func pixel_is_light(img *image.Paletted, x int, y int) bool {
r, g, b, _ := img.At(x, y).RGBA()
sum := r + g + b
return (sum > 0x18000) && (sum < 0x2e000)
}
func debarf_frame(frame *image.Paletted) error {
xmin := frame.Rect.Min.X
ymin := frame.Rect.Min.Y
xmax := frame.Rect.Max.X
ymax := frame.Rect.Max.Y
for y := ymin; y < ymax; y++ {
for x := xmin; x < xmax; x++ {
c := frame.At(x, y)
r, g, b, a := c.RGBA()
if pixel_is_transparent(frame, x, y) {
fmt.Printf("...")
frame.Set(x, y, color.RGBA64{uint16(r), uint16(g), uint16(b), 0xffff})
} else if should_turn_pixel_transparent(frame, x, y) {
fmt.Printf("xxx")
frame.Set(x, y, color.RGBA64{0, 0, 0, 0xffff})
} else {
r /= 0x1000
g /= 0x1000
b /= 0x1000
if a != 0xffff {
fmt.Printf("barf")
}
fmt.Printf("%x%x%x", r, g, b)
}
}
fmt.Printf("\n")
}
return nil
}
func pixel_is_transparent(img *image.Paletted, x int, y int) bool {
_, _, _, a := img.At(x, y).RGBA()
return a == 0
}