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 <GLES2/gl2.h> 24 #include <GLES2/gl2ext.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 // Actual GL entry-points 36 // ---------------------------------------------------------------------------- 37 38 #undef API_ENTRY 39 #undef CALL_GL_API 40 #undef CALL_GL_API_RETURN 41 42 #if USE_FAST_TLS_KEY 43 44 #ifdef HAVE_ARM_TLS_REGISTER 45 #define GET_TLS(reg) \ 46 "mrc p15, 0, " #reg ", c13, c0, 3 \n" 47 #else 48 #define GET_TLS(reg) \ 49 "mov " #reg ", #0xFFFF0FFF \n" \ 50 "ldr " #reg ", [" #reg ", #-15] \n" 51 #endif 52 53 #define API_ENTRY(_api) __attribute__((naked)) _api 54 55 #define CALL_GL_API(_api, ...) \ 56 asm volatile( \ 57 GET_TLS(r12) \ 58 "ldr r12, [r12, %[tls]] \n" \ 59 "cmp r12, #0 \n" \ 60 "ldrne pc, [r12, %[api]] \n" \ 61 "mov r0, #0 \n" \ 62 "bx lr \n" \ 63 : \ 64 : [tls] "J"(TLS_SLOT_OPENGL_API*4), \ 65 [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \ 66 : \ 67 ); 68 69 #define CALL_GL_API_RETURN(_api, ...) \ 70 CALL_GL_API(_api, __VA_ARGS__) \ 71 return 0; // placate gcc's warnings. never reached. 72 73 #else 74 75 #define API_ENTRY(_api) _api 76 77 #define CALL_GL_API(_api, ...) \ 78 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \ 79 _c->_api(__VA_ARGS__); 80 81 #define CALL_GL_API_RETURN(_api, ...) \ 82 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \ 83 return _c->_api(__VA_ARGS__) 84 85 #endif 86 87 88 extern "C" { 89 #include "gl2_api.in" 90 #include "gl2ext_api.in" 91 } 92 93 #undef API_ENTRY 94 #undef CALL_GL_API 95 #undef CALL_GL_API_RETURN 96 97 /* 98 * glGetString() is special because we expose some extensions in the wrapper 99 */ 100 101 extern "C" const GLubyte * __glGetString(GLenum name); 102 103 const GLubyte * glGetString(GLenum name) 104 { 105 const GLubyte * ret = egl_get_string_for_current_context(name); 106 if (ret == NULL) { 107 ret = __glGetString(name); 108 } 109 return ret; 110 } 111
