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 <errno.h>
19 #include <string.h>
20 #include <sys/ioctl.h>
21
22 #include <log/log.h>
23 #include <cutils/properties.h>
24
25 #include <GLES/gl.h>
26 #include <GLES/glext.h>
27
28 #include "../hooks.h"
29 #include "../egl_impl.h"
30
31 using namespace android;
32
33 // ----------------------------------------------------------------------------
34 // extensions for the framework
35 // ----------------------------------------------------------------------------
36
37 extern "C" {
38 GL_API void GL_APIENTRY glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
39 const GLvoid *ptr, GLsizei count);
40 GL_API void GL_APIENTRY glNormalPointerBounds(GLenum type, GLsizei stride,
41 const GLvoid *pointer, GLsizei count);
42 GL_API void GL_APIENTRY glTexCoordPointerBounds(GLint size, GLenum type,
43 GLsizei stride, const GLvoid *pointer, GLsizei count);
44 GL_API void GL_APIENTRY glVertexPointerBounds(GLint size, GLenum type,
45 GLsizei stride, const GLvoid *pointer, GLsizei count);
46 GL_API void GL_APIENTRY glPointSizePointerOESBounds(GLenum type,
47 GLsizei stride, const GLvoid *pointer, GLsizei count);
48 GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type,
49 GLsizei stride, const GLvoid *pointer, GLsizei count);
50 GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type,
51 GLsizei stride, const GLvoid *pointer, GLsizei count);
52 }
53
glColorPointerBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * ptr,GLsizei)54 void glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
55 const GLvoid *ptr, GLsizei /*count*/) {
56 glColorPointer(size, type, stride, ptr);
57 }
glNormalPointerBounds(GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei)58 void glNormalPointerBounds(GLenum type, GLsizei stride,
59 const GLvoid *pointer, GLsizei /*count*/) {
60 glNormalPointer(type, stride, pointer);
61 }
glTexCoordPointerBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei)62 void glTexCoordPointerBounds(GLint size, GLenum type,
63 GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
64 glTexCoordPointer(size, type, stride, pointer);
65 }
glVertexPointerBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei)66 void glVertexPointerBounds(GLint size, GLenum type,
67 GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
68 glVertexPointer(size, type, stride, pointer);
69 }
70
glPointSizePointerOESBounds(GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei)71 void GL_APIENTRY glPointSizePointerOESBounds(GLenum type,
72 GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
73 glPointSizePointerOES(type, stride, pointer);
74 }
75
glMatrixIndexPointerOESBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei)76 GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type,
77 GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
78 glMatrixIndexPointerOES(size, type, stride, pointer);
79 }
80
glWeightPointerOESBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei)81 GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type,
82 GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
83 glWeightPointerOES(size, type, stride, pointer);
84 }
85
86 // ----------------------------------------------------------------------------
87 // Actual GL entry-points
88 // ----------------------------------------------------------------------------
89
90 #undef API_ENTRY
91 #undef CALL_GL_API
92 #undef CALL_GL_API_INTERNAL_CALL
93 #undef CALL_GL_API_INTERNAL_SET_RETURN_VALUE
94 #undef CALL_GL_API_INTERNAL_DO_RETURN
95 #undef CALL_GL_API_RETURN
96
97 #if USE_SLOW_BINDING
98
99 #define API_ENTRY(_api) _api
100
101 #define CALL_GL_API_INTERNAL_CALL(_api, ...) \
102 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
103 if (_c) return _c->_api(__VA_ARGS__);
104
105 #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE return 0;
106
107 // This stays blank, since void functions will implicitly return, and
108 // all of the other functions will return 0 based on the previous macro.
