1 /*
2 ** Copyright 2007, The Android Open Source Project
3 **
4 ** Licensed under the Apache License, Version 2.0 (the "License");
5 ** you may not use this file except in compliance with the License.
6 ** You may obtain a copy of the License at
7 **
8 ** http://www.apache.org/licenses/LICENSE-2.0
9 **
10 ** Unless required by applicable law or agreed to in writing, software
11 ** distributed under the License is distributed on an "AS IS" BASIS,
12 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 ** See the License for the specific language governing permissions and
14 ** limitations under the License.
15 */
16
17 #include <ctype.h>
18 #include <string.h>
19 #include <errno.h>
20
21 #include <sys/ioctl.h>
22
23 #include <cutils/log.h>
24 #include <cutils/properties.h>
25
26 #include "../hooks.h"
27 #include "../egl_impl.h"
28
29 using namespace android;
30
31 // ----------------------------------------------------------------------------
32 // Actual GL entry-points
33 // ----------------------------------------------------------------------------
34
35 #undef API_ENTRY
36 #undef CALL_GL_API
37 #undef CALL_GL_API_RETURN
38
39 #if USE_SLOW_BINDING
40
41 #define API_ENTRY(_api) _api
42
43 #define CALL_GL_API(_api, ...) \
44 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
45 if (_c) return _c->_api(__VA_ARGS__);
46
47 #elif defined(__arm__)
48
49 #define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n"
50
51 #define API_ENTRY(_api) __attribute__((noinline)) _api
52
53 #define CALL_GL_API(_api, ...) \
54 asm volatile( \
55 GET_TLS(r12) \
56 "ldr r12, [r12, %[tls]] \n" \
57 "cmp r12, #0 \n" \
58 "ldrne pc, [r12, %[api]] \n" \
59 : \
60 : [tls] "J"(TLS_SLOT_OPENGL_API*4), \
61 [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \
62 : "r12" \
63 );
64
65 #elif defined(__aarch64__)
66
67 #define API_ENTRY(_api) __attribute__((noinline)) _api
68
69 #define CALL_GL_API(_api, ...) \
70 asm volatile( \
71 "mrs x16, tpidr_el0\n" \
72 "ldr x16, [x16, %[tls]]\n" \
73 "cbz x16, 1f\n" \
74 "ldr x16, [x16, %[api]]\n" \
75 "br x16\n" \
76 "1:\n" \
77 : \
78 : [tls] "i" (TLS_SLOT_OPENGL_API * sizeof(void*)), \
79 [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \
80 : "x16" \
81 );
82
83 #elif defined(__i386__)
84
85 #define API_ENTRY(_api) __attribute__((noinline,optimize("omit-frame-pointer"))) _api
86
87 #define CALL_GL_API(_api, ...) \
88 register void** fn; \
89 __asm__ volatile( \
90 "mov %%gs:0, %[fn]\n" \
91 "mov %P[tls](%[fn]), %[fn]\n" \
92 "test %[fn], %[fn]\n" \
93 "je 1f\n" \
94 "jmp *%P[api](%[fn])\n" \
95 "1:\n" \
96 : [fn] "=r" (fn) \
97 : [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)), \
98 [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \
99 : "cc" \
100 );
101
102 #elif defined(__x86_64__)
103
104 #define API_ENTRY(_api) __attribute__((noinline,optimize("omit-frame-pointer"))) _api
105
106 #define CALL_GL_API(_api, ...) \
107 register void** fn; \
108 __asm__ volatile( \
109 "mov %%fs:0, %[fn]\n" \
110 "mov %P[tls](%[fn]), %[fn]\n" \
111 "test %[fn], %[fn]\n" \
112 "je 1f\n" \
113 "jmp *%P[api](%[fn])\n" \
114 "1:\n" \
115 : [fn] "=r" (fn) \
116 : [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)), \
117 [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \
118 : "cc" \
119 );
120
121 #elif defined(__mips64)
122
123 #define API_ENTRY(_api) __attribute__((noinline)) _api
124
125 #define CALL_GL_API(_api, ...) \
126 register unsigned long _t0 asm("$12"); \
127 register unsigned long _fn asm("$25"); \
128 register unsigned long _tls asm("$3"); \
129 register unsigned long _v0 asm("$2"); \
130 asm volatile( \
131 ".set push\n\t" \
132 ".set noreorder\n\t" \
133 "rdhwr %[tls], $29\n\t" \
134 "ld %[t0], %[OPENGL_API](%[tls])\n\t" \
135 "beqz %[t0], 1f\n\t" \
136 " move %[fn], $ra\n\t" \
137 "ld %[t0], %[API](%[t0])\n\t" \
138 "beqz %[t0], 1f\n\t" \
139 " nop\n\t" \
140 "move %[fn], %[t0]\n\t" \
141 "1:\n\t" \
142 "jalr $0, %[fn]\n\t" \
143 " move %[v0], $0\n\t" \
144 ".set pop\n\t" \
145 : [fn] "=c"(_fn), \
146 [tls] "=&r"(_tls), \
147 [t0] "=&r"(_t0), \
148 [v0] "=&r"(_v0) \
149 : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*sizeof(void*)),\
150 [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \
151 : \
152 );
