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
21namespace android {
22namespace uirenderer {
23
24class Matrix4;
25class GlLayer;
26
27class OpenGLReadback : public Readback {
28public:
29    virtual CopyResult copySurfaceInto(Surface& surface, const Rect& srcRect,
30            SkBitmap* bitmap) override;
31    virtual CopyResult copyGraphicBufferInto(GraphicBuffer* graphicBuffer,
32            SkBitmap* bitmap) override;
33
34protected:
35    explicit OpenGLReadback(renderthread::RenderThread& thread) : Readback(thread) {}
36    virtual ~OpenGLReadback() {}
37
38    virtual CopyResult copyImageInto(EGLImageKHR eglImage, const Matrix4& imgTransform,
39            int imgWidth, int imgHeight, const Rect& srcRect, SkBitmap* bitmap) = 0;
40private:
41    CopyResult copyGraphicBufferInto(GraphicBuffer* graphicBuffer, Matrix4& texTransform,
42            const Rect& srcRect, SkBitmap* bitmap);
43};
44
45class OpenGLReadbackImpl : public OpenGLReadback {
46public:
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
55protected:
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