hooks.h revision fca1b54031a1ba2a3c82bbbbe71716cd7e6a61d7
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// ---------------------------------------------------------------------------- 51namespace 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 61struct egl_t { 62 #include "EGL/egl_entries.in" 63}; 64 65struct 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 76EGLAPI void setGlThreadSpecific(gl_hooks_t const *value); 77 78// We have a dedicated TLS slot in bionic 79inline 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 86inline 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