private GraphicsMode DescribePixelFormatARB(IntPtr device, int pixelformat)
{
GraphicsMode created_mode = null;
// See http://www.opengl.org/registry/specs/ARB/wgl_pixel_format.txt for more details
if (Wgl.SupportsFunction("wglGetPixelFormatAttribivARB"))
{
// Define the list of attributes we are interested in.
// The results will be stored in the 'values' array below.
int[] attribs = new int[]
{
(int)WGL_ARB_pixel_format.AccelerationArb,
(int)WGL_ARB_pixel_format.RedBitsArb,
(int)WGL_ARB_pixel_format.GreenBitsArb,
(int)WGL_ARB_pixel_format.BlueBitsArb,
(int)WGL_ARB_pixel_format.AlphaBitsArb,
(int)WGL_ARB_pixel_format.ColorBitsArb,
(int)WGL_ARB_pixel_format.DepthBitsArb,
(int)WGL_ARB_pixel_format.StencilBitsArb,
(int)WGL_ARB_multisample.SampleBuffersArb,
(int)WGL_ARB_multisample.SamplesArb,
(int)WGL_ARB_pixel_format.AccumRedBitsArb,
(int)WGL_ARB_pixel_format.AccumGreenBitsArb,
(int)WGL_ARB_pixel_format.AccumBlueBitsArb,
(int)WGL_ARB_pixel_format.AccumAlphaBitsArb,
(int)WGL_ARB_pixel_format.AccumBitsArb,
(int)WGL_ARB_pixel_format.DoubleBufferArb,
(int)WGL_ARB_pixel_format.StereoArb,
0
};
// Allocate storage for the results of GetPixelFormatAttrib queries
int[] values = new int[attribs.Length];
// Get the format attributes for this pixel format
if (!Wgl.WglGetPixelFormatAttribivARB(device, pixelformat, 0, (uint)attribs.Length - 1, attribs, values))
{
Debug.Print("[Warning] Failed to detect attributes for PixelFormat: {0}.", pixelformat);
}
// Skip formats that don't offer full hardware acceleration
WGL_ARB_pixel_format acceleration = (WGL_ARB_pixel_format)values[0];
if (acceleration == WGL_ARB_pixel_format.FullAccelerationArb)
{
// Construct a new GraphicsMode to describe this format
created_mode = new GraphicsMode(new IntPtr(pixelformat),
new ColorFormat(values[1], values[2], values[3], values[4]),
values[6],
values[7],
values[8] != 0 ? values[9] : 0,
new ColorFormat(values[10], values[11], values[12], values[13]),
values[15] == 1 ? 2 : 1,
values[16] == 1 ? true : false);
}
}
return(created_mode);
}
