1. surface 和 pitch
圖片發自簡書App
2. bilt
圖片發自簡書App
3. tiled
Notice that surfaces are not always stored linearly in video memory, in fact for performance reasons it is extremely common that they are not, as this improves the locality of the memory accesses when rendering. Such surfaces are called tiled.
surfaces在內存中非線性存儲的就叫tiled
X中：
1. solid
Solid就是用RGBA填充一個區域，就是solid fill。
2. composite
composite就像渲染，最終組合窗口，與Android中的含義差不多吧。
