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