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 <GLES3/gl3.h> 24 #include <GLES3/gl3ext.h> 25 #include <GLES2/gl2ext.h> 26 27 #include <cutils/log.h> 28 #include <cutils/properties.h> 29 30 #include "../hooks.h" 31 #include "../egl_impl.h" 32 33 using namespace android; 34 35 // ---------------------------------------------------------------------------- 36 // Actual GL entry-points 37 // ---------------------------------------------------------------------------- 38 39 #undef API_ENTRY 40 #undef CALL_GL_API 41 #undef CALL_GL_API_RETURN 42 43 #if USE_FAST_TLS_KEY 44 45 #if defined(__arm__) 46 47 #define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n" 48 49 #define API_ENTRY(_api) __attribute__((naked)) _api 50 51 #define CALL_GL_API(_api, ...) \ 52 asm volatile( \ 53 GET_TLS(r12) \ 54 "ldr r12, [r12, %[tls]] \n" \ 55 "cmp r12, #0 \n" \ 56 "ldrne pc, [r12, %[api]] \n" \ 57 "mov r0, #0 \n" \ 58 "bx lr \n" \ 59 : \ 60 : [tls] "J"(TLS_SLOT_OPENGL_API*4), \ 61 [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \ 62 : \ 63 ); 64 65 #elif defined(__mips__) 66 67 #define API_ENTRY(_api) __attribute__((noinline)) _api 68 69 #define CALL_GL_API(_api, ...) \ 70 register unsigned int _t0 asm("t0"); \ 71 register unsigned int _fn asm("t1"); \ 72 register unsigned int _tls asm("v1"); \ 73 register unsigned int _v0 asm("v0"); \ 74 asm volatile( \ 75 ".set push\n\t" \ 76 ".set noreorder\n\t" \ 77 ".set mips32r2\n\t" \ 78 "rdhwr %[tls], $29\n\t" \ 79 "lw %[t0], %[OPENGL_API](%[tls])\n\t" \ 80 "beqz %[t0], 1f\n\t" \ 81 " move %[fn],$ra\n\t" \ 82 "lw %[fn], %[API](%[t0])\n\t" \ 83 "movz %[fn], $ra, %[fn]\n\t" \ 84 "1:\n\t" \ 85 "j %[fn]\n\t" \ 86 " move %[v0], $0\n\t" \ 87 ".set pop\n\t" \ 88 : [fn] "=c"(_fn), \ 89 [tls] "=&r"(_tls), \ 90 [t0] "=&r"(_t0), \ 91 [v0] "=&r"(_v0) \ 92 : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4), \ 93 [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \ 94 : \ 95 ); 96 97 #else 98 99 #error Unsupported architecture 100 101 #endif 102 103 #define CALL_GL_API_RETURN(_api, ...) \ 104 CALL_GL_API(_api, __VA_ARGS__) \ 105 return 0; // placate gcc's warnings. never reached. 106 107 #else 108 109 #define API_ENTRY(_api) _api 110 111 #define CALL_GL_API(_api, ...) \ 112 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \ 113 _c->_api(__VA_ARGS__); 114 115 #define CALL_GL_API_RETURN(_api, ...) \ 116 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \ 117 return _c->_api(__VA_ARGS__) 118 119 #endif 120 121 122 extern "C" { 123 #include "gl3_api.in" 124 #include "gl2ext_api.in" 125 #include "gl3ext_api.in" 126 } 127 128 #undef API_ENTRY 129 #undef CALL_GL_API 130 #undef CALL_GL_API_RETURN 131 132 /* 133 * glGetString() is special because we expose some extensions in the wrapper 134 */ 135 136 extern "C" const GLubyte * __glGetString(GLenum name); 137 138 const GLubyte * glGetString(GLenum name) 139 { 140 const GLubyte * ret = egl_get_string_for_current_context(name); 141 if (ret == NULL) { 142 ret = __glGetString(name); 143 } 144 return ret; 145 } 146
