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mask util port and pass
This commit is contained in:
Henry Schimke
@@ -1,224 +0,0 @@
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/*
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* Copyright 2008 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.zxing.qrcode.encoder;
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/**
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* @author Satoru Takabayashi
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* @author Daniel Switkin
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* @author Sean Owen
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*/
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final class MaskUtil {
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// Penalty weights from section 6.8.2.1
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private static final int N1 = 3;
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private static final int N2 = 3;
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private static final int N3 = 40;
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private static final int N4 = 10;
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private MaskUtil() {
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// do nothing
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}
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/**
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* Apply mask penalty rule 1 and return the penalty. Find repetitive cells with the same color and
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* give penalty to them. Example: 00000 or 11111.
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*/
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static int applyMaskPenaltyRule1(ByteMatrix matrix) {
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return applyMaskPenaltyRule1Internal(matrix, true) + applyMaskPenaltyRule1Internal(matrix, false);
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}
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/**
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* Apply mask penalty rule 2 and return the penalty. Find 2x2 blocks with the same color and give
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* penalty to them. This is actually equivalent to the spec's rule, which is to find MxN blocks and give a
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* penalty proportional to (M-1)x(N-1), because this is the number of 2x2 blocks inside such a block.
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*/
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static int applyMaskPenaltyRule2(ByteMatrix matrix) {
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int penalty = 0;
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byte[][] array = matrix.getArray();
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int width = matrix.getWidth();
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int height = matrix.getHeight();
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for (int y = 0; y < height - 1; y++) {
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byte[] arrayY = array[y];
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for (int x = 0; x < width - 1; x++) {
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int value = arrayY[x];
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if (value == arrayY[x + 1] && value == array[y + 1][x] && value == array[y + 1][x + 1]) {
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penalty++;
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}
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}
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}
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return N2 * penalty;
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}
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/**
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* Apply mask penalty rule 3 and return the penalty. Find consecutive runs of 1:1:3:1:1:4
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* starting with black, or 4:1:1:3:1:1 starting with white, and give penalty to them. If we
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* find patterns like 000010111010000, we give penalty once.
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*/
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static int applyMaskPenaltyRule3(ByteMatrix matrix) {
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int numPenalties = 0;
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byte[][] array = matrix.getArray();
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int width = matrix.getWidth();
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int height = matrix.getHeight();
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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byte[] arrayY = array[y]; // We can at least optimize this access
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if (x + 6 < width &&
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arrayY[x] == 1 &&
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arrayY[x + 1] == 0 &&
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arrayY[x + 2] == 1 &&
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arrayY[x + 3] == 1 &&
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arrayY[x + 4] == 1 &&
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arrayY[x + 5] == 0 &&
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arrayY[x + 6] == 1 &&
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(isWhiteHorizontal(arrayY, x - 4, x) || isWhiteHorizontal(arrayY, x + 7, x + 11))) {
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numPenalties++;
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}
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if (y + 6 < height &&
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array[y][x] == 1 &&
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array[y + 1][x] == 0 &&
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array[y + 2][x] == 1 &&
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array[y + 3][x] == 1 &&
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array[y + 4][x] == 1 &&
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array[y + 5][x] == 0 &&
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array[y + 6][x] == 1 &&
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(isWhiteVertical(array, x, y - 4, y) || isWhiteVertical(array, x, y + 7, y + 11))) {
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numPenalties++;
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}
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}
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}
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return numPenalties * N3;
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}
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private static boolean isWhiteHorizontal(byte[] rowArray, int from, int to) {
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if (from < 0 || rowArray.length < to) {
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return false;
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}
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for (int i = from; i < to; i++) {
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if (rowArray[i] == 1) {
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return false;
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}
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}
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return true;
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}
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private static boolean isWhiteVertical(byte[][] array, int col, int from, int to) {
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if (from < 0 || array.length < to) {
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return false;
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}
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for (int i = from; i < to; i++) {
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if (array[i][col] == 1) {
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return false;
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}
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}
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return true;
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}
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/**
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* Apply mask penalty rule 4 and return the penalty. Calculate the ratio of dark cells and give
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* penalty if the ratio is far from 50%. It gives 10 penalty for 5% distance.
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*/
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static int applyMaskPenaltyRule4(ByteMatrix matrix) {
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int numDarkCells = 0;
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byte[][] array = matrix.getArray();
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int width = matrix.getWidth();
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int height = matrix.getHeight();
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for (int y = 0; y < height; y++) {
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byte[] arrayY = array[y];
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for (int x = 0; x < width; x++) {
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if (arrayY[x] == 1) {
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numDarkCells++;
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}
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}
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}
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int numTotalCells = matrix.getHeight() * matrix.getWidth();
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int fivePercentVariances = Math.abs(numDarkCells * 2 - numTotalCells) * 10 / numTotalCells;
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return fivePercentVariances * N4;
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}
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/**
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* Return the mask bit for "getMaskPattern" at "x" and "y". See 8.8 of JISX0510:2004 for mask
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* pattern conditions.
