mirror of
https://github.com/walles/moar.git
synced 2024-09-11 20:17:13 +03:00
49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
package twin
|
|
|
|
func color256ToRGB(color256 uint8) (r, g, b uint8) {
|
|
if color256 < 16 {
|
|
// Standard ANSI colors
|
|
r := standardAnsiColors[color256][0]
|
|
g := standardAnsiColors[color256][1]
|
|
b := standardAnsiColors[color256][2]
|
|
return r, g, b
|
|
}
|
|
|
|
if color256 >= 232 {
|
|
// Grayscale. Colors 232-255 map to components 0x08 to 0xee
|
|
gray := (color256-232)*0x0a + 0x08
|
|
return gray, gray, gray
|
|
}
|
|
|
|
// 6x6 color cube
|
|
color0to215 := color256 - 16
|
|
|
|
components := []uint8{0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff}
|
|
r = components[(color0to215/36)%6]
|
|
g = components[(color0to215/6)%6]
|
|
b = components[(color0to215/1)%6]
|
|
return r, g, b
|
|
}
|
|
|
|
// Source, the 256 colors table from here:
|
|
// https://en.wikipedia.org/wiki/ANSI_escape_code#3-bit_and_4-bit
|
|
var standardAnsiColors = [16][3]uint8{
|
|
{0x00, 0x00, 0x00}, // Black
|
|
{0x80, 0x00, 0x00}, // Red
|
|
{0x00, 0x80, 0x00}, // Green
|
|
{0x80, 0x80, 0x00}, // Yellow
|
|
{0x00, 0x00, 0x80}, // Blue
|
|
{0x80, 0x00, 0x80}, // Magenta
|
|
{0x00, 0x80, 0x80}, // Cyan
|
|
{0x80, 0x80, 0x80}, // White
|
|
|
|
{0x80, 0x80, 0x80}, // Bright Black
|
|
{0xff, 0x00, 0x00}, // Bright Red
|
|
{0x00, 0xff, 0x00}, // Bright Green
|
|
{0xff, 0xff, 0x00}, // Bright Yellow
|
|
{0x00, 0x00, 0xff}, // Bright Blue
|
|
{0xff, 0x00, 0xff}, // Bright Magenta
|
|
{0x00, 0xff, 0xff}, // Bright Cyan
|
|
{0xff, 0xff, 0xff}, // Bright White
|
|
}
|