| private SetPixelFormat ( uint hdc, int iPixelFormat, PIXELFORMATDESCRIPTOR p_pfd ) : int | ||
| hdc | uint | |
| iPixelFormat | int | |
| p_pfd | PIXELFORMATDESCRIPTOR | |
| return | int | |
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);
}
// DWORD GetLastError(VOID);
// ############################################################################
// ############################################################################
// ############################################################################
// ############################################################################
// ============================================================================
// The following function, DemoCreateRenderingContext(ref_uint_DC,ref_uint_RC),
// can be used as a simple way to create an OpenGL "Rendering Context" (RC).
// **** DO NOT CALL DemoCreateRenderingContext() DIRECTLY IF YOU CHOOSE TO
// CALL DemoInitOpenGL() (below) TO ESTABLISH OPENGL. ****
// ============================================================================
public static unsafe void DemoCreateRenderingContext
(
ref uint ref_uint_DC,
ref uint ref_uint_RC
)
{
ref_uint_RC = 0;
PIXELFORMATDESCRIPTOR pfd = new PIXELFORMATDESCRIPTOR();
// --------------------------------------------------------------------------
pfd.nSize = 40; // sizeof(PIXELFORMATDESCRIPTOR);
pfd.nVersion = 1;
pfd.dwFlags = (PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER);
pfd.iPixelType = (byte)(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 = 32;
pfd.cStencilBits = 0;
pfd.cAuxBuffers = 0;
pfd.iLayerType = (byte)(PFD_MAIN_PLANE);
pfd.bReserved = 0;
pfd.dwLayerMask = 0;
pfd.dwVisibleMask = 0;
pfd.dwDamageMask = 0;
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// Choose Pixel Format
// --------------------------------------------------------------------------
int iPixelFormat = 0;
PIXELFORMATDESCRIPTOR *_pfd = &pfd;
iPixelFormat = WGL.ChoosePixelFormat(ref_uint_DC, _pfd);
if (0 == iPixelFormat)
{
uint uint_LastError = WGL.GetLastError();
string string_Message = "ChoosePixelFormat() FAILED: Error: " + uint_LastError;
WGL.MessageBox(0, string_Message, "WGL.DemoGetRenderingContext() : ERROR", MB_OK);
return;
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// Set Pixel Format
// --------------------------------------------------------------------------
int int_Result_SPF = 0;
int_Result_SPF = WGL.SetPixelFormat(ref_uint_DC, iPixelFormat, _pfd);
if (0 == int_Result_SPF)
{
uint uint_LastError = WGL.GetLastError();
string string_Message = "SetPixelFormat() FAILED. Error: " + uint_LastError;
WGL.MessageBox(0, string_Message, "WGL.DemoGetRenderingContext() : ERROR", MB_OK);
return;
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// Create Rendering Context (RC)
// NOTE: You will get the following error:
// 126 : ERROR_MOD_NOT_FOUND
// if you attempt to create a render context too soon after creating a
// window and getting its Device Context (DC).
// See the comments for WGL.DemoInitOpenGL() on how to use a call to
// WGL.wglSwapBuffers( ref_uint_DC ) before attempting to create the RC.
// --------------------------------------------------------------------------
ref_uint_RC = WGL.wglCreateContext(ref_uint_DC);
if (0 == ref_uint_RC)
{
uint uint_LastError = WGL.GetLastError();
string string_Message = "wglCreateContext() FAILED. Error: " + uint_LastError;
WGL.MessageBox(0, string_Message, "WGL.DemoGetRenderingContext() : ERROR", MB_OK);
return;
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// Make the new Render Context (RC) the current Render Context (RC)
// --------------------------------------------------------------------------
int int_Result_MC = 0;
int_Result_MC = WGL.wglMakeCurrent(ref_uint_DC, ref_uint_RC);
if (0 == int_Result_MC)
{
uint uint_LastError = WGL.GetLastError();
string string_Message = "wglMakeCurrent() FAILED. Error: " + uint_LastError;
WGL.MessageBox(0, string_Message, "WGL.DemoGetRenderingContext() : ERROR", MB_OK);
// ***************************
WGL.wglDeleteContext(ref_uint_RC);
ref_uint_RC = 0;
// ***************************
return;
}
// --------------------------------------------------------------------------
}