+++ /dev/null
-/*
- * Copyright (C) 2008 Google Inc.
- *
- * 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.google.zxing.client.android;
-
-import android.graphics.Bitmap;
-import com.google.zxing.BlackPointEstimationMethod;
-import com.google.zxing.MonochromeBitmapSource;
-import com.google.zxing.ReaderException;
-import com.google.zxing.common.BitArray;
-import com.google.zxing.common.BlackPointEstimator;
-
-/**
- * This object implements MonochromeBitmapSource around an Android Bitmap. Rather than capturing an
- * RGB image and calculating the grey value at each pixel, we ask the camera driver for YUV data and
- * strip out the luminance channel directly. This should be faster but provides fewer bits, i.e.
- * fewer grey levels.
- *
- * @author dswitkin@google.com (Daniel Switkin)
- * @author srowen@google.com (Sean Owen)
- * @deprecated
- */
-@Deprecated
-final class YUVMonochromeBitmapSource implements MonochromeBitmapSource {
-
- private final Bitmap image;
- private int blackPoint;
- private BlackPointEstimationMethod lastMethod;
- private int lastArgument;
-
- private static final int LUMINANCE_BITS = 5;
- private static final int LUMINANCE_SHIFT = 8 - LUMINANCE_BITS;
- private static final int LUMINANCE_BUCKETS = 1 << LUMINANCE_BITS;
-
- YUVMonochromeBitmapSource(Bitmap image) {
- this.image = image;
- blackPoint = 0x7F;
- lastMethod = null;
- lastArgument = 0;
- }
-
- public boolean isBlack(int x, int y) {
- return ((image.getPixel(x, y) >> 16) & 0xFF) < blackPoint;
- }
-
- public BitArray getBlackRow(int y, BitArray row, int startX, int getWidth) {
- if (row == null) {
- row = new BitArray(getWidth);
- } else {
- row.clear();
- }
- int[] pixelRow = new int[getWidth];
- image.getPixels(pixelRow, 0, getWidth, startX, y, getWidth, 1);
- for (int i = 0; i < getWidth; i++) {
- if (((pixelRow[i] >> 16) & 0xFF) < blackPoint) {
- row.set(i);
- }
- }
- return row;
- }
-
- public int getHeight() {
- return image.height();
- }
-
- public int getWidth() {
- return image.width();
- }
-
- public void estimateBlackPoint(BlackPointEstimationMethod method, int argument) throws ReaderException {
- if (!method.equals(lastMethod) || argument != lastArgument) {
- int width = image.width();
- int height = image.height();
- int[] histogram = new int[LUMINANCE_BUCKETS];
- if (method.equals(BlackPointEstimationMethod.TWO_D_SAMPLING)) {
- int minDimension = width < height ? width : height;
- int startI = height == minDimension ? 0 : (height - width) >> 1;
- int startJ = width == minDimension ? 0 : (width - height) >> 1;
- for (int n = 0; n < minDimension; n++) {
- int pixel = image.getPixel(startJ + n, startI + n);
- histogram[((pixel >> 16) & 0xFF) >> LUMINANCE_SHIFT]++;
- }
- } else if (method.equals(BlackPointEstimationMethod.ROW_SAMPLING)) {
- if (argument < 0 || argument >= height) {
- throw new IllegalArgumentException("Row is not within the image: " + argument);
- }
- int[] pixelRow = new int[width];
- image.getPixels(pixelRow, 0, width, 0, argument, width, 1);
- for (int x = 0; x < width; x++) {
- histogram[((pixelRow[x] >> 16) & 0xFF) >> LUMINANCE_SHIFT]++;
- }
- } else {
- throw new IllegalArgumentException("Unknown method: " + method);
- }
- blackPoint = BlackPointEstimator.estimate(histogram) << LUMINANCE_SHIFT;
- lastMethod = method;
- lastArgument = argument;
- }
- }
-
- public BlackPointEstimationMethod getLastEstimationMethod() {
- return lastMethod;
- }
-
- public MonochromeBitmapSource rotateCounterClockwise() {
- throw new IllegalStateException("Rotate not supported");
- }
-
- public boolean isRotateSupported() {
- return false;
- }
-
-}
\ No newline at end of file