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-rw-r--r--libraries/zxing/src/com/google/zxing/qrcode/encoder/MaskUtil.java218
1 files changed, 0 insertions, 218 deletions
diff --git a/libraries/zxing/src/com/google/zxing/qrcode/encoder/MaskUtil.java b/libraries/zxing/src/com/google/zxing/qrcode/encoder/MaskUtil.java
deleted file mode 100644
index 61ccf48c1..000000000
--- a/libraries/zxing/src/com/google/zxing/qrcode/encoder/MaskUtil.java
+++ /dev/null
@@ -1,218 +0,0 @@
-/*
- * Copyright 2008 ZXing authors
- *
- * 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.qrcode.encoder;
-
-/**
- * @author satorux@google.com (Satoru Takabayashi) - creator
- * @author dswitkin@google.com (Daniel Switkin) - ported from C++
- */
-public final class MaskUtil {
-
- private MaskUtil() {
- // do nothing
- }
-
- // Apply mask penalty rule 1 and return the penalty. Find repetitive cells with the same color and
- // give penalty to them. Example: 00000 or 11111.
- public static int applyMaskPenaltyRule1(ByteMatrix matrix) {
- return applyMaskPenaltyRule1Internal(matrix, true) + applyMaskPenaltyRule1Internal(matrix, false);
- }
-
- // Apply mask penalty rule 2 and return the penalty. Find 2x2 blocks with the same color and give
- // penalty to them.
- public static int applyMaskPenaltyRule2(ByteMatrix matrix) {
- int penalty = 0;
- byte[][] array = matrix.getArray();
- int width = matrix.getWidth();
- int height = matrix.getHeight();
- for (int y = 0; y < height - 1; ++y) {
- for (int x = 0; x < width - 1; ++x) {
- int value = array[y][x];
- if (value == array[y][x + 1] && value == array[y + 1][x] && value == array[y + 1][x + 1]) {
- penalty += 3;
- }
- }
- }
- return penalty;
- }
-
- // Apply mask penalty rule 3 and return the penalty. Find consecutive cells of 00001011101 or
- // 10111010000, and give penalty to them. If we find patterns like 000010111010000, we give
- // penalties twice (i.e. 40 * 2).
- public static int applyMaskPenaltyRule3(ByteMatrix matrix) {
- int penalty = 0;
- byte[][] array = matrix.getArray();
- int width = matrix.getWidth();
- int height = matrix.getHeight();
- for (int y = 0; y < height; ++y) {
- for (int x = 0; x < width; ++x) {
- // Tried to simplify following conditions but failed.
- if (x + 6 < width &&
- array[y][x] == 1 &&
- array[y][x + 1] == 0 &&
- array[y][x + 2] == 1 &&
- array[y][x + 3] == 1 &&
- array[y][x + 4] == 1 &&
- array[y][x + 5] == 0 &&
- array[y][x + 6] == 1 &&
- ((x + 10 < width &&
- array[y][x + 7] == 0 &&
- array[y][x + 8] == 0 &&
- array[y][x + 9] == 0 &&
- array[y][x + 10] == 0) ||
- (x - 4 >= 0 &&
- array[y][x - 1] == 0 &&
- array[y][x - 2] == 0 &&
- array[y][x - 3] == 0 &&
- array[y][x - 4] == 0))) {
- penalty += 40;
- }
- if (y + 6 < height &&
- array[y][x] == 1 &&
- array[y + 1][x] == 0 &&
- array[y + 2][x] == 1 &&
- array[y + 3][x] == 1 &&
- array[y + 4][x] == 1 &&
- array[y + 5][x] == 0 &&
- array[y + 6][x] == 1 &&
- ((y + 10 < height &&
- array[y + 7][x] == 0 &&
- array[y + 8][x] == 0 &&
- array[y + 9][x] == 0 &&
- array[y + 10][x] == 0) ||
- (y - 4 >= 0 &&
- array[y - 1][x] == 0 &&
- array[y - 2][x] == 0 &&
- array[y - 3][x] == 0 &&
- array[y - 4][x] == 0))) {
- penalty += 40;
- }
- }
- }
- return penalty;
- }
-
