/*
* Copyright (C) 2013 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 com.android.draw9patch.ui;
import com.android.draw9patch.graphics.GraphicsUtilities;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class CorruptPatch {
public static List<Rectangle> findBadPatches(BufferedImage image, PatchInfo patchInfo) {
List<Rectangle> corruptedPatches = new ArrayList<Rectangle>();
for (Rectangle patch : patchInfo.patches) {
if (corruptPatch(image, patch)) {
corruptedPatches.add(patch);
}
}
for (Rectangle patch : patchInfo.horizontalPatches) {
if (corruptHorizontalPatch(image, patch)) {
corruptedPatches.add(patch);
}
}
for (Rectangle patch : patchInfo.verticalPatches) {
if (corruptVerticalPatch(image, patch)) {
corruptedPatches.add(patch);
}
}
return corruptedPatches;
}
private static boolean corruptPatch(BufferedImage image, Rectangle patch) {
int[] pixels = GraphicsUtilities.getPixels(image, patch.x, patch.y,
patch.width, patch.height, null);
if (pixels.length > 0) {
int reference = pixels[0];
for (int pixel : pixels) {
if (pixel != reference) {
return true;
}
}
}
return false;
}
private static boolean corruptHorizontalPatch(BufferedImage image, Rectangle patch) {
int[] reference = new int[patch.height];
int[] column = new int[patch.height];
reference = GraphicsUtilities.getPixels(image, patch.x, patch.y,
1, patch.height, reference);
for (int i = 1; i < patch.width; i++) {
column = GraphicsUtilities.getPixels(image, patch.x + i, patch.y,
1, patch.height, column);
if (!Arrays.equals(reference, column)) {
return true;
}
}
return false;
}
private static boolean corruptVerticalPatch(BufferedImage image, Rectangle patch) {
int[] reference = new int[patch.width];
int[] row = new int[patch.width];
reference = GraphicsUtilities.getPixels(image, patch.x, patch.y,
patch.width, 1, reference);
for (int i = 1; i < patch.height; i++) {
row = GraphicsUtilities.getPixels(image, patch.x, patch.y + i, patch.width, 1, row);
if (!Arrays.equals(reference, row)) {
return true;
}
}
return false;
}
}