1 /*
2  * Copyright (C) 2016 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 #pragma once
18 
19 #include "Readback.h"
20 
21 namespace android {
22 namespace uirenderer {
23 
24 class Matrix4;
25 class GlLayer;
26 
27 class OpenGLReadback : public Readback {
28 public:
29     virtual CopyResult copySurfaceInto(Surface& surface, const Rect& srcRect,
30             SkBitmap* bitmap) override;
31     virtual CopyResult copyGraphicBufferInto(GraphicBuffer* graphicBuffer,
32             SkBitmap* bitmap) override;
33 
34 protected:
OpenGLReadback(renderthread::RenderThread & thread)35     explicit OpenGLReadback(renderthread::RenderThread& thread) : Readback(thread) {}
~OpenGLReadback()36     virtual ~OpenGLReadback() {}
37 
38     virtual CopyResult copyImageInto(EGLImageKHR eglImage, const Matrix4& imgTransform,
39             int imgWidth, int imgHeight, const Rect& srcRect, SkBitmap* bitmap) = 0;
40 private:
41     CopyResult copyGraphicBufferInto(GraphicBuffer* graphicBuffer, Matrix4& texTransform,
42             const Rect& srcRect, SkBitmap* bitmap);
43 };
44 
45 class OpenGLReadbackImpl : public OpenGLReadback {
46 public:
OpenGLReadbackImpl(renderthread::RenderThread & thread)47     OpenGLReadbackImpl(renderthread::RenderThread& thread) : OpenGLReadback(thread) {}
48 
49     /**
50      * Copies the layer's contents into the provided bitmap.
51      */
52     static bool copyLayerInto(renderthread::RenderThread& renderThread, GlLayer& layer,
53             SkBitmap* bitmap);
54 
55 protected:
56     virtual CopyResult copyImageInto(EGLImageKHR eglImage, const Matrix4& imgTransform,
57             int imgWidth, int imgHeight, const Rect& srcRect, SkBitmap* bitmap) override;
58 };
59 
60 } // namespace uirenderer
61 } // namespace android
62