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", 23 "Allocates hardware bitmap and readback data from it.", 24 TestScene::simpleCreateScene<ReadbackFromHardware> 25 }); 26 27 class ReadbackFromHardware : public TestScene { 28 public: createHardwareBitmap()29 static sk_sp<Bitmap> createHardwareBitmap() { 30 SkBitmap skBitmap; 31 SkImageInfo info = SkImageInfo::Make(400, 400, kN32_SkColorType, kPremul_SkAlphaType); 32 skBitmap.allocPixels(info); 33 skBitmap.eraseColor(Color::Red_500); 34 SkCanvas canvas(skBitmap); 35 SkPaint paint; 36 paint.setColor(Color::Blue_500); 37 canvas.drawRect(SkRect::MakeXYWH(30, 30, 30, 150), paint); 38 canvas.drawRect(SkRect::MakeXYWH(30, 30, 100, 30), paint); 39 canvas.drawRect(SkRect::MakeXYWH(30, 100, 70, 30), paint); 40 return Bitmap::allocateHardwareBitmap(skBitmap); 41 } 42 createContent(int width,int height,Canvas & canvas)43 void createContent(int width, int height, Canvas& canvas) override { 44 canvas.drawColor(Color::White, SkBlendMode::kSrcOver); // background 45 46 sk_sp<Bitmap> hardwareBitmap(createHardwareBitmap()); 47 48 SkBitmap readback; 49 hardwareBitmap->getSkBitmap(&readback); 50 51 SkBitmap canvasBitmap; 52 sk_sp<Bitmap> heapBitmap(TestUtils::createBitmap(hardwareBitmap->width(), 53 hardwareBitmap->height(), &canvasBitmap)); 54 55 SkCanvas skCanvas(canvasBitmap); 56 skCanvas.drawBitmap(readback, 0, 0); 57 canvas.drawBitmap(*heapBitmap, 0, 0, nullptr); 58 59 canvas.drawBitmap(*hardwareBitmap, 0, 500, nullptr); 60 } 61 doFrame(int frameNr)62 void doFrame(int frameNr) override { } 63 }; 64