RGBA{0x93, 0x00, 0xdd, 0xff},
RGBA{0x99, 0x4c, 0x00, 0xff},
RGBA{0x99, 0x4c, 0x4c, 0xff},
RGBA{0x99, 0x4c, 0x99, 0xff},
RGBA{0x93, 0x49, 0xdd, 0xff},
RGBA{0x99, 0x99, 0x00, 0xff},
RGBA{0x99, 0x99, 0x4c, 0xff},
RGBA{0x99, 0x99, 0x99, 0xff},
RGBA{0x93, 0x93, 0xdd, 0xff},
RGBA{0x93, 0xdd, 0x00, 0xff},
RGBA{0x93, 0xdd, 0x49, 0xff},
RGBA{0x93, 0xdd, 0x93, 0xff},
RGBA{0x93, 0xdd, 0xdd, 0xff},
RGBA{0x99, 0x00, 0x00, 0xff},
RGBA{0xaa, 0x00, 0x00, 0xff},
RGBA{0xaa, 0x00, 0x55, 0xff},
RGBA{0xaa, 0x00, 0xaa, 0xff},
RGBA{0x9e, 0x00, 0xee, 0xff},
RGBA{0xaa, 0x55, 0x00, 0xff},
RGBA{0xaa, 0x55, 0x55, 0xff},
RGBA{0xaa, 0x55, 0xaa, 0xff},
RGBA{0x9e, 0x4f, 0xee, 0xff},
RGBA{0xaa, 0xaa, 0x00, 0xff},
RGBA{0xaa, 0xaa, 0x55, 0xff},
RGBA{0xaa, 0xaa, 0xaa, 0xff},
RGBA{0x9e, 0x9e, 0xee, 0xff},
RGBA{0x9e, 0xee, 0x00, 0xff},
RGBA{0x9e, 0xee, 0x4f, 0xff},
RGBA{0x9e, 0xee, 0x9e, 0xff},
RGBA{0x9e, 0xee, 0xee, 0xff},
RGBA{0xaa, 0xff, 0xff, 0xff},
RGBA{0xbb, 0x00, 0x00, 0xff},
RGBA{0xbb, 0x00, 0x5d, 0xff},
RGBA{0xbb, 0x00, 0xbb, 0xff},
RGBA{0xaa, 0x00, 0xff, 0xff},
RGBA{0xbb, 0x5d, 0x00, 0xff},
RGBA{0xbb, 0x5d, 0x5d, 0xff},
RGBA{0xbb, 0x5d, 0xbb, 0xff},
RGBA{0xaa, 0x55, 0xff, 0xff},
RGBA{0xbb, 0xbb, 0x00, 0xff},
RGBA{0xbb, 0xbb, 0x5d, 0xff},
RGBA{0xbb, 0xbb, 0xbb, 0xff},
RGBA{0xaa, 0xaa, 0xff, 0xff},
RGBA{0xaa, 0xff, 0x00, 0xff},
RGBA{0xaa, 0xff, 0x55, 0xff},
RGBA{0xaa, 0xff, 0xaa, 0xff},
RGBA{0xcc, 0x00, 0xcc, 0xff},
RGBA{0xcc, 0x44, 0x00, 0xff},
RGBA{0xcc, 0x44, 0x44, 0xff},
RGBA{0xcc, 0x44, 0x88, 0xff},
RGBA{0xcc, 0x44, 0xcc, 0xff},
RGBA{0xcc, 0x88, 0x00, 0xff},
RGBA{0xcc, 0x88, 0x44, 0xff},
RGBA{0xcc, 0x88, 0x88, 0xff},
RGBA{0xcc, 0x88, 0xcc, 0xff},
RGBA{0xcc, 0xcc, 0x00, 0xff},
RGBA{0xcc, 0xcc, 0x44, 0xff},
RGBA{0xcc, 0xcc, 0x88, 0xff},
RGBA{0xcc, 0xcc, 0xcc, 0xff},
RGBA{0xcc, 0x00, 0x00, 0xff},
RGBA{0xcc, 0x00, 0x44, 0xff},
RGBA{0xcc, 0x00, 0x88, 0xff},
RGBA{0xdd, 0x00, 0x93, 0xff},
RGBA{0xdd, 0x00, 0xdd, 0xff},
RGBA{0xdd, 0x49, 0x00, 0xff},
RGBA{0xdd, 0x49, 0x49, 0xff},
RGBA{0xdd, 0x49, 0x93, 0xff},
RGBA{0xdd, 0x49, 0xdd, 0xff},
RGBA{0xdd, 0x93, 0x00, 0xff},
RGBA{0xdd, 0x93, 0x49, 0xff},
RGBA{0xdd, 0x93, 0x93, 0xff},
RGBA{0xdd, 0x93, 0xdd, 0xff},
RGBA{0xdd, 0xdd, 0x00, 0xff},
RGBA{0xdd, 0xdd, 0x49, 0xff},
RGBA{0xdd, 0xdd, 0x93, 0xff},
RGBA{0xdd, 0xdd, 0xdd, 0xff},
RGBA{0xdd, 0x00, 0x00, 0xff},
RGBA{0xdd, 0x00, 0x49, 0xff},
RGBA{0xee, 0x00, 0x4f, 0xff},
RGBA{0xee, 0x00, 0x9e, 0xff},
RGBA{0xee, 0x00, 0xee, 0xff},
RGBA{0xee, 0x4f, 0x00, 0xff},
RGBA{0xee, 0x4f, 0x4f, 0xff},
RGBA{0xee, 0x4f, 0x9e, 0xff},
RGBA{0xee, 0x4f, 0xee, 0xff},
RGBA{0xee, 0x9e, 0x00, 0xff},
RGBA{0xee, 0x9e, 0x4f, 0xff},
RGBA{0xee, 0x9e, 0x9e, 0xff},
RGBA{0xee, 0x9e, 0xee, 0xff},
RGBA{0xee, 0xee, 0x00, 0xff},
RGBA{0xee, 0xee, 0x4f, 0xff},
RGBA{0xee, 0xee, 0x9e, 0xff},
RGBA{0xee, 0xee, 0xee, 0xff},
RGBA{0xee, 0x00, 0x00, 0xff},
RGBA{0xff, 0x00, 0x00, 0xff},
RGBA{0xff, 0x00, 0x55, 0xff},
RGBA{0xff, 0x00, 0xaa, 0xff},
RGBA{0xff, 0x00, 0xff, 0xff},
RGBA{0xff, 0x55, 0x00, 0xff},
RGBA{0xff, 0x55, 0x55, 0xff},
RGBA{0xff, 0x55, 0xaa, 0xff},
RGBA{0xff, 0x55, 0xff, 0xff},
RGBA{0xff, 0xaa, 0x00, 0xff},
RGBA{0xff, 0xaa, 0x55, 0xff},
RGBA{0xff, 0xaa, 0xaa, 0xff},
RGBA{0xff, 0xaa, 0xff, 0xff},
RGBA{0xff, 0xff, 0x00, 0xff},
RGBA{0xff, 0xff, 0x55, 0xff},
RGBA{0xff, 0xff, 0xaa, 0xff},
RGBA{0xff, 0xff, 0xff, 0xff},
}
// WebSafePalette is a 216-color palette that was popularized by early versions
// of Netscape Navigator. It is also known as the Netscape Color Cube.
