各大gpu压缩纹理对比 https://software.intel.com/en-us/android/articles/android-texture-comPRession http://imgtec.eetrend.com/blog/2213 http://gad.QQ.com/article/detail/6503

重要的点

判断是否支持PVRTC格式的压缩纹理 return (extensions.find(“GL_IMG_texture_compression_pvrtc”)!= string::npos);