Example #1
0
// colorToFloat32 returns the float32 representation of the given color
func colorToFloat32(c color.Color) float32 {
	colorR, colorG, colorB, colorA := c.RGBA()
	colorR >>= 8
	colorG >>= 8
	colorB >>= 8
	colorA >>= 8

	red := colorR
	green := colorG << 8
	blue := colorB << 16
	alpha := colorA << 24

	return math.Float32frombits((alpha | blue | green | red) & 0xfeffffff)
}
Example #2
0
func (s *basicShader) generateBufferContent(ren *RenderComponent, buffer []float32) bool {
	w := ren.Drawable.Width()
	h := ren.Drawable.Height()

	colorR, colorG, colorB, colorA := ren.Color.RGBA()
	colorR >>= 8
	colorG >>= 8
	colorB >>= 8
	colorA >>= 8

	red := colorR
	green := colorG << 8
	blue := colorB << 16
	alpha := colorA << 24

	tint := math.Float32frombits((alpha | blue | green | red) & 0xfeffffff)

	u, v, u2, v2 := ren.Drawable.View()

	var changed bool

	//setBufferValue(buffer, 0, 0, &changed)
	//setBufferValue(buffer, 1, 0, &changed)
	setBufferValue(buffer, 2, u, &changed)
	setBufferValue(buffer, 3, v, &changed)
	setBufferValue(buffer, 4, tint, &changed)

	setBufferValue(buffer, 5, w, &changed)
	//setBufferValue(buffer, 6, 0, &changed)
	setBufferValue(buffer, 7, u2, &changed)
	setBufferValue(buffer, 8, v, &changed)
	setBufferValue(buffer, 9, tint, &changed)

	setBufferValue(buffer, 10, w, &changed)
	setBufferValue(buffer, 11, h, &changed)
	setBufferValue(buffer, 12, u2, &changed)
	setBufferValue(buffer, 13, v2, &changed)
	setBufferValue(buffer, 14, tint, &changed)

	//setBufferValue(buffer, 15, 0, &changed)
	setBufferValue(buffer, 16, h, &changed)
	setBufferValue(buffer, 17, u, &changed)
	setBufferValue(buffer, 18, v2, &changed)
	setBufferValue(buffer, 19, tint, &changed)

	return changed
}