1. surface 和 pitch
图片发自简书App
2. bilt
图片发自简书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在内存中非线性存储的就叫tiled
X中：
1. solid
Solid就是用RGBA填充一个区域，就是solid fill。
2. composite
composite就像渲染，最终组合窗口，与Android中的含义差不多吧。