153
154 #elif defined(__mips__)
155
156 #define API_ENTRY(_api) __attribute__((noinline)) _api
157
158 #define CALL_GL_API(_api, ...) \
159 register unsigned int _t0 asm("$8"); \
160 register unsigned int _fn asm("$25"); \
161 register unsigned int _tls asm("$3"); \
162 register unsigned int _v0 asm("$2"); \
163 asm volatile( \
164 ".set push\n\t" \
165 ".set noreorder\n\t" \
166 ".set mips32r2\n\t" \
167 "rdhwr %[tls], $29\n\t" \
168 "lw %[t0], %[OPENGL_API](%[tls])\n\t" \
169 "beqz %[t0], 1f\n\t" \
170 " move %[fn],$ra\n\t" \
171 "lw %[t0], %[API](%[t0])\n\t" \
172 "beqz %[t0], 1f\n\t" \
173 " nop\n\t" \
174 "move %[fn], %[t0]\n\t" \
175 "1:\n\t" \
176 "jalr $0, %[fn]\n\t" \
177 " move %[v0], $0\n\t" \
178 ".set pop\n\t" \
179 : [fn] "=c"(_fn), \
180 [tls] "=&r"(_tls), \
181 [t0] "=&r"(_t0), \
182 [v0] "=&r"(_v0) \
183 : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4), \
184 [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \
185 : \
186 );
187
188 #endif
189
190 #define CALL_GL_API_RETURN(_api, ...) \
191 CALL_GL_API(_api, __VA_ARGS__) \
192 return 0;
193
194
195
196 extern "C" {
197 #pragma GCC diagnostic ignored "-Wunused-parameter"
198 #include "gl2_api.in"
199 #include "gl2ext_api.in"
200 #pragma GCC diagnostic warning "-Wunused-parameter"
201 }
202
203 #undef API_ENTRY
204 #undef CALL_GL_API
205 #undef CALL_GL_API_RETURN
206
207 /*
208 * glGetString() and glGetStringi() are special because we expose some
209 * extensions in the wrapper. Also, wrapping glGetXXX() is required because
210 * the value returned for GL_NUM_EXTENSIONS may have been altered by the
211 * injection of the additional extensions.
212 */
213
214 extern "C" {
215 const GLubyte * __glGetString(GLenum name);
216 const GLubyte * __glGetStringi(GLenum name, GLuint index);
217 void __glGetBooleanv(GLenum pname, GLboolean * data);
218 void __glGetFloatv(GLenum pname, GLfloat * data);
219 void __glGetIntegerv(GLenum pname, GLint * data);
220 void __glGetInteger64v(GLenum pname, GLint64 * data);
221 }
222
glGetString(GLenum name)223 const GLubyte * glGetString(GLenum name) {
224 const GLubyte * ret = egl_get_string_for_current_context(name);
225 if (ret == NULL) {
226 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
227 if(_c) ret = _c->glGetString(name);
228 }
229 return ret;
230 }
231
glGetStringi(GLenum name,GLuint index)232 const GLubyte * glGetStringi(GLenum name, GLuint index) {
233 const GLubyte * ret = egl_get_string_for_current_context(name, index);
234 if (ret == NULL) {
235 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
236 if(_c) ret = _c->glGetStringi(name, index);
237 }
238 return ret;
239 }
240
glGetBooleanv(GLenum pname,GLboolean * data)241 void glGetBooleanv(GLenum pname, GLboolean * data) {
242 if (pname == GL_NUM_EXTENSIONS) {
243 int num_exts = egl_get_num_extensions_for_current_context();
244 if (num_exts >= 0) {
245 *data = num_exts > 0 ? GL_TRUE : GL_FALSE;
246 return;
247 }
248 }
249
250 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
251 if (_c) _c->glGetBooleanv(pname, data);
252 }
253
glGetFloatv(GLenum pname,GLfloat * data)254 void glGetFloatv(GLenum pname, GLfloat * data) {
255 if (pname == GL_NUM_EXTENSIONS) {
256 int num_exts = egl_get_num_extensions_for_current_context();
257 if (num_exts >= 0) {
258 *data = (GLfloat)num_exts;
259 return;
260 }
261 }
262
263 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
264 if (_c) _c->glGetFloatv(pname, data);
265 }
266
glGetIntegerv(GLenum pname,GLint * data)267 void glGetIntegerv(GLenum pname, GLint * data) {
268 if (pname == GL_NUM_EXTENSIONS) {
269 int num_exts = egl_get_num_extensions_for_current_context();
270 if (num_exts >= 0) {
271 *data = (GLint)num_exts;
272 return;
273 }
274 }
275
276 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
277 if (_c) _c->glGetIntegerv(pname, data);
278 }
279
glGetInteger64v(GLenum pname,GLint64 * data)280 void glGetInteger64v(GLenum pname, GLint64 * data) {
281 if (pname == GL_NUM_EXTENSIONS) {
282 int num_exts = egl_get_num_extensions_for_current_context();
283 if (num_exts >= 0) {
284 *data = (GLint64)num_exts;
285 return;
286 }
287 }
288
289 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
290 if (_c) _c->glGetInteger64v(pname, data);
291 }
292