2 * OpenGL function forwarding to the display driver
4 * Copyright (c) 1999 Lionel Ulmer
5 * Copyright (c) 2005 Raphael Junqueira
6 * Copyright (c) 2006 Roderick Colenbrander
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
35 static HMODULE opengl32
;
36 static INT (WINAPI
*wglChoosePixelFormat
)(HDC
,const PIXELFORMATDESCRIPTOR
*);
37 static INT (WINAPI
*wglDescribePixelFormat
)(HDC
,INT
,UINT
,PIXELFORMATDESCRIPTOR
*);
38 static INT (WINAPI
*wglGetPixelFormat
)(HDC
);
39 static BOOL (WINAPI
*wglSetPixelFormat
)(HDC
,INT
,const PIXELFORMATDESCRIPTOR
*);
40 static BOOL (WINAPI
*wglSwapBuffers
)(HDC
);
42 /******************************************************************************
43 * ChoosePixelFormat (GDI32.@)
45 INT WINAPI
ChoosePixelFormat( HDC hdc
, const PIXELFORMATDESCRIPTOR
*pfd
)
47 if (!wglChoosePixelFormat
)
49 if (!opengl32
) opengl32
= LoadLibraryW( L
"opengl32.dll" );
50 if (!(wglChoosePixelFormat
= (void *)GetProcAddress( opengl32
, "wglChoosePixelFormat" )))
53 return wglChoosePixelFormat( hdc
, pfd
);
56 /******************************************************************************
57 * DescribePixelFormat (GDI32.@)
59 INT WINAPI
DescribePixelFormat( HDC hdc
, INT fmt
, UINT size
, PIXELFORMATDESCRIPTOR
*pfd
)
61 if (!wglDescribePixelFormat
)
63 if (!opengl32
) opengl32
= LoadLibraryW( L
"opengl32.dll" );
64 if (!(wglDescribePixelFormat
= (void *)GetProcAddress( opengl32
, "wglDescribePixelFormat" )))
67 return wglDescribePixelFormat( hdc
, fmt
, size
, pfd
);
70 /******************************************************************************
71 * GetPixelFormat (GDI32.@)
73 INT WINAPI
GetPixelFormat( HDC hdc
)
75 if (!wglGetPixelFormat
)
77 if (!opengl32
) opengl32
= LoadLibraryW( L
"opengl32.dll" );
78 if (!(wglGetPixelFormat
= (void *)GetProcAddress( opengl32
, "wglGetPixelFormat" )))
81 return wglGetPixelFormat( hdc
);
84 /******************************************************************************
85 * SetPixelFormat (GDI32.@)
87 BOOL WINAPI
SetPixelFormat( HDC hdc
, INT fmt
, const PIXELFORMATDESCRIPTOR
*pfd
)
89 if (!wglSetPixelFormat
)
91 if (!opengl32
) opengl32
= LoadLibraryW( L
"opengl32.dll" );
92 if (!(wglSetPixelFormat
= (void *)GetProcAddress( opengl32
, "wglSetPixelFormat" )))
95 return wglSetPixelFormat( hdc
, fmt
, pfd
);
98 /******************************************************************************
99 * SwapBuffers (GDI32.@)
101 BOOL WINAPI
SwapBuffers( HDC hdc
)
105 if (!opengl32
) opengl32
= LoadLibraryW( L
"opengl32.dll" );
106 if (!(wglSwapBuffers
= (void *)GetProcAddress( opengl32
, "wglSwapBuffers" )))
109 return wglSwapBuffers( hdc
);