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
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
31 #include <system/window.h>
32
33 #include "egl_display.h"
34
35 // ----------------------------------------------------------------------------
36 namespace android {
37 // ----------------------------------------------------------------------------
38
39 struct egl_display_t;
40
41 class egl_object_t {
42 egl_display_t *display;
43 mutable volatile int32_t count;
44
45 protected:
46 virtual ~egl_object_t();
47
48 public:
49 egl_object_t(egl_display_t* display);
50 void destroy();
51
incRef()52 inline int32_t incRef() { return android_atomic_inc(&count); }
decRef()53 inline int32_t decRef() { return android_atomic_dec(&count); }
getDisplay()54 inline egl_display_t* getDisplay() const { return display; }
55
56 private:
57 void terminate();
58 static bool get(egl_display_t const* display, egl_object_t* object);
59
60 public:
61 template <typename N, typename T>
62 class LocalRef {
63 egl_object_t* ref;
64 LocalRef();
65 LocalRef(const LocalRef* rhs);
66 public:
67 ~LocalRef();
68 explicit LocalRef(egl_object_t* rhs);
LocalRef(egl_display_t const * display,T o)69 explicit LocalRef(egl_display_t const* display, T o) : ref(0) {
70 egl_object_t* native = reinterpret_cast<N*>(o);
71 if (o && egl_object_t::get(display, native)) {
72 ref = native;
73 }
74 }
get()75 inline N* get() {
76 return static_cast<N*>(ref);
77 }
78 void acquire() const;
79 void release() const;
80 void terminate();
81 };
82 template <typename N, typename T>
83 friend class LocalRef;
84 };
85
86 template<typename N, typename T>
LocalRef(egl_object_t * rhs)87 egl_object_t::LocalRef<N, T>::LocalRef(egl_object_t* rhs) : ref(rhs) {
88 if (ref) {
89 ref->incRef();
90 }
91 }
92
93 template <typename N, typename T>
~LocalRef()94 egl_object_t::LocalRef<N,T>::~LocalRef() {
95 if (ref) {
96 ref->destroy();
97 }
98 }
99
100 template <typename N, typename T>
acquire()101 void egl_object_t::LocalRef<N,T>::acquire() const {
102 if (ref) {
103 ref->incRef();
104 }
105 }
106
107 template <typename N, typename T>
release()108 void egl_object_t::LocalRef<N,T>::release() const {
109 if (ref) {
110 if (ref->decRef() == 1) {
111 // shouldn't happen because this is called from LocalRef
112 ALOGE("LocalRef::release() removed the last reference!");
113 }
114 }
115 }
116
117 template <typename N, typename T>
terminate()118 void egl_object_t::LocalRef<N,T>::terminate() {
119 if (ref) {
120 ref->terminate();
121 }
122 }
123
124 // ----------------------------------------------------------------------------
125
126 class egl_surface_t : public egl_object_t {
127 protected:
128 ~egl_surface_t();
129 public:
130 typedef egl_object_t::LocalRef<egl_surface_t, EGLSurface> Ref;
131
132 egl_surface_t(egl_display_t* dpy, EGLConfig config,
133 EGLNativeWindowType win, EGLSurface surface,
134 egl_connection_t const* cnx);
135
136 EGLSurface surface;
137 EGLConfig config;
138 sp<ANativeWindow> win;
139 egl_connection_t const* cnx;
140 };
141
142 class egl_context_t: public egl_object_t {
143 protected:
~egl_context_t()144 ~egl_context_t() {}
145 public:
146 typedef egl_object_t::LocalRef<egl_context_t, EGLContext> Ref;
147
148 egl_context_t(EGLDisplay dpy, EGLContext context, EGLConfig config,
149 egl_connection_t const* cnx, int version);
150
151 void onLooseCurrent();
152 void onMakeCurrent(EGLSurface draw, EGLSurface read);
153
154 EGLDisplay dpy;
155 EGLContext context;
156 EGLConfig config;
157 EGLSurface read;
158 EGLSurface draw;
159 egl_connection_t const* cnx;
160 int version;
161 String8 gl_extensions;
162 };
163
164 // ----------------------------------------------------------------------------
165
166 typedef egl_surface_t::Ref SurfaceRef;
167 typedef egl_context_t::Ref ContextRef;
168
169 // ----------------------------------------------------------------------------
170
171 template<typename NATIVE, typename EGL>
egl_to_native_cast(EGL arg)172 static inline NATIVE* egl_to_native_cast(EGL arg) {
173 return reinterpret_cast<NATIVE*>(arg);
174 }
175
176 static inline
get_surface(EGLSurface surface)177 egl_surface_t* get_surface(EGLSurface surface) {
178 return egl_to_native_cast<egl_surface_t>(surface);
179 }
180
181 static inline
get_context(EGLContext context)182 egl_context_t* get_context(EGLContext context) {
183 return egl_to_native_cast<egl_context_t>(context);
184 }
185
186 // ----------------------------------------------------------------------------
187 }; // namespace android
188 // ----------------------------------------------------------------------------
189
190 #endif // ANDROID_EGL_OBJECT_H
191