//
// See http://en.wikipedia.org/wiki/Web_colors#Web-safe_colors for details.
var WebSafePalette = []Color{
RGBA{0x00, 0x00, 0x00, 0xff},
RGBA{0x00, 0x00, 0x33, 0xff},
RGBA{0x00, 0x00, 0x66, 0xff},
RGBA{0x00, 0x00, 0x99, 0xff},
RGBA{0x00, 0x00, 0xcc, 0xff},
RGBA{0x00, 0x00, 0xff, 0xff},
RGBA{0x00, 0x33, 0x00, 0xff},
RGBA{0x00, 0x33, 0x33, 0xff},
RGBA{0x00, 0x33, 0x66, 0xff},
RGBA{0x00, 0x33, 0x99, 0xff},
RGBA{0x00, 0x33, 0xcc, 0xff},
RGBA{0x00, 0x33, 0xff, 0xff},
RGBA{0x00, 0x66, 0x00, 0xff},
RGBA{0x00, 0x66, 0x33, 0xff},
RGBA{0x00, 0x66, 0x66, 0xff},
RGBA{0x00, 0x66, 0x99, 0xff},
RGBA{0x00, 0x66, 0xcc, 0xff},
RGBA{0x00, 0x66, 0xff, 0xff},
RGBA{0x00, 0x99, 0x00, 0xff},
RGBA{0x00, 0x99, 0x33, 0xff},
RGBA{0x00, 0x99, 0x66, 0xff},
RGBA{0x00, 0x99, 0x99, 0xff},
RGBA{0x00, 0x99, 0xcc, 0xff},
RGBA{0x00, 0x99, 0xff, 0xff},
RGBA{0x00, 0xcc, 0x00, 0xff},
RGBA{0x00, 0xcc, 0x33, 0xff},
RGBA{0x00, 0xcc, 0x66, 0xff},
RGBA{0x00, 0xcc, 0x99, 0xff},
RGBA{0x00, 0xcc, 0xcc, 0xff},
RGBA{0x00, 0xcc, 0xff, 0xff},
RGBA{0x00, 0xff, 0x00, 0xff},
RGBA{0x00, 0xff, 0x33, 0xff},
RGBA{0x00, 0xff, 0x66, 0xff},
RGBA{0x00, 0xff, 0x99, 0xff},
RGBA{0x00, 0xff, 0xcc, 0xff},
RGBA{0x00, 0xff, 0xff, 0xff},
RGBA{0x33, 0x00, 0x00, 0xff},
RGBA{0x33, 0x00, 0x33, 0xff},
RGBA{0x33, 0x00, 0x66, 0xff},
RGBA{0x33, 0x00, 0x99, 0xff},
RGBA{0x33, 0x00, 0xcc, 0xff},
RGBA{0x33, 0x00, 0xff, 0xff},
RGBA{0x33, 0x33, 0x00, 0xff},
RGBA{0x33, 0x33, 0x33, 0xff},
RGBA{0x33, 0x33, 0x66, 0xff},
RGBA{0x33, 0x33, 0x99, 0xff},
RGBA{0x33, 0x33, 0xcc, 0xff},
RGBA{0x33, 0x33, 0xff, 0xff},
RGBA{0x33, 0x66, 0x00, 0xff},
RGBA{0x33, 0x66, 0x33, 0xff},
RGBA{0x33, 0x66, 0x66, 0xff},
RGBA{0x33, 0x66, 0x99, 0xff},
RGBA{0x33, 0x66, 0xcc, 0xff},
RGBA{0x33, 0x66, 0xff, 0xff},
RGBA{0x33, 0x99, 0x00, 0xff},
RGBA{0x33, 0x99, 0x33, 0xff},
RGBA{0x33, 0x99, 0x66, 0xff},
RGBA{0x33, 0x99, 0x99, 0xff},
RGBA{0x33, 0x99, 0xcc, 0xff},
RGBA{0x33, 0x99, 0xff, 0xff},
RGBA{0x33, 0xcc, 0x00, 0xff},
RGBA{0x33, 0xcc, 0x33, 0xff},
RGBA{0x33, 0xcc, 0x66, 0xff},
RGBA{0x33, 0xcc, 0x99, 0xff},
RGBA{0x33, 0xcc, 0xcc, 0xff},
RGBA{0x33, 0xcc, 0xff, 0xff},
RGBA{0x33, 0xff, 0x00, 0xff},
RGBA{0x33, 0xff, 0x33, 0xff},
RGBA{0x33, 0xff, 0x66, 0xff},
RGBA{0x33, 0xff, 0x99, 0xff},
RGBA{0x33, 0xff, 0xcc, 0xff},
RGBA{0x33, 0xff, 0xff, 0xff},
RGBA{0x66, 0x00, 0x00, 0xff},
RGBA{0x66, 0x00, 0x33, 0xff},
RGBA{0x66, 0x00, 0x66, 0xff},
RGBA{0x66, 0x00, 0x99, 0xff},
RGBA{0x66, 0x00, 0xcc, 0xff},
RGBA{0x66, 0x00, 0xff, 0xff},
RGBA{0x66, 0x33, 0x00, 0xff},
RGBA{0x66, 0x33, 0x33, 0xff},
RGBA{0x66, 0x33, 0x66, 0xff},
RGBA{0x66, 0x33, 0x99, 0xff},
RGBA{0x66, 0x33, 0xcc, 0xff},
RGBA{0x66, 0x33, 0xff, 0xff},
RGBA{0x66, 0x66, 0x00, 0xff},
RGBA{0x66, 0x66, 0x33, 0xff},
RGBA{0x66, 0x66, 0x66, 0xff},
RGBA{0x66, 0x66, 0x99, 0xff},
RGBA{0x66, 0x66, 0xcc, 0xff},
RGBA{0x66, 0x66, 0xff, 0xff},
RGBA{0x66, 0x99, 0x00, 0xff},
RGBA{0x66, 0x99, 0x33, 0xff},
RGBA{0x66, 0x99, 0x66, 0xff},
RGBA{0x66, 0x99, 0x99, 0xff},
RGBA{0x66, 0x99, 0xcc, 0xff},
RGBA{0x66, 0x99, 0xff, 0xff},
RGBA{0x66, 0xcc, 0x00, 0xff},
RGBA{0x66, 0xcc, 0x33, 0xff},
RGBA{0x66, 0xcc, 0x66, 0xff},
RGBA{0x66, 0xcc, 0x99, 0xff},
RGBA{0x66, 0xcc, 0xcc, 0xff},
RGBA{0x66, 0xcc, 0xff, 0xff},
RGBA{0x66, 0xff, 0x00, 0xff},
RGBA{0x66, 0xff, 0x33, 0xff},
RGBA{0x66, 0xff, 0x66, 0xff},
RGBA{0x66, 0xff, 0x99, 0xff},
RGBA{0x66, 0xff, 0xcc, 0xff},
RGBA{0x66, 0xff, 0xff, 0xff},
RGBA{0x99, 0x00, 0x00, 0xff},
RGBA{0x99, 0x00, 0x33, 0xff},
RGBA{0x99, 0x00, 0x66, 0xff},
RGBA{0x99, 0x00, 0x99, 0xff},
RGBA{0x99, 0x00, 0xcc, 0xff},
RGBA{0x99, 0x00, 0xff, 0xff},
RGBA{0x99, 0x33, 0x00, 0xff},
RGBA{0x99, 0x33, 0x33, 0xff},
RGBA{0x99, 0x33, 0x66, 0xff},
RGBA{0x99, 0x33, 0x99, 0xff},
RGBA{0x99, 0x33, 0xcc, 0xff},
RGBA{0x99, 0x33, 0xff, 0xff},
RGBA{0x99, 0x66, 0x00, 0xff},
RGBA{0x99, 0x66, 0x33, 0xff},
RGBA{0x99, 0x66, 0x66, 0xff},
RGBA{0x99, 0x66, 0x99, 0xff},
RGBA{0x99, 0x66, 0xcc, 0xff},
RGBA{0x99, 0x66, 0xff, 0xff},
RGBA{0x99, 0x99, 0x00, 0xff},
RGBA{0x99, 0x99, 0x33, 0xff},
RGBA{0x99, 0x99, 0x66, 0xff},
RGBA{0x99, 0x99, 0x99, 0xff},
RGBA{0x99, 0x99, 0xcc, 0xff},
RGBA{0x99, 0x99, 0xff, 0xff},
RGBA{0x99, 0xcc, 0x00, 0xff},
RGBA{0x99, 0xcc, 0x33, 0xff},
RGBA{0x99, 0xcc, 0x66, 0xff},
RGBA{0x99, 0xcc, 0x99, 0xff},
RGBA{0x99, 0xcc, 0xcc, 0xff},
RGBA{0x99, 0xcc, 0xff, 0xff},
RGBA{0x99, 0xff, 0x00, 0xff},
RGBA{0x99, 0xff, 0x33, 0xff},
RGBA{0x99, 0xff, 0x66, 0xff},
RGBA{0x99, 0xff, 0x99, 0xff},
RGBA{0x99, 0xff, 0xcc, 0xff},
RGBA{0x99, 0xff, 0xff, 0xff},
RGBA{0xcc, 0x00, 0x00, 0xff},
RGBA{0xcc, 0x00, 0x33, 0xff},
RGBA{0xcc, 0x00, 0x66, 0xff},
RGBA{0xcc, 0x00, 0x99, 0xff},
RGBA{0xcc, 0x00, 0xcc, 0xff},
RGBA{0xcc, 0x00, 0xff, 0xff},
RGBA{0xcc, 0x33, 0x00, 0xff},
RGBA{0xcc, 0x33, 0x33, 0xff},
RGBA{0xcc, 0x33, 0x66, 0xff},
RGBA{0xcc, 0x33, 0x99, 0xff},
RGBA{0xcc, 0x33, 0xcc, 0xff},
RGBA{0xcc, 0x33, 0xff, 0xff},
RGBA{0xcc, 0x66, 0x00, 0xff},
RGBA{0xcc, 0x66, 0x33, 0xff},
RGBA{0xcc, 0x66, 0x66, 0xff},
