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colors.go
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colors.go
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package fansiterm
import (
"image"
"image/color"
)
var (
// These Colors are for the 4-bit ANSI colors
// Since they're exported, they can be overridden.
// It would be convient to have a pallet, but given
// TrueColor support, why bother?
ColorBlack = NewOpaqueColor(0, 0, 0)
ColorBrightBlack = NewOpaqueColor(85, 85, 85)
ColorRed = NewOpaqueColor(127, 0, 0)
ColorBrightRed = NewOpaqueColor(255, 0, 0)
ColorGreen = NewOpaqueColor(0, 170, 0)
ColorBrightGreen = NewOpaqueColor(85, 255, 85)
ColorYellow = NewOpaqueColor(170, 85, 0)
ColorBrightYellow = NewOpaqueColor(255, 255, 85)
ColorBlue = NewOpaqueColor(0, 0, 170)
ColorBrightBlue = NewOpaqueColor(85, 85, 255)
ColorMagenta = NewOpaqueColor(170, 0, 170)
ColorBrightMagenta = NewOpaqueColor(255, 85, 255)
ColorCyan = NewOpaqueColor(0, 170, 170)
ColorBrightCyan = NewOpaqueColor(85, 255, 255)
// Okay, I deviated from VGA colors here. VGA "white" is way too gray.
ColorWhite = NewOpaqueColor(240, 240, 240)
// ColorWhite = NewOpaqueColor(170, 170, 170)
ColorBrightWhite = NewOpaqueColor(255, 255, 255)
)
// Colors256 defines the default set of 256 Colors
var Colors256 = [256]Color{
NewOpaqueColor(0, 0, 0),
NewOpaqueColor(128, 0, 0),
NewOpaqueColor(0, 128, 0),
NewOpaqueColor(128, 128, 0),
NewOpaqueColor(0, 0, 128),
NewOpaqueColor(128, 0, 128),
NewOpaqueColor(0, 128, 128),
NewOpaqueColor(192, 192, 192),
NewOpaqueColor(128, 128, 128),
NewOpaqueColor(255, 0, 0),
NewOpaqueColor(0, 255, 0),
NewOpaqueColor(255, 255, 0),
NewOpaqueColor(0, 0, 255),
NewOpaqueColor(255, 0, 255),
NewOpaqueColor(0, 255, 255),
NewOpaqueColor(255, 255, 255),
NewOpaqueColor(0, 0, 0),
NewOpaqueColor(0, 0, 95),
NewOpaqueColor(0, 0, 135),
NewOpaqueColor(0, 0, 175),
NewOpaqueColor(0, 0, 215),
NewOpaqueColor(0, 0, 255),
NewOpaqueColor(0, 95, 0),
NewOpaqueColor(0, 95, 95),
NewOpaqueColor(0, 95, 135),
NewOpaqueColor(0, 95, 175),
NewOpaqueColor(0, 95, 215),
NewOpaqueColor(0, 95, 255),
NewOpaqueColor(0, 135, 0),
NewOpaqueColor(0, 135, 95),
NewOpaqueColor(0, 135, 135),
NewOpaqueColor(0, 135, 175),
NewOpaqueColor(0, 135, 215),
NewOpaqueColor(0, 135, 255),
NewOpaqueColor(0, 175, 0),
NewOpaqueColor(0, 175, 95),
NewOpaqueColor(0, 175, 135),
NewOpaqueColor(0, 175, 175),
NewOpaqueColor(0, 175, 215),
NewOpaqueColor(0, 175, 255),
NewOpaqueColor(0, 215, 0),
NewOpaqueColor(0, 215, 95),
NewOpaqueColor(0, 215, 135),
NewOpaqueColor(0, 215, 175),
NewOpaqueColor(0, 215, 215),
NewOpaqueColor(0, 215, 255),
NewOpaqueColor(0, 255, 0),
NewOpaqueColor(0, 255, 95),
