http://tkengo.github.io/blog/2014/12/27/opengl-es-2-2d-knowledge-1/
Data prepare
- Vertex Coordinate
- Vertex Index
- Texture ID
- Texture UV Coordinate
- Transform matrix
GPU Process
- Vertex Shader
- World Coordinate Transform
- View Corrdinate Transform
- Projection Transform
- Viewport Transform
- Rasterize
- Fragment Shader
- Textrue Explore
- Depth test
- Blending
- Draw in Frame buffer
