protected virtual void InitializeGL()
{
m_uint_HWND = (uint)p.Handle.ToInt32();
m_uint_DC = WGL.GetDC(m_uint_HWND);
// Not doing the following WGL.wglSwapBuffers() on the DC will
// result in a failure to subsequently create the RC.
WGL.wglSwapBuffers(m_uint_DC);
WGL.PIXELFORMATDESCRIPTOR pfd = new WGL.PIXELFORMATDESCRIPTOR();
WGL.ZeroPixelDescriptor(ref pfd);
pfd.nVersion = 1;
pfd.dwFlags = (WGL.PFD_DRAW_TO_WINDOW | WGL.PFD_SUPPORT_OPENGL | WGL.PFD_DOUBLEBUFFER);
pfd.iPixelType = (byte)(WGL.PFD_TYPE_RGBA);
pfd.cColorBits = 32;
pfd.cDepthBits = 32;
pfd.iLayerType = (byte)(WGL.PFD_MAIN_PLANE);
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//for Stencil support
pfd.cStencilBits = 32;
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
int pixelFormatIndex = 0;
pixelFormatIndex = WGL.ChoosePixelFormat(m_uint_DC, ref pfd);
if (pixelFormatIndex == 0)
{
MessageBox.Show("Unable to retrieve pixel format");
return;
}
if (WGL.SetPixelFormat(m_uint_DC, pixelFormatIndex, ref pfd) == 0)
{
MessageBox.Show("Unable to set pixel format");
return;
}
//Create rendering context
m_uint_RC = WGL.wglCreateContext(m_uint_DC);
if (m_uint_RC == 0)
{
MessageBox.Show("Unable to get rendering context");
return;
}
if (WGL.wglMakeCurrent(m_uint_DC, m_uint_RC) == 0)
{
MessageBox.Show("Unable to make rendering context current");
return;
}
initRenderingGL();
}
/// <summary>
/// Event handler called when the form is loaded. It retrieves the controls
/// window handle and device context and creates the rendering context.
/// </summary>
protected virtual void InitializeGL(object sender, EventArgs e)
{
m_uint_HWND = (uint)this.Handle.ToInt32();
m_uint_DC = WGL.GetDC(m_uint_HWND);
// CAUTION: Not doing the following WGL.wglSwapBuffers() on the DC will
// result in a failure to subsequently create the RC.
WGL.wglSwapBuffers(m_uint_DC);
//Get the pixel format
WGL.PIXELFORMATDESCRIPTOR pfd = new WGL.PIXELFORMATDESCRIPTOR();
WGL.ZeroPixelDescriptor(ref pfd);
pfd.nVersion = 1;
pfd.dwFlags = (WGL.PFD_DRAW_TO_WINDOW | WGL.PFD_SUPPORT_OPENGL | WGL.PFD_DOUBLEBUFFER);
pfd.iPixelType = (byte)(WGL.PFD_TYPE_RGBA);
pfd.cColorBits = 32;
pfd.cDepthBits = 32;
pfd.iLayerType = (byte)(WGL.PFD_MAIN_PLANE);
int pixelFormatIndex = 0;
pixelFormatIndex = WGL.ChoosePixelFormat(m_uint_DC, ref pfd);
if (pixelFormatIndex == 0)
{
MessageBox.Show("Unable to retrieve pixel format");
return;
}
if (WGL.SetPixelFormat(m_uint_DC, pixelFormatIndex, ref pfd) == 0)
{
MessageBox.Show("Unable to set pixel format");
return;
}
//Create rendering context
m_uint_RC = WGL.wglCreateContext(m_uint_DC);
if (m_uint_RC == 0)
{
MessageBox.Show("Unable to get rendering context");
return;
}
if (WGL.wglMakeCurrent(m_uint_DC, m_uint_RC) == 0)
{
MessageBox.Show("Unable to make rendering context current");
return;
}
//Set up OpenGL related characteristics
ResizeGL(null, null);
GL.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
GL.glEnable(GL.GL_DEPTH_TEST);
GL.glDepthFunc(GL.GL_LEQUAL);
//GL.glEnable(GL.GL_CULL_FACE);
GL.glCullFace(GL.GL_BACK);
}
// ############################################################################
// ############################################################################
// ############################################################################
// ############################################################################
// ============================================================================
// The following can be used as an example of how to initialize OpenGL
// rendering. A System.Windows.Forms object can use a window handle acquired
// from (uint)((this.Handle).ToInt32()) as the "HWND" parameter.
//
// Here is a crude illustration of the use of WGL.DemoInitOpenGL() by a Form:
//
// // ----------------------------------------------------------------------
// public static uint m_uint_HWND = 0;
// public static uint m_uint_DC = 0;
// public static uint m_uint_RC = 0;
//
// protected override void OnPaintBackground( PaintEventArgs e )
// {
// // This overrides the System.Windows.Forms.Control protected method
// // "OnPaintBackground()" so that we don't clear the client area of
// // this form window -- so the OpenGL doesn't flicker on each frame.
// }
//
// protected override void OnPaint( System.Windows.Forms.PaintEventArgs e )
// {
// if (0 == m_uint_RC)
// {
// m_uint_HWND = (uint)((this.Handle).ToInt32());
// WGL.DemoInitOpenGL( m_uint_HWND, ref m_uint_DC, ref m_uint_RC );
// }
// if (0 != m_uint_RC)
// {
// WGL.DemoOpenGLDraw( this.Size.Width, this.Size.Height, m_uint_DC );
// }
// System.Threading.Thread.Sleep( 10 ); // 10 msec --> 100 frames per second, max.
// Invalidate(false); // Force OnPaint() to get called again.
// }
// // ----------------------------------------------------------------------
//
// ============================================================================
public static void DemoInitOpenGL
(
uint uint_HWND, // in
ref uint ref_uint_DC, // out
ref uint ref_uint_RC // out
)
{
ref_uint_DC = WGL.GetDC(uint_HWND);
// CAUTION: Not doing the following WGL.wglSwapBuffers() on the DC will
// result in a failure to subsequently create the RC.
WGL.wglSwapBuffers(ref_uint_DC);
WGL.DemoCreateRenderingContext(ref ref_uint_DC, ref ref_uint_RC);
if (0 == ref_uint_RC)
{
WGL.MessageBox(0, "Failed to create OpenGL Rendering Context (RC)",
"WGL.DemoInitOpenGL() : ERROR", MB_OK);
return;
}
}
