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#include <GLES3/gl32.h> 35 36// set to 1 for debugging 37#define USE_SLOW_BINDING 0 38 39#undef NELEM 40#define NELEM(x) (sizeof(x)/sizeof(*(x))) 41 42// maximum number of GL extensions that can be used simultaneously in 43// a given process. this limitation exists because we need to have 44// a static function for each extension and currently these static functions 45// are generated at compile time. 46#define MAX_NUMBER_OF_GL_EXTENSIONS 256 47 48 49#include <bionic_tls.h> /* special private C library header */ 50 51// ---------------------------------------------------------------------------- 52namespace android { 53// ---------------------------------------------------------------------------- 54 55// GL / EGL hooks 56 57#undef GL_ENTRY 58#undef EGL_ENTRY 59#define GL_ENTRY(_r, _api, ...) _r (*_api)(__VA_ARGS__); 60#define EGL_ENTRY(_r, _api, ...) _r (*_api)(__VA_ARGS__); 61 62struct egl_t { 63 #include "EGL/egl_entries.in" 64}; 65 66struct gl_hooks_t { 67 struct gl_t { 68 #include "entries.in" 69 } gl; 70 struct gl_ext_t { 71 __eglMustCastToProperFunctionPointerType extensions[MAX_NUMBER_OF_GL_EXTENSIONS]; 72 } ext; 73}; 74#undef GL_ENTRY 75#undef EGL_ENTRY 76 77EGLAPI void setGlThreadSpecific(gl_hooks_t const *value); 78 79// We have a dedicated TLS slot in bionic 80inline gl_hooks_t const * volatile * get_tls_hooks() { 81 volatile void *tls_base = __get_tls(); 82 gl_hooks_t const * volatile * tls_hooks = 83 reinterpret_cast<gl_hooks_t const * volatile *>(tls_base); 84 return tls_hooks; 85} 86 87inline EGLAPI gl_hooks_t const* getGlThreadSpecific() { 88 gl_hooks_t const * volatile * tls_hooks = get_tls_hooks(); 89 gl_hooks_t const* hooks = tls_hooks[TLS_SLOT_OPENGL_API]; 90 return hooks; 91} 92 93// ---------------------------------------------------------------------------- 94}; // namespace android 95// ---------------------------------------------------------------------------- 96 97#endif /* ANDROID_GLES_CM_HOOKS_H */ 98