1 /*
2  * Copyright (C) 2023 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_COMPANION_VIRTUALCAMERA_EGLDISPLAYCONTEXT_H
18 #define ANDROID_COMPANION_VIRTUALCAMERA_EGLDISPLAYCONTEXT_H
19 
20 #include <memory>
21 
22 #include "EGL/egl.h"
23 #include "system/window.h"
24 
25 namespace android {
26 namespace companion {
27 namespace virtualcamera {
28 
29 // Encapsulated EGLDisplay & EGLContext.
30 //
31 // Upon construction, this object will create and configure new
32 // EGLDisplay & EGLContext and will destroy them once it goes
33 // out of scope.
34 class EglDisplayContext {
35  public:
36   EglDisplayContext(std::shared_ptr<ANativeWindow> nativeWindow = nullptr);
37   ~EglDisplayContext();
38 
39   // Sets EGLDisplay & EGLContext for current thread.
40   //
41   // Returns true on success, false otherwise.
42   bool makeCurrent();
43 
44   EGLDisplay getEglDisplay() const;
45 
46   // Returns true if this instance encapsulates successfully initialized
47   // EGLDisplay & EGLContext.
48   bool isInitialized() const;
49 
50   void swapBuffers() const;
51 
52  private:
53   std::shared_ptr<ANativeWindow> mNativeWindow;
54 
55   EGLDisplay mEglDisplay;
56   EGLSurface mEglSurface;
57   EGLContext mEglContext;
58   EGLConfig mEglConfig;
59 };
60 
61 }  // namespace virtualcamera
62 }  // namespace companion
63 }  // namespace android
64 
65 #endif  // ANDROID_COMPANION_VIRTUALCAMERA_EGLDISPLAYCONTEXT_H
66