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"
36 #include "gdi_private.h"
37 #include "wine/debug.h"
39 WINE_DEFAULT_DEBUG_CHANNEL(wgl);
41 static HDC default_hdc = 0;
43 typedef struct opengl_context
48 /* We route all wgl functions from opengl32.dll through gdi32.dll to
49 * the display driver. Various wgl calls have a hDC as one of their parameters.
50 * Using DC_GetDCPtr we get access to the functions exported by the driver.
51 * Some functions don't receive a hDC. This function creates a global hdc and
52 * if there's already a global hdc, it returns it.
54 static DC* OPENGL_GetDefaultDC()
57 default_hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
59 return DC_GetDCPtr(default_hdc);
62 /***********************************************************************
63 * wglCreateContext (OPENGL32.@)
65 HGLRC WINAPI wglCreateContext(HDC hdc)
68 DC * dc = DC_GetDCPtr( hdc );
74 if (!dc->funcs->pwglCreateContext) FIXME(" :stub\n");
75 else ret = dc->funcs->pwglCreateContext(dc->physDev);
77 GDI_ReleaseObj( hdc );
82 /***********************************************************************
83 * wglDeleteContext (OPENGL32.@)
85 BOOL WINAPI wglDeleteContext(HGLRC hglrc)
89 OPENGL_Context ctx = (OPENGL_Context)hglrc;
91 TRACE("hglrc: (%p)\n", hglrc);
95 /* Retrieve the HDC associated with the context to access the display driver */
96 dc = DC_GetDCPtr(ctx->hdc);
97 if (!dc) return FALSE;
99 if (!dc->funcs->pwglDeleteContext) FIXME(" :stub\n");
100 else ret = dc->funcs->pwglDeleteContext(hglrc);
102 GDI_ReleaseObj(ctx->hdc);
106 /***********************************************************************
107 * wglGetCurrentContext (OPENGL32.@)
109 HGLRC WINAPI wglGetCurrentContext(void)
111 HGLRC ret = NtCurrentTeb()->glContext;
112 TRACE(" returning %p\n", ret);
116 /***********************************************************************
117 * wglGetCurrentDC (OPENGL32.@)
119 HDC WINAPI wglGetCurrentDC(void)
121 OPENGL_Context ctx = (OPENGL_Context)wglGetCurrentContext();
123 TRACE(" found context: %p\n", ctx);
127 /* Retrieve the current DC from the active context */
128 TRACE(" returning hdc: %p\n", ctx->hdc);
132 /***********************************************************************
135 static HDC WINAPI wglGetPbufferDCARB(void *pbuffer)
139 /* Create a device context to associate with the pbuffer */
140 HDC hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
141 DC *dc = DC_GetDCPtr(hdc);
143 TRACE("(%p)\n", pbuffer);
145 if (!dc) return FALSE;
147 /* The display driver has to do the rest of the work because
148 * we need access to lowlevel datatypes which we can't access here
150 if (!dc->funcs->pwglGetPbufferDCARB) FIXME(" :stub\n");
151 else ret = dc->funcs->pwglGetPbufferDCARB(dc->physDev, pbuffer);
153 TRACE("(%p), hdc=%p\n", pbuffer, ret);
159 /***********************************************************************
160 * wglMakeCurrent (OPENGL32.@)
162 BOOL WINAPI wglMakeCurrent(HDC hdc, HGLRC hglrc)
167 /* When the context hglrc is NULL, the HDC is ignored and can be NULL.
