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 #ifndef ANDROID_GLES_CM_HOOKS_H 18 #define ANDROID_GLES_CM_HOOKS_H 19 20 #include <ctype.h> 21 #include <string.h> 22 #include <errno.h> 23 24 #include <pthread.h> 25 26 #include <EGL/egl.h> 27 #include <EGL/eglext.h> 28 #include <GLES/gl.h> 29 #include <GLES/glext.h> 30 #include <GLES2/gl2.h> 31 #include <GLES2/gl2ext.h> 32 #include <GLES3/gl3.h> 33 #include <GLES3/gl31.h> 34 35 // set to 1 for debugging 36 #define USE_SLOW_BINDING 0 37 38 #undef NELEM 39 #define NELEM(x) (sizeof(x)/sizeof(*(x))) 40 41 // maximum number of GL extensions that can be used simultaneously in 42 // a given process. this limitation exists because we need to have 43 // a static function for each extension and currently these static functions 44 // are generated at compile time. 45 #define MAX_NUMBER_OF_GL_EXTENSIONS 256 46 47 48 #include <bionic_tls.h> /* special private C library header */ 49 50 // ---------------------------------------------------------------------------- 51 namespace android { 52 // ---------------------------------------------------------------------------- 53 54 // GL / EGL hooks 55 56 #undef GL_ENTRY 57 #undef EGL_ENTRY 58 #define GL_ENTRY(_r, _api, ...) _r (*_api)(__VA_ARGS__); 59 #define EGL_ENTRY(_r, _api, ...) _r (*_api)(__VA_ARGS__); 60 61 struct egl_t { 62 #include "EGL/egl_entries.in" 63 }; 64 65 struct gl_hooks_t { 66 struct gl_t { 67 #include "entries.in" 68 } gl; 69 struct gl_ext_t { 70 __eglMustCastToProperFunctionPointerType extensions[MAX_NUMBER_OF_GL_EXTENSIONS]; 71 } ext; 72 }; 73 #undef GL_ENTRY 74 #undef EGL_ENTRY 75 76 EGLAPI void setGlThreadSpecific(gl_hooks_t const *value); 77 78 // We have a dedicated TLS slot in bionic get_tls_hooks()79 inline gl_hooks_t const * volatile * get_tls_hooks() { 80 volatile void *tls_base = __get_tls(); 81 gl_hooks_t const * volatile * tls_hooks = 82 reinterpret_cast<gl_hooks_t const * volatile *>(tls_base); 83 return tls_hooks; 84 } 85 getGlThreadSpecific()86 inline EGLAPI gl_hooks_t const* getGlThreadSpecific() { 87 gl_hooks_t const * volatile * tls_hooks = get_tls_hooks(); 88 gl_hooks_t const* hooks = tls_hooks[TLS_SLOT_OPENGL_API]; 89 return hooks; 90 } 91 92 // ---------------------------------------------------------------------------- 93 }; // namespace android 94 // ---------------------------------------------------------------------------- 95 96 #endif /* ANDROID_GLES_CM_HOOKS_H */ 97