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*/
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static boolean getDataMaskBit(int maskPattern, int x, int y) {
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int intermediate;
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int temp;
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switch (maskPattern) {
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case 0:
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intermediate = (y + x) & 0x1;
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break;
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case 1:
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intermediate = y & 0x1;
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break;
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case 2:
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intermediate = x % 3;
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break;
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case 3:
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intermediate = (y + x) % 3;
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break;
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case 4:
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intermediate = ((y / 2) + (x / 3)) & 0x1;
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break;
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case 5:
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temp = y * x;
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intermediate = (temp & 0x1) + (temp % 3);
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break;
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case 6:
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temp = y * x;
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intermediate = ((temp & 0x1) + (temp % 3)) & 0x1;
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break;
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case 7:
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temp = y * x;
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intermediate = ((temp % 3) + ((y + x) & 0x1)) & 0x1;
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break;
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default:
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throw new IllegalArgumentException("Invalid mask pattern: " + maskPattern);
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}
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return intermediate == 0;
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}
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/**
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* Helper function for applyMaskPenaltyRule1. We need this for doing this calculation in both
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* vertical and horizontal orders respectively.
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*/
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private static int applyMaskPenaltyRule1Internal(ByteMatrix matrix, boolean isHorizontal) {
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int penalty = 0;
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int iLimit = isHorizontal ? matrix.getHeight() : matrix.getWidth();
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int jLimit = isHorizontal ? matrix.getWidth() : matrix.getHeight();
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byte[][] array = matrix.getArray();
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for (int i = 0; i < iLimit; i++) {
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int numSameBitCells = 0;
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int prevBit = -1;
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for (int j = 0; j < jLimit; j++) {
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int bit = isHorizontal ? array[i][j] : array[j][i];
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if (bit == prevBit) {
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numSameBitCells++;
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} else {
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if (numSameBitCells >= 5) {
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penalty += N1 + (numSameBitCells - 5);
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}
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numSameBitCells = 1; // Include the cell itself.
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prevBit = bit;
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}
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}
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if (numSameBitCells >= 5) {
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penalty += N1 + (numSameBitCells - 5);
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}
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}
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return penalty;
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}
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}
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@@ -1,279 +0,0 @@
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/*
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* Copyright 2008 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.zxing.qrcode.encoder;
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import org.junit.Assert;
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import org.junit.Test;
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/**
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* @author satorux@google.com (Satoru Takabayashi) - creator
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* @author mysen@google.com (Chris Mysen) - ported from C++
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*/
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public final class MaskUtilTestCase extends Assert {
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@Test
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public void testApplyMaskPenaltyRule1() {
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ByteMatrix matrix = new ByteMatrix(4, 1);
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matrix.set(0, 0, 0);
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matrix.set(1, 0, 0);
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matrix.set(2, 0, 0);
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matrix.set(3, 0, 0);
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assertEquals(0, MaskUtil.applyMaskPenaltyRule1(matrix));
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// Horizontal.
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matrix = new ByteMatrix(6, 1);
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matrix.set(0, 0, 0);
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matrix.set(1, 0, 0);
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matrix.set(2, 0, 0);
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matrix.set(3, 0, 0);
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matrix.set(4, 0, 0);
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matrix.set(5, 0, 1);
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assertEquals(3, MaskUtil.applyMaskPenaltyRule1(matrix));
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matrix.set(5, 0, 0);
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assertEquals(4, MaskUtil.applyMaskPenaltyRule1(matrix));
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// Vertical.
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matrix = new ByteMatrix(1, 6);
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matrix.set(0, 0, 0);
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matrix.set(0, 1, 0);
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matrix.set(0, 2, 0);
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matrix.set(0, 3, 0);
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matrix.set(0, 4, 0);
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matrix.set(0, 5, 1);
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assertEquals(3, MaskUtil.applyMaskPenaltyRule1(matrix));
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matrix.set(0, 5, 0);
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assertEquals(4, MaskUtil.applyMaskPenaltyRule1(matrix));
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}
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@Test
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public void testApplyMaskPenaltyRule2() {
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ByteMatrix matrix = new ByteMatrix(1, 1);
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matrix.set(0, 0, 0);
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assertEquals(0, MaskUtil.applyMaskPenaltyRule2(matrix));
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matrix = new ByteMatrix(2, 2);
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matrix.set(0, 0, 0);
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matrix.set(1, 0, 0);
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matrix.set(0, 1, 0);
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matrix.set(1, 1, 1);
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assertEquals(0, MaskUtil.applyMaskPenaltyRule2(matrix));
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matrix = new ByteMatrix(2, 2);
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matrix.set(0, 0, 0);
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matrix.set(1, 0, 0);
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matrix.set(0, 1, 0);
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matrix.set(1, 1, 0);
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assertEquals(3, MaskUtil.applyMaskPenaltyRule2(matrix));
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matrix = new ByteMatrix(3, 3);
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matrix.set(0, 0, 0);
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matrix.set(1, 0, 0);
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matrix.set(2, 0, 0);
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matrix.set(0, 1, 0);
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matrix.set(1, 1, 0);
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matrix.set(2, 1, 0);
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matrix.set(0, 2, 0);
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matrix.set(1, 2, 0);
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matrix.set(2, 2, 0);
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// Four instances of 2x2 blocks.
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assertEquals(3 * 4, MaskUtil.applyMaskPenaltyRule2(matrix));
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}
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@Test
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public void testApplyMaskPenaltyRule3() {
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// Horizontal 00001011101.
