每一个opengl都被连接到一个着色描述表上。着色描述表将所有的opengl调用命令连

// 接到device context(设备描述表)上,将opengl的着色描述表定义为hrc ,要让程序能

// 够绘制窗口的话，还需要创建一个设备描述表，windows的设备描述表被定义为 hdc,

// dc将窗口连接到gdi(graphics device interface图形设备接口)。而rc-Each one opengl are connected to a shader descr iption table. Rendering Context all the opengl call the command with// receiving device context (device descr iptor table), on the opengl rendering Context is defined as the hrc, let the program can be// enough to draw a window, also need to create a device descr iption tables, windows of the device descr iption table is defined as hdc,// dc will be the window to connect to the gdi (graphics device interface graphics device interface). The rc