NewOpaqueColor(0, 255, 135),
NewOpaqueColor(0, 255, 175),
NewOpaqueColor(0, 255, 215),
NewOpaqueColor(0, 255, 255),
NewOpaqueColor(95, 0, 0),
NewOpaqueColor(95, 0, 95),
NewOpaqueColor(95, 0, 135),
NewOpaqueColor(95, 0, 175),
NewOpaqueColor(95, 0, 215),
NewOpaqueColor(95, 0, 255),
NewOpaqueColor(95, 95, 0),
NewOpaqueColor(95, 95, 95),
NewOpaqueColor(95, 95, 135),
NewOpaqueColor(95, 95, 175),
NewOpaqueColor(95, 95, 215),
NewOpaqueColor(95, 95, 255),
NewOpaqueColor(95, 135, 0),
NewOpaqueColor(95, 135, 95),
NewOpaqueColor(95, 135, 135),
NewOpaqueColor(95, 135, 175),
NewOpaqueColor(95, 135, 215),
NewOpaqueColor(95, 135, 255),
NewOpaqueColor(95, 175, 0),
NewOpaqueColor(95, 175, 95),
NewOpaqueColor(95, 175, 135),
NewOpaqueColor(95, 175, 175),
NewOpaqueColor(95, 175, 215),
NewOpaqueColor(95, 175, 255),
NewOpaqueColor(95, 215, 0),
NewOpaqueColor(95, 215, 95),
NewOpaqueColor(95, 215, 135),
NewOpaqueColor(95, 215, 175),
NewOpaqueColor(95, 215, 215),
NewOpaqueColor(95, 215, 255),
NewOpaqueColor(95, 255, 0),
NewOpaqueColor(95, 255, 95),
NewOpaqueColor(95, 255, 135),
NewOpaqueColor(95, 255, 175),
NewOpaqueColor(95, 255, 215),
NewOpaqueColor(95, 255, 255),
NewOpaqueColor(135, 0, 0),
NewOpaqueColor(135, 0, 95),
NewOpaqueColor(135, 0, 135),
NewOpaqueColor(135, 0, 175),
NewOpaqueColor(135, 0, 215),
NewOpaqueColor(135, 0, 255),
NewOpaqueColor(135, 95, 0),
NewOpaqueColor(135, 95, 95),
NewOpaqueColor(135, 95, 135),
NewOpaqueColor(135, 95, 175),
NewOpaqueColor(135, 95, 215),
NewOpaqueColor(135, 95, 255),
NewOpaqueColor(135, 135, 0),
NewOpaqueColor(135, 135, 95),
NewOpaqueColor(135, 135, 135),
NewOpaqueColor(135, 135, 175),
NewOpaqueColor(135, 135, 215),
NewOpaqueColor(135, 135, 255),
NewOpaqueColor(135, 175, 0),
NewOpaqueColor(135, 175, 95),
NewOpaqueColor(135, 175, 135),
NewOpaqueColor(135, 175, 175),
NewOpaqueColor(135, 175, 215),
NewOpaqueColor(135, 175, 255),
NewOpaqueColor(135, 215, 0),
NewOpaqueColor(135, 215, 95),
NewOpaqueColor(135, 215, 135),
NewOpaqueColor(135, 215, 175),
NewOpaqueColor(135, 215, 215),
NewOpaqueColor(135, 215, 255),
NewOpaqueColor(135, 255, 0),
NewOpaqueColor(135, 255, 95),
NewOpaqueColor(135, 255, 135),
NewOpaqueColor(135, 255, 175),
NewOpaqueColor(135, 255, 215),
NewOpaqueColor(135, 255, 255),
NewOpaqueColor(175, 0, 0),
NewOpaqueColor(175, 0, 95),
NewOpaqueColor(175, 0, 135),
NewOpaqueColor(175, 0, 175),
NewOpaqueColor(175, 0, 215),
NewOpaqueColor(175, 0, 255),
NewOpaqueColor(175, 95, 0),
NewOpaqueColor(175, 95, 95),
NewOpaqueColor(175, 95, 135),
NewOpaqueColor(175, 95, 175),
NewOpaqueColor(175, 95, 215),
NewOpaqueColor(175, 95, 255),
NewOpaqueColor(175, 135, 0),
NewOpaqueColor(175, 135, 95),
