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 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 31 class ListOfFadedTextAnimation : public TestListViewSceneBase { 32 void createListItem(RenderProperties& props, Canvas& canvas, int id, 33 int itemWidth, int itemHeight) override { 34 canvas.drawColor(Color::White, SkBlendMode::kSrcOver); 35 int length = dp(100); 36 canvas.saveLayer(0, 0, length, itemHeight, nullptr, SaveFlags::HasAlphaLayer); 37 SkPaint textPaint; 38 textPaint.setTextSize(dp(20)); 39 textPaint.setAntiAlias(true); 40 TestUtils::drawUtf8ToCanvas(&canvas, "not that long long text", textPaint, dp(10), dp(30)); 41 42 SkPoint pts[2]; 43 pts[0].set(0, 0); 44 pts[1].set(0, 1); 45 46 SkColor colors[2] = {Color::Black, Color::Transparent}; 47 sk_sp<SkShader> s(SkGradientShader::MakeLinear(pts, colors, NULL, 2, 48 SkShader::kClamp_TileMode)); 49 50 SkMatrix matrix; 51 matrix.setScale(1, length); 52 matrix.postRotate(-90); 53 SkPaint fadingPaint; 54 fadingPaint.setShader(s->makeWithLocalMatrix(matrix)); 55 fadingPaint.setBlendMode(SkBlendMode::kDstOut); 56 canvas.drawRect(0, 0, length, itemHeight, fadingPaint); 57 canvas.restore(); 58 } 59 }; 60
