func (c attrColor) RGBA() (r, g, b, a uint32) {
switch termbox.Attribute(c) {
case termbox.ColorBlack:
return 0, 0, 0, math.MaxUint16
case termbox.ColorRed:
return math.MaxUint16, 0, 0, math.MaxUint16
case termbox.ColorGreen:
return 0, math.MaxUint16, 0, math.MaxUint16
case termbox.ColorYellow:
return math.MaxUint16, math.MaxUint16, 0, math.MaxUint16
case termbox.ColorBlue:
return 0, 0, math.MaxUint16, math.MaxUint16
case termbox.ColorMagenta:
return math.MaxUint16, 0, math.MaxUint16, math.MaxUint16
case termbox.ColorCyan:
return 0, math.MaxUint16, math.MaxUint16, math.MaxUint16
case termbox.ColorWhite:
return math.MaxUint16, math.MaxUint16, math.MaxUint16, math.MaxUint16
}
switch {
case c >= 16 && c <= 231:
c -= 16
rgba := color.RGBA{R: base[(c/36)%6], G: base[(c/6)%6], B: base[c%6], A: 0xff}
return rgba.RGBA()
case c >= 232 && c <= 255:
x := uint8(0x08 + 0xa*(c-232))
rgba := color.RGBA{R: x, G: x, B: x, A: 0xff}
return rgba.RGBA()
}
panic("not found")
}
func draw(img image.Image) {
w, h := termbox.Size()
iw, ih := img.Bounds().Max.X, img.Bounds().Max.Y
sw, sh := fit(w, h, iw*2, ih)
termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
for y := 0; y < h; y++ {
for x := 0; x < w; x++ {
if x >= sw || y >= sh {
termbox.SetCell(x, y, ' ', termbox.ColorDefault, termbox.ColorDefault)
continue
}
xi := x * img.Bounds().Max.X / sw
yi := y * img.Bounds().Max.Y / sh
a := palette.Convert(img.At(xi, yi))
if at, ok := a.(attrColor); ok {
termbox.SetCell(x, y, ' ', termbox.ColorDefault,
termbox.Attribute(at))
}
}
}
termbox.Flush()
}
func toTmAttr(x Attribute) tm.Attribute {
return tm.Attribute(x)
}
func (tb termboxImpl) SetCell(x, y int, c rune, fg, bg uint16) {
termbox.SetCell(x, y, c, termbox.Attribute(fg), termbox.Attribute(bg))
}