ShadowShaderAnimation.cpp revision 0091181f32f023282205f74806dfa5146bb7c75e 
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
19class ShadowShaderAnimation;
20
21static 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
28class ShadowShaderAnimation : public TestScene {
29public:
30    std::vector< sp<RenderNode> > cards;
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    }
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    }
53private:
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