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