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 <EGL/egl.h> 25#include <EGL/eglext.h> 26#include <GLES/gl.h> 27#include <GLES/glext.h> 28 29#if !defined(__arm__) 30#define USE_SLOW_BINDING 1 31#else 32#define USE_SLOW_BINDING 0 33#endif 34#undef NELEM 35#define NELEM(x) (sizeof(x)/sizeof(*(x))) 36#define MAX_NUMBER_OF_GL_EXTENSIONS 32 37 38 39#if defined(HAVE_ANDROID_OS) && !USE_SLOW_BINDING && __OPTIMIZE__ 40#define USE_FAST_TLS_KEY 1 41#else 42#define USE_FAST_TLS_KEY 0 43#endif 44 45#if USE_FAST_TLS_KEY 46# include <bionic_tls.h> /* special private C library header */ 47#endif 48 49// ---------------------------------------------------------------------------- 50namespace android { 51// ---------------------------------------------------------------------------- 52 53// EGLDisplay are global, not attached to a given thread 54const unsigned int NUM_DISPLAYS = 1; 55 56enum { 57 IMPL_HARDWARE = 0, 58 IMPL_SOFTWARE, 59 60 IMPL_NUM_DRIVERS_IMPLEMENTATIONS, 61 62 IMPL_CONTEXT_LOST = IMPL_NUM_DRIVERS_IMPLEMENTATIONS, 63 IMPL_NO_CONTEXT, 64 65 IMPL_NUM_IMPLEMENTATIONS 66}; 67 68// ---------------------------------------------------------------------------- 69 70// GL / EGL hooks 71 72#undef GL_ENTRY 73#undef EGL_ENTRY 74#define GL_ENTRY(_r, _api, ...) _r (*_api)(__VA_ARGS__); 75#define EGL_ENTRY(_r, _api, ...) _r (*_api)(__VA_ARGS__); 76 77struct gl_hooks_t { 78 struct gl_t { 79 #include "gl_entries.in" 80 #include "glext_entries.in" 81 } gl; 82 struct egl_t { 83 #include "egl_entries.in" 84 } egl; 85 struct gl_ext_t { 86 void (*extensions[MAX_NUMBER_OF_GL_EXTENSIONS])(void); 87 } ext; 88}; 89#undef GL_ENTRY 90#undef EGL_ENTRY 91 92 93// ---------------------------------------------------------------------------- 94 95extern gl_hooks_t gHooks[IMPL_NUM_IMPLEMENTATIONS]; 96extern pthread_key_t gGLWrapperKey; 97 98#if USE_FAST_TLS_KEY 99 100// We have a dedicated TLS slot in bionic 101static inline gl_hooks_t const * volatile * get_tls_hooks() { 102 volatile void *tls_base = __get_tls(); 103 gl_hooks_t const * volatile * tls_hooks = 104 reinterpret_cast<gl_hooks_t const * volatile *>(tls_base); 105 return tls_hooks; 106} 107 108static inline void setGlThreadSpecific(gl_hooks_t const *value) { 109 gl_hooks_t const * volatile * tls_hooks = get_tls_hooks(); 110 tls_hooks[TLS_SLOT_OPENGL_API] = value; 111} 112 113static gl_hooks_t const* getGlThreadSpecific() { 114 gl_hooks_t const * volatile * tls_hooks = get_tls_hooks(); 115 gl_hooks_t const* hooks = tls_hooks[TLS_SLOT_OPENGL_API]; 116 if (hooks) return hooks; 117 return &gHooks[IMPL_NO_CONTEXT]; 118} 119 120#else 121 122static inline void setGlThreadSpecific(gl_hooks_t const *value) { 123 pthread_setspecific(gGLWrapperKey, value); 124} 125 126static gl_hooks_t const* getGlThreadSpecific() { 127 gl_hooks_t const* hooks = static_cast<gl_hooks_t*>(pthread_getspecific(gGLWrapperKey)); 128 if (hooks) return hooks; 129 return &gHooks[IMPL_NO_CONTEXT]; 130} 131 132#endif 133 134 135// ---------------------------------------------------------------------------- 136}; // namespace android 137// ---------------------------------------------------------------------------- 138 139#endif /* ANDROID_GLES_CM_HOOKS_H */ 140