1/*
2 * Copyright © 2013 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24#include "config.h"
25
26#ifdef _WIN32
27#define PLATFORM_HAS_EGL ENABLE_EGL
28#define PLATFORM_HAS_GLX ENABLE_GLX
29#define PLATFORM_HAS_WGL 1
30#elif defined(__APPLE__)
31#define PLATFORM_HAS_EGL 0
32#define PLATFORM_HAS_GLX ENABLE_GLX
33#define PLATFORM_HAS_WGL 0
34#elif defined(ANDROID)
35#define PLATFORM_HAS_EGL ENABLE_EGL
36#define PLATFORM_HAS_GLX 0
37#define PLATFORM_HAS_WGL 0
38#else
39#define PLATFORM_HAS_EGL ENABLE_EGL
40#define PLATFORM_HAS_GLX ENABLE_GLX
41#define PLATFORM_HAS_WGL 0
42#endif
43
44#include "epoxy/gl.h"
45#if PLATFORM_HAS_GLX
46#include "epoxy/glx.h"
47#endif
48#if PLATFORM_HAS_EGL
49# if !ENABLE_X11
50/* Disable including X11 headers if the X11 support was disabled at
51 * configuration time
52 */
53# define EGL_NO_X11 1
54/* Older versions of Mesa use this symbol to achieve the same result
55 * as EGL_NO_X11
56 */
57# define MESA_EGL_NO_X11_HEADERS 1
58# endif
59#include "epoxy/egl.h"
60#endif
61#if PLATFORM_HAS_WGL
62#include "epoxy/wgl.h"
63#endif
64
65#if defined(__GNUC__)
66#define PACKED __attribute__((__packed__))
67#define ENDPACKED
68#elif defined (_MSC_VER)
69#define PACKED __pragma(pack(push,1))
70#define ENDPACKED __pragma(pack(pop))
71#else
72#define PACKED
73#define ENDPACKED
74#endif
75
76/* On win32, we're going to need to keep a per-thread dispatch table,
77 * since the function pointers depend on the device and pixel format
78 * of the current context.
79 */
80#if defined(_WIN32)
81#define USING_DISPATCH_TABLE 1
82#else
83#define USING_DISPATCH_TABLE 0
84#endif
85
86#define UNWRAPPED_PROTO(x) (GLAPIENTRY *x)
87#define WRAPPER_VISIBILITY(type) static type GLAPIENTRY
88#define WRAPPER(x) x ## _wrapped
89
90#define GEN_GLOBAL_REWRITE_PTR(name, args, passthrough) \
91 static void EPOXY_CALLSPEC \
92 name##_global_rewrite_ptr args \
93 { \
94 if (name == (void *)name##_global_rewrite_ptr) \
95 name = (void *)name##_resolver(); \
96 name passthrough; \
97 }
98
99#define GEN_GLOBAL_REWRITE_PTR_RET(ret, name, args, passthrough) \
100 static ret EPOXY_CALLSPEC \
101 name##_global_rewrite_ptr args \
102 { \
103 if (name == (void *)name##_global_rewrite_ptr) \
104 name = (void *)name##_resolver(); \
105 return name passthrough; \
106 }
107
108#if USING_DISPATCH_TABLE
109#define GEN_DISPATCH_TABLE_REWRITE_PTR(name, args, passthrough) \
110 static void EPOXY_CALLSPEC \
111 name##_dispatch_table_rewrite_ptr args \
112 { \
113 struct dispatch_table *dispatch_table = get_dispatch_table(); \
114 \
115 dispatch_table->name = (void *)name##_resolver(); \
116 dispatch_table->name passthrough; \
117 }
118
119#define GEN_DISPATCH_TABLE_REWRITE_PTR_RET(ret, name, args, passthrough) \
120 static ret EPOXY_CALLSPEC \
121 name##_dispatch_table_rewrite_ptr args \
122 { \
123 struct dispatch_table *dispatch_table = get_dispatch_table(); \
124 \
125 dispatch_table->name = (void *)name##_resolver(); \
126 return dispatch_table->name passthrough; \
127 }
128
129#define GEN_DISPATCH_TABLE_THUNK(name, args, passthrough) \
130 static void EPOXY_CALLSPEC \
131 name##_dispatch_table_thunk args \
132 { \
133 get_dispatch_table()->name passthrough; \
134 }
135
136#define GEN_DISPATCH_TABLE_THUNK_RET(ret, name, args, passthrough) \
137 static ret EPOXY_CALLSPEC \
138 name##_dispatch_table_thunk args \
139 { \
