// Fills the backbuffer with a particular color. Color is 0xAARRGGBB
func (bb *Backbuffer) Fill(color uint32) {
r, g, b, a := utils.ColorToRGBABytes(color)
for i := 0; i < len(bb.pixels); i += bb.bytesPerPixel {
bb.pixels[i] = b
bb.pixels[i+1] = g
bb.pixels[i+2] = r
bb.pixels[i+3] = a
}
}
// Draws a pixel at given coordinates, color is 0xAARRGGBB
func (bb *Backbuffer) DrawPixel(x, y int, color uint32) error {
pos := ((y * bb.width) + x) * bb.bytesPerPixel
// Stop unsafe operations
if pos < 0 {
return errors.New("Position cannot be negative")
}
if pos+3 >= len(bb.pixels)-1 {
return errors.New("Pixel exceeds backbuffer, cannot set")
}
r, g, b, a := utils.ColorToRGBABytes(color)
// Blue, Green, Red, Alpha
bb.pixels[pos] = b
bb.pixels[pos+1] = g
bb.pixels[pos+2] = r
bb.pixels[pos+3] = a
return nil
}
