1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2011 Morgan Armand <morgan.devel@gmail.com>
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 "gldrv.h"
34 #include "stw_context.h"
35 #include "stw_device.h"
36 #include "stw_ext_context.h"
37
38 #include "util/u_debug.h"
39
40
41 static wglCreateContext_t wglCreateContext_func = 0;
42 static wglDeleteContext_t wglDeleteContext_func = 0;
43
44 /* When this library is used as a opengl32.dll drop-in replacement, ensure we
45 * use the wglCreate/Destroy entrypoints above, and not the true opengl32.dll,
46 * which could happen if this library's name is not opengl32.dll exactly.
47 *
48 * For example, Qt 5.4 bundles this as opengl32sw.dll:
49 * https://blog.qt.io/blog/2014/11/27/qt-weekly-21-dynamic-opengl-implementation-loading-in-qt-5-4/
50 */
51 void
stw_override_opengl32_entry_points(wglCreateContext_t create,wglDeleteContext_t delete)52 stw_override_opengl32_entry_points(wglCreateContext_t create, wglDeleteContext_t delete)
53 {
54 wglCreateContext_func = create;
55 wglDeleteContext_func = delete;
56 }
57
58
59 /**
60 * The implementation of this function is tricky. The OPENGL32.DLL library
61 * remaps the context IDs returned by our stw_create_context_attribs()
62 * function to different values returned to the caller of wglCreateContext().
63 * That is, DHGLRC (driver) handles are not equivalent to HGLRC (public)
64 * handles.
65 *
66 * So we need to generate a new HGLRC ID here. We do that by calling
67 * the regular wglCreateContext() function. Then, we replace the newly-
68 * created stw_context with a new stw_context that reflects the arguments
69 * to this function.
70 */
71 HGLRC WINAPI
wglCreateContextAttribsARB(HDC hDC,HGLRC hShareContext,const int * attribList)72 wglCreateContextAttribsARB(HDC hDC, HGLRC hShareContext, const int *attribList)
73 {
74 HGLRC context;
75
76 int majorVersion = 1, minorVersion = 0, layerPlane = 0;
77 int contextFlags = 0x0;
78 int profileMask = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
79 int resetStrategy = WGL_NO_RESET_NOTIFICATION_ARB;
80 int i;
81 BOOL done = FALSE;
82 const int contextFlagsAll = (WGL_CONTEXT_DEBUG_BIT_ARB |
83 WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB |
84 WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB);
85
86 /* parse attrib_list */
87 if (attribList) {
88 for (i = 0; !done && attribList[i]; i++) {
89 switch (attribList[i]) {
90 case WGL_CONTEXT_MAJOR_VERSION_ARB:
91 majorVersion = attribList[++i];
92 break;
93 case WGL_CONTEXT_MINOR_VERSION_ARB:
94 minorVersion = attribList[++i];
95 break;
96 case WGL_CONTEXT_LAYER_PLANE_ARB:
97 layerPlane = attribList[++i];
98 break;
99 case WGL_CONTEXT_FLAGS_ARB:
100 contextFlags = attribList[++i];
101 break;
102 case WGL_CONTEXT_PROFILE_MASK_ARB:
103 profileMask = attribList[++i];
104 break;
105 case WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB:
106 resetStrategy = attribList[++i];
107 break;
108 case 0:
109 /* end of list */
110 done = TRUE;
111 break;
112 default:
113 /* bad attribute */
114 SetLastError(ERROR_INVALID_PARAMETER);
115 return 0;
116 }
117 }
118 }
119
120 /* check contextFlags */
121 if (contextFlags & ~contextFlagsAll) {
122 SetLastError(ERROR_INVALID_PARAMETER);
123 return NULL;
124 }
125
126 /* check profileMask */
127 if (profileMask != WGL_CONTEXT_CORE_PROFILE_BIT_ARB &&
128 profileMask != WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB &&
129 profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT) {
130 SetLastError(ERROR_INVALID_PROFILE_ARB);
131 return NULL;
132 }
133
134 /* check version (generate ERROR_INVALID_VERSION_ARB if bad) */
135 if (majorVersion <= 0 ||
