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
incRef()54 inline void incRef() { count.fetch_add(1, std::memory_order_relaxed); }
decRef()55 inline size_t decRef() { return count.fetch_sub(1, std::memory_order_acq_rel); }
getDisplay()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);
LocalRef(egl_display_t const * display,T o)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 }
get()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>
LocalRef(egl_object_t * rhs)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>
~LocalRef()95 egl_object_t::LocalRef<N,T>::~LocalRef() {
96 if (ref) {
97 ref->destroy();
98 }
99 }
100
101 template <typename N, typename T>
acquire()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>
release()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>
terminate()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:
~egl_context_t()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>
egl_to_native_cast(EGL arg)179 static inline NATIVE* egl_to_native_cast(EGL arg) {
180 return reinterpret_cast<NATIVE*>(arg);
181 }
182
183 static inline
get_surface(EGLSurface surface)184 egl_surface_t* get_surface(EGLSurface surface) {
185 return egl_to_native_cast<egl_surface_t>(surface);
186 }
187
188 static inline
get_context(EGLContext context)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