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 #include <EGL/egl.h>
22 #include <EGL/eglext.h>
23 
24 namespace android {
25 namespace uirenderer {
26 
27 class Matrix4;
28 class GlLayer;
29 
30 class OpenGLReadback : public Readback {
31 public:
32     virtual CopyResult copySurfaceInto(Surface& surface, const Rect& srcRect,
33                                        SkBitmap* bitmap) override;
34     virtual CopyResult copyGraphicBufferInto(GraphicBuffer* graphicBuffer,
35                                              SkBitmap* bitmap) override;
36 
37 protected:
OpenGLReadback(renderthread::RenderThread & thread)38     explicit OpenGLReadback(renderthread::RenderThread& thread) : Readback(thread) {}
~OpenGLReadback()39     virtual ~OpenGLReadback() {}
40 
41     virtual CopyResult copyImageInto(EGLImageKHR eglImage, const Matrix4& imgTransform,
42                                      int imgWidth, int imgHeight, const Rect& srcRect,
43                                      SkBitmap* bitmap) = 0;
44 
45 private:
46     CopyResult copyGraphicBufferInto(GraphicBuffer* graphicBuffer, Matrix4& texTransform,
47                                      const Rect& srcRect, SkBitmap* bitmap);
48 };
49 
50 class OpenGLReadbackImpl : public OpenGLReadback {
51 public:
OpenGLReadbackImpl(renderthread::RenderThread & thread)52     OpenGLReadbackImpl(renderthread::RenderThread& thread) : OpenGLReadback(thread) {}
53 
54     /**
55      * Copies the layer's contents into the provided bitmap.
56      */
57     static bool copyLayerInto(renderthread::RenderThread& renderThread, GlLayer& layer,
58                               SkBitmap* bitmap);
59 
60 protected:
61     virtual CopyResult copyImageInto(EGLImageKHR eglImage, const Matrix4& imgTransform,
62                                      int imgWidth, int imgHeight, const Rect& srcRect,
63                                      SkBitmap* bitmap) override;
64 };
65 
66 }  // namespace uirenderer
67 }  // namespace android
68