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ByteMatrix matrix = new ByteMatrix(11, 1);
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matrix.set(0, 0, 0);
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matrix.set(1, 0, 0);
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matrix.set(2, 0, 0);
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matrix.set(3, 0, 0);
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matrix.set(4, 0, 1);
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matrix.set(5, 0, 0);
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matrix.set(6, 0, 1);
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matrix.set(7, 0, 1);
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matrix.set(8, 0, 1);
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matrix.set(9, 0, 0);
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matrix.set(10, 0, 1);
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assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
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// Horizontal 10111010000.
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matrix = new ByteMatrix(11, 1);
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matrix.set(0, 0, 1);
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matrix.set(1, 0, 0);
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matrix.set(2, 0, 1);
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matrix.set(3, 0, 1);
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matrix.set(4, 0, 1);
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matrix.set(5, 0, 0);
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matrix.set(6, 0, 1);
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matrix.set(7, 0, 0);
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matrix.set(8, 0, 0);
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matrix.set(9, 0, 0);
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matrix.set(10, 0, 0);
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assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
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// Horizontal 1011101.
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matrix = new ByteMatrix(7, 1);
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matrix.set(0, 0, 1);
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matrix.set(1, 0, 0);
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matrix.set(2, 0, 1);
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matrix.set(3, 0, 1);
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matrix.set(4, 0, 1);
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matrix.set(5, 0, 0);
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matrix.set(6, 0, 1);
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assertEquals(0, MaskUtil.applyMaskPenaltyRule3(matrix));
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// Vertical 00001011101.
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matrix = new ByteMatrix(1, 11);
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matrix.set(0, 0, 0);
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matrix.set(0, 1, 0);
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matrix.set(0, 2, 0);
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matrix.set(0, 3, 0);
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matrix.set(0, 4, 1);
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matrix.set(0, 5, 0);
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matrix.set(0, 6, 1);
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matrix.set(0, 7, 1);
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matrix.set(0, 8, 1);
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matrix.set(0, 9, 0);
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matrix.set(0, 10, 1);
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assertEquals(40, MaskUtil.applyMaskPenaltyRule3(matrix));
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// Vertical 10111010000.
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matrix = new ByteMatrix(1, 11);
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matrix.set(0, 0, 1);
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matrix.set(0, 1, 0);
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matrix.set(0, 2, 1);
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matrix.set(0, 3, 1);
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matrix.set(0, 4, 1);
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matrix.set(0, 5, 0);
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matrix.set(0, 6, 1);
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matrix.set(0, 7, 0);
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matrix.set(0, 8, 0);
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matrix.set(0, 9, 0);
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matrix.set(0, 10, 0);
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// Vertical 1011101.
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matrix = new ByteMatrix(1, 7);
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matrix.set(0, 0, 1);
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matrix.set(0, 1, 0);
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matrix.set(0, 2, 1);
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matrix.set(0, 3, 1);
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matrix.set(0, 4, 1);
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matrix.set(0, 5, 0);
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matrix.set(0, 6, 1);
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assertEquals(0, MaskUtil.applyMaskPenaltyRule3(matrix));
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}
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@Test
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public void testApplyMaskPenaltyRule4() {
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// Dark cell ratio = 0%
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ByteMatrix matrix = new ByteMatrix(1, 1);
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matrix.set(0, 0, 0);
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assertEquals(100, MaskUtil.applyMaskPenaltyRule4(matrix));
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// Dark cell ratio = 5%
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matrix = new ByteMatrix(2, 1);
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matrix.set(0, 0, 0);
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matrix.set(0, 0, 1);
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assertEquals(0, MaskUtil.applyMaskPenaltyRule4(matrix));
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// Dark cell ratio = 66.67%
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matrix = new ByteMatrix(6, 1);
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matrix.set(0, 0, 0);
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matrix.set(1, 0, 1);
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matrix.set(2, 0, 1);
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matrix.set(3, 0, 1);
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matrix.set(4, 0, 1);
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matrix.set(5, 0, 0);
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assertEquals(30, MaskUtil.applyMaskPenaltyRule4(matrix));
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}
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private static boolean testGetDataMaskBitInternal(int maskPattern, int[][] expected) {
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for (int x = 0; x < 6; ++x) {
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for (int y = 0; y < 6; ++y) {
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if ((expected[y][x] == 1) != MaskUtil.getDataMaskBit(maskPattern, x, y)) {
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return false;
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}
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}
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}
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return true;
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}
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// See mask patterns on the page 43 of JISX0510:2004.
