1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2011 Morgan Armand <[email protected]>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include <stdio.h>
26 #include <windows.h>
27
28 #define WGL_WGLEXT_PROTOTYPES
29
30 #include <GL/gl.h>
31 #include <GL/wglext.h>
32
33 #include "stw_gdishim.h"
34 #include "gldrv.h"
35 #include "stw_context.h"
36 #include "stw_device.h"
37 #include "stw_ext_context.h"
38
39 #include "util/u_debug.h"
40
41
42 static wglCreateContext_t g_pfnwglCreateContext = NULL;
43 static wglDeleteContext_t g_pfnwglDeleteContext = NULL;
44
45 /* When this library is used as a opengl32.dll drop-in replacement, ensure we
46 * use the wglCreate/Destroy entrypoints above, and not the true opengl32.dll,
47 * which could happen if this library's name is not opengl32.dll exactly.
48 *
49 * For example, Qt 5.4 bundles this as opengl32sw.dll:
50 * https://blog.qt.io/blog/2014/11/27/qt-weekly-21-dynamic-opengl-implementation-loading-in-qt-5-4/
51 */
52 void
stw_override_opengl32_entry_points(wglCreateContext_t create,wglDeleteContext_t delete)53 stw_override_opengl32_entry_points(wglCreateContext_t create, wglDeleteContext_t delete)
54 {
55 g_pfnwglCreateContext = create;
56 g_pfnwglDeleteContext = delete;
57 }
58
59
60 /**
61 * The implementation of this function is tricky. The OPENGL32.DLL library
62 * remaps the context IDs returned by our stw_create_context_attribs()
63 * function to different values returned to the caller of wglCreateContext().
64 * That is, DHGLRC (driver) handles are not equivalent to HGLRC (public)
65 * handles.
66 *
67 * So we need to generate a new HGLRC ID here. We do that by calling
68 * the regular wglCreateContext() function. Then, we replace the newly-
69 * created stw_context with a new stw_context that reflects the arguments
70 * to this function.
71 */
72 HGLRC WINAPI
wglCreateContextAttribsARB(HDC hDC,HGLRC hShareContext,const int * attribList)73 wglCreateContextAttribsARB(HDC hDC, HGLRC hShareContext, const int *attribList)
74 {
75 HGLRC context;
76
77 int majorVersion = 1, minorVersion = 0, layerPlane = 0;
78 int contextFlags = 0x0;
79 int profileMask = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
80 int resetStrategy = WGL_NO_RESET_NOTIFICATION_ARB;
81 int i;
82 BOOL done = false;
83 const int contextFlagsAll = (WGL_CONTEXT_DEBUG_BIT_ARB |
84 WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB |
85 WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB);
86
87 if (!stw_dev)
88 return NULL;
89
90 /* parse attrib_list */
91 if (attribList) {
92 for (i = 0; !done && attribList[i]; i++) {
93 switch (attribList[i]) {
94 case WGL_CONTEXT_MAJOR_VERSION_ARB:
95 majorVersion = attribList[++i];
96 break;
97 case WGL_CONTEXT_MINOR_VERSION_ARB:
98 minorVersion = attribList[++i];
99 break;
100 case WGL_CONTEXT_LAYER_PLANE_ARB:
101 layerPlane = attribList[++i];
102 break;
103 case WGL_CONTEXT_FLAGS_ARB:
104 contextFlags = attribList[++i];
105 break;
106 case WGL_CONTEXT_PROFILE_MASK_ARB:
107 profileMask = attribList[++i];
108 break;
109 case WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB:
110 resetStrategy = attribList[++i];
111 break;
112 case 0:
113 /* end of list */
114 done = true;
115 break;
116 default:
117 /* bad attribute */
118 SetLastError(ERROR_INVALID_PARAMETER);
119 return 0;
120 }
121 }
122 }
123
124 /* check contextFlags */
125 if (contextFlags & ~contextFlagsAll) {
126 SetLastError(ERROR_INVALID_PARAMETER);
127 return NULL;
128 }
129
130 /* check profileMask */
131 if (profileMask != WGL_CONTEXT_CORE_PROFILE_BIT_ARB &&
132 profileMask != WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB &&
133 profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT) {
134 SetLastError(ERROR_INVALID_PROFILE_ARB);
135 return NULL;
136 }
137
138 /* check version (generate ERROR_INVALID_VERSION_ARB if bad) */
139 if (majorVersion <= 0 ||
140 minorVersion < 0 ||
141 (profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
142 ((majorVersion == 1 && minorVersion > 5) ||
143 (majorVersion == 2 && minorVersion > 1) ||
144 (majorVersion == 3 && minorVersion > 3) ||
145 (majorVersion == 4 && minorVersion > 6) ||
146 majorVersion > 4)) ||
147 (profileMask == WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
148 ((majorVersion == 1 && minorVersion > 1) ||
149 (majorVersion == 2 && minorVersion > 0) ||
150 (majorVersion == 3 && minorVersion > 1) ||
151 majorVersion > 3))) {
152 SetLastError(ERROR_INVALID_VERSION_ARB);
153 return NULL;
154 }
155
156 if ((contextFlags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
157 majorVersion < 3) {
158 SetLastError(ERROR_INVALID_VERSION_ARB);
159 return 0;
160 }
161
162 if (resetStrategy != WGL_NO_RESET_NOTIFICATION_ARB &&
163 resetStrategy != WGL_LOSE_CONTEXT_ON_RESET_ARB) {
164 SetLastError(ERROR_INVALID_PARAMETER);
165 return NULL;
166 }
167
168 wglCreateContext_t pfnwglCreateContext;
169 wglDeleteContext_t pfnwglDeleteContext;
170
171 if (stw_dev->callbacks.pfnGetDhglrc) {
172 /* Used as an ICD.
