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 SaveLayerAnimation;
20 
21 static TestScene::Registrar _SaveLayer(TestScene::Info{
22         "savelayer",
23         "A nested pair of clipped saveLayer operations. "
24         "Tests the clipped saveLayer codepath. Draws content into offscreen buffers and back "
25         "again.",
26         TestScene::simpleCreateScene<SaveLayerAnimation>});
27 
28 class SaveLayerAnimation : public TestScene {
29 public:
30     sp<RenderNode> card;
createContent(int width,int height,Canvas & canvas)31     void createContent(int width, int height, Canvas& canvas) override {
32         canvas.drawColor(Color::White, SkBlendMode::kSrcOver);  // background
33 
34         card = TestUtils::createNode(0, 0, 400, 800, [](RenderProperties& props, Canvas& canvas) {
35             // nested clipped saveLayers
36             canvas.saveLayerAlpha(0, 0, 400, 400, 200, SaveFlags::ClipToLayer);
37             canvas.drawColor(Color::Green_700, SkBlendMode::kSrcOver);
38             canvas.clipRect(50, 50, 350, 350, SkClipOp::kIntersect);
39             canvas.saveLayerAlpha(100, 100, 300, 300, 128, SaveFlags::ClipToLayer);
40             canvas.drawColor(Color::Blue_500, SkBlendMode::kSrcOver);
41             canvas.restore();
42             canvas.restore();
43 
44             // single unclipped saveLayer
45             canvas.save(SaveFlags::MatrixClip);
46             canvas.translate(0, 400);
47             canvas.saveLayerAlpha(100, 100, 300, 300, 128, SaveFlags::Flags(0));  // unclipped
48             Paint paint;
49             paint.setAntiAlias(true);
50             paint.setColor(Color::Green_700);
51             canvas.drawCircle(200, 200, 200, paint);
52             canvas.restore();
53             canvas.restore();
54         });
55 
56         canvas.drawRenderNode(card.get());
57     }
doFrame(int frameNr)58     void doFrame(int frameNr) override {
59         int curFrame = frameNr % 150;
60         card->mutateStagingProperties().setTranslationX(curFrame);
61         card->mutateStagingProperties().setTranslationY(curFrame);
62         card->setPropertyFieldsDirty(RenderNode::X | RenderNode::Y);
63     }
64 };
65