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@Test
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public void testGetDataMaskBit() {
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int[][] mask0 = {
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{1, 0, 1, 0, 1, 0},
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{0, 1, 0, 1, 0, 1},
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{1, 0, 1, 0, 1, 0},
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{0, 1, 0, 1, 0, 1},
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{1, 0, 1, 0, 1, 0},
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{0, 1, 0, 1, 0, 1},
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};
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assertTrue(testGetDataMaskBitInternal(0, mask0));
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int[][] mask1 = {
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{1, 1, 1, 1, 1, 1},
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{0, 0, 0, 0, 0, 0},
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{1, 1, 1, 1, 1, 1},
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{0, 0, 0, 0, 0, 0},
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{1, 1, 1, 1, 1, 1},
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{0, 0, 0, 0, 0, 0},
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};
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assertTrue(testGetDataMaskBitInternal(1, mask1));
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int[][] mask2 = {
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{1, 0, 0, 1, 0, 0},
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{1, 0, 0, 1, 0, 0},
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{1, 0, 0, 1, 0, 0},
|
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{1, 0, 0, 1, 0, 0},
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{1, 0, 0, 1, 0, 0},
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{1, 0, 0, 1, 0, 0},
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};
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assertTrue(testGetDataMaskBitInternal(2, mask2));
|
||||
int[][] mask3 = {
|
||||
{1, 0, 0, 1, 0, 0},
|
||||
{0, 0, 1, 0, 0, 1},
|
||||
{0, 1, 0, 0, 1, 0},
|
||||
{1, 0, 0, 1, 0, 0},
|
||||
{0, 0, 1, 0, 0, 1},
|
||||
{0, 1, 0, 0, 1, 0},
|
||||
};
|
||||
assertTrue(testGetDataMaskBitInternal(3, mask3));
|
||||
int[][] mask4 = {
|
||||
{1, 1, 1, 0, 0, 0},
|
||||
{1, 1, 1, 0, 0, 0},
|
||||
{0, 0, 0, 1, 1, 1},
|
||||
{0, 0, 0, 1, 1, 1},
|
||||
{1, 1, 1, 0, 0, 0},
|
||||
{1, 1, 1, 0, 0, 0},
|
||||
};
|
||||
assertTrue(testGetDataMaskBitInternal(4, mask4));
|
||||
int[][] mask5 = {
|
||||
{1, 1, 1, 1, 1, 1},
|
||||
{1, 0, 0, 0, 0, 0},
|
||||
{1, 0, 0, 1, 0, 0},
|
||||
{1, 0, 1, 0, 1, 0},
|
||||
{1, 0, 0, 1, 0, 0},
|
||||
{1, 0, 0, 0, 0, 0},
|
||||
};
|
||||
assertTrue(testGetDataMaskBitInternal(5, mask5));
|
||||
int[][] mask6 = {
|
||||
{1, 1, 1, 1, 1, 1},
|
||||
{1, 1, 1, 0, 0, 0},
|
||||
{1, 1, 0, 1, 1, 0},
|
||||
{1, 0, 1, 0, 1, 0},
|
||||
{1, 0, 1, 1, 0, 1},
|
||||
{1, 0, 0, 0, 1, 1},
|
||||
};
|
||||
assertTrue(testGetDataMaskBitInternal(6, mask6));
|
||||
int[][] mask7 = {
|
||||
{1, 0, 1, 0, 1, 0},
|
||||
{0, 0, 0, 1, 1, 1},
|
||||
{1, 0, 0, 0, 1, 1},
|
||||
{0, 1, 0, 1, 0, 1},
|
||||
{1, 1, 1, 0, 0, 0},
|
||||
{0, 1, 1, 1, 0, 0},
|
||||
};
|
||||
assertTrue(testGetDataMaskBitInternal(7, mask7));
|
||||
}
|
||||
}
|
||||
279
src/qrcode/encoder/MaskUtilTestCase.rs
Normal file
279
src/qrcode/encoder/MaskUtilTestCase.rs
Normal file
@@ -0,0 +1,279 @@
|
||||
/*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
use crate::qrcode::encoder::{mask_util, ByteMatrix};
|
||||
|
||||
/**
|
||||
* @author satorux@google.com (Satoru Takabayashi) - creator
|
||||
* @author mysen@google.com (Chris Mysen) - ported from C++
|
||||
*/
|
||||
|
||||
#[test]
|
||||
fn testApplyMaskPenaltyRule1() {
|
||||
let mut matrix = ByteMatrix::new(4, 1);
|
||||
matrix.set(0, 0, 0);
|
||||
matrix.set(1, 0, 0);
|
||||
matrix.set(2, 0, 0);
|
||||
matrix.set(3, 0, 0);
|
||||
assert_eq!(0, mask_util::applyMaskPenaltyRule1(&matrix));
|
||||
// Horizontal.
|
||||
let mut matrix = ByteMatrix::new(6, 1);
|
||||
matrix.set(0, 0, 0);
|
||||
matrix.set(1, 0, 0);
|
||||
matrix.set(2, 0, 0);
|
||||
matrix.set(3, 0, 0);
|
||||
matrix.set(4, 0, 0);
|
||||
matrix.set(5, 0, 1);
|
||||
assert_eq!(3, mask_util::applyMaskPenaltyRule1(&matrix));
|
||||
matrix.set(5, 0, 0);
|
||||
assert_eq!(4, mask_util::applyMaskPenaltyRule1(&matrix));
|
||||
// Vertical.
