gl2.cpp revision ecacc3f164f2bf2c8c4ff5a20496511249d2cd4b
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 29using 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 196extern "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() is special because we expose some extensions in the wrapper 209 */ 210 211extern "C" const GLubyte * __glGetString(GLenum name); 212 213const GLubyte * glGetString(GLenum name) 214{ 215 const GLubyte * ret = egl_get_string_for_current_context(name); 216 if (ret == NULL) { 217 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; 218 if(_c) ret = _c->glGetString(name); 219 } 220 return ret; 221} 222