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