private static void GLInit(IntPtr hwnd, out IntPtr hdc, out IntPtr hglrc)
{
gdi.PIXELFORMATDESCRIPTOR pfd = new gdi.PIXELFORMATDESCRIPTOR();
pfd.nSize = (ushort)Marshal.SizeOf(pfd);
pfd.nVersion = 1;
pfd.dwFlags = gdi.PFD_DRAW_TO_WINDOW | gdi.PFD_SUPPORT_OPENGL | gdi.PFD_DOUBLEBUFFER;
pfd.iPixelType = gdi.PFD_TYPE_RGBA;
pfd.cColorBits = 32;
pfd.cRedBits = 0;
pfd.cRedShift = 0;
pfd.cGreenBits = 0;
pfd.cGreenShift = 0;
pfd.cBlueBits = 0;
pfd.cBlueShift = 0;
pfd.cAlphaBits = 0;
pfd.cAlphaShift = 0;
pfd.cAccumBits = 0;
pfd.cAccumRedBits = 0;
pfd.cAccumGreenBits = 0;
pfd.cAccumBlueBits = 0;
pfd.cAccumAlphaBits = 0;
pfd.cDepthBits = 24;
pfd.cStencilBits = 8;
pfd.cAuxBuffers = 0;
pfd.iLayerType = 0;
pfd.bReserved = 0;
pfd.dwLayerMask = 0;
pfd.dwVisibleMask = 0;
pfd.dwDamageMask = 0;
hdc = gdi.GetDC(hwnd);
if (hdc == IntPtr.Zero)
{
throw new Exception("ThreadGLSurface error: Failed to get device context.");
}
int iPixelFormat = gdi.ChoosePixelFormat(hdc, out pfd);
if (!gdi.SetPixelFormat(hdc, iPixelFormat, out pfd))
{
throw new Exception("ThreadGLSurface error: Failed to set pixel format.");
}
hglrc = wgl.CreateContext(hdc);
if (hglrc == IntPtr.Zero)
{
throw new Exception("ThreadGLSurface error: Failed to create OpenGL device context.");
}
if (!wgl.MakeCurrent(hdc, hglrc))
{
throw new Exception("ThreadGLSurface error: Failed to make device context current.");
}
}
protected override void OnHandleCreated(EventArgs e)
{
base.OnHandleCreated(e);
gdi.PIXELFORMATDESCRIPTOR pfd = new gdi.PIXELFORMATDESCRIPTOR();
pfd.nSize = (ushort)Marshal.SizeOf(pfd);
pfd.nVersion = 1;
pfd.dwFlags = gdi.PFD_DRAW_TO_WINDOW | gdi.PFD_SUPPORT_OPENGL | gdi.PFD_DOUBLEBUFFER;
pfd.iPixelType = gdi.PFD_TYPE_RGBA;
pfd.cColorBits = 32;
pfd.cRedBits = 0;
pfd.cRedShift = 0;
pfd.cGreenBits = 0;
pfd.cGreenShift = 0;
pfd.cBlueBits = 0;
pfd.cBlueShift = 0;
pfd.cAlphaBits = 0;
pfd.cAlphaShift = 0;
pfd.cAccumBits = 0;
pfd.cAccumRedBits = 0;
pfd.cAccumGreenBits = 0;
pfd.cAccumBlueBits = 0;
pfd.cAccumAlphaBits = 0;
pfd.cDepthBits = 24;
pfd.cStencilBits = 8;
pfd.cAuxBuffers = 0;
pfd.iLayerType = 0;
pfd.bReserved = 0;
pfd.dwLayerMask = 0;
pfd.dwVisibleMask = 0;
pfd.dwDamageMask = 0;
HDC = gdi.GetDC(Handle);
if (HDC == IntPtr.Zero)
{
throw new Exception("OpenGLSurface error: Failed to get device context.");
}
int iPixelFormat = gdi.ChoosePixelFormat(HDC, out pfd);
if (!gdi.SetPixelFormat(HDC, iPixelFormat, out pfd))
{
throw new Exception("OpenGLSurface error: Failed to set pixel format.");
}
HGLRC = wgl.CreateContext(HDC);
if (HGLRC == IntPtr.Zero)
{
throw new Exception("OpenGLSurface error: Failed to create OpenGL device context.");
}
if (!MakeCurrent())
{
throw new Exception("OpenGLSurface error: Failed to make device context current.");
}
gl.Enable(GL.BLEND);
gl.BlendFunc(GL.SRC_ALPHA, GL.ONE_MINUS_SRC_ALPHA);
gl.DepthMask(GL.FALSE);
gl.MatrixMode(GL.PROJECTION);
gl.LoadIdentity();
gl.Ortho(-SurfaceSize.Width / 2f, SurfaceSize.Width / 2f,
-SurfaceSize.Height / 2f, SurfaceSize.Height / 2f, 0f, 1f);
GLStart?.Invoke(this, EventArgs.Empty);
}