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 
19 #include <SkBlendMode.h>
20 
21 class ShadowShaderAnimation;
22 
23 static TestScene::Registrar _ShadowShader(TestScene::Info{
24         "shadowshader",
25         "A set of overlapping shadowed areas with simple tessellation useful for"
26         " benchmarking shadow shader performance.",
27         TestScene::simpleCreateScene<ShadowShaderAnimation>});
28 
29 class ShadowShaderAnimation : public TestScene {
30 public:
31     std::vector<sp<RenderNode> > cards;
createContent(int width,int height,Canvas & canvas)32     void createContent(int width, int height, Canvas& canvas) override {
33         canvas.drawColor(0xFFFFFFFF, SkBlendMode::kSrcOver);
34         canvas.enableZ(true);
35 
36         int outset = 50;
37         for (int i = 0; i < 10; i++) {
38             sp<RenderNode> card =
39                     createCard(outset, outset, width - (outset * 2), height - (outset * 2));
40             canvas.drawRenderNode(card.get());
41             cards.push_back(card);
42         }
43 
44         canvas.enableZ(false);
45     }
doFrame(int frameNr)46     void doFrame(int frameNr) override {
47         int curFrame = frameNr % 10;
48         for (size_t ci = 0; ci < cards.size(); ci++) {
49             cards[ci]->mutateStagingProperties().setTranslationX(curFrame);
50             cards[ci]->mutateStagingProperties().setTranslationY(curFrame);
51             cards[ci]->setPropertyFieldsDirty(RenderNode::X | RenderNode::Y);
52         }
53     }
54 
55 private:
createCard(int x,int y,int width,int height)56     sp<RenderNode> createCard(int x, int y, int width, int height) {
57         return TestUtils::createNode(x, y, x + width, y + height,
58                                      [width, height](RenderProperties& props, Canvas& canvas) {
59                                          props.setElevation(1000);
60 
61                                          // Set 0 radius, no clipping, so shadow is easy to compute.
62                                          // Slightly transparent outline
63                                          // to signal contents aren't opaque (not necessary though,
64                                          // as elevation is so high, no
65                                          // inner content to cut out)
66                                          props.mutableOutline().setRoundRect(0, 0, width, height, 0,
67                                                                              0.99f);
68                                          props.mutableOutline().setShouldClip(false);
69 
70                                          // don't draw anything to card's canvas - we just want the
71                                          // shadow
72                                      });
73     }
74 };
75