1 /* 2 * Copyright (C) 2016 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 #include "tests/common/TestListViewSceneBase.h" 19 #include "hwui/Paint.h" 20 #include <SkGradientShader.h> 21 22 class ListOfFadedTextAnimation; 23 24 static TestScene::Registrar _ListOfFadedTextAnimation(TestScene::Info{ 25 "fadingedges", 26 "A mock ListView of scrolling text with faded edge. Doesn't re-bind/re-record views" 27 "as they are recycled, so won't upload much content (either glyphs, or bitmaps).", 28 TestScene::simpleCreateScene<ListOfFadedTextAnimation>}); 29 30 class ListOfFadedTextAnimation : public TestListViewSceneBase { 31 void createListItem(RenderProperties& props, Canvas& canvas, int id, int itemWidth, 32 int itemHeight) override { 33 canvas.drawColor(Color::White, SkBlendMode::kSrcOver); 34 int length = dp(100); 35 canvas.saveLayer(0, 0, length, itemHeight, nullptr, SaveFlags::HasAlphaLayer); 36 Paint textPaint; 37 textPaint.getSkFont().setSize(dp(20)); 38 textPaint.setAntiAlias(true); 39 TestUtils::drawUtf8ToCanvas(&canvas, "not that long long text", textPaint, dp(10), dp(30)); 40 41 SkPoint pts[2]; 42 pts[0].set(0, 0); 43 pts[1].set(0, 1); 44 45 SkColor colors[2] = {Color::Black, Color::Transparent}; 46 sk_sp<SkShader> s( 47 SkGradientShader::MakeLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode)); 48 49 SkMatrix matrix; 50 matrix.setScale(1, length); 51 matrix.postRotate(-90); 52 SkPaint fadingPaint; 53 fadingPaint.setShader(s->makeWithLocalMatrix(matrix)); 54 fadingPaint.setBlendMode(SkBlendMode::kDstOut); 55 canvas.drawRect(0, 0, length, itemHeight, fadingPaint); 56 canvas.restore(); 57 } 58 }; 59