|
||||
let mut matrix = ByteMatrix::new(1, 6);
|
||||
matrix.set(0, 0, 0);
|
||||
matrix.set(0, 1, 0);
|
||||
matrix.set(0, 2, 0);
|
||||
matrix.set(0, 3, 0);
|
||||
matrix.set(0, 4, 0);
|
||||
matrix.set(0, 5, 1);
|
||||
assert_eq!(3, mask_util::applyMaskPenaltyRule1(&matrix));
|
||||
matrix.set(0, 5, 0);
|
||||
assert_eq!(4, mask_util::applyMaskPenaltyRule1(&matrix));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn testApplyMaskPenaltyRule2() {
|
||||
let mut matrix = ByteMatrix::new(1, 1);
|
||||
matrix.set(0, 0, 0);
|
||||
assert_eq!(0, mask_util::applyMaskPenaltyRule2(&matrix));
|
||||
let mut matrix = ByteMatrix::new(2, 2);
|
||||
matrix.set(0, 0, 0);
|
||||
matrix.set(1, 0, 0);
|
||||
matrix.set(0, 1, 0);
|
||||
matrix.set(1, 1, 1);
|
||||
assert_eq!(0, mask_util::applyMaskPenaltyRule2(&matrix));
|
||||
let mut matrix = ByteMatrix::new(2, 2);
|
||||
matrix.set(0, 0, 0);
|
||||
matrix.set(1, 0, 0);
|
||||
matrix.set(0, 1, 0);
|
||||
matrix.set(1, 1, 0);
|
||||
assert_eq!(3, mask_util::applyMaskPenaltyRule2(&matrix));
|
||||
let mut matrix = ByteMatrix::new(3, 3);
|
||||
matrix.set(0, 0, 0);
|
||||
matrix.set(1, 0, 0);
|
||||
matrix.set(2, 0, 0);
|
||||
matrix.set(0, 1, 0);
|
||||
matrix.set(1, 1, 0);
|
||||
matrix.set(2, 1, 0);
|
||||
matrix.set(0, 2, 0);
|
||||
matrix.set(1, 2, 0);
|
||||
matrix.set(2, 2, 0);
|
||||
// Four instances of 2x2 blocks.
|
||||
assert_eq!(3 * 4, mask_util::applyMaskPenaltyRule2(&matrix));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn testApplyMaskPenaltyRule3() {
|
||||
// Horizontal 00001011101.
|
||||
let mut matrix = ByteMatrix::new(11, 1);
|
||||
matrix.set(0, 0, 0);
|
||||
matrix.set(1, 0, 0);
|
||||
matrix.set(2, 0, 0);
|
||||
matrix.set(3, 0, 0);
|
||||
matrix.set(4, 0, 1);
|
||||
matrix.set(5, 0, 0);
|
||||
matrix.set(6, 0, 1);
|
||||
matrix.set(7, 0, 1);
|
||||
matrix.set(8, 0, 1);
|
||||
matrix.set(9, 0, 0);
|
||||
matrix.set(10, 0, 1);
|
||||
assert_eq!(40, mask_util::applyMaskPenaltyRule3(&matrix));
|
||||
// Horizontal 10111010000.
|
||||
let mut matrix = ByteMatrix::new(11, 1);
|
||||
matrix.set(0, 0, 1);
|
||||
matrix.set(1, 0, 0);
|
||||
matrix.set(2, 0, 1);
|
||||
matrix.set(3, 0, 1);
|
||||
matrix.set(4, 0, 1);
|
||||
matrix.set(5, 0, 0);
|
||||
matrix.set(6, 0, 1);
|
||||
matrix.set(7, 0, 0);
|
||||
matrix.set(8, 0, 0);
|
||||
matrix.set(9, 0, 0);
|
||||
matrix.set(10, 0, 0);
|
||||
assert_eq!(40, mask_util::applyMaskPenaltyRule3(&matrix));
|
||||
// Horizontal 1011101.
|
||||
let mut matrix = ByteMatrix::new(7, 1);
|
||||
matrix.set(0, 0, 1);
|
||||
matrix.set(1, 0, 0);
|
||||
matrix.set(2, 0, 1);
|
||||
matrix.set(3, 0, 1);
|
||||
matrix.set(4, 0, 1);
|
||||
matrix.set(5, 0, 0);
|
||||
matrix.set(6, 0, 1);
|
||||
assert_eq!(0, mask_util::applyMaskPenaltyRule3(&matrix));
|
||||
// Vertical 00001011101.
|
||||
let mut matrix = ByteMatrix::new(1, 11);
|
||||
matrix.set(0, 0, 0);
|
||||
matrix.set(0, 1, 0);
|
||||
matrix.set(0, 2, 0);
|
||||
matrix.set(0, 3, 0);
|
||||
matrix.set(0, 4, 1);
|
||||
matrix.set(0, 5, 0);
|
||||
matrix.set(0, 6, 1);
|
||||
matrix.set(0, 7, 1);
|
||||
matrix.set(0, 8, 1);
|
||||
matrix.set(0, 9, 0);
|
||||
matrix.set(0, 10, 1);
|
||||
assert_eq!(40, mask_util::applyMaskPenaltyRule3(&matrix));
|
||||
// Vertical 10111010000.
|
||||
let mut matrix = ByteMatrix::new(1, 11);
|
||||
matrix.set(0, 0, 1);
|
||||
matrix.set(0, 1, 0);
|
||||
matrix.set(0, 2, 1);
|
||||
matrix.set(0, 3, 1);
|
||||
matrix.set(0, 4, 1);
|
||||
matrix.set(0, 5, 0);
|
||||
matrix.set(0, 6, 1);
|
||||
matrix.set(0, 7, 0);
|
||||
matrix.set(0, 8, 0);
|
||||
matrix.set(0, 9, 0);
|
||||
matrix.set(0, 10, 0);
|
||||
// Vertical 1011101.