- // Apply mask penalty rule 4 and return the penalty. Calculate the ratio of dark cells and give
- // penalty if the ratio is far from 50%. It gives 10 penalty for 5% distance. Examples:
- // - 0% => 100
- // - 40% => 20
- // - 45% => 10
- // - 50% => 0
- // - 55% => 10
- // - 55% => 20
- // - 100% => 100
- public static int applyMaskPenaltyRule4(ByteMatrix matrix) {
- int numDarkCells = 0;
- byte[][] array = matrix.getArray();
- int width = matrix.getWidth();
- int height = matrix.getHeight();
- for (int y = 0; y < height; ++y) {
- for (int x = 0; x < width; ++x) {
- if (array[y][x] == 1) {
- numDarkCells += 1;
- }
- }
- }
- int numTotalCells = matrix.getHeight() * matrix.getWidth();
- double darkRatio = (double) numDarkCells / numTotalCells;
- return Math.abs((int) (darkRatio * 100 - 50)) / 5 * 10;
- }
-
- // Return the mask bit for "getMaskPattern" at "x" and "y". See 8.8 of JISX0510:2004 for mask
- // pattern conditions.
- public static boolean getDataMaskBit(int maskPattern, int x, int y) {
- if (!QRCode.isValidMaskPattern(maskPattern)) {
- throw new IllegalArgumentException("Invalid mask pattern");
- }
- int intermediate;
- int temp;
- switch (maskPattern) {
- case 0:
- intermediate = (y + x) & 0x1;
- break;
- case 1:
- intermediate = y & 0x1;
- break;
- case 2:
- intermediate = x % 3;
- break;
- case 3:
- intermediate = (y + x) % 3;
- break;
- case 4:
- intermediate = ((y >>> 1) + (x / 3)) & 0x1;
- break;
- case 5:
- temp = y * x;
- intermediate = (temp & 0x1) + (temp % 3);
- break;
- case 6:
- temp = y * x;
- intermediate = ((temp & 0x1) + (temp % 3)) & 0x1;
- break;
- case 7:
- temp = y * x;
- intermediate = ((temp % 3) + ((y + x) & 0x1)) & 0x1;
- break;
- default:
- throw new IllegalArgumentException("Invalid mask pattern: " + maskPattern);
- }
- return intermediate == 0;
- }
-
- // Helper function for applyMaskPenaltyRule1. We need this for doing this calculation in both
- // vertical and horizontal orders respectively.
- private static int applyMaskPenaltyRule1Internal(ByteMatrix matrix, boolean isHorizontal) {
- int penalty = 0;
- int numSameBitCells = 0;
- int prevBit = -1;
- // Horizontal mode:
- // for (int i = 0; i < matrix.height(); ++i) {
- // for (int j = 0; j < matrix.width(); ++j) {
- // int bit = matrix.get(i, j);
- // Vertical mode:
- // for (int i = 0; i < matrix.width(); ++i) {
- // for (int j = 0; j < matrix.height(); ++j) {
- // int bit = matrix.get(j, i);
- int iLimit = isHorizontal ? matrix.getHeight() : matrix.getWidth();
- int jLimit = isHorizontal ? matrix.getWidth() : matrix.getHeight();
- byte[][] array = matrix.getArray();
- for (int i = 0; i < iLimit; ++i) {
- for (int j = 0; j < jLimit; ++j) {
- int bit = isHorizontal ? array[i][j] : array[j][i];
- if (bit == prevBit) {
- numSameBitCells += 1;
- // Found five repetitive cells with the same color (bit).
- // We'll give penalty of 3.
- if (numSameBitCells == 5) {
- penalty += 3;
- } else if (numSameBitCells > 5) {
- // After five repetitive cells, we'll add the penalty one
- // by one.
- penalty += 1;
- }
- } else {
- numSameBitCells = 1; // Include the cell itself.
- prevBit = bit;
- }
- }
- numSameBitCells = 0; // Clear at each row/column.
- }
- return penalty;
- }
-
-}
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