140 return get_dispatch_table()->name passthrough; \
141 }
142
143#else
144#define GEN_DISPATCH_TABLE_REWRITE_PTR(name, args, passthrough)
145#define GEN_DISPATCH_TABLE_REWRITE_PTR_RET(ret, name, args, passthrough)
146#define GEN_DISPATCH_TABLE_THUNK(name, args, passthrough)
147#define GEN_DISPATCH_TABLE_THUNK_RET(ret, name, args, passthrough)
148#endif
149
150#define GEN_THUNKS(name, args, passthrough) \
151 GEN_GLOBAL_REWRITE_PTR(name, args, passthrough) \
152 GEN_DISPATCH_TABLE_REWRITE_PTR(name, args, passthrough) \
153 GEN_DISPATCH_TABLE_THUNK(name, args, passthrough)
154
155#define GEN_THUNKS_RET(ret, name, args, passthrough) \
156 GEN_GLOBAL_REWRITE_PTR_RET(ret, name, args, passthrough) \
157 GEN_DISPATCH_TABLE_REWRITE_PTR_RET(ret, name, args, passthrough) \
158 GEN_DISPATCH_TABLE_THUNK_RET(ret, name, args, passthrough)
159
160void *epoxy_egl_dlsym(const char *name);
161void *epoxy_glx_dlsym(const char *name);
162void *epoxy_gl_dlsym(const char *name);
163void *epoxy_gles1_dlsym(const char *name);
164void *epoxy_gles2_dlsym(const char *name);
165void *epoxy_gles3_dlsym(const char *name);
166void *epoxy_get_proc_address(const char *name);
167void *epoxy_get_core_proc_address(const char *name, int core_version);
168void *epoxy_get_bootstrap_proc_address(const char *name);
169
170int epoxy_conservative_gl_version(void);
171bool epoxy_conservative_has_gl_extension(const char *name);
172int epoxy_conservative_glx_version(void);
173bool epoxy_conservative_has_glx_extension(const char *name);
174int epoxy_conservative_egl_version(void);
175bool epoxy_conservative_has_egl_extension(const char *name);
176bool epoxy_conservative_has_wgl_extension(const char *name);
177void *epoxy_conservative_egl_dlsym(const char *name, bool exit_if_fails);
178void *epoxy_conservative_glx_dlsym(const char *name, bool exit_if_fails);
179
180bool epoxy_load_glx(bool exit_if_fails, bool load);
181bool epoxy_load_egl(bool exit_if_fails, bool load);
182
183#define glBegin_unwrapped epoxy_glBegin_unwrapped
184#define glEnd_unwrapped epoxy_glEnd_unwrapped
185extern void UNWRAPPED_PROTO(glBegin_unwrapped)(GLenum primtype);
186extern void UNWRAPPED_PROTO(glEnd_unwrapped)(void);
187
188extern epoxy_resolver_failure_handler_t epoxy_resolver_failure_handler;
189
190#if USING_DISPATCH_TABLE
191void gl_init_dispatch_table(void);
192void gl_switch_to_dispatch_table(void);
193void wgl_init_dispatch_table(void);
194void wgl_switch_to_dispatch_table(void);
195extern uint32_t gl_tls_index, gl_tls_size;
196extern uint32_t wgl_tls_index, wgl_tls_size;
197
198#define wglMakeCurrent_unwrapped epoxy_wglMakeCurrent_unwrapped
199#define wglMakeContextCurrentARB_unwrapped epoxy_wglMakeContextCurrentARB_unwrapped
200#define wglMakeContextCurrentEXT_unwrapped epoxy_wglMakeContextCurrentEXT_unwrapped
201#define wglMakeAssociatedContextCurrentAMD_unwrapped epoxy_wglMakeAssociatedContextCurrentAMD_unwrapped
202extern BOOL UNWRAPPED_PROTO(wglMakeCurrent_unwrapped)(HDC hdc, HGLRC hglrc);
203extern BOOL UNWRAPPED_PROTO(wglMakeContextCurrentARB_unwrapped)(HDC hDrawDC, HDC hReadDC, HGLRC hglrc);
204extern BOOL UNWRAPPED_PROTO(wglMakeContextCurrentEXT_unwrapped)(HDC hDrawDC, HDC hReadDC, HGLRC hglrc);
205extern BOOL UNWRAPPED_PROTO(wglMakeAssociatedContextCurrentAMD_unwrapped)(HGLRC hglrc);
206#endif /* _WIN32_ */
207

source code of gtk/subprojects/libepoxy/src/dispatch_common.h