RGBA{0xcc, 0x66, 0x99, 0xff},
RGBA{0xcc, 0x66, 0xcc, 0xff},
RGBA{0xcc, 0x66, 0xff, 0xff},
RGBA{0xcc, 0x99, 0x00, 0xff},
RGBA{0xcc, 0x99, 0x33, 0xff},
RGBA{0xcc, 0x99, 0x66, 0xff},
RGBA{0xcc, 0x99, 0x99, 0xff},
RGBA{0xcc, 0x99, 0xcc, 0xff},
RGBA{0xcc, 0x99, 0xff, 0xff},
RGBA{0xcc, 0xcc, 0x00, 0xff},
RGBA{0xcc, 0xcc, 0x33, 0xff},
RGBA{0xcc, 0xcc, 0x66, 0xff},
RGBA{0xcc, 0xcc, 0x99, 0xff},
RGBA{0xcc, 0xcc, 0xcc, 0xff},
RGBA{0xcc, 0xcc, 0xff, 0xff},
RGBA{0xcc, 0xff, 0x00, 0xff},
RGBA{0xcc, 0xff, 0x33, 0xff},
RGBA{0xcc, 0xff, 0x66, 0xff},
RGBA{0xcc, 0xff, 0x99, 0xff},
RGBA{0xcc, 0xff, 0xcc, 0xff},
RGBA{0xcc, 0xff, 0xff, 0xff},
RGBA{0xff, 0x00, 0x00, 0xff},
RGBA{0xff, 0x00, 0x33, 0xff},
RGBA{0xff, 0x00, 0x66, 0xff},
RGBA{0xff, 0x00, 0x99, 0xff},
RGBA{0xff, 0x00, 0xcc, 0xff},
RGBA{0xff, 0x00, 0xff, 0xff},
RGBA{0xff, 0x33, 0x00, 0xff},
RGBA{0xff, 0x33, 0x33, 0xff},
RGBA{0xff, 0x33, 0x66, 0xff},
RGBA{0xff, 0x33, 0x99, 0xff},
RGBA{0xff, 0x33, 0xcc, 0xff},
RGBA{0xff, 0x33, 0xff, 0xff},
RGBA{0xff, 0x66, 0x00, 0xff},
RGBA{0xff, 0x66, 0x33, 0xff},
RGBA{0xff, 0x66, 0x66, 0xff},
RGBA{0xff, 0x66, 0x99, 0xff},
RGBA{0xff, 0x66, 0xcc, 0xff},
RGBA{0xff, 0x66, 0xff, 0xff},
RGBA{0xff, 0x99, 0x00, 0xff},
RGBA{0xff, 0x99, 0x33, 0xff},
RGBA{0xff, 0x99, 0x66, 0xff},
RGBA{0xff, 0x99, 0x99, 0xff},
RGBA{0xff, 0x99, 0xcc, 0xff},
RGBA{0xff, 0x99, 0xff, 0xff},
RGBA{0xff, 0xcc, 0x00, 0xff},
RGBA{0xff, 0xcc, 0x33, 0xff},
RGBA{0xff, 0xcc, 0x66, 0xff},
RGBA{0xff, 0xcc, 0x99, 0xff},
RGBA{0xff, 0xcc, 0xcc, 0xff},
RGBA{0xff, 0xcc, 0xff, 0xff},
RGBA{0xff, 0xff, 0x00, 0xff},
RGBA{0xff, 0xff, 0x33, 0xff},
RGBA{0xff, 0xff, 0x66, 0xff},
RGBA{0xff, 0xff, 0x99, 0xff},
RGBA{0xff, 0xff, 0xcc, 0xff},
RGBA{0xff, 0xff, 0xff, 0xff},
}

19
src/pkg/image/color/gen.go → src/pkg/image/color/palette/gen.go
View File

@ -16,7 +16,10 @@ import (
func main() { func main() {
fmt.Println("// generated by go run gen.go; DO NOT EDIT") fmt.Println("// generated by go run gen.go; DO NOT EDIT")
fmt.Println() fmt.Println()
fmt.Println("package color") fmt.Println("// Package palette provides standard color palettes.")
fmt.Println("package palette")
fmt.Println()
fmt.Println(`import "image/color"`)
fmt.Println() fmt.Println()
printPlan9() printPlan9()
printWebSafe() printWebSafe()
@ -46,14 +49,14 @@ func printPlan9() {
c[2] = b * num / den c[2] = b * num / den
} }
lines[i+(j&0x0f)] = lines[i+(j&0x0f)] =
fmt.Sprintf("\tRGBA{0x%02x, 0x%02x, 0x%02x, 0xff},", c[0], c[1], c[2]) fmt.Sprintf("\tcolor.RGBA{0x%02x, 0x%02x, 0x%02x, 0xff},", c[0], c[1], c[2])
} }
} }
} }
} }
fmt.Println("// Plan9Palette is a 256-color palette that partitions the 24-bit RGB space") fmt.Println("// Plan9 is a 256-color palette that partitions the 24-bit RGB space")
fmt.Println("// into 4×4×4 subdivision, with 4 shades in each subcube. Compared to the") fmt.Println("// into 4×4×4 subdivision, with 4 shades in each subcube. Compared to the")
fmt.Println("// WebSafePalette, the idea is to reduce the color resolution by dicing the") fmt.Println("// WebSafe, the idea is to reduce the color resolution by dicing the")
fmt.Println("// color cube into fewer cells, and to use the extra space to increase the") fmt.Println("// color cube into fewer cells, and to use the extra space to increase the")
fmt.Println("// intensity resolution. This results in 16 gray shades (4 gray subcubes with") fmt.Println("// intensity resolution. This results in 16 gray shades (4 gray subcubes with")
fmt.Println("// 4 samples in each), 13 shades of each primary and secondary color (3") fmt.Println("// 4 samples in each), 13 shades of each primary and secondary color (3")
@ -63,7 +66,7 @@ func printPlan9() {
fmt.Println("//") fmt.Println("//")
fmt.Println("// This palette was used in the Plan 9 Operating System, described at") fmt.Println("// This palette was used in the Plan 9 Operating System, described at")
fmt.Println("// http://plan9.bell-labs.com/magic/man2html/6/color") fmt.Println("// http://plan9.bell-labs.com/magic/man2html/6/color")
fmt.Println("var Plan9Palette = []Color{") fmt.Println("var Plan9 = []color.Color{")
for _, line := range lines { for _, line := range lines {
fmt.Println(line) fmt.Println(line)
} }
@ -77,15 +80,15 @@ func printWebSafe() {
for g := 0; g < 6; g++ { for g := 0; g < 6; g++ {
for b := 0; b < 6; b++ { for b := 0; b < 6; b++ {
lines[36*r+6*g+b] = lines[36*r+6*g+b] =
fmt.Sprintf("\tRGBA{0x%02x, 0x%02x, 0x%02x, 0xff},", 0x33*r, 0x33*g, 0x33*b) fmt.Sprintf("\tcolor.RGBA{0x%02x, 0x%02x, 0x%02x, 0xff},", 0x33*r, 0x33*g, 0x33*b)
} }
} }
} }
fmt.Println("// WebSafePalette is a 216-color palette that was popularized by early versions") fmt.Println("// WebSafe is a 216-color palette that was popularized by early versions")
fmt.Println("// of Netscape Navigator. It is also known as the Netscape Color Cube.") fmt.Println("// of Netscape Navigator. It is also known as the Netscape Color Cube.")
