/// <summary>
/// Set pixel format by letting the driver choose the best pixel format following the criteria.
/// </summary>
/// <param name="pixelFormat">
///
/// </param>
private void SetDisplayablePixelFormat(DevicePixelFormat pixelFormat)
{
if (pixelFormat == null)
{
throw new ArgumentNullException("pixelFormat");
}
List <int> attribIList = new List <int>();
List <float> attribFList = new List <float>();
Wgl.PIXELFORMATDESCRIPTOR pDescriptor = new Wgl.PIXELFORMATDESCRIPTOR();
uint[] countFormatAttribsValues = new uint[1];
int[] choosenFormats = new int[4];
// Let choose pixel formats
if (!Wgl.ChoosePixelFormatARB(_DeviceContext, attribIList.ToArray(), attribFList.ToArray(), (uint)choosenFormats.Length, choosenFormats, countFormatAttribsValues))
{
Win32Exception innerException = new Win32Exception(Marshal.GetLastWin32Error());
throw new InvalidOperationException(String.Format("unable to choose pixel format: {0}", innerException.Message), innerException);
}
// Set choosen pixel format
if (Wgl.SetPixelFormat(_DeviceContext, choosenFormats[0], ref pDescriptor) == false)
{
Win32Exception innerException = new Win32Exception(Marshal.GetLastWin32Error());
throw new InvalidOperationException(String.Format("unable to set pixel format {0}: {1}", pixelFormat.FormatIndex, innerException.Message), innerException);
}
}
/// <summary>
/// Set the device pixel format.
/// </summary>
/// <param name="pixelFormat">
/// A <see cref="DevicePixelFormat"/> that specifies the pixel format to set.
/// </param>
private static int ChoosePixelFormat(IntPtr deviceContext, DevicePixelFormat pixelFormat)
{
if (pixelFormat == null)
{
throw new ArgumentNullException("pixelFormat");
}
List <int> attribIList = new List <int>();
List <float> attribFList = new List <float>();
uint[] countFormatAttribsValues = new uint[1];
int[] choosenFormats = new int[4];
attribIList.AddRange(new int[] { Wgl.SUPPORT_OPENGL_ARB, Gl.TRUE });
if (pixelFormat.RenderWindow)
{
attribIList.AddRange(new int[] { Wgl.DRAW_TO_WINDOW_ARB, Gl.TRUE });
}
if (pixelFormat.RenderPBuffer)
{
attribIList.AddRange(new int[] { Wgl.DRAW_TO_PBUFFER_ARB, Gl.TRUE });
}
if (pixelFormat.RgbaUnsigned)
{
attribIList.AddRange(new int[] { Wgl.PIXEL_TYPE_ARB, Wgl.TYPE_RGBA_ARB });
}
if (pixelFormat.RgbaFloat)
{
attribIList.AddRange(new int[] { Wgl.PIXEL_TYPE_ARB, Wgl.TYPE_RGBA_FLOAT_ARB });
}
if (pixelFormat.ColorBits > 0)
{
attribIList.AddRange(new int[] { Wgl.COLOR_BITS_ARB, pixelFormat.ColorBits });
}
if (pixelFormat.DepthBits > 0)
{
attribIList.AddRange(new int[] { Wgl.DEPTH_BITS_ARB, pixelFormat.DepthBits });
}
if (pixelFormat.StencilBits > 0)
{
attribIList.AddRange(new int[] { Wgl.STENCIL_BITS_ARB, pixelFormat.StencilBits });
}
if (pixelFormat.DoubleBuffer)
{
attribIList.AddRange(new int[] { Wgl.DOUBLE_BUFFER_ARB, pixelFormat.StencilBits });
}
attribIList.Add(0);
// Let choose pixel formats
if (!Wgl.ChoosePixelFormatARB(deviceContext, attribIList.ToArray(), attribFList.ToArray(), (uint)choosenFormats.Length, choosenFormats, countFormatAttribsValues))
{
throw new InvalidOperationException("unable to choose pixel format", GetPlatformExceptionCore());
}
return(choosenFormats[0]);
}