136 minorVersion < 0 ||
137 (profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
138 ((majorVersion == 1 && minorVersion > 5) ||
139 (majorVersion == 2 && minorVersion > 1) ||
140 (majorVersion == 3 && minorVersion > 3) ||
141 (majorVersion == 4 && minorVersion > 6) ||
142 majorVersion > 4)) ||
143 (profileMask == WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
144 ((majorVersion == 1 && minorVersion > 1) ||
145 (majorVersion == 2 && minorVersion > 0) ||
146 (majorVersion == 3 && minorVersion > 1) ||
147 majorVersion > 3))) {
148 SetLastError(ERROR_INVALID_VERSION_ARB);
149 return NULL;
150 }
151
152 if ((contextFlags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
153 majorVersion < 3) {
154 SetLastError(ERROR_INVALID_VERSION_ARB);
155 return 0;
156 }
157
158 if (resetStrategy != WGL_NO_RESET_NOTIFICATION_ARB &&
159 resetStrategy != WGL_LOSE_CONTEXT_ON_RESET_ARB) {
160 SetLastError(ERROR_INVALID_PARAMETER);
161 return NULL;
162 }
163
164 /* Get pointer to OPENGL32.DLL's wglCreate/DeleteContext() functions */
165 if (!wglCreateContext_func || !wglDeleteContext_func) {
166 /* Get the OPENGL32.DLL library */
167 HMODULE opengl_lib = GetModuleHandleA("opengl32.dll");
168 if (!opengl_lib) {
169 _debug_printf("wgl: GetModuleHandleA(\"opengl32.dll\") failed\n");
170 return 0;
171 }
172
173 /* Get pointer to wglCreateContext() function */
174 wglCreateContext_func = (wglCreateContext_t)
175 GetProcAddress(opengl_lib, "wglCreateContext");
176 if (!wglCreateContext_func) {
177 _debug_printf("wgl: failed to get wglCreateContext()\n");
178 return 0;
179 }
180
181 /* Get pointer to wglDeleteContext() function */
182 wglDeleteContext_func = (wglDeleteContext_t)
183 GetProcAddress(opengl_lib, "wglDeleteContext");
184 if (!wglDeleteContext_func) {
185 _debug_printf("wgl: failed to get wglDeleteContext()\n");
186 return 0;
187 }
188 }
189
190 /* Call wglCreateContext to get a valid context ID */
191 context = wglCreateContext_func(hDC);
192
193 if (context) {
194 /* Now replace the context we just created with a new one that reflects
195 * the attributes passed to this function.
196 */
197 DHGLRC dhglrc, c, share_dhglrc = 0;
198
199 /* Convert public HGLRC to driver DHGLRC */
200 if (stw_dev && stw_dev->callbacks.pfnGetDhglrc) {
201 dhglrc = stw_dev->callbacks.pfnGetDhglrc(context);
202 if (hShareContext)
203 share_dhglrc = stw_dev->callbacks.pfnGetDhglrc(hShareContext);
204 }
205 else {
206 /* not using ICD */
207 dhglrc = (DHGLRC)(INT_PTR)context;
208 share_dhglrc = (DHGLRC)(INT_PTR)hShareContext;
209 }
210
211 struct stw_context *share_stw = stw_lookup_context(share_dhglrc);
212
213 struct stw_context *stw_ctx = stw_create_context_attribs(hDC, layerPlane, share_stw,
214 majorVersion, minorVersion,
215 contextFlags, profileMask, 0,
216 resetStrategy);
217
218 if (!stw_ctx) {
219 wglDeleteContext_func(context);
220 return 0;
221 }
222
223 c = stw_create_context_handle(stw_ctx, dhglrc);
224 if (!c) {
225 stw_destroy_context(stw_ctx);
226 wglDeleteContext_func(context);
227 context = 0;
228 }
229 }
230
231 return context;
232 }
233
234
235 /** Defined by WGL_ARB_make_current_read */
236 BOOL APIENTRY
wglMakeContextCurrentARB(HDC hDrawDC,HDC hReadDC,HGLRC hglrc)237 wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
238 {
239 DHGLRC dhglrc = 0;
240
241 if (stw_dev && stw_dev->callbacks.pfnGetDhglrc) {
242 /* Convert HGLRC to DHGLRC */
243 dhglrc = stw_dev->callbacks.pfnGetDhglrc(hglrc);
244 }
245
246 return stw_make_current_by_handles(hDrawDC, hReadDC, dhglrc);
247 }
248
249 HDC APIENTRY
wglGetCurrentReadDCARB(VOID)250 wglGetCurrentReadDCARB(VOID)
251 {
252 return stw_get_current_read_dc();
253 }
254