|
||||
let mut matrix = ByteMatrix::new(1, 7);
|
||||
matrix.set(0, 0, 1);
|
||||
matrix.set(0, 1, 0);
|
||||
matrix.set(0, 2, 1);
|
||||
matrix.set(0, 3, 1);
|
||||
matrix.set(0, 4, 1);
|
||||
matrix.set(0, 5, 0);
|
||||
matrix.set(0, 6, 1);
|
||||
assert_eq!(0, mask_util::applyMaskPenaltyRule3(&matrix));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn testApplyMaskPenaltyRule4() {
|
||||
// Dark cell ratio = 0%
|
||||
let mut matrix = ByteMatrix::new(1, 1);
|
||||
matrix.set(0, 0, 0);
|
||||
assert_eq!(100, mask_util::applyMaskPenaltyRule4(&matrix));
|
||||
// Dark cell ratio = 5%
|
||||
let mut matrix = ByteMatrix::new(2, 1);
|
||||
matrix.set(0, 0, 0);
|
||||
matrix.set(0, 0, 1);
|
||||
assert_eq!(0, mask_util::applyMaskPenaltyRule4(&matrix));
|
||||
// Dark cell ratio = 66.67%
|
||||
let mut matrix = ByteMatrix::new(6, 1);
|
||||
matrix.set(0, 0, 0);
|
||||
matrix.set(1, 0, 1);
|
||||
matrix.set(2, 0, 1);
|
||||
matrix.set(3, 0, 1);
|
||||
matrix.set(4, 0, 1);
|
||||
matrix.set(5, 0, 0);
|
||||
assert_eq!(30, mask_util::applyMaskPenaltyRule4(&matrix));
|
||||
}
|
||||
|
||||
fn testGetDataMaskBitInternal(maskPattern: u32, expected: &Vec<Vec<u32>>) -> bool {
|
||||
for x in 0..6 {
|
||||
// for (int x = 0; x < 6; ++x) {
|
||||
for y in 0..6 {
|
||||
// for (int y = 0; y < 6; ++y) {
|
||||
if (expected[y][x] == 1)
|
||||
!= mask_util::getDataMaskBit(maskPattern, x as u32, y as u32)
|
||||
.expect("should never fail")
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
// See mask patterns on the page 43 of JISX0510:2004.
|
||||
#[test]
|
||||
fn testGetDataMaskBit() {
|
||||
let mask0 = vec![
|
||||
vec![1, 0, 1, 0, 1, 0],
|
||||
vec![0, 1, 0, 1, 0, 1],
|
||||
vec![1, 0, 1, 0, 1, 0],
|
||||
vec![0, 1, 0, 1, 0, 1],
|
||||
vec![1, 0, 1, 0, 1, 0],
|
||||
vec![0, 1, 0, 1, 0, 1],
|
||||
];
|
||||
assert!(testGetDataMaskBitInternal(0, &mask0));
|
||||
let mask1 = vec![
|
||||
vec![1, 1, 1, 1, 1, 1],
|
||||
vec![0, 0, 0, 0, 0, 0],
|
||||
vec![1, 1, 1, 1, 1, 1],
|
||||
vec![0, 0, 0, 0, 0, 0],
|
||||
vec![1, 1, 1, 1, 1, 1],
|
||||
vec![0, 0, 0, 0, 0, 0],
|
||||
];
|
||||
assert!(testGetDataMaskBitInternal(1, &mask1));
|
||||
let mask2 = vec![
|
||||
vec![1, 0, 0, 1, 0, 0],
|
||||
vec![1, 0, 0, 1, 0, 0],
|
||||
vec![1, 0, 0, 1, 0, 0],
|
||||
vec![1, 0, 0, 1, 0, 0],
|
||||
vec![1, 0, 0, 1, 0, 0],
|
||||
vec![1, 0, 0, 1, 0, 0],
|
||||
];
|
||||
assert!(testGetDataMaskBitInternal(2, &mask2));
|
||||
let mask3 = vec![
|
||||
vec![1, 0, 0, 1, 0, 0],
|
||||
vec![0, 0, 1, 0, 0, 1],
|
||||
vec![0, 1, 0, 0, 1, 0],
|
||||
vec![1, 0, 0, 1, 0, 0],
|
||||
vec![0, 0, 1, 0, 0, 1],
|
||||
vec![0, 1, 0, 0, 1, 0],
|
||||
];
|
||||
assert!(testGetDataMaskBitInternal(3, &mask3));
|
||||
let mask4 = vec![
|
||||
vec![1, 1, 1, 0, 0, 0],
|
||||
vec![1, 1, 1, 0, 0, 0],
|
||||
vec![0, 0, 0, 1, 1, 1],
|
||||
vec![0, 0, 0, 1, 1, 1],
|
||||
vec![1, 1, 1, 0, 0, 0],
|
||||
vec![1, 1, 1, 0, 0, 0],
|
||||
];
|
||||
assert!(testGetDataMaskBitInternal(4, &mask4));
|
||||
let mask5 = vec![
|
||||
vec![1, 1, 1, 1, 1, 1],
|
||||
vec![1, 0, 0, 0, 0, 0],
|
||||
vec![1, 0, 0, 1, 0, 0],
|
||||
vec![1, 0, 1, 0, 1, 0],
|
||||
vec![1, 0, 0, 1, 0, 0],
|
||||
vec![1, 0, 0, 0, 0, 0],
|
||||
];
|
||||
assert!(testGetDataMaskBitInternal(5, &mask5));
|
||||
let mask6 = vec![
|
||||
vec![1, 1, 1, 1, 1, 1],
|
||||
vec![1, 1, 1, 0, 0, 0],
|
||||
vec![1, 1, 0, 1, 1, 0],
|
||||
vec![1, 0, 1, 0, 1, 0],
|
||||
vec![1, 0, 1, 1, 0, 1],
|
||||
vec![1, 0, 0, 0, 1, 1],
|
||||
];
|
||||
assert!(testGetDataMaskBitInternal(6, &mask6));
|
||||
let mask7 = vec![
|
||||
vec![1, 0, 1, 0, 1, 0],
|
||||
vec![0, 0, 0, 1, 1, 1],
|
||||
vec![1, 0, 0, 0, 1, 1],
|
||||
vec![0, 1, 0, 1, 0, 1],
|
||||
vec![1, 1, 1, 0, 0, 0],
|
||||
vec![0, 1, 1, 1, 0, 0],
|
||||
];
|
||||
assert!(testGetDataMaskBitInternal(7, &mask7));
|
||||
}
