66 lines
2.7 KiB
C++
66 lines
2.7 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "TestSceneBase.h"
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#include <SkGradientShader.h>
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class SimpleGradientAnimation;
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static TestScene::Registrar _SimpleGradient(TestScene::Info{
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"simpleGradient",
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"A benchmark of shader performance of linear, 2 color gradients with black in them.",
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TestScene::simpleCreateScene<SimpleGradientAnimation>});
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class SimpleGradientAnimation : public TestScene {
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public:
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std::vector<sp<RenderNode> > cards;
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void createContent(int width, int height, Canvas& canvas) override {
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canvas.drawColor(Color::White, SkBlendMode::kSrcOver);
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sp<RenderNode> card = createCard(0, 0, width, height);
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canvas.drawRenderNode(card.get());
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cards.push_back(card);
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}
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void doFrame(int frameNr) override {
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int curFrame = frameNr % 20;
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for (size_t ci = 0; ci < cards.size(); ci++) {
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cards[ci]->mutateStagingProperties().setTranslationX(curFrame);
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cards[ci]->mutateStagingProperties().setTranslationY(curFrame);
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cards[ci]->setPropertyFieldsDirty(RenderNode::X | RenderNode::Y);
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}
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}
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private:
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sp<RenderNode> createCard(int x, int y, int width, int height) {
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return TestUtils::createNode(
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x, y, x + width, y + height,
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[width, height](RenderProperties& props, Canvas& canvas) {
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float pos[] = {0, 1};
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SkPoint pts[] = {SkPoint::Make(0, 0), SkPoint::Make(width, height)};
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Paint paint;
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// overdraw several times to emphasize shader cost
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for (int i = 0; i < 10; i++) {
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// use i%2 start position to pick 2 color combo with black in it
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SkColor colors[3] = {Color::Transparent, Color::Black, Color::Cyan_500};
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paint.setShader(SkGradientShader::MakeLinear(pts, colors + (i % 2), pos, 2,
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SkTileMode::kClamp));
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canvas.drawRect(i, i, width, height, paint);
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}
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});
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}
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};
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