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 <GLES/gl.h>
24 #include <GLES/glext.h>
25
26 #include <cutils/log.h>
27 #include <cutils/properties.h>
28
29 #include "../hooks.h"
30 #include "../egl_impl.h"
31
32 using namespace android;
33
34 // ----------------------------------------------------------------------------
35 // extensions for the framework
36 // ----------------------------------------------------------------------------
37
38 extern "C" {
39 GL_API void GL_APIENTRY glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
40 const GLvoid *ptr, GLsizei count);
41 GL_API void GL_APIENTRY glNormalPointerBounds(GLenum type, GLsizei stride,
42 const GLvoid *pointer, GLsizei count);
43 GL_API void GL_APIENTRY glTexCoordPointerBounds(GLint size, GLenum type,
44 GLsizei stride, const GLvoid *pointer, GLsizei count);
45 GL_API void GL_APIENTRY glVertexPointerBounds(GLint size, GLenum type,
46 GLsizei stride, const GLvoid *pointer, GLsizei count);
47 GL_API void GL_APIENTRY glPointSizePointerOESBounds(GLenum type,
48 GLsizei stride, const GLvoid *pointer, GLsizei count);
49 GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type,
50 GLsizei stride, const GLvoid *pointer, GLsizei count);
51 GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type,
52 GLsizei stride, const GLvoid *pointer, GLsizei count);
53 }
54
glColorPointerBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * ptr,GLsizei)55 void glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
56 const GLvoid *ptr, GLsizei /*count*/) {
57 glColorPointer(size, type, stride, ptr);
58 }
glNormalPointerBounds(GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei)59 void glNormalPointerBounds(GLenum type, GLsizei stride,
60 const GLvoid *pointer, GLsizei /*count*/) {
61 glNormalPointer(type, stride, pointer);
62 }
glTexCoordPointerBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei)63 void glTexCoordPointerBounds(GLint size, GLenum type,
64 GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
65 glTexCoordPointer(size, type, stride, pointer);
66 }
glVertexPointerBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei)67 void glVertexPointerBounds(GLint size, GLenum type,
68 GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
69 glVertexPointer(size, type, stride, pointer);
70 }
71
glPointSizePointerOESBounds(GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei)72 void GL_APIENTRY glPointSizePointerOESBounds(GLenum type,
73 GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
74 glPointSizePointerOES(type, stride, pointer);
75 }
76
glMatrixIndexPointerOESBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei)77 GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type,
78 GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
79 glMatrixIndexPointerOES(size, type, stride, pointer);
80 }
81
glWeightPointerOESBounds(GLint size,GLenum type,GLsizei stride,const GLvoid * pointer,GLsizei)82 GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type,
83 GLsizei stride, const GLvoid *pointer, GLsizei /*count*/) {
84 glWeightPointerOES(size, type, stride, pointer);
85 }
86
87 // ----------------------------------------------------------------------------
88 // Actual GL entry-points
89 // ----------------------------------------------------------------------------
90
91 #undef API_ENTRY
92 #undef CALL_GL_API
93 #undef CALL_GL_API_RETURN
94
95 #if USE_SLOW_BINDING
96
97 #define API_ENTRY(_api) _api
98
99 #define CALL_GL_API(_api, ...) \
100 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
101 if (_c) return _c->_api(__VA_ARGS__);
102
103 #elif defined(__arm__)
104
