step3

Draw step0 :清除画布

step 4 启用顶点坐标和纹理坐标进行绘制。 <p> 主要就是激活和使用定义的varying和uniform 变量

step2

step1

A multiplier for the blur size, ranging from 0.0 on up, with a default of 1.0 @param blurSize from 0.0 on up, default 1.0

设置Camera展示的方向，如果不设置就会导致前摄像方向不对 @param activity @param cameraId @param camera

设置Uniform变量 @param matrix @param curTime

Updates the float buffer with the specified vertex data, assuming that the vertex data and the float buffer are the same size.

更新floatBuffer数据 @param vertexData @param start @param count

Updates the float buffer with the specified vertex data, assuming that the vertex data and the float buffer are the same size.

Updates the float buffer with the specified vertex data, assuming that the vertex data and the float buffer are the same size.

Validates an OpenGL program. Should only be called when developing the application.

Validates an OpenGL program. Should only be called when developing the application.

Validates an OpenGL program. Should only be called when developing the application.

Check that all given permissions have been granted by verifying that each entry in the given array is of the value {@link PackageManager#PERMISSION_GR