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 i;
80 BOOL done = FALSE;
81 const int contextFlagsAll = (WGL_CONTEXT_DEBUG_BIT_ARB |
82 WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB);
83
84 /* parse attrib_list */
85 if (attribList) {
86 for (i = 0; !done && attribList[i]; i++) {
87 switch (attribList[i]) {
88 case WGL_CONTEXT_MAJOR_VERSION_ARB:
89 majorVersion = attribList[++i];
90 break;
91 case WGL_CONTEXT_MINOR_VERSION_ARB:
92 minorVersion = attribList[++i];
93 break;
94 case WGL_CONTEXT_LAYER_PLANE_ARB:
95 layerPlane = attribList[++i];
96 break;
97 case WGL_CONTEXT_FLAGS_ARB:
98 contextFlags = attribList[++i];
99 break;
100 case WGL_CONTEXT_PROFILE_MASK_ARB:
101 profileMask = attribList[++i];
102 break;
103 case 0:
104 /* end of list */
105 done = TRUE;
106 break;
107 default:
108 /* bad attribute */
109 SetLastError(ERROR_INVALID_PARAMETER);
110 return 0;
111 }
112 }
113 }
114
115 /* check contextFlags */
116 if (contextFlags & ~contextFlagsAll) {
117 SetLastError(ERROR_INVALID_PARAMETER);
118 return NULL;
119 }
120
121 /* check profileMask */
122 if (profileMask != WGL_CONTEXT_CORE_PROFILE_BIT_ARB &&
123 profileMask != WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB &&
124 profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT) {
125 SetLastError(ERROR_INVALID_PROFILE_ARB);
126 return NULL;
127 }
128
129 /* check version (generate ERROR_INVALID_VERSION_ARB if bad) */
130 if (majorVersion <= 0 ||
131 minorVersion < 0 ||
132 (profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
133 ((majorVersion == 1 && minorVersion > 5) ||
134 (majorVersion == 2 && minorVersion > 1) ||
135 (majorVersion == 3 && minorVersion > 3) ||
136 (majorVersion == 4 && minorVersion > 5) ||
137 majorVersion > 4)) ||
138 (profileMask == WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
139 ((majorVersion == 1 && minorVersion > 1) ||
140 (majorVersion == 2 && minorVersion > 0) ||
141 (majorVersion == 3 && minorVersion > 1) ||
142 majorVersion > 3))) {
143 SetLastError(ERROR_INVALID_VERSION_ARB);
144 return NULL;
145 }
146
147 if ((contextFlags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
148 majorVersion < 3) {
149 SetLastError(ERROR_INVALID_VERSION_ARB);
150 return 0;
151 }
152
153 /* Get pointer to OPENGL32.DLL's wglCreate/DeleteContext() functions */
154 if (!wglCreateContext_func || !wglDeleteContext_func) {
155 /* Get the OPENGL32.DLL library */
156 HMODULE opengl_lib = GetModuleHandleA("opengl32.dll");
157 if (!opengl_lib) {
158 _debug_printf("wgl: GetModuleHandleA(\"opengl32.dll\") failed\n");
159 return 0;
160 }
161
162 /* Get pointer to wglCreateContext() function */
163 wglCreateContext_func = (wglCreateContext_t)
164 GetProcAddress(opengl_lib, "wglCreateContext");
165 if (!wglCreateContext_func) {
166 _debug_printf("wgl: failed to get wglCreateContext()\n");
167 return 0;
168 }
169
170 /* Get pointer to wglDeleteContext() function */
171 wglDeleteContext_func = (wglDeleteContext_t)
172 GetProcAddress(opengl_lib, "wglDeleteContext");
173 if (!wglDeleteContext_func) {
174 _debug_printf("wgl: failed to get wglDeleteContext()\n");
175 return 0;
176 }
177 }
178
179 /* Call wglCreateContext to get a valid context ID */
180 context = wglCreateContext_func(hDC);
181
182 if (context) {
183 /* Now replace the context we just created with a new one that reflects
184 * the attributes passed to this function.
185 */
186 DHGLRC dhglrc, c, share_dhglrc = 0;
187
188 /* Convert public HGLRC to driver DHGLRC */
189 if (stw_dev && stw_dev->callbacks.pfnGetDhglrc) {
190 dhglrc = stw_dev->callbacks.pfnGetDhglrc(context);
191 if (hShareContext)
192 share_dhglrc = stw_dev->callbacks.pfnGetDhglrc(hShareContext);
193 }
194 else {
195 /* not using ICD */
196 dhglrc = (DHGLRC)(INT_PTR)context;
197 share_dhglrc = (DHGLRC)(INT_PTR)hShareContext;
198 }
199
200 struct stw_context *share_stw = stw_lookup_context(share_dhglrc);
201
202 struct stw_context *stw_ctx = stw_create_context_attribs(hDC, layerPlane, share_stw,
203 majorVersion, minorVersion,
204 contextFlags, profileMask, 0);
205
206 if (!stw_ctx) {
207 wglDeleteContext_func(context);
208 return 0;
209 }
210
211 c = stw_create_context_handle(stw_ctx, dhglrc);
212 if (!c) {
213 stw_destroy_context(stw_ctx);
214 wglDeleteContext_func(context);
215 context = 0;
216 }
217 }
218
219 return context;
220 }
221
222
223 /** Defined by WGL_ARB_make_current_read */
224 BOOL APIENTRY
wglMakeContextCurrentARB(HDC hDrawDC,HDC hReadDC,HGLRC hglrc)225 wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
226 {
227 DHGLRC dhglrc = 0;
228
229 if (stw_dev && stw_dev->callbacks.pfnGetDhglrc) {
230 /* Convert HGLRC to DHGLRC */
231 dhglrc = stw_dev->callbacks.pfnGetDhglrc(hglrc);
232 }
233
234 return stw_make_current_by_handles(hDrawDC, hReadDC, dhglrc);
235 }
236
237 HDC APIENTRY
wglGetCurrentReadDCARB(VOID)238 wglGetCurrentReadDCARB(VOID)
239 {
240 return stw_get_current_read_dc();
241 }
242