105 #define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n"
106
107 #define API_ENTRY(_api) __attribute__((noinline)) _api
108
109 #define CALL_GL_API(_api, ...) \
110 asm volatile( \
111 GET_TLS(r12) \
112 "ldr r12, [r12, %[tls]] \n" \
113 "cmp r12, #0 \n" \
114 "ldrne pc, [r12, %[api]] \n" \
115 : \
116 : [tls] "J"(TLS_SLOT_OPENGL_API*4), \
117 [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \
118 : "r12" \
119 );
120
121 #elif defined(__aarch64__)
122
123 #define API_ENTRY(_api) __attribute__((noinline)) _api
124
125 #define CALL_GL_API(_api, ...) \
126 asm volatile( \
127 "mrs x16, tpidr_el0\n" \
128 "ldr x16, [x16, %[tls]]\n" \
129 "cbz x16, 1f\n" \
130 "ldr x16, [x16, %[api]]\n" \
131 "br x16\n" \
132 "1:\n" \
133 : \
134 : [tls] "i" (TLS_SLOT_OPENGL_API * sizeof(void*)), \
135 [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \
136 : "x16" \
137 );
138
139 #elif defined(__i386__)
140
141 #define API_ENTRY(_api) __attribute__((noinline)) _api
142
143 #define CALL_GL_API(_api, ...) \
144 register void* fn; \
145 __asm__ volatile( \
146 "mov %%gs:0, %[fn]\n" \
147 "mov %P[tls](%[fn]), %[fn]\n" \
148 "test %[fn], %[fn]\n" \
149 "je 1f\n" \
150 "jmp *%P[api](%[fn])\n" \
151 "1:\n" \
152 : [fn] "=r" (fn) \
153 : [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)), \
154 [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \
155 : "cc" \
156 );
157
158 #elif defined(__x86_64__)
159
160 #define API_ENTRY(_api) __attribute__((noinline)) _api
161
162 #define CALL_GL_API(_api, ...) \
163 register void** fn; \
164 __asm__ volatile( \
165 "mov %%fs:0, %[fn]\n" \
166 "mov %P[tls](%[fn]), %[fn]\n" \
167 "test %[fn], %[fn]\n" \
168 "je 1f\n" \
169 "jmp *%P[api](%[fn])\n" \
170 "1:\n" \
171 : [fn] "=r" (fn) \
172 : [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)), \
173 [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \
174 : "cc" \
175 );
176
177 #elif defined(__mips__)
178
179 #define API_ENTRY(_api) __attribute__((noinline)) _api
180
181 #define CALL_GL_API(_api, ...) \
182 register unsigned int _t0 asm("t0"); \
183 register unsigned int _fn asm("t1"); \
184 register unsigned int _tls asm("v1"); \
185 register unsigned int _v0 asm("v0"); \
186 asm volatile( \
187 ".set push\n\t" \
188 ".set noreorder\n\t" \
189 ".set mips32r2\n\t" \
190 "rdhwr %[tls], $29\n\t" \
191 "lw %[t0], %[OPENGL_API](%[tls])\n\t" \
192 "beqz %[t0], 1f\n\t" \
193 " move %[fn], $ra\n\t" \
194 "lw %[fn], %[API](%[t0])\n\t" \
195 "movz %[fn], $ra, %[fn]\n\t" \
196 "1:\n\t" \
197 "j %[fn]\n\t" \
198 " move %[v0], $0\n\t" \
199 ".set pop\n\t" \
200 : [fn] "=c"(_fn), \
201 [tls] "=&r"(_tls), \
202 [t0] "=&r"(_t0), \
203 [v0] "=&r"(_v0) \
204 : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4), \
205 [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \
206 : \
207 );
208
209 #endif
210
211 #define CALL_GL_API_RETURN(_api, ...) \
212 CALL_GL_API(_api, __VA_ARGS__) \
213 return 0;
214
215
216 extern "C" {
217 #pragma GCC diagnostic ignored "-Wunused-parameter"
218 #include "gl_api.in"
219 #include "glext_api.in"
220 #pragma GCC diagnostic warning "-Wunused-parameter"
221 }
222
223 #undef API_ENTRY
224 #undef CALL_GL_API
225 #undef CALL_GL_API_RETURN
226
227 /*
228 * glGetString() is special because we expose some extensions in the wrapper
229 */
230
231 extern "C" const GLubyte * __glGetString(GLenum name);
232
glGetString(GLenum name)233 const GLubyte * glGetString(GLenum name) {
234 const GLubyte * ret = egl_get_string_for_current_context(name);
235 if (ret == NULL) {
236 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
237 ret = _c->glGetString(name);
238 }
239 return ret;
240 }
241