fmt.Println("//") fmt.Println("//")
fmt.Println("// See http://en.wikipedia.org/wiki/Web_colors#Web-safe_colors for details.") fmt.Println("// See http://en.wikipedia.org/wiki/Web_colors#Web-safe_colors for details.")
fmt.Println("var WebSafePalette = []Color{") fmt.Println("var WebSafe = []color.Color{")
for _, line := range lines { for _, line := range lines {
fmt.Println(line) fmt.Println(line)
} }

500
src/pkg/image/color/palette/palette.go Normal file
View File

@ -0,0 +1,500 @@
// generated by go run gen.go; DO NOT EDIT
// Package palette provides standard color palettes.
package palette
import "image/color"
// Plan9 is a 256-color palette that partitions the 24-bit RGB space
// into 4×4×4 subdivision, with 4 shades in each subcube. Compared to the
// WebSafe, the idea is to reduce the color resolution by dicing the
// color cube into fewer cells, and to use the extra space to increase the
// intensity resolution. This results in 16 gray shades (4 gray subcubes with
// 4 samples in each), 13 shades of each primary and secondary color (3
// subcubes with 4 samples plus black) and a reasonable selection of colors
// covering the rest of the color cube. The advantage is better representation
// of continuous tones.
//
// This palette was used in the Plan 9 Operating System, described at
// http://plan9.bell-labs.com/magic/man2html/6/color
var Plan9 = []color.Color{
color.RGBA{0x00, 0x00, 0x00, 0xff},
color.RGBA{0x00, 0x00, 0x44, 0xff},
color.RGBA{0x00, 0x00, 0x88, 0xff},
color.RGBA{0x00, 0x00, 0xcc, 0xff},
color.RGBA{0x00, 0x44, 0x00, 0xff},
color.RGBA{0x00, 0x44, 0x44, 0xff},
color.RGBA{0x00, 0x44, 0x88, 0xff},
color.RGBA{0x00, 0x44, 0xcc, 0xff},
color.RGBA{0x00, 0x88, 0x00, 0xff},
color.RGBA{0x00, 0x88, 0x44, 0xff},
color.RGBA{0x00, 0x88, 0x88, 0xff},
color.RGBA{0x00, 0x88, 0xcc, 0xff},
color.RGBA{0x00, 0xcc, 0x00, 0xff},
color.RGBA{0x00, 0xcc, 0x44, 0xff},
color.RGBA{0x00, 0xcc, 0x88, 0xff},
color.RGBA{0x00, 0xcc, 0xcc, 0xff},
color.RGBA{0x00, 0xdd, 0xdd, 0xff},
color.RGBA{0x11, 0x11, 0x11, 0xff},
color.RGBA{0x00, 0x00, 0x55, 0xff},
color.RGBA{0x00, 0x00, 0x99, 0xff},
color.RGBA{0x00, 0x00, 0xdd, 0xff},
color.RGBA{0x00, 0x55, 0x00, 0xff},
color.RGBA{0x00, 0x55, 0x55, 0xff},
color.RGBA{0x00, 0x4c, 0x99, 0xff},
color.RGBA{0x00, 0x49, 0xdd, 0xff},
color.RGBA{0x00, 0x99, 0x00, 0xff},
color.RGBA{0x00, 0x99, 0x4c, 0xff},
color.RGBA{0x00, 0x99, 0x99, 0xff},
color.RGBA{0x00, 0x93, 0xdd, 0xff},
color.RGBA{0x00, 0xdd, 0x00, 0xff},
color.RGBA{0x00, 0xdd, 0x49, 0xff},
color.RGBA{0x00, 0xdd, 0x93, 0xff},
color.RGBA{0x00, 0xee, 0x9e, 0xff},
color.RGBA{0x00, 0xee, 0xee, 0xff},
color.RGBA{0x22, 0x22, 0x22, 0xff},
color.RGBA{0x00, 0x00, 0x66, 0xff},
color.RGBA{0x00, 0x00, 0xaa, 0xff},
color.RGBA{0x00, 0x00, 0xee, 0xff},
color.RGBA{0x00, 0x66, 0x00, 0xff},
color.RGBA{0x00, 0x66, 0x66, 0xff},
color.RGBA{0x00, 0x55, 0xaa, 0xff},
color.RGBA{0x00, 0x4f, 0xee, 0xff},
color.RGBA{0x00, 0xaa, 0x00, 0xff},
color.RGBA{0x00, 0xaa, 0x55, 0xff},
color.RGBA{0x00, 0xaa, 0xaa, 0xff},
color.RGBA{0x00, 0x9e, 0xee, 0xff},
color.RGBA{0x00, 0xee, 0x00, 0xff},
color.RGBA{0x00, 0xee, 0x4f, 0xff},
color.RGBA{0x00, 0xff, 0x55, 0xff},
color.RGBA{0x00, 0xff, 0xaa, 0xff},
color.RGBA{0x00, 0xff, 0xff, 0xff},
color.RGBA{0x33, 0x33, 0x33, 0xff},
color.RGBA{0x00, 0x00, 0x77, 0xff},
color.RGBA{0x00, 0x00, 0xbb, 0xff},
color.RGBA{0x00, 0x00, 0xff, 0xff},
color.RGBA{0x00, 0x77, 0x00, 0xff},
color.RGBA{0x00, 0x77, 0x77, 0xff},
color.RGBA{0x00, 0x5d, 0xbb, 0xff},
color.RGBA{0x00, 0x55, 0xff, 0xff},
color.RGBA{0x00, 0xbb, 0x00, 0xff},
color.RGBA{0x00, 0xbb, 0x5d, 0xff},
color.RGBA{0x00, 0xbb, 0xbb, 0xff},
color.RGBA{0x00, 0xaa, 0xff, 0xff},
color.RGBA{0x00, 0xff, 0x00, 0xff},
color.RGBA{0x44, 0x00, 0x44, 0xff},
color.RGBA{0x44, 0x00, 0x88, 0xff},
color.RGBA{0x44, 0x00, 0xcc, 0xff},
color.RGBA{0x44, 0x44, 0x00, 0xff},
color.RGBA{0x44, 0x44, 0x44, 0xff},
color.RGBA{0x44, 0x44, 0x88, 0xff},
color.RGBA{0x44, 0x44, 0xcc, 0xff},
color.RGBA{0x44, 0x88, 0x00, 0xff},
color.RGBA{0x44, 0x88, 0x44, 0xff},
color.RGBA{0x44, 0x88, 0x88, 0xff},
color.RGBA{0x44, 0x88, 0xcc, 0xff},
color.RGBA{0x44, 0xcc, 0x00, 0xff},
color.RGBA{0x44, 0xcc, 0x44, 0xff},
color.RGBA{0x44, 0xcc, 0x88, 0xff},
color.RGBA{0x44, 0xcc, 0xcc, 0xff},
color.RGBA{0x44, 0x00, 0x00, 0xff},
color.RGBA{0x55, 0x00, 0x00, 0xff},
color.RGBA{0x55, 0x00, 0x55, 0xff},
color.RGBA{0x4c, 0x00, 0x99, 0xff},
color.RGBA{0x49, 0x00, 0xdd, 0xff},
color.RGBA{0x55, 0x55, 0x00, 0xff},
color.RGBA{0x55, 0x55, 0x55, 0xff},
color.RGBA{0x4c, 0x4c, 0x99, 0xff},
color.RGBA{0x49, 0x49, 0xdd, 0xff},
color.RGBA{0x4c, 0x99, 0x00, 0xff},
color.RGBA{0x4c, 0x99, 0x4c, 0xff},
color.RGBA{0x4c, 0x99, 0x99, 0xff},
color.RGBA{0x49, 0x93, 0xdd, 0xff},
