OpenGL程序使用独显运行的方法

// http://developer.download.nvidia.com/devzone/devcenter/gamegraphics/files/OptimusRenderingPolicies.pdf
// The following line is to favor the high performance NVIDIA GPU if there are multiple GPUs
// Has to be .exe module to be correctly detected.
// N卡使用独显运行
extern "C" __declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;

// And the AMD equivalent
// Also has to be .exe module to be correctly detected.
// A显卡使用独显运行
extern "C" __declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 0x00000001;