|
||||
269
src/qrcode/encoder/mask_util.rs
Normal file
269
src/qrcode/encoder/mask_util.rs
Normal file
@@ -0,0 +1,269 @@
|
||||
/*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
use crate::Exceptions;
|
||||
|
||||
use super::ByteMatrix;
|
||||
|
||||
/**
|
||||
* @author Satoru Takabayashi
|
||||
* @author Daniel Switkin
|
||||
* @author Sean Owen
|
||||
*/
|
||||
|
||||
// Penalty weights from section 6.8.2.1
|
||||
const N1: u32 = 3;
|
||||
const N2: u32 = 3;
|
||||
const N3: u32 = 40;
|
||||
const N4: u32 = 10;
|
||||
|
||||
/**
|
||||
* 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.
|
||||
*/
|
||||
pub fn applyMaskPenaltyRule1(matrix: &ByteMatrix) -> u32 {
|
||||
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. This is actually equivalent to the spec's rule, which is to find MxN blocks and give a
|
||||
* penalty proportional to (M-1)x(N-1), because this is the number of 2x2 blocks inside such a block.
|
||||
*/
|
||||
pub fn applyMaskPenaltyRule2(matrix: &ByteMatrix) -> u32 {
|
||||
let mut penalty = 0;
|
||||
let array = matrix.getArray();
|
||||
let width = matrix.getWidth();
|
||||
let height = matrix.getHeight();
|
||||
for y in 0..(height -1) as usize {
|
||||
// for (int y = 0; y < height - 1; y++) {
|
||||
let arrayY = &array[y];
|
||||
for x in 0..(width -1) as usize {
|
||||
// for (int x = 0; x < width - 1; x++) {
|
||||
let value = arrayY[x];
|
||||
if value == arrayY[x + 1] && value == array[y + 1][x] && value == array[y + 1][x + 1] {
|
||||
penalty += 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
N2 * penalty
|
||||
}
|
||||
|
||||
/**
|
||||
* Apply mask penalty rule 3 and return the penalty. Find consecutive runs of 1:1:3:1:1:4
|
||||
* starting with black, or 4:1:1:3:1:1 starting with white, and give penalty to them. If we
|
||||
* find patterns like 000010111010000, we give penalty once.
|
||||
*/
|
||||
pub fn applyMaskPenaltyRule3(matrix: &ByteMatrix) -> u32 {
|
||||
let mut numPenalties = 0;
|
||||
let array = matrix.getArray();
|
||||
let width = matrix.getWidth();
|
||||
let height = matrix.getHeight();
|
||||
for y in 0..height as usize {
|
||||
// for (int y = 0; y < height; y++) {
|
||||
for x in 0..width as usize {
|
||||
// for (int x = 0; x < width; x++) {
|
||||
let arrayY = &array[y]; // We can at least optimize this access
|
||||
if x + 6 < width as usize
|
||||
&& arrayY[x] == 1
|
||||
&& arrayY[x + 1] == 0
|
||||
&& arrayY[x + 2] == 1
|
||||
&& arrayY[x + 3] == 1
|
||||
&& arrayY[x + 4] == 1
|
||||
&& arrayY[x + 5] == 0
|
||||
&& arrayY[x + 6] == 1
|
||||
&& (isWhiteHorizontal(&arrayY, x as i32 - 4, x as u32)
|
||||
|| isWhiteHorizontal(&arrayY, x as i32 + 7, x as u32 + 11))
|
||||
{
|
||||
numPenalties += 1;
|
||||
}
|
||||
if y + 6 < height as usize
|
||||
&& 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
|
||||
&& (isWhiteVertical(array, x as u32, y as i32 - 4, y as u32)
|
||||
|| isWhiteVertical(array, x as u32, y as i32 + 7, y as u32 + 11))
|
||||
{
|
||||
numPenalties += 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
numPenalties * N3
|
||||
}
|
||||
|
||||
pub fn isWhiteHorizontal(rowArray: &[u8], from: i32, to: u32) -> bool {
|
||||
if from < 0 || rowArray.len() < to as usize {
|
||||
return false;
|
||||
}
|
||||
for i in from..to as i32 {
|
||||
// for (int i = from; i < to; i++) {
|
||||
if rowArray[i as usize] == 1 {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
pub fn isWhiteVertical(array: &Vec<Vec<u8>>, col: u32, from: i32, to: u32) -> bool {
|
||||
if from < 0 || array.len() < to as usize {
|
||||
return false;
|
||||
}
|
||||
for i in from..to as i32 {
|
||||
// for (int i = from; i < to; i++) {
|
||||
if array[i as usize][col as usize] == 1 {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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.