color.RGBA{0x49, 0xdd, 0x00, 0xff},
color.RGBA{0x49, 0xdd, 0x49, 0xff},
color.RGBA{0x49, 0xdd, 0x93, 0xff},
color.RGBA{0x49, 0xdd, 0xdd, 0xff},
color.RGBA{0x4f, 0xee, 0xee, 0xff},
color.RGBA{0x66, 0x00, 0x00, 0xff},
color.RGBA{0x66, 0x00, 0x66, 0xff},
color.RGBA{0x55, 0x00, 0xaa, 0xff},
color.RGBA{0x4f, 0x00, 0xee, 0xff},
color.RGBA{0x66, 0x66, 0x00, 0xff},
color.RGBA{0x66, 0x66, 0x66, 0xff},
color.RGBA{0x55, 0x55, 0xaa, 0xff},
color.RGBA{0x4f, 0x4f, 0xee, 0xff},
color.RGBA{0x55, 0xaa, 0x00, 0xff},
color.RGBA{0x55, 0xaa, 0x55, 0xff},
color.RGBA{0x55, 0xaa, 0xaa, 0xff},
color.RGBA{0x4f, 0x9e, 0xee, 0xff},
color.RGBA{0x4f, 0xee, 0x00, 0xff},
color.RGBA{0x4f, 0xee, 0x4f, 0xff},
color.RGBA{0x4f, 0xee, 0x9e, 0xff},
color.RGBA{0x55, 0xff, 0xaa, 0xff},
color.RGBA{0x55, 0xff, 0xff, 0xff},
color.RGBA{0x77, 0x00, 0x00, 0xff},
color.RGBA{0x77, 0x00, 0x77, 0xff},
color.RGBA{0x5d, 0x00, 0xbb, 0xff},
color.RGBA{0x55, 0x00, 0xff, 0xff},
color.RGBA{0x77, 0x77, 0x00, 0xff},
color.RGBA{0x77, 0x77, 0x77, 0xff},
color.RGBA{0x5d, 0x5d, 0xbb, 0xff},
color.RGBA{0x55, 0x55, 0xff, 0xff},
color.RGBA{0x5d, 0xbb, 0x00, 0xff},
color.RGBA{0x5d, 0xbb, 0x5d, 0xff},
color.RGBA{0x5d, 0xbb, 0xbb, 0xff},
color.RGBA{0x55, 0xaa, 0xff, 0xff},
color.RGBA{0x55, 0xff, 0x00, 0xff},
color.RGBA{0x55, 0xff, 0x55, 0xff},
color.RGBA{0x88, 0x00, 0x88, 0xff},
color.RGBA{0x88, 0x00, 0xcc, 0xff},
color.RGBA{0x88, 0x44, 0x00, 0xff},
color.RGBA{0x88, 0x44, 0x44, 0xff},
color.RGBA{0x88, 0x44, 0x88, 0xff},
color.RGBA{0x88, 0x44, 0xcc, 0xff},
color.RGBA{0x88, 0x88, 0x00, 0xff},
color.RGBA{0x88, 0x88, 0x44, 0xff},
color.RGBA{0x88, 0x88, 0x88, 0xff},
color.RGBA{0x88, 0x88, 0xcc, 0xff},
color.RGBA{0x88, 0xcc, 0x00, 0xff},
color.RGBA{0x88, 0xcc, 0x44, 0xff},
color.RGBA{0x88, 0xcc, 0x88, 0xff},
color.RGBA{0x88, 0xcc, 0xcc, 0xff},
color.RGBA{0x88, 0x00, 0x00, 0xff},
color.RGBA{0x88, 0x00, 0x44, 0xff},
color.RGBA{0x99, 0x00, 0x4c, 0xff},
color.RGBA{0x99, 0x00, 0x99, 0xff},
color.RGBA{0x93, 0x00, 0xdd, 0xff},
color.RGBA{0x99, 0x4c, 0x00, 0xff},
color.RGBA{0x99, 0x4c, 0x4c, 0xff},
color.RGBA{0x99, 0x4c, 0x99, 0xff},
color.RGBA{0x93, 0x49, 0xdd, 0xff},
color.RGBA{0x99, 0x99, 0x00, 0xff},
color.RGBA{0x99, 0x99, 0x4c, 0xff},
color.RGBA{0x99, 0x99, 0x99, 0xff},
color.RGBA{0x93, 0x93, 0xdd, 0xff},
color.RGBA{0x93, 0xdd, 0x00, 0xff},
color.RGBA{0x93, 0xdd, 0x49, 0xff},
color.RGBA{0x93, 0xdd, 0x93, 0xff},
color.RGBA{0x93, 0xdd, 0xdd, 0xff},
color.RGBA{0x99, 0x00, 0x00, 0xff},
color.RGBA{0xaa, 0x00, 0x00, 0xff},
color.RGBA{0xaa, 0x00, 0x55, 0xff},
color.RGBA{0xaa, 0x00, 0xaa, 0xff},
color.RGBA{0x9e, 0x00, 0xee, 0xff},
color.RGBA{0xaa, 0x55, 0x00, 0xff},
color.RGBA{0xaa, 0x55, 0x55, 0xff},
color.RGBA{0xaa, 0x55, 0xaa, 0xff},
color.RGBA{0x9e, 0x4f, 0xee, 0xff},
color.RGBA{0xaa, 0xaa, 0x00, 0xff},
color.RGBA{0xaa, 0xaa, 0x55, 0xff},
color.RGBA{0xaa, 0xaa, 0xaa, 0xff},
color.RGBA{0x9e, 0x9e, 0xee, 0xff},
color.RGBA{0x9e, 0xee, 0x00, 0xff},
color.RGBA{0x9e, 0xee, 0x4f, 0xff},
color.RGBA{0x9e, 0xee, 0x9e, 0xff},
color.RGBA{0x9e, 0xee, 0xee, 0xff},
color.RGBA{0xaa, 0xff, 0xff, 0xff},
color.RGBA{0xbb, 0x00, 0x00, 0xff},
color.RGBA{0xbb, 0x00, 0x5d, 0xff},
color.RGBA{0xbb, 0x00, 0xbb, 0xff},
color.RGBA{0xaa, 0x00, 0xff, 0xff},
color.RGBA{0xbb, 0x5d, 0x00, 0xff},
color.RGBA{0xbb, 0x5d, 0x5d, 0xff},
color.RGBA{0xbb, 0x5d, 0xbb, 0xff},
color.RGBA{0xaa, 0x55, 0xff, 0xff},
color.RGBA{0xbb, 0xbb, 0x00, 0xff},
color.RGBA{0xbb, 0xbb, 0x5d, 0xff},
color.RGBA{0xbb, 0xbb, 0xbb, 0xff},
color.RGBA{0xaa, 0xaa, 0xff, 0xff},
color.RGBA{0xaa, 0xff, 0x00, 0xff},
color.RGBA{0xaa, 0xff, 0x55, 0xff},
color.RGBA{0xaa, 0xff, 0xaa, 0xff},
color.RGBA{0xcc, 0x00, 0xcc, 0xff},
color.RGBA{0xcc, 0x44, 0x00, 0xff},
color.RGBA{0xcc, 0x44, 0x44, 0xff},
color.RGBA{0xcc, 0x44, 0x88, 0xff},
color.RGBA{0xcc, 0x44, 0xcc, 0xff},
color.RGBA{0xcc, 0x88, 0x00, 0xff},
color.RGBA{0xcc, 0x88, 0x44, 0xff},
color.RGBA{0xcc, 0x88, 0x88, 0xff},
color.RGBA{0xcc, 0x88, 0xcc, 0xff},
color.RGBA{0xcc, 0xcc, 0x00, 0xff},
color.RGBA{0xcc, 0xcc, 0x44, 0xff},
color.RGBA{0xcc, 0xcc, 0x88, 0xff},
color.RGBA{0xcc, 0xcc, 0xcc, 0xff},
color.RGBA{0xcc, 0x00, 0x00, 0xff},
color.RGBA{0xcc, 0x00, 0x44, 0xff},
color.RGBA{0xcc, 0x00, 0x88, 0xff},
color.RGBA{0xdd, 0x00, 0x93, 0xff},
color.RGBA{0xdd, 0x00, 0xdd, 0xff},
color.RGBA{0xdd, 0x49, 0x00, 0xff},
color.RGBA{0xdd, 0x49, 0x49, 0xff},
color.RGBA{0xdd, 0x49, 0x93, 0xff},
color.RGBA{0xdd, 0x49, 0xdd, 0xff},
color.RGBA{0xdd, 0x93, 0x00, 0xff},
color.RGBA{0xdd, 0x93, 0x49, 0xff},
color.RGBA{0xdd, 0x93, 0x93, 0xff},
color.RGBA{0xdd, 0x93, 0xdd, 0xff},
color.RGBA{0xdd, 0xdd, 0x00, 0xff},
color.RGBA{0xdd, 0xdd, 0x49, 0xff},
color.RGBA{0xdd, 0xdd, 0x93, 0xff},
color.RGBA{0xdd, 0xdd, 0xdd, 0xff},
color.RGBA{0xdd, 0x00, 0x00, 0xff},
