Example #1
0
func (e *Element) At(x, y int) color.Color {
	offset := gfx.GetPixelOffset(x, y, e.Width)

	return color.RGBA{
		R: e.Buffer[offset+I_R],
		G: e.Buffer[offset+I_G],
		B: e.Buffer[offset+I_B],
		A: e.Buffer[offset+I_A],
	}
}
Example #2
0
func (fb *Framebuffer) At(x, y int) color.Color {
	offset := gfx.GetPixelOffset(x, y, int(fb.Vinfo.Xres))

	return color.RGBA{
		R: fb.MemOffscreen[offset+I_R],
		G: fb.MemOffscreen[offset+I_G],
		B: fb.MemOffscreen[offset+I_B],
		A: fb.MemOffscreen[offset+I_A],
	}
}
Example #3
0
func (e *Element) Set(x, y int, c color.Color) {
	offset := gfx.GetPixelOffset(x, y, e.Width)
	r, g, b, a := c.RGBA()

	// since image.Draw works with RGBA64 internally we need to convert the color value to RGBA before writing
	// to the framebuffer - hence the div 256
	e.Buffer[offset+I_R] = uint8(r / 256)
	e.Buffer[offset+I_G] = uint8(g / 256)
	e.Buffer[offset+I_B] = uint8(b / 256)
	e.Buffer[offset+I_A] = uint8(a / 256)
}
Example #4
0
func (fb *Framebuffer) Set(x, y int, c color.Color) {
	offset := gfx.GetPixelOffset(x, y, int(fb.Vinfo.Xres))
	r, g, b, a := c.RGBA()

	// since image.Draw works with RGBA64 internally we need to convert the color value to RGBA before writing
	// to the framebuffer - hence the div 256
	fb.MemOffscreen[offset+I_R] = uint8(r / 256)
	fb.MemOffscreen[offset+I_G] = uint8(g / 256)
	fb.MemOffscreen[offset+I_B] = uint8(b / 256)
	fb.MemOffscreen[offset+I_A] = uint8(a / 256)
}