NewOpaqueColor(175, 135, 135),
NewOpaqueColor(175, 135, 175),
NewOpaqueColor(175, 135, 215),
NewOpaqueColor(175, 135, 255),
NewOpaqueColor(175, 175, 0),
NewOpaqueColor(175, 175, 95),
NewOpaqueColor(175, 175, 135),
NewOpaqueColor(175, 175, 175),
NewOpaqueColor(175, 175, 215),
NewOpaqueColor(175, 175, 255),
NewOpaqueColor(175, 215, 0),
NewOpaqueColor(175, 215, 95),
NewOpaqueColor(175, 215, 135),
NewOpaqueColor(175, 215, 175),
NewOpaqueColor(175, 215, 215),
NewOpaqueColor(175, 215, 255),
NewOpaqueColor(175, 255, 0),
NewOpaqueColor(175, 255, 95),
NewOpaqueColor(175, 255, 135),
NewOpaqueColor(175, 255, 175),
NewOpaqueColor(175, 255, 215),
NewOpaqueColor(175, 255, 255),
NewOpaqueColor(215, 0, 0),
NewOpaqueColor(215, 0, 95),
NewOpaqueColor(215, 0, 135),
NewOpaqueColor(215, 0, 175),
NewOpaqueColor(215, 0, 215),
NewOpaqueColor(215, 0, 255),
NewOpaqueColor(215, 95, 0),
NewOpaqueColor(215, 95, 95),
NewOpaqueColor(215, 95, 135),
NewOpaqueColor(215, 95, 175),
NewOpaqueColor(215, 95, 215),
NewOpaqueColor(215, 95, 255),
NewOpaqueColor(215, 135, 0),
NewOpaqueColor(215, 135, 95),
NewOpaqueColor(215, 135, 135),
NewOpaqueColor(215, 135, 175),
NewOpaqueColor(215, 135, 215),
NewOpaqueColor(215, 135, 255),
NewOpaqueColor(215, 175, 0),
NewOpaqueColor(215, 175, 95),
NewOpaqueColor(215, 175, 135),
NewOpaqueColor(215, 175, 175),
NewOpaqueColor(215, 175, 215),
NewOpaqueColor(215, 175, 255),
NewOpaqueColor(215, 215, 0),
NewOpaqueColor(215, 215, 95),
NewOpaqueColor(215, 215, 135),
NewOpaqueColor(215, 215, 175),
NewOpaqueColor(215, 215, 215),
NewOpaqueColor(215, 215, 255),
NewOpaqueColor(215, 255, 0),
NewOpaqueColor(215, 255, 95),
NewOpaqueColor(215, 255, 135),
NewOpaqueColor(215, 255, 175),
NewOpaqueColor(215, 255, 215),
NewOpaqueColor(215, 255, 255),
NewOpaqueColor(255, 0, 0),
NewOpaqueColor(255, 0, 95),
NewOpaqueColor(255, 0, 135),
NewOpaqueColor(255, 0, 175),
NewOpaqueColor(255, 0, 215),
NewOpaqueColor(255, 0, 255),
NewOpaqueColor(255, 95, 0),
NewOpaqueColor(255, 95, 95),
NewOpaqueColor(255, 95, 135),
NewOpaqueColor(255, 95, 175),
NewOpaqueColor(255, 95, 215),
NewOpaqueColor(255, 95, 255),
NewOpaqueColor(255, 135, 0),
NewOpaqueColor(255, 135, 95),
NewOpaqueColor(255, 135, 135),
NewOpaqueColor(255, 135, 175),
NewOpaqueColor(255, 135, 215),
NewOpaqueColor(255, 135, 255),
NewOpaqueColor(255, 175, 0),
NewOpaqueColor(255, 175, 95),
NewOpaqueColor(255, 175, 135),
NewOpaqueColor(255, 175, 175),
NewOpaqueColor(255, 175, 215),
NewOpaqueColor(255, 175, 255),
NewOpaqueColor(255, 215, 0),
NewOpaqueColor(255, 215, 95),
NewOpaqueColor(255, 215, 135),
NewOpaqueColor(255, 215, 175),
NewOpaqueColor(255, 215, 215),
NewOpaqueColor(255, 215, 255),