109 #define CALL_GL_API_INTERNAL_DO_RETURN
110
111 #elif defined(__arm__)
112
113 #define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n"
114
115 #define API_ENTRY(_api) __attribute__((naked,noinline)) _api
116
117 #define CALL_GL_API_INTERNAL_CALL(_api, ...) \
118 asm volatile( \
119 GET_TLS(r12) \
120 "ldr r12, [r12, %[tls]] \n" \
121 "cmp r12, #0 \n" \
122 "ldrne pc, [r12, %[api]] \n" \
123 : \
124 : [tls] "J"(TLS_SLOT_OPENGL_API*4), \
125 [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \
126 : "r0", "r1", "r2", "r3", "r12" \
127 );
128
129 #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
130 asm volatile( \
131 "mov r0, #0 \n" \
132 : \
133 : \
134 : "r0" \
135 );
136
137
138 #define CALL_GL_API_INTERNAL_DO_RETURN \
139 asm volatile( \
140 "bx lr \n" \
141 : \
142 : \
143 : "r0" \
144 );
145
146 #elif defined(__aarch64__)
147
148 #define API_ENTRY(_api) __attribute__((naked,noinline)) _api
149
150 #define CALL_GL_API_INTERNAL_CALL(_api, ...) \
151 asm volatile( \
152 "mrs x16, tpidr_el0\n" \
153 "ldr x16, [x16, %[tls]]\n" \
154 "cbz x16, 1f\n" \
155 "ldr x16, [x16, %[api]]\n" \
156 "br x16\n" \
157 "1:\n" \
158 : \
159 : [tls] "i" (TLS_SLOT_OPENGL_API * sizeof(void*)), \
160 [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \
161 : "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", "x16" \
162 );
163
164 #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
165 asm volatile( \
166 "mov w0, wzr \n" \
167 : \
168 : \
169 : "w0" \
170 );
171
172 #define CALL_GL_API_INTERNAL_DO_RETURN \
173 asm volatile( \
174 "ret \n" \
175 : \
176 : \
177 : \
178 );
179
180 #elif defined(__i386__)
181
182 #define API_ENTRY(_api) __attribute__((naked,noinline)) _api
183
184 #define CALL_GL_API_INTERNAL_CALL(_api, ...) \
185 __asm__ volatile( \
186 "mov %%gs:0, %%eax\n" \
187 "mov %P[tls](%%eax), %%eax\n" \
188 "test %%eax, %%eax\n" \
189 "je 1f\n" \
190 "jmp *%P[api](%%eax)\n" \
191 "1:\n" \
192 : \
193 : [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)), \
194 [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \
195 : "cc", "%eax" \
196 );
197
198 #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
199 __asm__ volatile( \
200 "xor %%eax, %%eax\n" \
201 : \
202 : \
203 : "%eax" \
204 );
205
206 #define CALL_GL_API_INTERNAL_DO_RETURN \
207 __asm__ volatile( \
208 "ret\n" \
209 : \
210 : \
211 : \
212 );
213
214 #elif defined(__x86_64__)
215
216 #define API_ENTRY(_api) __attribute__((naked,noinline)) _api
217
218 #define CALL_GL_API_INTERNAL_CALL(_api, ...) \
219 __asm__ volatile( \
220 "mov %%fs:0, %%rax\n" \
221 "mov %P[tls](%%rax), %%rax\n" \
222 "test %%rax, %%rax\n" \
223 "je 1f\n" \
224 "jmp *%P[api](%%rax)\n" \
225 "1:\n" \
226 : \
227 : [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)), \
228 [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \
229 : "cc", "%rdi", "%rsi", "%rdx", "%rcx", "%r8", "%r9", \
230 "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", \
231 "%xmm6", "%xmm7" \
232 );
233
234 #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
235 __asm__ volatile( \
236 "xor %%eax, %%eax\n" \
237 : \
238 : \
239 : "%eax" \
240 );
241
