dlls/gdi32/opengl.c

   1 /*
   2  * OpenGL function forwarding to the display driver
   3  *
   4  * Copyright (c) 1999 Lionel Ulmer
   5  * Copyright (c) 2005 Raphael Junqueira
   6  * Copyright (c) 2006 Roderick Colenbrander
   7  *
   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.
  12  *
  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.
  17  *
  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
  21  */
  22
  23 #include <stdarg.h>
  24 #include <string.h>
  25 #include <stdlib.h>
  26
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "wingdi.h"
  30 #include "winerror.h"
  31 #include "winternl.h"
  32 #include "winnt.h"
  33 #include "ntgdi_private.h"
  34
  35
  36 static HMODULE opengl32;
  37 static INT (WINAPI *wglChoosePixelFormat)(HDC,const PIXELFORMATDESCRIPTOR *);
  38 static INT (WINAPI *wglDescribePixelFormat)(HDC,INT,UINT,PIXELFORMATDESCRIPTOR*);
  39 static INT (WINAPI *wglGetPixelFormat)(HDC);
  40 static BOOL (WINAPI *wglSetPixelFormat)(HDC,INT,const PIXELFORMATDESCRIPTOR*);
  41 static BOOL (WINAPI *wglSwapBuffers)(HDC);
  42
  43 /***********************************************************************
  44  *      __wine_get_wgl_driver  (GDI32.@)
  45  */
  46 struct opengl_funcs * CDECL __wine_get_wgl_driver( HDC hdc, UINT version )
  47 {
  48     struct opengl_funcs *ret = NULL;
  49     DC * dc = get_dc_ptr( hdc );
  50
  51     if (dc)
  52     {
  53         PHYSDEV physdev = GET_DC_PHYSDEV( dc, wine_get_wgl_driver );
  54         ret = physdev->funcs->wine_get_wgl_driver( physdev, version );
  55         release_dc_ptr( dc );
  56     }
  57     return ret;
  58 }
  59
  60 /******************************************************************************
  61  *              ChoosePixelFormat (GDI32.@)
  62  */
  63 INT WINAPI ChoosePixelFormat( HDC hdc, const PIXELFORMATDESCRIPTOR *pfd )
  64 {
  65     if (!wglChoosePixelFormat)
  66     {
  67         if (!opengl32) opengl32 = LoadLibraryW( L"opengl32.dll" );
  68         if (!(wglChoosePixelFormat = (void *)GetProcAddress( opengl32, "wglChoosePixelFormat" )))
  69             return 0;
  70     }
  71     return wglChoosePixelFormat( hdc, pfd );
  72 }
  73
  74 /******************************************************************************
  75  *              DescribePixelFormat (GDI32.@)
  76  */
  77 INT WINAPI DescribePixelFormat( HDC hdc, INT fmt, UINT size, PIXELFORMATDESCRIPTOR *pfd )
  78 {
  79     if (!wglDescribePixelFormat)
  80     {
  81         if (!opengl32) opengl32 = LoadLibraryW( L"opengl32.dll" );
  82         if (!(wglDescribePixelFormat = (void *)GetProcAddress( opengl32, "wglDescribePixelFormat" )))
  83             return 0;
  84     }
  85     return wglDescribePixelFormat( hdc, fmt, size, pfd );
  86 }
  87
  88 /******************************************************************************
  89  *              GetPixelFormat (GDI32.@)
  90  */
  91 INT WINAPI GetPixelFormat( HDC hdc )
  92 {
  93     if (!wglGetPixelFormat)
  94     {
  95         if (!opengl32) opengl32 = LoadLibraryW( L"opengl32.dll" );
  96         if (!(wglGetPixelFormat = (void *)GetProcAddress( opengl32, "wglGetPixelFormat" )))
  97             return 0;
  98     }
  99     return wglGetPixelFormat( hdc );
 100 }
 101
 102 /******************************************************************************
 103  *              SetPixelFormat (GDI32.@)
 104  */
 105 BOOL WINAPI SetPixelFormat( HDC hdc, INT fmt, const PIXELFORMATDESCRIPTOR *pfd )
 106 {
 107     if (!wglSetPixelFormat)
 108     {
 109         if (!opengl32) opengl32 = LoadLibraryW( L"opengl32.dll" );
 110         if (!(wglSetPixelFormat = (void *)GetProcAddress( opengl32, "wglSetPixelFormat" )))
 111             return FALSE;
 112     }
 113     return wglSetPixelFormat( hdc, fmt, pfd );
 114 }
 115
 116 /******************************************************************************
 117  *              SwapBuffers (GDI32.@)
 118  */
 119 BOOL WINAPI SwapBuffers( HDC hdc )
 120 {
 121     if (!wglSwapBuffers)
 122     {
 123         if (!opengl32) opengl32 = LoadLibraryW( L"opengl32.dll" );
 124         if (!(wglSwapBuffers = (void *)GetProcAddress( opengl32, "wglSwapBuffers" )))
 125             return FALSE;
 126     }
 127     return wglSwapBuffers( hdc );
 128 }