color.RGBA{0xdd, 0x00, 0x49, 0xff},
color.RGBA{0xee, 0x00, 0x4f, 0xff},
color.RGBA{0xee, 0x00, 0x9e, 0xff},
color.RGBA{0xee, 0x00, 0xee, 0xff},
color.RGBA{0xee, 0x4f, 0x00, 0xff},
color.RGBA{0xee, 0x4f, 0x4f, 0xff},
color.RGBA{0xee, 0x4f, 0x9e, 0xff},
color.RGBA{0xee, 0x4f, 0xee, 0xff},
color.RGBA{0xee, 0x9e, 0x00, 0xff},
color.RGBA{0xee, 0x9e, 0x4f, 0xff},
color.RGBA{0xee, 0x9e, 0x9e, 0xff},
color.RGBA{0xee, 0x9e, 0xee, 0xff},
color.RGBA{0xee, 0xee, 0x00, 0xff},
color.RGBA{0xee, 0xee, 0x4f, 0xff},
color.RGBA{0xee, 0xee, 0x9e, 0xff},
color.RGBA{0xee, 0xee, 0xee, 0xff},
color.RGBA{0xee, 0x00, 0x00, 0xff},
color.RGBA{0xff, 0x00, 0x00, 0xff},
color.RGBA{0xff, 0x00, 0x55, 0xff},
color.RGBA{0xff, 0x00, 0xaa, 0xff},
color.RGBA{0xff, 0x00, 0xff, 0xff},
color.RGBA{0xff, 0x55, 0x00, 0xff},
color.RGBA{0xff, 0x55, 0x55, 0xff},
color.RGBA{0xff, 0x55, 0xaa, 0xff},
color.RGBA{0xff, 0x55, 0xff, 0xff},
color.RGBA{0xff, 0xaa, 0x00, 0xff},
color.RGBA{0xff, 0xaa, 0x55, 0xff},
color.RGBA{0xff, 0xaa, 0xaa, 0xff},
color.RGBA{0xff, 0xaa, 0xff, 0xff},
color.RGBA{0xff, 0xff, 0x00, 0xff},
color.RGBA{0xff, 0xff, 0x55, 0xff},
color.RGBA{0xff, 0xff, 0xaa, 0xff},
color.RGBA{0xff, 0xff, 0xff, 0xff},
}
// WebSafe is a 216-color palette that was popularized by early versions
// of Netscape Navigator. It is also known as the Netscape Color Cube.
//
// See http://en.wikipedia.org/wiki/Web_colors#Web-safe_colors for details.
var WebSafe = []color.Color{
color.RGBA{0x00, 0x00, 0x00, 0xff},
color.RGBA{0x00, 0x00, 0x33, 0xff},
color.RGBA{0x00, 0x00, 0x66, 0xff},
color.RGBA{0x00, 0x00, 0x99, 0xff},
color.RGBA{0x00, 0x00, 0xcc, 0xff},
color.RGBA{0x00, 0x00, 0xff, 0xff},
color.RGBA{0x00, 0x33, 0x00, 0xff},
color.RGBA{0x00, 0x33, 0x33, 0xff},
color.RGBA{0x00, 0x33, 0x66, 0xff},
color.RGBA{0x00, 0x33, 0x99, 0xff},
color.RGBA{0x00, 0x33, 0xcc, 0xff},
color.RGBA{0x00, 0x33, 0xff, 0xff},
color.RGBA{0x00, 0x66, 0x00, 0xff},
color.RGBA{0x00, 0x66, 0x33, 0xff},
color.RGBA{0x00, 0x66, 0x66, 0xff},
color.RGBA{0x00, 0x66, 0x99, 0xff},
color.RGBA{0x00, 0x66, 0xcc, 0xff},
color.RGBA{0x00, 0x66, 0xff, 0xff},
color.RGBA{0x00, 0x99, 0x00, 0xff},
color.RGBA{0x00, 0x99, 0x33, 0xff},
color.RGBA{0x00, 0x99, 0x66, 0xff},
color.RGBA{0x00, 0x99, 0x99, 0xff},
color.RGBA{0x00, 0x99, 0xcc, 0xff},
color.RGBA{0x00, 0x99, 0xff, 0xff},
color.RGBA{0x00, 0xcc, 0x00, 0xff},
color.RGBA{0x00, 0xcc, 0x33, 0xff},
color.RGBA{0x00, 0xcc, 0x66, 0xff},
color.RGBA{0x00, 0xcc, 0x99, 0xff},
color.RGBA{0x00, 0xcc, 0xcc, 0xff},
color.RGBA{0x00, 0xcc, 0xff, 0xff},
color.RGBA{0x00, 0xff, 0x00, 0xff},
color.RGBA{0x00, 0xff, 0x33, 0xff},
color.RGBA{0x00, 0xff, 0x66, 0xff},
color.RGBA{0x00, 0xff, 0x99, 0xff},
color.RGBA{0x00, 0xff, 0xcc, 0xff},
color.RGBA{0x00, 0xff, 0xff, 0xff},
color.RGBA{0x33, 0x00, 0x00, 0xff},
color.RGBA{0x33, 0x00, 0x33, 0xff},
color.RGBA{0x33, 0x00, 0x66, 0xff},
color.RGBA{0x33, 0x00, 0x99, 0xff},
color.RGBA{0x33, 0x00, 0xcc, 0xff},
color.RGBA{0x33, 0x00, 0xff, 0xff},
color.RGBA{0x33, 0x33, 0x00, 0xff},
color.RGBA{0x33, 0x33, 0x33, 0xff},
color.RGBA{0x33, 0x33, 0x66, 0xff},
color.RGBA{0x33, 0x33, 0x99, 0xff},
color.RGBA{0x33, 0x33, 0xcc, 0xff},
color.RGBA{0x33, 0x33, 0xff, 0xff},
color.RGBA{0x33, 0x66, 0x00, 0xff},
color.RGBA{0x33, 0x66, 0x33, 0xff},
color.RGBA{0x33, 0x66, 0x66, 0xff},
color.RGBA{0x33, 0x66, 0x99, 0xff},
color.RGBA{0x33, 0x66, 0xcc, 0xff},
color.RGBA{0x33, 0x66, 0xff, 0xff},
color.RGBA{0x33, 0x99, 0x00, 0xff},
color.RGBA{0x33, 0x99, 0x33, 0xff},
color.RGBA{0x33, 0x99, 0x66, 0xff},
color.RGBA{0x33, 0x99, 0x99, 0xff},
color.RGBA{0x33, 0x99, 0xcc, 0xff},
color.RGBA{0x33, 0x99, 0xff, 0xff},
color.RGBA{0x33, 0xcc, 0x00, 0xff},
color.RGBA{0x33, 0xcc, 0x33, 0xff},
color.RGBA{0x33, 0xcc, 0x66, 0xff},
color.RGBA{0x33, 0xcc, 0x99, 0xff},
color.RGBA{0x33, 0xcc, 0xcc, 0xff},
color.RGBA{0x33, 0xcc, 0xff, 0xff},
color.RGBA{0x33, 0xff, 0x00, 0xff},
color.RGBA{0x33, 0xff, 0x33, 0xff},
color.RGBA{0x33, 0xff, 0x66, 0xff},
color.RGBA{0x33, 0xff, 0x99, 0xff},
color.RGBA{0x33, 0xff, 0xcc, 0xff},
color.RGBA{0x33, 0xff, 0xff, 0xff},
color.RGBA{0x66, 0x00, 0x00, 0xff},
color.RGBA{0x66, 0x00, 0x33, 0xff},
color.RGBA{0x66, 0x00, 0x66, 0xff},
color.RGBA{0x66, 0x00, 0x99, 0xff},
color.RGBA{0x66, 0x00, 0xcc, 0xff},
color.RGBA{0x66, 0x00, 0xff, 0xff},
color.RGBA{0x66, 0x33, 0x00, 0xff},
color.RGBA{0x66, 0x33, 0x33, 0xff},
color.RGBA{0x66, 0x33, 0x66, 0xff},
color.RGBA{0x66, 0x33, 0x99, 0xff},
color.RGBA{0x66, 0x33, 0xcc, 0xff},
color.RGBA{0x66, 0x33, 0xff, 0xff},
color.RGBA{0x66, 0x66, 0x00, 0xff},
color.RGBA{0x66, 0x66, 0x33, 0xff},
color.RGBA{0x66, 0x66, 0x66, 0xff},
color.RGBA{0x66, 0x66, 0x99, 0xff},
color.RGBA{0x66, 0x66, 0xcc, 0xff},
color.RGBA{0x66, 0x66, 0xff, 0xff},
color.RGBA{0x66, 0x99, 0x00, 0xff},
