Diligent Engine API Reference: D:/GitHub/DiligentEngine/DiligentCore/External/Android/ndk_helper/include/GLContext.h Source File

Diligent Engine API Reference

GLContext.h
1 /*
2 * Copyright 2013 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 //--------------------------------------------------------------------------------
18 // GLContext.h
19 //--------------------------------------------------------------------------------
20 #ifndef GLCONTEXT_H_
21 #define GLCONTEXT_H_
22
23 #include <EGL/egl.h>
24 #include <GLES2/gl2.h>
25 #include <android/log.h>
26
27 #include "JNIHelper.h"
28
29 namespace ndk_helper {
30
31 //--------------------------------------------------------------------------------
32 // Constants
33 //--------------------------------------------------------------------------------
34
35 //--------------------------------------------------------------------------------
36 // Class
37 //--------------------------------------------------------------------------------
38
39 /******************************************************************
40 * OpenGL context handler
41 * The class handles OpenGL and EGL context based on Android activity life cycle
42 * The caller needs to call corresponding methods for each activity life cycle
43 *events as it's done in sample codes.
44 *
45 * Also the class initializes OpenGL ES3 when the compatible driver is installed
46 *in the device.
47 * getGLVersion() returns 3.0~ when the device supports OpenGLES3.0
48 *
49 * Thread safety: OpenGL context is expecting used within dedicated single
50 *thread,
51 * thus GLContext class is not designed as a thread-safe
52 */
53 class GLContext {
54 private:
55 // EGL configurations
56 ANativeWindow* window_;
57 EGLDisplay display_;
58 EGLSurface surface_;
59 EGLContext context_;
60 EGLConfig config_;
61
62 // Screen parameters
63 int32_t screen_width_;
64 int32_t screen_height_;
65 int32_t color_size_;
66 int32_t depth_size_;
67
68 // Flags
69 bool gles_initialized_;
70 bool egl_context_initialized_;
71 bool es3_supported_;
72 float gl_version_;
73 bool context_valid_;
74
75 void InitGLES();
76 void Terminate();
77 bool InitEGLSurface();
78 bool InitEGLContext();
79
80 GLContext(GLContext const&);
81 void operator=(GLContext const&);
82 GLContext();
83 virtual ~GLContext();
84
85 public:
86 static GLContext* GetInstance() {
87 // Singleton
88 static GLContext instance;
89
90 return &instance;
91 }
92
93 bool Init(ANativeWindow* window);
94 EGLint Swap();
95 bool Invalidate();
96
97 void Suspend();
98 EGLint Resume(ANativeWindow* window);
99
100 ANativeWindow* GetANativeWindow(void) const { return window_; };
101 int32_t GetScreenWidth() const { return screen_width_; }
102 int32_t GetScreenHeight() const { return screen_height_; }
103
104 int32_t GetBufferColorSize() const { return color_size_; }
105 int32_t GetBufferDepthSize() const { return depth_size_; }
106 float GetGLVersion() const { return gl_version_; }
107 bool CheckExtension(const char* extension);
108
109 EGLDisplay GetDisplay() const { return display_; }
110 EGLSurface GetSurface() const { return surface_; }
111 };
112
113 } // namespace ndkHelper
114
115 #endif /* GLCONTEXT_H_ */
ndk_helper
Definition: gestureDetector.h:32