gl2.cpp revision f5c7cb316cc8c8e2d6ae93a659ac771420cbfa2b
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 33using 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 #define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n" 46 47 #define API_ENTRY(_api) __attribute__((naked)) _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 "mov r0, #0 \n" \ 56 "bx lr \n" \ 57 : \ 58 : [tls] "J"(TLS_SLOT_OPENGL_API*4), \ 59 [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \ 60 : \ 61 ); 62 63 #define CALL_GL_API_RETURN(_api, ...) \ 64 CALL_GL_API(_api, __VA_ARGS__) \ 65 return 0; // placate gcc's warnings. never reached. 66 67#else 68 69 #define API_ENTRY(_api) _api 70 71 #define CALL_GL_API(_api, ...) \ 72 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \ 73 _c->_api(__VA_ARGS__); 74 75 #define CALL_GL_API_RETURN(_api, ...) \ 76 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \ 77 return _c->_api(__VA_ARGS__) 78 79#endif 80 81 82extern "C" { 83#include "gl3_api.in" 84#include "gl2ext_api.in" 85#include "gl3ext_api.in" 86} 87 88#undef API_ENTRY 89#undef CALL_GL_API 90#undef CALL_GL_API_RETURN 91 92/* 93 * glGetString() is special because we expose some extensions in the wrapper 94 */ 95 96extern "C" const GLubyte * __glGetString(GLenum name); 97 98const GLubyte * glGetString(GLenum name) 99{ 100 const GLubyte * ret = egl_get_string_for_current_context(name); 101 if (ret == NULL) { 102 ret = __glGetString(name); 103 } 104 return ret; 105} 106