| /* |
| * Copyright (C) 2009 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. |
| */ |
| package android.graphics.cts; |
| |
| |
| import android.graphics.Bitmap; |
| import android.graphics.BlurMaskFilter; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.Paint; |
| import android.graphics.Bitmap.Config; |
| import android.graphics.BlurMaskFilter.Blur; |
| import android.util.Log; |
| |
| import junit.framework.TestCase; |
| |
| public class BlurMaskFilterTest extends TestCase { |
| private static final int OFFSET = 10; |
| private static final int RADIUS = 5; |
| private static final int BITMAP_WIDTH = 100; |
| private static final int BITMAP_HEIGHT = 100; |
| private static final int CENTER = BITMAP_HEIGHT / 2; |
| |
| public void testBlurMaskFilter(){ |
| BlurMaskFilter filter = new BlurMaskFilter(RADIUS, Blur.NORMAL); |
| Paint paint = new Paint(); |
| paint.setMaskFilter(filter); |
| paint.setColor(Color.RED); |
| Bitmap b = Bitmap.createBitmap(BITMAP_WIDTH, BITMAP_HEIGHT, Config.ARGB_8888); |
| b.eraseColor(Color.TRANSPARENT); |
| Canvas canvas = new Canvas(b); |
| canvas.drawRect(CENTER - OFFSET, CENTER - OFFSET, CENTER + OFFSET, CENTER + OFFSET, paint); |
| for (int x = 0; x < CENTER; x++) { |
| for (int y = 0; y < CENTER; y++) { |
| if (x < CENTER - OFFSET - RADIUS || y < CENTER - OFFSET - RADIUS) { |
| // check that color didn't bleed (much) beyond radius |
| checkQuadrants(Color.TRANSPARENT, b, x, y, 5); |
| } else if (x > CENTER - OFFSET + RADIUS && y > CENTER - OFFSET + RADIUS) { |
| // check that color didn't wash out (much) in the center |
| checkQuadrants(Color.RED, b, x, y, 5); |
| } else { |
| // check blur zone, color should remain, alpha varies |
| checkQuadrants(Color.RED, b, x, y, 255); |
| } |
| } |
| } |
| } |
| |
| private void checkQuadrants(int color, Bitmap bitmap, int x, int y, int alphaTolerance) { |
| int right = bitmap.getWidth() - 1; |
| int bottom = bitmap.getHeight() - 1; |
| try { |
| checkColor(color, bitmap.getPixel(x, y), alphaTolerance); |
| checkColor(color, bitmap.getPixel(right - x, y), alphaTolerance); |
| checkColor(color, bitmap.getPixel(x, bottom - y), alphaTolerance); |
| checkColor(color, bitmap.getPixel(right - x, bottom - y), alphaTolerance); |
| } catch (Error e) { |
| Log.w(getClass().getName(), "Failed for coordinates (" + x + ", " + y + ")"); |
| throw e; |
| } |
| } |
| |
| private void checkColor(int expected, int actual, int alphaTolerance) { |
| assertEquals(Color.red(expected), Color.red(actual)); |
| assertEquals(Color.green(expected), Color.green(actual)); |
| assertEquals(Color.blue(expected), Color.blue(actual)); |
| assertEquals(Color.alpha(expected), Color.alpha(actual), alphaTolerance); |
| } |
| } |