| /* |
| * 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.Canvas; |
| import android.graphics.Color; |
| import android.graphics.ColorMatrix; |
| import android.graphics.ColorMatrixColorFilter; |
| import android.graphics.Paint; |
| import android.graphics.Bitmap.Config; |
| |
| import junit.framework.TestCase; |
| |
| public class ColorMatrixColorFilterTest extends TestCase { |
| |
| private static final int TOLERANCE = 1; |
| |
| public void testColorMatrixColorFilter() { |
| ColorMatrixColorFilter filter; |
| |
| ColorMatrix cm = new ColorMatrix(); |
| float[] blueToCyan = new float[] { |
| 1f, 0f, 0f, 0f, 0f, |
| 0f, 1f, 1f, 0f, 0f, |
| 0f, 0f, 1f, 0f, 0f, |
| 0f, 0f, 0f, 1f, 0f }; |
| cm.set(blueToCyan); |
| filter = new ColorMatrixColorFilter(cm); |
| Bitmap bitmap = Bitmap.createBitmap(1, 1, Config.ARGB_8888); |
| Canvas canvas = new Canvas(bitmap); |
| Paint paint = new Paint(); |
| paint.setColor(Color.BLUE); |
| paint.setColorFilter(filter); |
| canvas.drawPoint(0, 0, paint); |
| assertColor(Color.CYAN, bitmap.getPixel(0, 0)); |
| paint.setColor(Color.GREEN); |
| canvas.drawPoint(0, 0, paint); |
| assertColor(Color.GREEN, bitmap.getPixel(0, 0)); |
| paint.setColor(Color.RED); |
| canvas.drawPoint(0, 0, paint); |
| assertColor(Color.RED, bitmap.getPixel(0, 0)); |
| // color components are clipped, not scaled |
| paint.setColor(Color.MAGENTA); |
| canvas.drawPoint(0, 0, paint); |
| assertColor(Color.WHITE, bitmap.getPixel(0, 0)); |
| |
| float[] transparentRedAddBlue = new float[] { |
| 1f, 0f, 0f, 0f, 0f, |
| 0f, 1f, 0f, 0f, 0f, |
| 0f, 0f, 1f, 0f, 64f, |
| -0.5f, 0f, 0f, 1f, 0f |
| }; |
| filter = new ColorMatrixColorFilter(transparentRedAddBlue); |
| paint.setColorFilter(filter); |
| paint.setColor(Color.RED); |
| bitmap.eraseColor(Color.TRANSPARENT); |
| canvas.drawPoint(0, 0, paint); |
| assertColor(Color.argb(128, 255, 0, 64), bitmap.getPixel(0, 0)); |
| paint.setColor(Color.CYAN); |
| canvas.drawPoint(0, 0, paint); |
| // blue gets clipped |
| assertColor(Color.CYAN, bitmap.getPixel(0, 0)); |
| |
| // change array to filter out green |
| assertEquals(1f, transparentRedAddBlue[6]); |
| transparentRedAddBlue[6] = 0f; |
| // changing the array has no effect |
| canvas.drawPoint(0, 0, paint); |
| assertColor(Color.CYAN, bitmap.getPixel(0, 0)); |
| // create a new filter with the changed matrix |
| paint.setColorFilter(new ColorMatrixColorFilter(transparentRedAddBlue)); |
| canvas.drawPoint(0, 0, paint); |
| assertColor(Color.BLUE, bitmap.getPixel(0, 0)); |
| } |
| |
| private void assertColor(int expected, int actual) { |
| assertEquals(Color.red(expected), Color.red(actual), TOLERANCE); |
| assertEquals(Color.green(expected), Color.green(actual), TOLERANCE); |
| assertEquals(Color.blue(expected), Color.blue(actual), TOLERANCE); |
| assertEquals(Color.alpha(expected), Color.alpha(actual), TOLERANCE); |
| } |
| } |