242 #define CALL_GL_API_INTERNAL_DO_RETURN \
243 __asm__ volatile( \
244 "retq\n" \
245 : \
246 : \
247 : \
248 );
249
250 #elif defined(__mips64)
251
252 #define API_ENTRY(_api) __attribute__((naked,noinline)) _api
253
254 // t0: $12
255 // fn: $25
256 // tls: $3
257 // v0: $2
258 #define CALL_GL_API_INTERNAL_CALL(_api, ...) \
259 asm volatile( \
260 ".set push\n\t" \
261 ".set noreorder\n\t" \
262 "rdhwr $3, $29\n\t" \
263 "ld $12, %[OPENGL_API]($3)\n\t" \
264 "beqz $12, 1f\n\t" \
265 " move $25, $ra\n\t" \
266 "ld $12, %[API]($12)\n\t" \
267 "beqz $12, 1f\n\t" \
268 " nop\n\t" \
269 "move $25, $12\n\t" \
270 "1:\n\t" \
271 "jalr $0, $25\n\t" \
272 " move $2, $0\n\t" \
273 ".set pop\n\t" \
274 : \
275 : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*sizeof(void*)),\
276 [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \
277 : "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9", \
278 "$10", "$11", "$12", "$25" \
279 );
280
281 #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE
282 #define CALL_GL_API_INTERNAL_DO_RETURN
283
284 #elif defined(__mips__)
285
286 #define API_ENTRY(_api) __attribute__((naked,noinline)) _api
287
288 // t0: $8
289 // fn: $25
290 // tls: $3
291 // v0: $2
292 #define CALL_GL_API_INTERNAL_CALL(_api, ...) \
293 asm volatile( \
294 ".set push\n\t" \
295 ".set noreorder\n\t" \
296 ".set mips32r2\n\t" \
297 "rdhwr $3, $29\n\t" \
298 "lw $3, %[OPENGL_API]($3)\n\t" \
299 "beqz $3, 1f\n\t" \
300 " move $25,$ra\n\t" \
301 "lw $3, %[API]($3)\n\t" \
302 "beqz $3, 1f\n\t" \
303 " nop\n\t" \
304 "move $25, $3\n\t" \
305 "1:\n\t" \
306 "jalr $0, $25\n\t" \
307 " move $2, $0\n\t" \
308 ".set pop\n\t" \
309 : \
310 : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4), \
311 [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \
312 : "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$25" \
313 );
314
315 #define CALL_GL_API_INTERNAL_SET_RETURN_VALUE
316 #define CALL_GL_API_INTERNAL_DO_RETURN
317
318 #endif
319
320 #define CALL_GL_API(_api, ...) \
321 CALL_GL_API_INTERNAL_CALL(_api, __VA_ARGS__) \
322 CALL_GL_API_INTERNAL_DO_RETURN
323
324 #define CALL_GL_API_RETURN(_api, ...) \
325 CALL_GL_API_INTERNAL_CALL(_api, __VA_ARGS__) \
326 CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
327 CALL_GL_API_INTERNAL_DO_RETURN
328
329 extern "C" {
330 #pragma GCC diagnostic ignored "-Wunused-parameter"
331 #include "gl_api.in"
332 #include "glext_api.in"
333 #pragma GCC diagnostic warning "-Wunused-parameter"
334 }
335
336 #undef API_ENTRY
337 #undef CALL_GL_API
338 #undef CALL_GL_API_INTERNAL_CALL
339 #undef CALL_GL_API_INTERNAL_SET_RETURN_VALUE
340 #undef CALL_GL_API_INTERNAL_DO_RETURN
341 #undef CALL_GL_API_RETURN
342
343 /*
344 * glGetString() is special because we expose some extensions in the wrapper
345 */
346
347 extern "C" const GLubyte * __glGetString(GLenum name);
348
glGetString(GLenum name)349 const GLubyte * glGetString(GLenum name) {
350 const GLubyte * ret = egl_get_string_for_current_context(name);
351 if (ret == NULL) {
352 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
353 ret = _c->glGetString(name);
354 }
355 return ret;
356 }
357