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
24 #include "wine/port.h"
35 #include "gdi_private.h"
36 #include "wine/debug.h"
38 WINE_DEFAULT_DEBUG_CHANNEL(wgl);
40 static HDC default_hdc = 0;
42 /* We route all wgl functions from opengl32.dll through gdi32.dll to
43 * the display driver. Various wgl calls have a hDC as one of their parameters.
44 * Using DC_GetDCPtr we get access to the functions exported by the driver.
45 * Some functions don't receive a hDC. This function creates a global hdc and
46 * if there's already a global hdc, it returns it.
48 static DC* OPENGL_GetDefaultDC()
51 default_hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
53 return DC_GetDCPtr(default_hdc);
56 /***********************************************************************
57 * wglCreateContext (OPENGL32.@)
59 HGLRC WINAPI wglCreateContext(HDC hdc)
62 DC * dc = DC_GetDCPtr( hdc );
68 if (!dc->funcs->pwglCreateContext) FIXME(" :stub\n");
69 else ret = dc->funcs->pwglCreateContext(dc->physDev);
71 GDI_ReleaseObj( hdc );
75 /***********************************************************************
76 * wglMakeCurrent (OPENGL32.@)
78 BOOL WINAPI wglMakeCurrent(HDC hdc, HGLRC hglrc)
83 /* When the context hglrc is NULL, the HDC is ignored and can be NULL.
84 * In that case use the global hDC to get access to the driver. */
86 dc = OPENGL_GetDefaultDC();
88 dc = DC_GetDCPtr( hdc );
90 TRACE("hdc: (%p), hglrc: (%p)\n", hdc, hglrc);
92 if (!dc) return FALSE;
94 if (!dc->funcs->pwglMakeCurrent) FIXME(" :stub\n");
95 else ret = dc->funcs->pwglMakeCurrent(dc->physDev,hglrc);
98 GDI_ReleaseObj(default_hdc);
105 /***********************************************************************
106 * wglUseFontBitmapsA (OPENGL32.@)
108 BOOL WINAPI wglUseFontBitmapsA(HDC hdc, DWORD first, DWORD count, DWORD listBase)
111 DC * dc = DC_GetDCPtr( hdc );
113 TRACE("(%p, %d, %d, %d)\n", hdc, first, count, listBase);
115 if (!dc) return FALSE;
117 if (!dc->funcs->pwglUseFontBitmapsA) FIXME(" :stub\n");
118 else ret = dc->funcs->pwglUseFontBitmapsA(dc->physDev, first, count, listBase);
120 GDI_ReleaseObj( hdc);
124 /***********************************************************************
125 * wglUseFontBitmapsW (OPENGL32.@)
127 BOOL WINAPI wglUseFontBitmapsW(HDC hdc, DWORD first, DWORD count, DWORD listBase)
130 DC * dc = DC_GetDCPtr( hdc );
132 TRACE("(%p, %d, %d, %d)\n", hdc, first, count, listBase);
134 if (!dc) return FALSE;
136 if (!dc->funcs->pwglUseFontBitmapsW) FIXME(" :stub\n");
137 else ret = dc->funcs->pwglUseFontBitmapsW(dc->physDev, first, count, listBase);
139 GDI_ReleaseObj( hdc);