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 #include "TestSceneBase.h"
18 
19 class ReadbackFromHardware;
20 
21 static TestScene::Registrar _SaveLayer(TestScene::Info{
22         "readbackFromHBitmap", "Allocates hardware bitmap and readback data from it.",
23         TestScene::simpleCreateScene<ReadbackFromHardware>});
24 
25 class ReadbackFromHardware : public TestScene {
26 public:
createHardwareBitmap()27     static sk_sp<Bitmap> createHardwareBitmap() {
28         SkBitmap skBitmap;
29         SkImageInfo info = SkImageInfo::Make(400, 400, kN32_SkColorType, kPremul_SkAlphaType);
30         skBitmap.allocPixels(info);
31         skBitmap.eraseColor(Color::Red_500);
32         SkCanvas canvas(skBitmap);
33         SkPaint paint;
34         paint.setColor(Color::Blue_500);
35         canvas.drawRect(SkRect::MakeXYWH(30, 30, 30, 150), paint);
36         canvas.drawRect(SkRect::MakeXYWH(30, 30, 100, 30), paint);
37         canvas.drawRect(SkRect::MakeXYWH(30, 100, 70, 30), paint);
38         return Bitmap::allocateHardwareBitmap(skBitmap);
39     }
40 
createContent(int width,int height,Canvas & canvas)41     void createContent(int width, int height, Canvas& canvas) override {
42         canvas.drawColor(Color::White, SkBlendMode::kSrcOver);  // background
43 
44         sk_sp<Bitmap> hardwareBitmap(createHardwareBitmap());
45 
46         SkBitmap readback;
47         hardwareBitmap->getSkBitmap(&readback);
48 
49         SkBitmap canvasBitmap;
50         sk_sp<Bitmap> heapBitmap(TestUtils::createBitmap(hardwareBitmap->width(),
51                                                          hardwareBitmap->height(), &canvasBitmap));
52 
53         SkCanvas skCanvas(canvasBitmap);
54         skCanvas.drawBitmap(readback, 0, 0);
55         canvas.drawBitmap(*heapBitmap, 0, 0, nullptr);
56 
57         canvas.drawBitmap(*hardwareBitmap, 0, 500, nullptr);
58     }
59 
doFrame(int frameNr)60     void doFrame(int frameNr) override {}
61 };
62