public static ContextHandle CreateContextCurrent(IntPtr hwnd)
{
var context = ContextHandle.Zero;
var hdc = Win32Helper.GetDC(hwnd);//取得设备上下文
PixelFormatDescriptor pfd;
pfd.Size = 40;
pfd.Version = 1;
pfd.Flags = PixelFormatDescriptorFlags.DRAW_TO_WINDOW | PixelFormatDescriptorFlags.SUPPORT_OPENGL | PixelFormatDescriptorFlags.DOUBLEBUFFER;
pfd.PixelType = PixelType.RGBA;
pfd.ColorBits = 32;
pfd.DepthBits = 16;
pfd.StencilBits = 8;
int pixelFormat;
unsafe
{
PixelFormatDescriptor *ppfd = &pfd;
pixelFormat = Win32Helper.ChoosePixelFormat(hdc, (IntPtr)ppfd); //选择像素格式
Win32Helper.SetPixelFormat(hdc, pixelFormat, (IntPtr)ppfd); //设置像素格式
context = new ContextHandle(hdc, Win32Helper.CreateContext(hdc)); //建立OpenGL渲染上下文
MakeCurrentContext(context); //激活当前渲染上下文
_contexts[context.HDC] = context;
}
return(context);
}
