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/*
* Copyright (C) 2016 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 "tests/common/TestListViewSceneBase.h"
#include "hwui/Paint.h"
#include <SkGradientShader.h>
class ListOfFadedTextAnimation;
static TestScene::Registrar _ListOfFadedTextAnimation(TestScene::Info{
"fadingedges",
"A mock ListView of scrolling text with faded edge. Doesn't re-bind/re-record views"
"as they are recycled, so won't upload much content (either glyphs, or bitmaps).",
TestScene::simpleCreateScene<ListOfFadedTextAnimation>});
class ListOfFadedTextAnimation : public TestListViewSceneBase {
void createListItem(RenderProperties& props, Canvas& canvas, int id, int itemWidth,
int itemHeight) override {
canvas.drawColor(Color::White, SkBlendMode::kSrcOver);
int length = dp(100);
canvas.saveLayer(0, 0, length, itemHeight, nullptr);
Paint textPaint;
textPaint.getSkFont().setSize(dp(20));
textPaint.setAntiAlias(true);
TestUtils::drawUtf8ToCanvas(&canvas, "not that long long text", textPaint, dp(10), dp(30));
SkPoint pts[2];
pts[0].set(0, 0);
pts[1].set(0, 1);
SkColor colors[2] = {Color::Black, Color::Transparent};
sk_sp<SkShader> s(
SkGradientShader::MakeLinear(pts, colors, NULL, 2, SkTileMode::kClamp));
SkMatrix matrix;
matrix.setScale(1, length);
matrix.postRotate(-90);
Paint fadingPaint;
fadingPaint.setShader(s->makeWithLocalMatrix(matrix));
fadingPaint.setBlendMode(SkBlendMode::kDstOut);
canvas.drawRect(0, 0, length, itemHeight, fadingPaint);
canvas.restore();
}
};
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