NewOpaqueColor(255, 255, 0),
NewOpaqueColor(255, 255, 95),
NewOpaqueColor(255, 255, 135),
NewOpaqueColor(255, 255, 175),
NewOpaqueColor(255, 255, 215),
NewOpaqueColor(255, 255, 255),
NewOpaqueColor(8, 8, 8),
NewOpaqueColor(18, 18, 18),
NewOpaqueColor(28, 28, 28),
NewOpaqueColor(38, 38, 38),
NewOpaqueColor(48, 48, 48),
NewOpaqueColor(58, 58, 58),
NewOpaqueColor(68, 68, 68),
NewOpaqueColor(78, 78, 78),
NewOpaqueColor(88, 88, 88),
NewOpaqueColor(98, 98, 98),
NewOpaqueColor(108, 108, 108),
NewOpaqueColor(118, 118, 118),
NewOpaqueColor(128, 128, 128),
NewOpaqueColor(138, 138, 138),
NewOpaqueColor(148, 148, 148),
NewOpaqueColor(158, 158, 158),
NewOpaqueColor(168, 168, 168),
NewOpaqueColor(178, 178, 178),
NewOpaqueColor(188, 188, 188),
NewOpaqueColor(198, 198, 198),
NewOpaqueColor(208, 208, 208),
NewOpaqueColor(218, 218, 218),
NewOpaqueColor(228, 228, 228),
NewOpaqueColor(238, 238, 238),
}
// Color both implements color.Color and image.Image.
// image.Image needs a color.Model, so for convenience's
// sake, Color also implements color.Model so it can
// simply have ColorModel() return itself.
// The main purpose of Color is so there is no need to
// instantiate an image.Unform everytime we need to
// draw something in a particular color.
type Color struct {
rgba color.RGBA
}
// NewOpaqueColor returns a Color that has a fully opaque alpha value.
func NewOpaqueColor(r, g, b uint8) Color {
return Color{color.RGBA{r, g, b, 255}}
}
// NewColor returns a new Color.
func NewColor(r, g, b, a uint8) Color {
return Color{color.RGBA{r, g, b, a}}
}
// RGBA implements color.Color
func (c Color) RGBA() (r, g, b, a uint32) {
return c.rgba.RGBA()
}
// At implements image.Image
func (c Color) At(int, int) color.Color {
return c.rgba
}
// Bounds implements image.Image
func (c Color) Bounds() image.Rectangle {
return image.Rectangle{image.Point{-1e9, -1e9}, image.Point{1e9, 1e9}}
}
// ColorModel implements image.Image
func (c Color) ColorModel() color.Model {
return c
}
// Convert (fake) implements color.Model.
func (c Color) Convert(c2 color.Color) color.Color {
return c2
}
// the tinygo.org/x/drivers/pixel package has a somewhat incompatible
// color interface with the color.Color interface. This type definition
// and it's associated function allows a pixel.Color's RGBA method to be
// cast so that it implements the color.Color interface.
// Example:
// pixelColor := pixel.NewColor[pixel.RGB888](127,127,127)
// drawImage.Set(xPos,yPos, Colorizer(pixelColor.RGBA))
type Colorizer func() color.RGBA
func (c Colorizer) RGBA() (r, g, b, a uint32) {
v := c()
return uint32(v.R), uint32(v.G), uint32(v.B), uint32(v.A)
}