private static void InitFunctions()
{
if (glGenBuffersARB == null)
{
glGenBuffersARB = (glGenBuffersARBHandler)WGL.GetProc <glGenBuffersARBHandler>("glGenBuffersARB");
}
if (glBufferDataARB == null)
{
glBufferDataARB = (glBufferDataARBHandler)WGL.GetProc <glBufferDataARBHandler>("glBufferDataARB");
}
if (glDeleteBuffersARB == null)
{
glDeleteBuffersARB = (glDeleteBuffersARBHandler)WGL.GetProc <glDeleteBuffersARBHandler>("glDeleteBuffersARB");
}
if (glBindBufferARB == null)
{
glBindBufferARB = (glBindBufferARBHandler)WGL.GetProc <glBindBufferARBHandler>("glBindBufferARB");
}
if (glMapBufferARB == null)
{
glMapBufferARB = (glMapBufferARBHandler)WGL.GetProc <glMapBufferARBHandler>("glMapBufferARB");
}
if (glUnmapBufferARB == null)
{
glUnmapBufferARB = (glUnmapBufferARBHandler)WGL.GetProc <glUnmapBufferARBHandler>("glUnmapBufferARB");
}
if (glBufferSubDataARB == null)
{
glBufferSubDataARB = (glBufferSubDataARBHandler)WGL.GetProc <glBufferSubDataARBHandler>("glBufferSubDataARB");
}
}
static private int GetAAPixelFormat(ref int samples)
{
PIXELFORMATDESCRIPTOR pfd = new PIXELFORMATDESCRIPTOR();
pfd.nSize = (ushort)Marshal.SizeOf(typeof(PIXELFORMATDESCRIPTOR));
pfd.nVersion = 1;
pfd.dwFlags = PixelFlag.PFD_DRAW_TO_WINDOW | PixelFlag.PFD_SUPPORT_OPENGL | PixelFlag.PFD_DOUBLEBUFFER;
pfd.iPixelType = PixelType.PFD_TYPE_RGBA;
pfd.cColorBits = 32;
IntPtr dummyHWnd = GDI.CreateWindowEx(0, s_dummyClass, "", GDI.WindowStyles.WS_OVERLAPPEDWINDOW, 0, 0, 0, 0, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
IntPtr dummyHDc = GDI.GetDC(dummyHWnd);
int dummyPF = GDI.ChoosePixelFormat(dummyHDc, ref pfd);
GDI.SetPixelFormat(dummyHDc, dummyPF, ref pfd);
IntPtr dummyHRc = WGL.wglCreateContext(dummyHDc);
WGL.wglMakeCurrent(dummyHDc, dummyHRc);
int[] iattrs = new int[] {
WGL.WGL_DRAW_TO_WINDOW_ARB, 1,
WGL.WGL_ACCELERATION_ARB, WGL.WGL_FULL_ACCELERATION_ARB,
WGL.WGL_COLOR_BITS_ARB, 24,
WGL.WGL_ALPHA_BITS_ARB, 8,
WGL.WGL_DEPTH_BITS_ARB, 24,
WGL.WGL_STENCIL_BITS_ARB, 8,
WGL.WGL_DOUBLE_BUFFER_ARB, 1,
WGL.WGL_SAMPLE_BUFFERS_ARB, 1,
WGL.WGL_SAMPLES_ARB, 0,
0, 0
};
WGL.wglChoosePixelFormatARBHandler wglChoosePixelFormatARB = (WGL.wglChoosePixelFormatARBHandler)WGL.GetProc <WGL.wglChoosePixelFormatARBHandler>("wglChoosePixelFormatARB");
int pixelFormat = 0;
if (wglChoosePixelFormatARB != null)
{
int reqSamples;
for (reqSamples = samples; reqSamples > 0; reqSamples /= 2)
{
iattrs[17] = reqSamples;
int[] pixelFormats = new int[16];
int numFormats;
unsafe
{
fixed(int *pPixelFormats = pixelFormats)
{
fixed(int *pIAttrs = iattrs)
{
int success = wglChoosePixelFormatARB(
dummyHDc,
pIAttrs, (float *)0, 16,
pPixelFormats, &numFormats);
if (success != 0 && numFormats > 0)
{
pixelFormat = pixelFormats[0];
samples = reqSamples;
break;
}
}
}
}
}
}
else
{
samples = 1;
pixelFormat = GDI.ChoosePixelFormat(dummyHDc, ref pfd);
}
WGL.wglMakeCurrent(dummyHDc, dummyHRc);
WGL.wglDeleteContext(dummyHRc);
GDI.ReleaseDC(dummyHWnd, dummyHDc);
GDI.DestroyWindow(dummyHWnd);
return(pixelFormat);
}