apple_glx.c revision 7d215e7c4d0ca8a18d91d4f30f79b97835a6d6c4 
1/*
2 Copyright (c) 2008, 2009 Apple Inc.
3
4 Permission is hereby granted, free of charge, to any person
5 obtaining a copy of this software and associated documentation files
6 (the "Software"), to deal in the Software without restriction,
7 including without limitation the rights to use, copy, modify, merge,
8 publish, distribute, sublicense, and/or sell copies of the Software,
9 and to permit persons to whom the Software is furnished to do so,
10 subject to the following conditions:
11
12 The above copyright notice and this permission notice shall be
13 included in all copies or substantial portions of the Software.
14
15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 NONINFRINGEMENT.  IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
19 HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 DEALINGS IN THE SOFTWARE.
23
24 Except as contained in this notice, the name(s) of the above
25 copyright holders shall not be used in advertising or otherwise to
26 promote the sale, use or other dealings in this Software without
27 prior written authorization.
28*/
29
30#include <stdio.h>
31#include <stdlib.h>
32#include <string.h>
33#include <assert.h>
34#include <stdarg.h>
35#include <dlfcn.h>
36#include "appledri.h"
37#include "apple_glx.h"
38#include "apple_glx_context.h"
39#include "apple_cgl.h"
40
41static bool initialized = false;
42static int dri_event_base = 0;
43
44const GLuint __glXDefaultPixelStore[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 1 };
45
46#ifndef OPENGL_LIB_PATH
47#define OPENGL_LIB_PATH "/System/Library/Frameworks/OpenGL.framework/Libraries/libGL.dylib"
48#endif
49
50static void *libgl_handle = NULL;
51
52static bool diagnostic = false;
53
54void
55apple_glx_diagnostic(const char *fmt, ...)
56{
57   va_list vl;
58
59   if (diagnostic) {
60      fprintf(stderr, "DIAG: ");
61
62      va_start(vl, fmt);
63      vfprintf(stderr, fmt, vl);
64      va_end(vl);
65   }
66}
67
68int
69apple_get_dri_event_base(void)
70{
71   if (!initialized) {
72      fprintf(stderr,
73              "error: dri_event_base called before apple_init_glx!\n");
74      abort();
75   }
76   return dri_event_base;
77}
78
79static void
80surface_notify_handler(Display * dpy, unsigned int uid, int kind)
81{
82
83   switch (kind) {
84   case AppleDRISurfaceNotifyDestroyed:
85      apple_glx_diagnostic("%s: surface destroyed %u\n", __func__, uid);
86      apple_glx_surface_destroy(uid);
87      break;
88
89   case AppleDRISurfaceNotifyChanged:{
90         int updated;
91
92         updated = apple_glx_context_surface_changed(uid, pthread_self());
93
94         apple_glx_diagnostic("surface notify updated %d\n", updated);
95      }
96      break;
97
98   default:
99      fprintf(stderr, "unhandled kind of event: %d in %s\n", kind, __func__);
100   }
101}
102
103xp_client_id
104apple_glx_get_client_id(void)
105{
106   static xp_client_id id;
107
108   if (0 == id) {
109      if ((XP_Success != xp_init(XP_IN_BACKGROUND)) ||
110          (Success != xp_get_client_id(&id))) {
111         return 0;
112      }
113   }
114
115   return id;
116}
117
118/* Return true if an error occured. */
119bool
120apple_init_glx(Display * dpy)
121{
122   int eventBase, errorBase;
123   int major, minor, patch;
124
125   if (!XAppleDRIQueryExtension(dpy, &eventBase, &errorBase))
126      return true;
127
128   if (!XAppleDRIQueryVersion(dpy, &major, &minor, &patch))
129      return true;
130
131   if (initialized)
132      return false;
133
134   if (getenv("LIBGL_DIAGNOSTIC")) {
135      printf("initializing libGL in %s\n", __func__);
136      diagnostic = true;
137   }
138
139   apple_cgl_init();
140   apple_xgl_init_direct();
141   libgl_handle = dlopen(OPENGL_LIB_PATH, RTLD_LAZY);
142   (void) apple_glx_get_client_id();
143
144   XAppleDRISetSurfaceNotifyHandler(surface_notify_handler);
145
146   /* This should really be per display. */
147   dri_event_base = eventBase;
148   initialized = true;
149
150   return false;
151}
152
153void
154apple_glx_swap_buffers(void *ptr)
155{
156   struct apple_glx_context *ac = ptr;
157
158   /* This may not be needed with CGLFlushDrawable: */
159   glFlush();
160   apple_cgl.flush_drawable(ac->context_obj);
161}
162
163void *
164apple_glx_get_proc_address(const GLubyte * procname)
165{
166   size_t len;
167   void *h, *s;
168   char *pname = (char *) procname;
169
170   assert(NULL != procname);
171   len = strlen(pname);
172
173   if (len < 3) {
174      return NULL;
175   }
176
177   if ((pname != strstr(pname, "glX")) && (pname != strstr(pname, "gl"))) {
178      fprintf(stderr,
179              "warning: get proc address request is not for a gl or glX function");
180      return NULL;
181   }
182
183   /* Search using the default symbols first. */
184   (void) dlerror();            /*drain dlerror */
185   h = dlopen(NULL, RTLD_NOW);
186   if (NULL == h) {
187      fprintf(stderr, "warning: get proc address: %s\n", dlerror());
188      return NULL;
189   }
190
191   s = dlsym(h, pname);
192
193   if (NULL == s) {
194      /* Try the libGL.dylib from the OpenGL.framework. */
195      s = dlsym(libgl_handle, pname);
196   }
197
198   dlclose(h);
199
200   return s;
201}
202
203void
204apple_glx_waitx(Display * dpy, void *ptr)
205{
206   struct apple_private_context *ac = ptr;
207
208   (void) ac;
209
210   glFlush();
211   glFinish();
212   XSync(dpy, False);
213}
214