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_EGL_OBJECT_H 18 #define ANDROID_EGL_OBJECT_H 19 20 #include <atomic> 21 #include <ctype.h> 22 #include <stdint.h> 23 #include <stdlib.h> 24 25 #include <EGL/egl.h> 26 #include <EGL/eglext.h> 27 28 #include <utils/threads.h> 29 #include <utils/String8.h> 30 #include <utils/Vector.h> 31 32 #include <system/window.h> 33 34 #include "egl_display.h" 35 36 // ---------------------------------------------------------------------------- 37 namespace android { 38 // ---------------------------------------------------------------------------- 39 40 class egl_display_t; 41 42 class egl_object_t { 43 egl_display_t *display; 44 mutable std::atomic_size_t count; 45 46 protected: 47 virtual ~egl_object_t(); 48 virtual void terminate(); 49 50 public: 51 egl_object_t(egl_display_t* display); 52 void destroy(); 53 54 inline void incRef() { count.fetch_add(1, std::memory_order_relaxed); } 55 inline size_t decRef() { return count.fetch_sub(1, std::memory_order_acq_rel); } 56 inline egl_display_t* getDisplay() const { return display; } 57 58 private: 59 static bool get(egl_display_t const* display, egl_object_t* object); 60 61 public: 62 template <typename N, typename T> 63 class LocalRef { 64 egl_object_t* ref; 65 LocalRef(); 66 LocalRef(const LocalRef* rhs); 67 public: 68 ~LocalRef(); 69 explicit LocalRef(egl_object_t* rhs); 70 explicit LocalRef(egl_display_t const* display, T o) : ref(0) { 71 egl_object_t* native = reinterpret_cast<N*>(o); 72 if (o && egl_object_t::get(display, native)) { 73 ref = native; 74 } 75 } 76 inline N* get() { 77 return static_cast<N*>(ref); 78 } 79 void acquire() const; 80 void release() const; 81 void terminate(); 82 }; 83 template <typename N, typename T> 84 friend class LocalRef; 85 }; 86 87 template<typename N, typename T> 88 egl_object_t::LocalRef<N, T>::LocalRef(egl_object_t* rhs) : ref(rhs) { 89 if (ref) { 90 ref->incRef(); 91 } 92 } 93 94 template <typename N, typename T> 95 egl_object_t::LocalRef<N,T>::~LocalRef() { 96 if (ref) { 97 ref->destroy(); 98 } 99 } 100 101 template <typename N, typename T> 102 void egl_object_t::LocalRef<N,T>::acquire() const { 103 if (ref) { 104 ref->incRef(); 105 } 106 } 107 108 template <typename N, typename T> 109 void egl_object_t::LocalRef<N,T>::release() const { 110 if (ref) { 111 if (ref->decRef() == 1) { 112 // shouldn't happen because this is called from LocalRef 113 ALOGE("LocalRef::release() removed the last reference!"); 114 } 115 } 116 } 117 118 template <typename N, typename T> 119 void egl_object_t::LocalRef<N,T>::terminate() { 120 if (ref) { 121 ref->terminate(); 122 } 123 } 124 125 // ---------------------------------------------------------------------------- 126 127 class egl_surface_t : public egl_object_t { 128 protected: 129 ~egl_surface_t(); 130 void terminate() override; 131 public: 132 typedef egl_object_t::LocalRef<egl_surface_t, EGLSurface> Ref; 133 134 egl_surface_t(egl_display_t* dpy, EGLConfig config, 135 EGLNativeWindowType win, EGLSurface surface, 136 egl_connection_t const* cnx); 137 138 EGLSurface surface; 139 EGLConfig config; 140 sp<ANativeWindow> win; 141 egl_connection_t const* cnx; 142 bool enableTimestamps; 143 private: 144 bool connected; 145 void disconnect(); 146 }; 147 148 class egl_context_t: public egl_object_t { 149 protected: 150 ~egl_context_t() {} 151 public: 152 typedef egl_object_t::LocalRef<egl_context_t, EGLContext> Ref; 153 154 egl_context_t(EGLDisplay dpy, EGLContext context, EGLConfig config, 155 egl_connection_t const* cnx, int version); 156 157 void onLooseCurrent(); 158 void onMakeCurrent(EGLSurface draw, EGLSurface read); 159 160 EGLDisplay dpy; 161 EGLContext context; 162 EGLConfig config; 163 EGLSurface read; 164 EGLSurface draw; 165 egl_connection_t const* cnx; 166 int version; 167 String8 gl_extensions; 168 Vector<String8> tokenized_gl_extensions; 169 }; 170 171 // ---------------------------------------------------------------------------- 172 173 typedef egl_surface_t::Ref SurfaceRef; 174 typedef egl_context_t::Ref ContextRef; 175 176 // ---------------------------------------------------------------------------- 177 178 template<typename NATIVE, typename EGL> 179 static inline NATIVE* egl_to_native_cast(EGL arg) { 180 return reinterpret_cast<NATIVE*>(arg); 181 } 182 183 static inline 184 egl_surface_t* get_surface(EGLSurface surface) { 185 return egl_to_native_cast<egl_surface_t>(surface); 186 } 187 188 static inline 189 egl_context_t* get_context(EGLContext context) { 190 return egl_to_native_cast<egl_context_t>(context); 191 } 192 193 // ---------------------------------------------------------------------------- 194 }; // namespace android 195 // ---------------------------------------------------------------------------- 196 197 #endif // ANDROID_EGL_OBJECT_H 198
