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 defined(__arm__) && !USE_SLOW_BINDING 44 45 #define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n" 46 47 #define API_ENTRY(_api) __attribute__((noinline)) _api 48 49 #define CALL_GL_API(_api, ...) \ 50 asm volatile( \ 51 GET_TLS(r12) \ 52 "ldr r12, [r12, %[tls]] \n" \ 53 "cmp r12, #0 \n" \ 54 "ldrne pc, [r12, %[api]] \n" \ 55 : \ 56 : [tls] "J"(TLS_SLOT_OPENGL_API*4), \ 57 [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \ 58 : \ 59 ); 60 61 #elif defined(__mips__) && !USE_SLOW_BINDING 62 63 #define API_ENTRY(_api) __attribute__((noinline)) _api 64 65 #define CALL_GL_API(_api, ...) \ 66 register unsigned int _t0 asm("t0"); \ 67 register unsigned int _fn asm("t1"); \ 68 register unsigned int _tls asm("v1"); \ 69 register unsigned int _v0 asm("v0"); \ 70 asm volatile( \ 71 ".set push\n\t" \ 72 ".set noreorder\n\t" \ 73 ".set mips32r2\n\t" \ 74 "rdhwr %[tls], $29\n\t" \ 75 "lw %[t0], %[OPENGL_API](%[tls])\n\t" \ 76 "beqz %[t0], 1f\n\t" \ 77 " move %[fn],$ra\n\t" \ 78 "lw %[fn], %[API](%[t0])\n\t" \ 79 "movz %[fn], $ra, %[fn]\n\t" \ 80 "1:\n\t" \ 81 "j %[fn]\n\t" \ 82 " move %[v0], $0\n\t" \ 83 ".set pop\n\t" \ 84 : [fn] "=c"(_fn), \ 85 [tls] "=&r"(_tls), \ 86 [t0] "=&r"(_t0), \ 87 [v0] "=&r"(_v0) \ 88 : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4), \ 89 [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \ 90 : \ 91 ); 92 93 #else 94 95 #define API_ENTRY(_api) _api 96 97 #define CALL_GL_API(_api, ...) \ 98 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \ 99 if (_c) return _c->_api(__VA_ARGS__); 100 101 #endif 102 103 #define CALL_GL_API_RETURN(_api, ...) \ 104 CALL_GL_API(_api, __VA_ARGS__) \ 105 return 0; 106 107 108 109 extern "C" { 110 #include "gl3_api.in" 111 #include "gl2ext_api.in" 112 #include "gl3ext_api.in" 113 } 114 115 #undef API_ENTRY 116 #undef CALL_GL_API 117 #undef CALL_GL_API_RETURN 118 119 /* 120 * glGetString() is special because we expose some extensions in the wrapper 121 */ 122 123 extern "C" const GLubyte * __glGetString(GLenum name); 124 125 const GLubyte * glGetString(GLenum name) 126 { 127 const GLubyte * ret = egl_get_string_for_current_context(name); 128 if (ret == NULL) { 129 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; 130 ret = _c->glGetString(name); 131 } 132 return ret; 133 } 134
