func (dev *openGLGraphicsDevice) SetTexture2D(texture Texture2D, unit uint) {
gltexture := texture.(*openGLTexture2D)
gl.ActiveTexture(gl.TEXTURE0 + gl.GLenum(unit))
if gltexture != nil {
gltexture.tex.Bind(gl.TEXTURE_2D)
} else {
gl.Texture(0).Bind(gl.TEXTURE_2D)
}
}
func loadSurface(img image.Image) gl.Texture {
w := img.Bounds().Dx()
h := img.Bounds().Dy()
rgba := image.NewRGBA(w, h)
for x := 0; x < w; x++ {
for y := 0; y < h; y++ {
rgba.Set(x, y, img.At(x, y))
}
}
gl.ActiveTexture(gl.TEXTURE0)
texture := gl.GenTexture()
texture.Bind(gl.TEXTURE_2D)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, rgba.Rect.Dx(), rgba.Rect.Dy(), 0, gl.RGBA, gl.UNSIGNED_BYTE, rgba.Pix)
texture.Unbind(gl.TEXTURE_2D)
return texture
}