how to detect if openGL/card supports non power of 2?

Question

检测图形卡和编译的openGL二进制文件是否支持在运行时不是2的幂的纹理的最佳方法是什么？

Answer 1

You can check with glGet for ARB_texture_non_power_of_two or use GLEW.

Edit to reflect the comments: As of OpenGL 2.0 this feature is required and ARB_texture_non_power_of_two need not be defined. How to find the current version is described here . As Jerry points out: Depending on the GPU the feature might be implemented in software and the performance wont be great if you use textures with a non-power-of-two size.