// Return the OpenGL texture as a golang `image.RGBA`
func (t *Texture) AsImage() *image.RGBA {
rgba := image.NewRGBA(image.Rect(0, 0, t.W, t.H))
With(t, func() {
// TODO: check internal format (with GetIntegerv?)
gl.GetTexImage(gl.TEXTURE_2D, 0, gl.RGBA, gl.UNSIGNED_BYTE, rgba.Pix)
})
return rgba
}
func (bank *TextureBank) UnitAsImage(index, level int) *image.RGBA {
geometry := bank.PixelData[index].Geometry[level]
rgba := image.NewRGBA(image.Rect(0, 0, geometry.Width, geometry.Height))
unit := bank.Units[index]
unit.Texture.Bind(unit.Target)
gl.GetTexImage(unit.Target, 0, gl.RGBA, gl.UNSIGNED_BYTE, rgba.Pix)
unit.Texture.Unbind(unit.Target)
return rgba
}