1 /*
2  * Copyright (C) 2017 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 #include "renderthread/RenderProxy.h"
19 #include "utils/Color.h"
20 #include "hwui/Paint.h"
21 
22 #include <SkBitmap.h>
23 #include <SkBlendMode.h>
24 #include <SkFont.h>
25 
26 class MagnifierAnimation;
27 
28 using Rect = android::uirenderer::Rect;
29 
30 static TestScene::Registrar _Magnifier(TestScene::Info{
31         "magnifier", "A sample magnifier using Readback",
32         TestScene::simpleCreateScene<MagnifierAnimation>});
33 
34 class BlockingCopyRequest : public CopyRequest {
35     sk_sp<Bitmap> mDestination;
36     std::mutex mLock;
37     std::condition_variable mCondVar;
38     CopyResult mResult;
39 
40 public:
BlockingCopyRequest(::Rect rect,sk_sp<Bitmap> bitmap)41     BlockingCopyRequest(::Rect rect, sk_sp<Bitmap> bitmap)
42             : CopyRequest(rect), mDestination(bitmap) {}
43 
getDestinationBitmap(int srcWidth,int srcHeight)44     virtual SkBitmap getDestinationBitmap(int srcWidth, int srcHeight) override {
45         SkBitmap bitmap;
46         mDestination->getSkBitmap(&bitmap);
47         return bitmap;
48     }
49 
onCopyFinished(CopyResult result)50     virtual void onCopyFinished(CopyResult result) override {
51         std::unique_lock _lock{mLock};
52         mResult = result;
53         mCondVar.notify_all();
54     }
55 
waitForResult()56     CopyResult waitForResult() {
57         std::unique_lock _lock{mLock};
58         mCondVar.wait(_lock);
59         return mResult;
60     }
61 };
62 
63 class MagnifierAnimation : public TestScene {
64 public:
65     sp<RenderNode> card;
66     sp<RenderNode> zoomImageView;
67     sk_sp<Bitmap> magnifier;
68     std::shared_ptr<BlockingCopyRequest> copyRequest;
69 
createContent(int width,int height,Canvas & canvas)70     void createContent(int width, int height, Canvas& canvas) override {
71         magnifier = TestUtils::createBitmap(200, 100);
72         setupCopyRequest();
73         SkBitmap temp;
74         magnifier->getSkBitmap(&temp);
75         temp.eraseColor(Color::White);
76         canvas.drawColor(Color::White, SkBlendMode::kSrcOver);
77         card = TestUtils::createNode(
78                 0, 0, width, height, [&](RenderProperties& props, Canvas& canvas) {
79                     Paint paint;
80                     paint.setAntiAlias(true);
81                     paint.getSkFont().setSize(50);
82 
83                     paint.setColor(Color::Black);
84                     TestUtils::drawUtf8ToCanvas(&canvas, "Test string", paint, 10, 400);
85                 });
86         canvas.drawRenderNode(card.get());
87         zoomImageView = TestUtils::createNode(
88                 100, 100, 500, 300, [&](RenderProperties& props, Canvas& canvas) {
89                     props.setElevation(dp(16));
90                     props.mutableOutline().setRoundRect(0, 0, props.getWidth(), props.getHeight(),
91                                                         dp(6), 1);
92                     props.mutableOutline().setShouldClip(true);
93                     canvas.drawBitmap(*magnifier, 0.0f, 0.0f, (float)magnifier->width(),
94                                       (float)magnifier->height(), 0, 0, (float)props.getWidth(),
95                                       (float)props.getHeight(), nullptr);
96                 });
97         canvas.enableZ(true);
98         canvas.drawRenderNode(zoomImageView.get());
99         canvas.enableZ(false);
100     }
101 
setupCopyRequest()102     void setupCopyRequest() {
103         constexpr int x = 90;
104         constexpr int y = 325;
105         copyRequest = std::make_shared<BlockingCopyRequest>(
106                 ::Rect(x, y, x + magnifier->width(), y + magnifier->height()), magnifier);
107     }
108 
doFrame(int frameNr)109     void doFrame(int frameNr) override {
110         int curFrame = frameNr % 150;
111         card->mutateStagingProperties().setTranslationX(curFrame);
112         card->setPropertyFieldsDirty(RenderNode::X | RenderNode::Y);
113         if (renderTarget) {
114             RenderProxy::copySurfaceInto(renderTarget.get(), copyRequest);
115             copyRequest->waitForResult();
116         }
117     }
118 };
119