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 "stw_icd.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 wglCreateContext_t wglCreateContext_func = 0;
42 wglDeleteContext_t wglDeleteContext_func = 0;
43
44
45 /**
46 * The implementation of this function is tricky. The OPENGL32.DLL library
47 * remaps the context IDs returned by our stw_create_context_attribs()
48 * function to different values returned to the caller of wglCreateContext().
49 * That is, DHGLRC (driver) handles are not equivalent to HGLRC (public)
50 * handles.
51 *
52 * So we need to generate a new HGLRC ID here. We do that by calling
53 * the regular wglCreateContext() function. Then, we replace the newly-
54 * created stw_context with a new stw_context that reflects the arguments
55 * to this function.
56 */
57 HGLRC WINAPI
wglCreateContextAttribsARB(HDC hDC,HGLRC hShareContext,const int * attribList)58 wglCreateContextAttribsARB(HDC hDC, HGLRC hShareContext, const int *attribList)
59 {
60 HGLRC context;
61
62 int majorVersion = 1, minorVersion = 0, layerPlane = 0;
63 int contextFlags = 0x0;
64 int profileMask = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
65 int i;
66 BOOL done = FALSE;
67 const int contextFlagsAll = (WGL_CONTEXT_DEBUG_BIT_ARB |
68 WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB);
69
70 /* parse attrib_list */
71 if (attribList) {
72 for (i = 0; !done && attribList[i]; i++) {
73 switch (attribList[i]) {
74 case WGL_CONTEXT_MAJOR_VERSION_ARB:
75 majorVersion = attribList[++i];
76 break;
77 case WGL_CONTEXT_MINOR_VERSION_ARB:
78 minorVersion = attribList[++i];
79 break;
80 case WGL_CONTEXT_LAYER_PLANE_ARB:
81 layerPlane = attribList[++i];
82 break;
83 case WGL_CONTEXT_FLAGS_ARB:
84 contextFlags = attribList[++i];
85 break;
86 case WGL_CONTEXT_PROFILE_MASK_ARB:
87 profileMask = attribList[++i];
88 break;
89 case 0:
90 /* end of list */
91 done = TRUE;
92 break;
93 default:
94 /* bad attribute */
95 SetLastError(ERROR_INVALID_PARAMETER);
96 return 0;
97 }
98 }
99 }
100
101 /* check contextFlags */
102 if (contextFlags & ~contextFlagsAll) {
103 SetLastError(ERROR_INVALID_PARAMETER);
104 return NULL;
105 }
106
107 /* check profileMask */
108 if (profileMask != WGL_CONTEXT_CORE_PROFILE_BIT_ARB &&
109 profileMask != WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB &&
110 profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT) {
111 SetLastError(ERROR_INVALID_PROFILE_ARB);
112 return NULL;
113 }
114
115 /* check version (generate ERROR_INVALID_VERSION_ARB if bad) */
116 if (majorVersion <= 0 ||
117 minorVersion < 0 ||
118 (profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
119 ((majorVersion == 1 && minorVersion > 5) ||
120 (majorVersion == 2 && minorVersion > 1) ||
121 (majorVersion == 3 && minorVersion > 3) ||
122 (majorVersion == 4 && minorVersion > 5) ||
123 majorVersion > 4)) ||
124 (profileMask == WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
125 ((majorVersion == 1 && minorVersion > 1) ||
126 (majorVersion == 2 && minorVersion > 0) ||
127 (majorVersion == 3 && minorVersion > 1) ||
128 majorVersion > 3))) {
129 SetLastError(ERROR_INVALID_VERSION_ARB);
130 return NULL;
131 }
132
133 if ((contextFlags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
134 majorVersion < 3) {
135 SetLastError(ERROR_INVALID_VERSION_ARB);
136 return 0;
137 }
138
139 /* Get pointer to OPENGL32.DLL's wglCreate/DeleteContext() functions */
140 if (!wglCreateContext_func || !wglDeleteContext_func) {
141 /* Get the OPENGL32.DLL library */
142 HMODULE opengl_lib = GetModuleHandleA("opengl32.dll");
143 if (!opengl_lib) {
144 _debug_printf("wgl: GetModuleHandleA(\"opengl32.dll\") failed\n");
145 return 0;
146 }
147
148 /* Get pointer to wglCreateContext() function */
149 wglCreateContext_func = (wglCreateContext_t)
150 GetProcAddress(opengl_lib, "wglCreateContext");
151 if (!wglCreateContext_func) {
152 _debug_printf("wgl: failed to get wglCreateContext()\n");
153 return 0;
154 }
155
156 /* Get pointer to wglDeleteContext() function */
157 wglDeleteContext_func = (wglDeleteContext_t)
158 GetProcAddress(opengl_lib, "wglDeleteContext");
159 if (!wglDeleteContext_func) {
160 _debug_printf("wgl: failed to get wglDeleteContext()\n");
161 return 0;
162 }
163 }
164
165 /* Call wglCreateContext to get a valid context ID */
166 context = wglCreateContext_func(hDC);
167
168 if (context) {
169 /* Now replace the context we just created with a new one that reflects
170 * the attributes passed to this function.
171 */
172 DHGLRC dhglrc, c, share_dhglrc = 0;
173
174 /* Convert public HGLRC to driver DHGLRC */
175 if (stw_dev && stw_dev->callbacks.wglCbGetDhglrc) {
176 dhglrc = stw_dev->callbacks.wglCbGetDhglrc(context);
177 if (hShareContext)
178 share_dhglrc = stw_dev->callbacks.wglCbGetDhglrc(hShareContext);
179 }
180 else {
181 /* not using ICD */
182 dhglrc = (DHGLRC) context;
183 share_dhglrc = (DHGLRC) hShareContext;
184 }
185
186 c = stw_create_context_attribs(hDC, layerPlane, share_dhglrc,
187 majorVersion, minorVersion,
188 contextFlags, profileMask,
189 dhglrc);
190 if (!c) {
191 wglDeleteContext_func(context);
192 context = 0;
193 }
194 }
195
196 return context;
197 }
198
199
200 /** Defined by WGL_ARB_make_current_read */
201 BOOL APIENTRY
wglMakeContextCurrentARB(HDC hDrawDC,HDC hReadDC,HGLRC hglrc)202 wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
203 {
204 DHGLRC dhglrc = 0;
205
206 if (stw_dev && stw_dev->callbacks.wglCbGetDhglrc) {
207 /* Convert HGLRC to DHGLRC */
208 dhglrc = stw_dev->callbacks.wglCbGetDhglrc(hglrc);
209 }
210
211 return stw_make_current(hDrawDC, hReadDC, dhglrc);
212 }
213