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 package android.view.cts.util; 18 19 import android.graphics.Bitmap; 20 import android.graphics.Canvas; 21 import android.graphics.Color; 22 import android.graphics.Paint; 23 import android.graphics.Rect; 24 import android.util.Pair; 25 import android.view.View; 26 27 import junit.framework.Assert; 28 29 import java.util.List; 30 31 public class DrawingUtils { 32 /** 33 * Checks the pixels in the specified {@link View}. This methods draws the view into an 34 * offscreen bitmap and checks each pixel to match the expected color. The expected color 35 * of each pixel is either the color associated with the {@link Rect} that contains it, 36 * or the default color in case none of the rectangles cover that pixel. 37 * 38 * In case of a mismatch this method will call {@link Assert#fail(String)} 39 * with detailed description of the mismatch. 40 */ 41 public static void assertAllPixelsOfColor(String failMessagePrefix, View view, 42 int defaultColor, List<Pair<Rect, Integer>> colorRectangles) { 43 final int viewWidth = view.getWidth(); 44 final int viewHeight = view.getHeight(); 45 // Create a bitmap that matches the size of our view 46 final Bitmap bitmap = Bitmap.createBitmap(viewWidth, viewHeight, Bitmap.Config.ARGB_8888); 47 // Create a canvas that wraps the bitmap 48 final Canvas canvas = new Canvas(bitmap); 49 // And ask the view to draw itself to the canvas / bitmap 50 view.draw(canvas); 51 52 // Now create a golden bitmap based on the colors passed to us 53 final Bitmap goldenBitmap = Bitmap.createBitmap(viewWidth, viewHeight, 54 Bitmap.Config.ARGB_8888); 55 // Create a canvas that wraps the bitmap 56 final Canvas goldenCanvas = new Canvas(goldenBitmap); 57 // Fill it with default color 58 final Paint goldenPaint = new Paint(); 59 goldenPaint.setStyle(Paint.Style.FILL_AND_STROKE); 60 goldenPaint.setColor(defaultColor); 61 goldenCanvas.drawRect(0, 0, viewWidth, viewHeight, goldenPaint); 62 if (colorRectangles != null) { 63 for (Pair<Rect, Integer> colorRectangle : colorRectangles) { 64 goldenPaint.setColor(colorRectangle.second); 65 goldenCanvas.drawRect(colorRectangle.first, goldenPaint); 66 } 67 } 68 69 // Compare bitmap pixels (row-wise) 70 try { 71 int[] rowPixels = new int[viewWidth]; 72 int[] rowGoldenPixels = new int[viewWidth]; 73 for (int row = 0; row < viewHeight; row++) { 74 bitmap.getPixels(rowPixels, 0, viewWidth, 0, row, viewWidth, 1); 75 goldenBitmap.getPixels(rowGoldenPixels, 0, viewWidth, 0, row, viewWidth, 1); 76 for (int column = 0; column < viewWidth; column++) { 77 int expectedPixelColor = rowGoldenPixels[column]; 78 int actualPixelColor = rowPixels[column]; 79 if (rowPixels[column] != expectedPixelColor) { 80 String mismatchDescription = failMessagePrefix 81 + ": expected all drawable colors to be [" 82 + Color.alpha(expectedPixelColor) + "," 83 + Color.red(expectedPixelColor) + "," 84 + Color.green(expectedPixelColor) + "," 85 + Color.blue(expectedPixelColor) 86 + "] but at position (" + row + "," + column + ") found [" 87 + Color.alpha(actualPixelColor) + "," 88 + Color.red(actualPixelColor) + "," 89 + Color.green(actualPixelColor) + "," 90 + Color.blue(actualPixelColor) + "]"; 91 Assert.fail(mismatchDescription); 92 } 93 } 94 } 95 } finally { 96 bitmap.recycle(); 97 goldenBitmap.recycle(); 98 } 99 } 100 } 101
