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Adding OpenGL 3.0 context detection for Windows per e-mail from Paul Martz dated Thu 2/12/2009 9:03 AM (more or less)

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git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@766 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
fayjf 2009-02-13 03:22:17 +00:00
parent 100396cef0
commit 91e715a11b
3 changed files with 82 additions and 0 deletions
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1
freeglut/freeglut/src/freeglut_internal.h
View File

@ -813,6 +813,7 @@ GLXFBConfig* fgChooseFBConfig( void );
#if TARGET_HOST_MS_WINDOWS
LRESULT CALLBACK fgWindowProc( HWND hWnd, UINT uMsg,
WPARAM wParam, LPARAM lParam );
GLboolean fgNewWGLCreateContext( SFG_Window* window );
GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
unsigned char layer_type );
#endif

4
freeglut/freeglut/src/freeglut_main.c
View File

@ -1621,6 +1621,10 @@ LRESULT CALLBACK fgWindowProc( HWND hWnd, UINT uMsg, WPARAM wParam,
window->Window.Context =
wglCreateContext( window->Window.Device );
}
#if !defined(_WIN32_WCE)
fgNewWGLCreateContext( window );
#endif
}
window->State.NeedToResize = GL_TRUE;

77
freeglut/freeglut/src/freeglut_window.c
View File

@ -283,6 +283,83 @@ typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATARBPROC) (HDC hdc, const int *piAt
#define WGL_SAMPLES_ARB 0x2042
#ifndef WGL_ARB_create_context
#define WGL_ARB_create_context 1
#ifdef WGL_WGLEXT_PROTOTYPES
extern HGLRC WINAPI wglCreateContextAttribsARB (HDC, HGLRC, const int *);
#endif /* WGL_WGLEXT_PROTOTYPES */
typedef HGLRC (WINAPI * PFNWGLCREATECONTEXTATTRIBSARBPROC) (HDC hDC, HGLRC hShareContext, const int *attribList);
#define WGL_CONTEXT_DEBUG_BIT_ARB 0x0001
#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
#define WGL_CONTEXT_LAYER_PLANE_ARB 0x2093
#define WGL_CONTEXT_FLAGS_ARB 0x2094
#define ERROR_INVALID_VERSION_ARB 0x2095
#endif
GLboolean fgNewWGLCreateContext( SFG_Window* window )
{
if( (fgState.ContextFlags & GLUT_FORWARD_COMPATIBLE) &&
(fgState.MajorVersion > 2) )
{
PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetEntensionsStringARB=NULL;
wglMakeCurrent( window->Window.Device,
window->Window.Context );
wglGetEntensionsStringARB=(PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB");
if (wglGetEntensionsStringARB)
{
const char * pWglExtString=wglGetEntensionsStringARB(window->Window.Device);
if (pWglExtString)
{
if (strstr(pWglExtString, "WGL_ARB_create_context"))
{
/* new context creation */
HGLRC context;
int attribs[7];
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
attribs[0] = WGL_CONTEXT_MAJOR_VERSION_ARB;
attribs[1] = fgState.MajorVersion;
attribs[2] = WGL_CONTEXT_MINOR_VERSION_ARB;
attribs[3] = fgState.MinorVersion;
attribs[4] = WGL_CONTEXT_FLAGS_ARB;
attribs[5] = ((fgState.ContextFlags & GLUT_DEBUG) ? WGL_CONTEXT_DEBUG_BIT_ARB : 0) |
((fgState.ContextFlags & GLUT_FORWARD_COMPATIBLE) ? WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB : 0);
attribs[6] = 0;
wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) wglGetProcAddress( "wglCreateContextAttribsARB" );
if ( wglCreateContextAttribsARB == NULL )
{
fgError( "wglCreateContextAttribsARB not found" );
}
context = wglCreateContextAttribsARB( window->Window.Device, 0, attribs );
if ( context == NULL )
{
fgError( "Unable to create OpenGL %d.%d context (flags %x)",
fgState.MajorVersion, fgState.MinorVersion, fgState.ContextFlags );
}
else
{
fgWarning( "Success 3.0" );
wglMakeCurrent( NULL, NULL );
wglDeleteContext( window->Window.Context );
window->Window.Context = context;
}
}
}
}
}
return GL_TRUE;
}
GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
unsigned char layer_type )
{