void fgNewWGLCreateContext( SFG_Window* window )
{
HGLRC context;
int attributes[9];
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
/* If nothing fancy has been required, leave the context as it is */
if ( fghIsLegacyContextRequested() )
{
return;
}
wglMakeCurrent( window->Window.pContext.Device, window->Window.Context );
if ( !fghIsExtensionSupported( window->Window.pContext.Device, "WGL_ARB_create_context" ) )
{
/* wglCreateContextAttribsARB not found, yet the user has requested the new context creation */
fgWarning( "OpenGL >2.1 context requested but wglCreateContextAttribsARB is not available! Falling back to legacy context creation" );
/* Legacy context already created at this point in WM_CREATE path of fgPlatformWindowProc, just return */
return;
}
/* new context creation */
fghFillContextAttributes( attributes );
wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) wglGetProcAddress( "wglCreateContextAttribsARB" );
if ( wglCreateContextAttribsARB == NULL )
{
/* wglCreateContextAttribsARB not found, yet the user has requested the new context creation */
fgWarning( "OpenGL >2.1 context requested but wglCreateContextAttribsARB is not available! Falling back to legacy context creation" );
/* Legacy context already created at this point in WM_CREATE path of fgPlatformWindowProc, just return */
return;
}
context = wglCreateContextAttribsARB( window->Window.pContext.Device, 0, attributes );
if ( context == NULL )
{
fghContextCreationError();
}
wglMakeCurrent( NULL, NULL );
wglDeleteContext( window->Window.Context );
window->Window.Context = context;
}
void fgNewWGLCreateContext( SFG_Window* window )
{
HGLRC context;
int attributes[9];
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
/* If nothing fancy has been required, leave the context as it is */
if ( fghIsLegacyContextRequested() )
{
return;
}
wglMakeCurrent( window->Window.pContext.Device, window->Window.Context );
if ( !fghIsExtensionSupported( window->Window.pContext.Device, "WGL_ARB_create_context" ) )
{
return;
}
/* new context creation */
fghFillContextAttributes( attributes );
wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) wglGetProcAddress( "wglCreateContextAttribsARB" );
if ( wglCreateContextAttribsARB == NULL )
{
fgError( "wglCreateContextAttribsARB not found" );
}
context = wglCreateContextAttribsARB( window->Window.pContext.Device, 0, attributes );
if ( context == NULL )
{
fghContextCreationError();
}
wglMakeCurrent( NULL, NULL );
wglDeleteContext( window->Window.Context );
window->Window.Context = context;
}
GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
unsigned char layer_type )
{
#if defined(_WIN32_WCE)
return GL_TRUE;
#else
PIXELFORMATDESCRIPTOR pfd;
PIXELFORMATDESCRIPTOR* ppfd = &pfd;
int pixelformat;
HDC current_hDC;
GLboolean success;
if (checkOnly)
current_hDC = CreateDC(TEXT("DISPLAY"), NULL ,NULL ,NULL);
else
current_hDC = window->Window.pContext.Device;
fghFillPFD( ppfd, current_hDC, layer_type );
pixelformat = ChoosePixelFormat( current_hDC, ppfd );
/* windows hack for multismapling/sRGB */
if ( ( fgState.DisplayMode & GLUT_MULTISAMPLE ) ||
( fgState.DisplayMode & GLUT_SRGB ) )
{
HGLRC rc, rc_before=wglGetCurrentContext();
HWND hWnd;
HDC hDC, hDC_before=wglGetCurrentDC();
WNDCLASS wndCls;
/* create a dummy window */
ZeroMemory(&wndCls, sizeof(wndCls));
wndCls.lpfnWndProc = DefWindowProc;
wndCls.hInstance = fgDisplay.pDisplay.Instance;
wndCls.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
wndCls.lpszClassName = _T("FREEGLUT_dummy");
RegisterClass( &wndCls );
hWnd=CreateWindow(_T("FREEGLUT_dummy"), _T(""), WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW , 0,0,0,0, 0, 0, fgDisplay.pDisplay.Instance, 0 );
hDC=GetDC(hWnd);
SetPixelFormat( hDC, pixelformat, ppfd );
rc = wglCreateContext( hDC );
wglMakeCurrent(hDC, rc);
if ( fghIsExtensionSupported( hDC, "WGL_ARB_multisample" ) )
{
PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARBProc =
(PFNWGLCHOOSEPIXELFORMATARBPROC) wglGetProcAddress("wglChoosePixelFormatARB");
if ( wglChoosePixelFormatARBProc )
{
int attributes[100];
int iPixelFormat;
BOOL bValid;
float fAttributes[] = { 0, 0 };
UINT numFormats;
fghFillPixelFormatAttributes( attributes, ppfd );
bValid = wglChoosePixelFormatARBProc(hDC, attributes, fAttributes, 1, &iPixelFormat, &numFormats);
if ( bValid && numFormats > 0 )
{
pixelformat = iPixelFormat;
}
}
}
wglMakeCurrent( hDC_before, rc_before);
wglDeleteContext(rc);
ReleaseDC(hWnd, hDC);
DestroyWindow(hWnd);
UnregisterClass(_T("FREEGLUT_dummy"), fgDisplay.pDisplay.Instance);
}
success = ( pixelformat != 0 ) && ( checkOnly || SetPixelFormat( current_hDC, pixelformat, ppfd ) );
if (checkOnly)
DeleteDC(current_hDC);
return success;
#endif /* defined(_WIN32_WCE) */
}