| /* |
| * Copyright (C) 2014 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.uirendering.cts.bitmapverifiers; |
| |
| import android.graphics.Bitmap; |
| import android.graphics.Color; |
| import android.uirendering.cts.testinfrastructure.ActivityTestBase; |
| import android.uirendering.cts.util.CompareUtils; |
| import android.util.Log; |
| |
| /** |
| * This class looks at every pixel in a given bitmap and verifies that it is correct. |
| */ |
| public abstract class PerPixelBitmapVerifier extends BitmapVerifier { |
| private static final String TAG = "PerPixelBitmapVerifer"; |
| public static final int DEFAULT_THRESHOLD = 48; |
| |
| // total color difference tolerated without the pixel failing |
| private int mColorTolerance; |
| |
| // portion of bitmap allowed to fail pixel check |
| private float mSpatialTolerance; |
| |
| public PerPixelBitmapVerifier() { |
| this(DEFAULT_THRESHOLD, 0); |
| } |
| |
| public PerPixelBitmapVerifier(int colorTolerance) { |
| this(colorTolerance, 0); |
| } |
| |
| public PerPixelBitmapVerifier(int colorTolerance, float spatialTolerance) { |
| mColorTolerance = colorTolerance; |
| mSpatialTolerance = spatialTolerance; |
| } |
| |
| protected int getExpectedColor(int x, int y) { |
| return Color.WHITE; |
| } |
| |
| public boolean verify(int[] bitmap, int offset, int stride, int width, int height) { |
| int failures = 0; |
| int[] differenceMap = new int[bitmap.length]; |
| for (int y = 0 ; y < height ; y++) { |
| for (int x = 0 ; x < width ; x++) { |
| int index = indexFromXAndY(x, y, stride, offset); |
| if (!verifyPixel(x, y, bitmap[index])) { |
| if (failures < 50) { |
| Log.d(TAG, "Expected : " + Integer.toHexString(getExpectedColor(x, y)) |
| + " received : " + Integer.toHexString(bitmap[index]) |
| + " at position (" + x + "," + y + ")"); |
| } |
| failures++; |
| differenceMap[index] = FAIL_COLOR; |
| } else { |
| differenceMap[index] = PASS_COLOR; |
| } |
| } |
| } |
| int toleratedFailures = (int) (mSpatialTolerance * width * height); |
| boolean success = failures <= toleratedFailures; |
| Log.d(TAG, failures + " failures observed out of " |
| + toleratedFailures + " tolerated failures"); |
| if (!success) { |
| mDifferenceBitmap = Bitmap.createBitmap(ActivityTestBase.TEST_WIDTH, |
| ActivityTestBase.TEST_HEIGHT, Bitmap.Config.ARGB_8888); |
| mDifferenceBitmap.setPixels(differenceMap, offset, stride, 0, 0, |
| ActivityTestBase.TEST_WIDTH, ActivityTestBase.TEST_HEIGHT); |
| } |
| return success; |
| } |
| |
| |
| protected boolean verifyPixel(int x, int y, int observedColor) { |
| int expectedColor = getExpectedColor(x, y); |
| return CompareUtils.verifyPixelWithThreshold(observedColor, expectedColor, mColorTolerance); |
| } |
| } |