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1 /*
2  * Copyright (C) 2015 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_GL_WORKER_H_
18 #define ANDROID_GL_WORKER_H_
19 
20 #include <vector>
21 
22 #define EGL_EGLEXT_PROTOTYPES
23 #define GL_GLEXT_PROTOTYPES
24 
25 #include <EGL/egl.h>
26 #include <EGL/eglext.h>
27 #include <GLES2/gl2.h>
28 #include <GLES2/gl2ext.h>
29 
30 #include <ui/GraphicBuffer.h>
31 
32 #include "autogl.h"
33 
34 namespace android {
35 
36 struct DrmHwcLayer;
37 struct DrmCompositionRegion;
38 
39 class GLWorkerCompositor {
40  public:
41   GLWorkerCompositor();
42   ~GLWorkerCompositor();
43 
44   int Init();
45   int Composite(DrmHwcLayer *layers, DrmCompositionRegion *regions,
46                 size_t num_regions, const sp<GraphicBuffer> &framebuffer);
47   void Finish();
48 
49  private:
50   struct CachedFramebuffer {
51     // If the strong_framebuffer is non-NULL, we are holding a strong reference
52     // until we are sure rendering is done. The weak reference will be equal in
53     // that case.
54     sp<GraphicBuffer> strong_framebuffer;
55     wp<GraphicBuffer> weak_framebuffer;
56     AutoEGLDisplayImage egl_fb_image;
57     AutoGLTexture gl_fb_tex;
58     AutoGLFramebuffer gl_fb;
59 
60     CachedFramebuffer(const sp<GraphicBuffer> &gb, AutoEGLDisplayImage &&image,
61                       AutoGLTexture &&tex, AutoGLFramebuffer &&fb);
62 
63     bool Promote();
64   };
65 
66   CachedFramebuffer *FindCachedFramebuffer(
67       const sp<GraphicBuffer> &framebuffer);
68   CachedFramebuffer *PrepareAndCacheFramebuffer(
69       const sp<GraphicBuffer> &framebuffer);
70 
71   GLint PrepareAndCacheProgram(unsigned texture_count);
72 
73   EGLDisplay egl_display_;
74   EGLContext egl_ctx_;
75 
76   std::vector<AutoGLProgram> blend_programs_;
77   AutoGLBuffer vertex_buffer_;
78 
79   std::vector<CachedFramebuffer> cached_framebuffers_;
80 };
81 }
82 
83 #endif
84