[image](image/image.md) [color](image/color.md) [png](image/png.md) [draw 图像合成函数](image/draw%E5%9B%BE%E5%83%8F%E5%90%88%E6%88%90%E5%87%BD%E6%95%B0.md) [gif](image/gif.md) [jpeg](image/jpeg.md)