168 * In that case use the global hDC to get access to the driver. */
170 dc = OPENGL_GetDefaultDC();
172 dc = DC_GetDCUpdate( hdc );
174 TRACE("hdc: (%p), hglrc: (%p)\n", hdc, hglrc);
176 if (!dc) return FALSE;
178 if (!dc->funcs->pwglMakeCurrent) FIXME(" :stub\n");
179 else ret = dc->funcs->pwglMakeCurrent(dc->physDev,hglrc);
182 GDI_ReleaseObj(default_hdc);
189 /***********************************************************************
190 * wglMakeContextCurrentARB
192 static BOOL WINAPI wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
198 TRACE("hDrawDC: (%p), hReadDC: (%p) hglrc: (%p)\n", hDrawDC, hReadDC, hglrc);
200 /* Both hDrawDC and hReadDC need to be valid */
201 DrawDC = DC_GetDCPtr( hDrawDC);
202 if (!DrawDC) return FALSE;
204 ReadDC = DC_GetDCPtr( hReadDC);
206 GDI_ReleaseObj(hDrawDC);
210 if (!DrawDC->funcs->pwglMakeContextCurrentARB) FIXME(" :stub\n");
211 else ret = DrawDC->funcs->pwglMakeContextCurrentARB(DrawDC->physDev, ReadDC->physDev, hglrc);
213 GDI_ReleaseObj(hDrawDC);
214 GDI_ReleaseObj(hReadDC);
219 /***********************************************************************
220 * wglShareLists (OPENGL32.@)
222 BOOL WINAPI wglShareLists(HGLRC hglrc1, HGLRC hglrc2)
226 OPENGL_Context ctx = (OPENGL_Context)hglrc1;
228 TRACE("hglrc1: (%p); hglrc: (%p)\n", hglrc1, hglrc2);
232 /* Retrieve the HDC associated with the context to access the display driver */
233 dc = DC_GetDCPtr(ctx->hdc);
234 if (!dc) return FALSE;
236 if (!dc->funcs->pwglShareLists) FIXME(" :stub\n");
237 else ret = dc->funcs->pwglShareLists(hglrc1, hglrc2);
239 GDI_ReleaseObj(ctx->hdc);
243 /***********************************************************************
244 * wglUseFontBitmapsA (OPENGL32.@)
246 BOOL WINAPI wglUseFontBitmapsA(HDC hdc, DWORD first, DWORD count, DWORD listBase)
249 DC * dc = DC_GetDCPtr( hdc );
251 TRACE("(%p, %d, %d, %d)\n", hdc, first, count, listBase);
253 if (!dc) return FALSE;
255 if (!dc->funcs->pwglUseFontBitmapsA) FIXME(" :stub\n");
256 else ret = dc->funcs->pwglUseFontBitmapsA(dc->physDev, first, count, listBase);
258 GDI_ReleaseObj( hdc);
262 /***********************************************************************
263 * wglUseFontBitmapsW (OPENGL32.@)
265 BOOL WINAPI wglUseFontBitmapsW(HDC hdc, DWORD first, DWORD count, DWORD listBase)
268 DC * dc = DC_GetDCPtr( hdc );
270 TRACE("(%p, %d, %d, %d)\n", hdc, first, count, listBase);
272 if (!dc) return FALSE;
274 if (!dc->funcs->pwglUseFontBitmapsW) FIXME(" :stub\n");
275 else ret = dc->funcs->pwglUseFontBitmapsW(dc->physDev, first, count, listBase);
277 GDI_ReleaseObj( hdc);
281 /***********************************************************************
282 * Internal wglGetProcAddress for retrieving WGL extensions
284 PROC WINAPI wglGetProcAddress(LPCSTR func)
292 TRACE("func: '%p'\n", func);
294 /* Retrieve the global hDC to get access to the driver. */
295 dc = OPENGL_GetDefaultDC();
296 if (!dc) return FALSE;
298 if (!dc->funcs->pwglGetProcAddress) FIXME(" :stub\n");
299 else ret = dc->funcs->pwglGetProcAddress(func);
301 GDI_ReleaseObj(default_hdc);
303 /* At the moment we implement one WGL extension which requires a HDC. When we
304 * are looking up this call and when the Extension is available (that is the case
305 * when a non-NULL value is returned by wglGetProcAddress), we return the address
306 * of a wrapper function which will handle the HDC->PhysDev conversion.
308 if(ret && strcmp(func, "wglMakeContextCurrentARB") == 0)
309 return wglMakeContextCurrentARB;
310 else if(ret && strcmp(func, "wglGetPbufferDCARB") == 0)
311 return (PROC)wglGetPbufferDCARB;