color.RGBA{0x66, 0x99, 0x33, 0xff},
color.RGBA{0x66, 0x99, 0x66, 0xff},
color.RGBA{0x66, 0x99, 0x99, 0xff},
color.RGBA{0x66, 0x99, 0xcc, 0xff},
color.RGBA{0x66, 0x99, 0xff, 0xff},
color.RGBA{0x66, 0xcc, 0x00, 0xff},
color.RGBA{0x66, 0xcc, 0x33, 0xff},
color.RGBA{0x66, 0xcc, 0x66, 0xff},
color.RGBA{0x66, 0xcc, 0x99, 0xff},
color.RGBA{0x66, 0xcc, 0xcc, 0xff},
color.RGBA{0x66, 0xcc, 0xff, 0xff},
color.RGBA{0x66, 0xff, 0x00, 0xff},
color.RGBA{0x66, 0xff, 0x33, 0xff},
color.RGBA{0x66, 0xff, 0x66, 0xff},
color.RGBA{0x66, 0xff, 0x99, 0xff},
color.RGBA{0x66, 0xff, 0xcc, 0xff},
color.RGBA{0x66, 0xff, 0xff, 0xff},
color.RGBA{0x99, 0x00, 0x00, 0xff},
color.RGBA{0x99, 0x00, 0x33, 0xff},
color.RGBA{0x99, 0x00, 0x66, 0xff},
color.RGBA{0x99, 0x00, 0x99, 0xff},
color.RGBA{0x99, 0x00, 0xcc, 0xff},
color.RGBA{0x99, 0x00, 0xff, 0xff},
color.RGBA{0x99, 0x33, 0x00, 0xff},
color.RGBA{0x99, 0x33, 0x33, 0xff},
color.RGBA{0x99, 0x33, 0x66, 0xff},
color.RGBA{0x99, 0x33, 0x99, 0xff},
color.RGBA{0x99, 0x33, 0xcc, 0xff},
color.RGBA{0x99, 0x33, 0xff, 0xff},
color.RGBA{0x99, 0x66, 0x00, 0xff},
color.RGBA{0x99, 0x66, 0x33, 0xff},
color.RGBA{0x99, 0x66, 0x66, 0xff},
color.RGBA{0x99, 0x66, 0x99, 0xff},
color.RGBA{0x99, 0x66, 0xcc, 0xff},
color.RGBA{0x99, 0x66, 0xff, 0xff},
color.RGBA{0x99, 0x99, 0x00, 0xff},
color.RGBA{0x99, 0x99, 0x33, 0xff},
color.RGBA{0x99, 0x99, 0x66, 0xff},
color.RGBA{0x99, 0x99, 0x99, 0xff},
color.RGBA{0x99, 0x99, 0xcc, 0xff},
color.RGBA{0x99, 0x99, 0xff, 0xff},
color.RGBA{0x99, 0xcc, 0x00, 0xff},
color.RGBA{0x99, 0xcc, 0x33, 0xff},
color.RGBA{0x99, 0xcc, 0x66, 0xff},
color.RGBA{0x99, 0xcc, 0x99, 0xff},
color.RGBA{0x99, 0xcc, 0xcc, 0xff},
color.RGBA{0x99, 0xcc, 0xff, 0xff},
color.RGBA{0x99, 0xff, 0x00, 0xff},
color.RGBA{0x99, 0xff, 0x33, 0xff},
color.RGBA{0x99, 0xff, 0x66, 0xff},
color.RGBA{0x99, 0xff, 0x99, 0xff},
color.RGBA{0x99, 0xff, 0xcc, 0xff},
color.RGBA{0x99, 0xff, 0xff, 0xff},
color.RGBA{0xcc, 0x00, 0x00, 0xff},
color.RGBA{0xcc, 0x00, 0x33, 0xff},
color.RGBA{0xcc, 0x00, 0x66, 0xff},
color.RGBA{0xcc, 0x00, 0x99, 0xff},
color.RGBA{0xcc, 0x00, 0xcc, 0xff},
color.RGBA{0xcc, 0x00, 0xff, 0xff},
color.RGBA{0xcc, 0x33, 0x00, 0xff},
color.RGBA{0xcc, 0x33, 0x33, 0xff},
color.RGBA{0xcc, 0x33, 0x66, 0xff},
color.RGBA{0xcc, 0x33, 0x99, 0xff},
color.RGBA{0xcc, 0x33, 0xcc, 0xff},
color.RGBA{0xcc, 0x33, 0xff, 0xff},
color.RGBA{0xcc, 0x66, 0x00, 0xff},
color.RGBA{0xcc, 0x66, 0x33, 0xff},
color.RGBA{0xcc, 0x66, 0x66, 0xff},
color.RGBA{0xcc, 0x66, 0x99, 0xff},
color.RGBA{0xcc, 0x66, 0xcc, 0xff},
color.RGBA{0xcc, 0x66, 0xff, 0xff},
color.RGBA{0xcc, 0x99, 0x00, 0xff},
color.RGBA{0xcc, 0x99, 0x33, 0xff},
color.RGBA{0xcc, 0x99, 0x66, 0xff},
color.RGBA{0xcc, 0x99, 0x99, 0xff},
color.RGBA{0xcc, 0x99, 0xcc, 0xff},
color.RGBA{0xcc, 0x99, 0xff, 0xff},
color.RGBA{0xcc, 0xcc, 0x00, 0xff},
color.RGBA{0xcc, 0xcc, 0x33, 0xff},
color.RGBA{0xcc, 0xcc, 0x66, 0xff},
color.RGBA{0xcc, 0xcc, 0x99, 0xff},
color.RGBA{0xcc, 0xcc, 0xcc, 0xff},
color.RGBA{0xcc, 0xcc, 0xff, 0xff},
color.RGBA{0xcc, 0xff, 0x00, 0xff},
color.RGBA{0xcc, 0xff, 0x33, 0xff},
color.RGBA{0xcc, 0xff, 0x66, 0xff},
color.RGBA{0xcc, 0xff, 0x99, 0xff},
color.RGBA{0xcc, 0xff, 0xcc, 0xff},
color.RGBA{0xcc, 0xff, 0xff, 0xff},
color.RGBA{0xff, 0x00, 0x00, 0xff},
color.RGBA{0xff, 0x00, 0x33, 0xff},
color.RGBA{0xff, 0x00, 0x66, 0xff},
color.RGBA{0xff, 0x00, 0x99, 0xff},
color.RGBA{0xff, 0x00, 0xcc, 0xff},
color.RGBA{0xff, 0x00, 0xff, 0xff},
color.RGBA{0xff, 0x33, 0x00, 0xff},
color.RGBA{0xff, 0x33, 0x33, 0xff},
color.RGBA{0xff, 0x33, 0x66, 0xff},
color.RGBA{0xff, 0x33, 0x99, 0xff},
color.RGBA{0xff, 0x33, 0xcc, 0xff},
color.RGBA{0xff, 0x33, 0xff, 0xff},
color.RGBA{0xff, 0x66, 0x00, 0xff},
color.RGBA{0xff, 0x66, 0x33, 0xff},
color.RGBA{0xff, 0x66, 0x66, 0xff},
color.RGBA{0xff, 0x66, 0x99, 0xff},
color.RGBA{0xff, 0x66, 0xcc, 0xff},
color.RGBA{0xff, 0x66, 0xff, 0xff},
color.RGBA{0xff, 0x99, 0x00, 0xff},
color.RGBA{0xff, 0x99, 0x33, 0xff},
color.RGBA{0xff, 0x99, 0x66, 0xff},
color.RGBA{0xff, 0x99, 0x99, 0xff},
color.RGBA{0xff, 0x99, 0xcc, 0xff},
color.RGBA{0xff, 0x99, 0xff, 0xff},
color.RGBA{0xff, 0xcc, 0x00, 0xff},
color.RGBA{0xff, 0xcc, 0x33, 0xff},
color.RGBA{0xff, 0xcc, 0x66, 0xff},
color.RGBA{0xff, 0xcc, 0x99, 0xff},
color.RGBA{0xff, 0xcc, 0xcc, 0xff},
color.RGBA{0xff, 0xcc, 0xff, 0xff},
color.RGBA{0xff, 0xff, 0x00, 0xff},
color.RGBA{0xff, 0xff, 0x33, 0xff},
color.RGBA{0xff, 0xff, 0x66, 0xff},
color.RGBA{0xff, 0xff, 0x99, 0xff},
color.RGBA{0xff, 0xff, 0xcc, 0xff},
color.RGBA{0xff, 0xff, 0xff, 0xff},
}

22
src/pkg/image/gif/reader_test.go
View File

@ -11,11 +11,11 @@ import (
// header, palette and trailer are parts of a valid 2x1 GIF image. // header, palette and trailer are parts of a valid 2x1 GIF image.
