1 /* Copyright © 2013, Intel Corporation
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
35 open_libgl_handle (void)
37 const char *libgl_path;
42 libgl_path = getenv ("GLAZE_LIBGL");
44 if (libgl_path == NULL) {
47 libgl_path = getenv ("GLAZE_LIBGL_32_AUTO");
48 #elif GLAZE_BITS == 64
49 libgl_path = getenv ("GLAZE_LIBGL_64_AUTO");
52 if (libgl_path == NULL) {
54 "Error: Failed to detect OpenGL library.\n"
55 "Please set GLAZE_LIBGL to path of real libGL.so\n");
59 setenv ("GLAZE_LIBGL", libgl_path, 1);
63 libgl_handle = dlopen (libgl_path, RTLD_LAZY | RTLD_GLOBAL);
64 if (libgl_handle == NULL) {
65 fprintf (stderr, "glaze_init: Error: Failed to dlopen %s: %s\n",
66 libgl_path, dlerror());
72 open_wrapper_handle (void)
79 path = getenv ("GLAZE_WRAPPER");
81 fprintf (stderr, "GLAZE_WRAPPER unset. Please set to path of real libGL.so under glaze.\n");
86 wrapper_handle = dlopen (path, RTLD_LAZY);
87 if (wrapper_handle == NULL) {
88 const char *error = dlerror();
89 fprintf (stderr, "Error: Failed to dlopen %s: %s\n", path, error);
95 glaze_init (void) __attribute__((constructor));
100 open_libgl_handle ();
101 open_wrapper_handle ();
105 resolve (const char *name)
109 /* The wrapper gets first choice on all symbols. */
110 symbol = dlsym (wrapper_handle, name);
114 return dlsym (libgl_handle, name);
117 #define GLAZE_API(name) \
118 void * name() __attribute__((ifunc(#name "_resolver"))); \
120 name ## _resolver (void) { return resolve (#name); }
122 #include "specs/gl.def"
123 #include "specs/glx.def"