173 *
174 * Get pointers to OPENGL32.DLL's wglCreate/DeleteContext() functions
175 */
176 HMODULE opengl_lib = GetModuleHandleA("opengl32.dll");
177 if (!opengl_lib) {
178 _debug_printf("wgl: GetModuleHandleA(\"opengl32.dll\") failed\n");
179 return NULL;
180 }
181
182 pfnwglCreateContext = (wglCreateContext_t)
183 GetProcAddress(opengl_lib, "wglCreateContext");
184 if (!pfnwglCreateContext) {
185 _debug_printf("wgl: failed to get wglCreateContext()\n");
186 return NULL;
187 }
188
189 pfnwglDeleteContext = (wglDeleteContext_t)
190 GetProcAddress(opengl_lib, "wglDeleteContext");
191 if (!pfnwglDeleteContext) {
192 _debug_printf("wgl: failed to get wglDeleteContext()\n");
193 return NULL;
194 }
195 } else {
196 /* Used as opengl32.dll drop-in alternative. */
197 assert(g_pfnwglCreateContext != NULL);
198 assert(g_pfnwglDeleteContext != NULL);
199 pfnwglCreateContext = g_pfnwglCreateContext;
200 pfnwglDeleteContext = g_pfnwglDeleteContext;
201 }
202
203 /* Call wglCreateContext to get a valid context ID */
204 context = pfnwglCreateContext(hDC);
205
206 if (context) {
207 /* Now replace the context we just created with a new one that reflects
208 * the attributes passed to this function.
209 */
210 DHGLRC dhglrc, c, share_dhglrc = 0;
211
212 /* Convert public HGLRC to driver DHGLRC */
213 if (stw_dev && stw_dev->callbacks.pfnGetDhglrc) {
214 dhglrc = stw_dev->callbacks.pfnGetDhglrc(context);
215 if (hShareContext)
216 share_dhglrc = stw_dev->callbacks.pfnGetDhglrc(hShareContext);
217 }
218 else {
219 /* not using ICD */
220 dhglrc = (DHGLRC)(INT_PTR)context;
221 share_dhglrc = (DHGLRC)(INT_PTR)hShareContext;
222 }
223
224 struct stw_context *share_stw = stw_lookup_context(share_dhglrc);
225
226 const struct stw_pixelformat_info *pfi = stw_pixelformat_get_info_from_hdc(hDC);
227 if (!pfi)
228 return 0;
229
230 struct stw_context *stw_ctx = stw_create_context_attribs(hDC, layerPlane, share_stw,
231 stw_dev->fscreen,
232 majorVersion, minorVersion,
233 contextFlags, profileMask, pfi,
234 resetStrategy);
235
236 if (!stw_ctx) {
237 pfnwglDeleteContext(context);
238 return NULL;
239 }
240
241 c = stw_create_context_handle(stw_ctx, dhglrc);
242 if (!c) {
243 stw_destroy_context(stw_ctx);
244 pfnwglDeleteContext(context);
245 context = NULL;
246 }
247 }
248
249 return context;
250 }
251
252
253 /** Defined by WGL_ARB_make_current_read */
254 BOOL APIENTRY
wglMakeContextCurrentARB(HDC hDrawDC,HDC hReadDC,HGLRC hglrc)255 wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
256 {
257 DHGLRC dhglrc = 0;
258
259 if (stw_dev && stw_dev->callbacks.pfnGetDhglrc) {
260 /* Convert HGLRC to DHGLRC */
261 dhglrc = stw_dev->callbacks.pfnGetDhglrc(hglrc);
262 } else {
263 /* not using ICD */
264 dhglrc = (DHGLRC)(INT_PTR)hglrc;
265 }
266
267 return stw_make_current_by_handles(hDrawDC, hReadDC, dhglrc);
268 }
269
270 HDC APIENTRY
wglGetCurrentReadDCARB(VOID)271 wglGetCurrentReadDCARB(VOID)
272 {
273 return stw_get_current_read_dc();
274 }
275