const ( const (
header = "GIF89a" + headerStr = "GIF89a" +
"\x02\x00\x01\x00" + // width=2, height=1 "\x02\x00\x01\x00" + // width=2, height=1
"\x80\x00\x00" // headerFields=(a color map of 2 pixels), backgroundIndex, aspect "\x80\x00\x00" // headerFields=(a color map of 2 pixels), backgroundIndex, aspect
palette = "\x10\x20\x30\x40\x50\x60" // the color map, also known as a palette paletteStr = "\x10\x20\x30\x40\x50\x60" // the color map, also known as a palette
trailer = "\x3b" trailerStr = "\x3b"
) )
func TestDecode(t *testing.T) { func TestDecode(t *testing.T) {
@ -41,8 +41,8 @@ func TestDecode(t *testing.T) {
} }
for _, tc := range testCases { for _, tc := range testCases {
b := &bytes.Buffer{} b := &bytes.Buffer{}
b.WriteString(header) b.WriteString(headerStr)
b.WriteString(palette) b.WriteString(paletteStr)
// Write an image with bounds 2x1 but tc.nPix pixels. If tc.nPix != 2 // Write an image with bounds 2x1 but tc.nPix pixels. If tc.nPix != 2
// then this should result in an invalid GIF image. First, write a // then this should result in an invalid GIF image. First, write a
// magic 0x2c (image descriptor) byte, bounds=(0,0)-(2,1), a flags // magic 0x2c (image descriptor) byte, bounds=(0,0)-(2,1), a flags
@ -61,7 +61,7 @@ func TestDecode(t *testing.T) {
b.WriteString("\x01\x02") // A 1-byte payload with an 0x02 byte. b.WriteString("\x01\x02") // A 1-byte payload with an 0x02 byte.
} }
b.WriteByte(0x00) // An empty block signifies the end of the image data. b.WriteByte(0x00) // An empty block signifies the end of the image data.
b.WriteString(trailer) b.WriteString(trailerStr)
got, err := Decode(b) got, err := Decode(b)
if err != tc.wantErr { if err != tc.wantErr {
@ -143,7 +143,7 @@ func TestNoPalette(t *testing.T) {
// Manufacture a GIF with no palette, so any pixel at all // Manufacture a GIF with no palette, so any pixel at all
// will be invalid. // will be invalid.
b.WriteString(header[:len(header)-3]) b.WriteString(headerStr[:len(headerStr)-3])
b.WriteString("\x00\x00\x00") // No global palette. b.WriteString("\x00\x00\x00") // No global palette.
// Image descriptor: 2x1, no local palette. // Image descriptor: 2x1, no local palette.
@ -159,7 +159,7 @@ func TestNoPalette(t *testing.T) {
b.Write(enc.Bytes()) b.Write(enc.Bytes())
b.WriteByte(0x00) // An empty block signifies the end of the image data. b.WriteByte(0x00) // An empty block signifies the end of the image data.
b.WriteString(trailer) b.WriteString(trailerStr)
try(t, b.Bytes(), "gif: invalid pixel value") try(t, b.Bytes(), "gif: invalid pixel value")
} }
@ -169,8 +169,8 @@ func TestPixelOutsidePaletteRange(t *testing.T) {
b := &bytes.Buffer{} b := &bytes.Buffer{}
// Manufacture a GIF with a 2 color palette. // Manufacture a GIF with a 2 color palette.
b.WriteString(header) b.WriteString(headerStr)
b.WriteString(palette) b.WriteString(paletteStr)
// Image descriptor: 2x1, no local palette. // Image descriptor: 2x1, no local palette.
b.WriteString("\x2c\x00\x00\x00\x00\x02\x00\x01\x00\x00\x02") b.WriteString("\x2c\x00\x00\x00\x00\x02\x00\x01\x00\x00\x02")
@ -185,7 +185,7 @@ func TestPixelOutsidePaletteRange(t *testing.T) {
b.Write(enc.Bytes()) b.Write(enc.Bytes())
b.WriteByte(0x00) // An empty block signifies the end of the image data. b.WriteByte(0x00) // An empty block signifies the end of the image data.
b.WriteString(trailer) b.WriteString(trailerStr)
// No error expected, unless the pixels are beyond the 2 color palette. // No error expected, unless the pixels are beyond the 2 color palette.
want := "" want := ""

5
src/pkg/image/gif/writer.go
View File

@ -10,6 +10,7 @@ import (
"errors" "errors"
"image" "image"
"image/color" "image/color"
"image/color/palette"
"image/draw" "image/draw"
"io" "io"
) )
@ -248,7 +249,7 @@ type Options struct {
NumColors int NumColors int
// Quantizer is used to produce a palette with size NumColors. // Quantizer is used to produce a palette with size NumColors.
// color.Plan9Palette is used in place of a nil Quantizer. // palette.Plan9 is used in place of a nil Quantizer.
Quantizer draw.Quantizer Quantizer draw.Quantizer
// Drawer is used to convert the source image to the desired palette. // Drawer is used to convert the source image to the desired palette.
@ -308,7 +309,7 @@ func Encode(w io.Writer, m image.Image, o *Options) error {
pm, ok := m.(*image.Paletted) pm, ok := m.(*image.Paletted)
if !ok || len(pm.Palette) > opts.NumColors { if !ok || len(pm.Palette) > opts.NumColors {
// TODO: Pick a better sub-sample of the Plan 9 palette. // TODO: Pick a better sub-sample of the Plan 9 palette.
pm = image.NewPaletted(b, color.Plan9Palette[:opts.NumColors]) pm = image.NewPaletted(b, palette.Plan9[:opts.NumColors])
if opts.Quantizer != nil { if opts.Quantizer != nil {
pm.Palette = opts.Quantizer.Quantize(make(color.Palette, 0, opts.NumColors), m) pm.Palette = opts.Quantizer.Quantize(make(color.Palette, 0, opts.NumColors), m)
} }