|
||||
*/
|
||||
pub fn applyMaskPenaltyRule4(matrix: &ByteMatrix) -> u32 {
|
||||
let mut numDarkCells = 0;
|
||||
let array = matrix.getArray();
|
||||
let width = matrix.getWidth();
|
||||
let height = matrix.getHeight();
|
||||
for y in 0..height as usize {
|
||||
// for (int y = 0; y < height; y++) {
|
||||
let arrayY = &array[y];
|
||||
for x in 0..width as usize {
|
||||
// for (int x = 0; x < width; x++) {
|
||||
if arrayY[x] == 1 {
|
||||
numDarkCells += 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
let numTotalCells = matrix.getHeight() * matrix.getWidth();
|
||||
let fivePercentVariances = (numDarkCells as i64 * 2 - numTotalCells as i64).abs() as u32 * 10 / numTotalCells;
|
||||
return fivePercentVariances * N4;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the mask bit for "getMaskPattern" at "x" and "y". See 8.8 of JISX0510:2004 for mask
|
||||
* pattern conditions.
|
||||
*/
|
||||
pub fn getDataMaskBit(maskPattern: u32, x: u32, y: u32) -> Result<bool, Exceptions> {
|
||||
let intermediate = match maskPattern {
|
||||
0 => (y + x) & 0x1,
|
||||
1 => y & 0x1,
|
||||
2 => x % 3,
|
||||
3 => (y + x) % 3,
|
||||
4 => ((y / 2) + (x / 3)) & 0x1,
|
||||
5 => {
|
||||
let temp = y * x;
|
||||
(temp & 0x1) + (temp % 3)
|
||||
}
|
||||
6 => {
|
||||
let temp = y * x;
|
||||
((temp & 0x1) + (temp % 3)) & 0x1
|
||||
}
|
||||
7 => {
|
||||
let temp = y * x;
|
||||
((temp % 3) + ((y + x) & 0x1)) & 0x1
|
||||
}
|
||||
_ => {
|
||||
return Err(Exceptions::IllegalArgumentException(format!(
|
||||
"Invalid mask pattern: {}",
|
||||
maskPattern
|
||||
)))
|
||||
}
|
||||
};
|
||||
// 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 / 2) + (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);
|
||||
// }
|
||||
Ok(intermediate == 0)
|
||||
}
|
||||
|
||||
/**
|
||||
* Helper function for applyMaskPenaltyRule1. We need this for doing this calculation in both
|
||||
* vertical and horizontal orders respectively.
|
||||
*/
|
||||
fn applyMaskPenaltyRule1Internal(matrix: &ByteMatrix, isHorizontal: bool) -> u32 {
|
||||
let mut penalty = 0;
|
||||
let iLimit = if isHorizontal {
|
||||
matrix.getHeight()
|
||||
} else {
|
||||
matrix.getWidth()
|
||||
};
|
||||
let jLimit = if isHorizontal {
|
||||
matrix.getWidth()
|
||||
} else {
|
||||
matrix.getHeight()
|
||||
};
|
||||
let array = matrix.getArray();
|
||||
for i in 0..iLimit as usize {
|
||||
// for (int i = 0; i < iLimit; i++) {
|
||||
let mut numSameBitCells = 0;
|
||||
// let prevBit = -1;
|
||||
let mut prevBit = 0;
|
||||
for j in 0..jLimit as usize {
|
||||
// for (int j = 0; j < jLimit; j++) {
|
||||
let bit = if isHorizontal {
|
||||
array[i][j]
|
||||
} else {
|
||||
array[j][i]
|
||||
};
|
||||
if bit == prevBit {
|
||||
numSameBitCells += 1;
|
||||
} else {
|
||||
if numSameBitCells >= 5 {
|
||||
penalty += N1 + (numSameBitCells - 5);
|
||||
}
|
||||
numSameBitCells = 1; // Include the cell itself.
|
||||
prevBit = bit;
|
||||
}
|
||||
}
|
||||
if numSameBitCells >= 5 {
|
||||
penalty += N1 + (numSameBitCells - 5);
|
||||
}
|
||||
}
|
||||
return penalty;
|
||||
}
|
||||
@@ -1,6 +1,7 @@
|
||||
mod qr_code;
|
||||
mod byte_matrix;
|
||||
mod block_pair;
|
||||
pub mod mask_util;
|
||||
|
||||
pub use qr_code::*;
|
||||
pub use byte_matrix::*;
|
||||
@@ -9,4 +10,6 @@ pub use block_pair::*;
|
||||
#[cfg(test)]
|
||||
mod QRCodeTestCase;
|
||||
#[cfg(test)]
|
||||
mod BitVectorTestCase;
|
||||
mod BitVectorTestCase;
|
||||
#[cfg(test)]
|
||||
mod MaskUtilTestCase;
|
||||
Reference in New Issue
Block a user