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 "config.h"
  24 #include "wine/port.h"
  25
  26 #include <stdarg.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "wingdi.h"
  33 #include "winerror.h"
  34 #include "winternl.h"
  35 #include "winnt.h"
  36 #include "gdi_private.h"
  37 #include "wine/debug.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(wgl);
  40
  41 static const WCHAR opengl32W[] = {'o','p','e','n','g','l','3','2','.','d','l','l',0};
  42 static HMODULE opengl32;
  43 static INT (WINAPI *wglChoosePixelFormat)(HDC,const PIXELFORMATDESCRIPTOR *);
  44 static INT (WINAPI *wglDescribePixelFormat)(HDC,INT,UINT,PIXELFORMATDESCRIPTOR*);
  45 static INT (WINAPI *wglGetPixelFormat)(HDC);
  46 static BOOL (WINAPI *wglSetPixelFormat)(HDC,INT,const PIXELFORMATDESCRIPTOR*);
  47 static BOOL (WINAPI *wglSwapBuffers)(HDC);
  48
  49 /***********************************************************************
  50  *      __wine_get_wgl_driver  (GDI32.@)
  51  */
  52 const struct wgl_funcs * CDECL __wine_get_wgl_driver( HDC hdc, UINT version )
  53 {
  54     const struct wgl_funcs *ret = NULL;
  55     DC * dc = get_dc_ptr( hdc );
  56
  57     if (dc)
  58     {
  59         PHYSDEV physdev = GET_DC_PHYSDEV( dc, wine_get_wgl_driver );
  60         ret = physdev->funcs->wine_get_wgl_driver( physdev, version );
  61         release_dc_ptr( dc );
  62     }
  63     return ret;
  64 }
  65
  66 /******************************************************************************
  67  *              ChoosePixelFormat (GDI32.@)
  68  */
  69 INT WINAPI ChoosePixelFormat( HDC hdc, const PIXELFORMATDESCRIPTOR *pfd )
  70 {
  71     if (!wglChoosePixelFormat)
  72     {
  73         if (!opengl32) opengl32 = LoadLibraryW( opengl32W );
  74         if (!(wglChoosePixelFormat = (void *)GetProcAddress( opengl32, "wglChoosePixelFormat" )))
  75             return 0;
  76     }
  77     return wglChoosePixelFormat( hdc, pfd );
  78 }
  79
  80 /******************************************************************************
  81  *              DescribePixelFormat (GDI32.@)
  82  */
  83 INT WINAPI DescribePixelFormat( HDC hdc, INT fmt, UINT size, PIXELFORMATDESCRIPTOR *pfd )
  84 {
  85     if (!wglDescribePixelFormat)
  86     {
  87         if (!opengl32) opengl32 = LoadLibraryW( opengl32W );
  88         if (!(wglDescribePixelFormat = (void *)GetProcAddress( opengl32, "wglDescribePixelFormat" )))
  89             return 0;
  90     }
  91     return wglDescribePixelFormat( hdc, fmt, size, pfd );
  92 }
  93
  94 /******************************************************************************
  95  *              GetPixelFormat (GDI32.@)
  96  */
  97 INT WINAPI GetPixelFormat( HDC hdc )
  98 {
  99     if (!wglGetPixelFormat)
 100     {
 101         if (!opengl32) opengl32 = LoadLibraryW( opengl32W );
 102         if (!(wglGetPixelFormat = (void *)GetProcAddress( opengl32, "wglGetPixelFormat" )))
 103             return 0;
 104     }
 105     return wglGetPixelFormat( hdc );
 106 }
 107
 108 /******************************************************************************
 109  *              SetPixelFormat (GDI32.@)
 110  */
 111 BOOL WINAPI SetPixelFormat( HDC hdc, INT fmt, const PIXELFORMATDESCRIPTOR *pfd )
 112 {
 113     if (!wglSetPixelFormat)
 114     {
 115         if (!opengl32) opengl32 = LoadLibraryW( opengl32W );
 116         if (!(wglSetPixelFormat = (void *)GetProcAddress( opengl32, "wglSetPixelFormat" )))
 117             return 0;
 118     }
 119     return wglSetPixelFormat( hdc, fmt, pfd );
 120 }
 121
 122 /******************************************************************************
 123  *              SwapBuffers (GDI32.@)
 124  */
 125 BOOL WINAPI SwapBuffers( HDC hdc )
 126 {
 127     if (!wglSwapBuffers)
 128     {
 129         if (!opengl32) opengl32 = LoadLibraryW( opengl32W );
 130         if (!(wglSwapBuffers = (void *)GetProcAddress( opengl32, "wglSwapBuffers" )))
 131             return 0;
 132     }
 133     return wglSwapBuffers( hdc );
 134 }