diff options
Diffstat (limited to 'libraries/zxing/src/com/google/zxing/qrcode/decoder')
8 files changed, 1763 insertions, 0 deletions
diff --git a/libraries/zxing/src/com/google/zxing/qrcode/decoder/BitMatrixParser.java b/libraries/zxing/src/com/google/zxing/qrcode/decoder/BitMatrixParser.java new file mode 100644 index 000000000..9d131a554 --- /dev/null +++ b/libraries/zxing/src/com/google/zxing/qrcode/decoder/BitMatrixParser.java @@ -0,0 +1,203 @@ +/*
+ * Copyright 2007 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.decoder;
+
+import com.google.zxing.FormatException;
+import com.google.zxing.common.BitMatrix;
+
+/**
+ * @author Sean Owen
+ */
+final class BitMatrixParser {
+
+ private final BitMatrix bitMatrix;
+ private Version parsedVersion;
+ private FormatInformation parsedFormatInfo;
+
+ /**
+ * @param bitMatrix {@link BitMatrix} to parse
+ * @throws FormatException if dimension is not >= 21 and 1 mod 4
+ */
+ BitMatrixParser(BitMatrix bitMatrix) throws FormatException {
+ int dimension = bitMatrix.getHeight();
+ if (dimension < 21 || (dimension & 0x03) != 1) {
+ throw FormatException.getFormatInstance();
+ }
+ this.bitMatrix = bitMatrix;
+ }
+
+ /**
+ * <p>Reads format information from one of its two locations within the QR Code.</p>
+ *
+ * @return {@link FormatInformation} encapsulating the QR Code's format info
+ * @throws FormatException if both format information locations cannot be parsed as
+ * the valid encoding of format information
+ */
+ FormatInformation readFormatInformation() throws FormatException {
+
+ if (parsedFormatInfo != null) {
+ return parsedFormatInfo;
+ }
+
+ // Read top-left format info bits
+ int formatInfoBits1 = 0;
+ for (int i = 0; i < 6; i++) {
+ formatInfoBits1 = copyBit(i, 8, formatInfoBits1);
+ }
+ // .. and skip a bit in the timing pattern ...
+ formatInfoBits1 = copyBit(7, 8, formatInfoBits1);
+ formatInfoBits1 = copyBit(8, 8, formatInfoBits1);
+ formatInfoBits1 = copyBit(8, 7, formatInfoBits1);
+ // .. and skip a bit in the timing pattern ...
+ for (int j = 5; j >= 0; j--) {
+ formatInfoBits1 = copyBit(8, j, formatInfoBits1);
+ }
+
+ // Read the top-right/bottom-left pattern too
+ int dimension = bitMatrix.getHeight();
+ int formatInfoBits2 = 0;
+ int jMin = dimension - 7;
+ for (int j = dimension - 1; j >= jMin; j--) {
+ formatInfoBits2 = copyBit(8, j, formatInfoBits2);
+ }
+ for (int i = dimension - 8; i < dimension; i++) {
+ formatInfoBits2 = copyBit(i, 8, formatInfoBits2);
+ }
+
+ parsedFormatInfo = FormatInformation.decodeFormatInformation(formatInfoBits1, formatInfoBits2);
+ if (parsedFormatInfo != null) {
+ return parsedFormatInfo;
+ }
+ throw FormatException.getFormatInstance();
+ }
+
+ /**
+ * <p>Reads version information from one of its two locations within the QR Code.</p>
+ *
+ * @return {@link Version} encapsulating the QR Code's version
+ * @throws FormatException if both version information locations cannot be parsed as
+ * the valid encoding of version information
+ */
+ Version readVersion() throws FormatException {
+
+ if (parsedVersion != null) {
+ return parsedVersion;
+ }
+
+ int dimension = bitMatrix.getHeight();
+
+ int provisionalVersion = (dimension - 17) >> 2;
+ if (provisionalVersion <= 6) {
+ return Version.getVersionForNumber(provisionalVersion);
+ }
+
+ // Read top-right version info: 3 wide by 6 tall
+ int versionBits = 0;
+ int ijMin = dimension - 11;
+ for (int j = 5; j >= 0; j--) {
+ for (int i = dimension - 9; i >= ijMin; i--) {
+ versionBits = copyBit(i, j, versionBits);
+ }
+ }
+
+ parsedVersion = Version.decodeVersionInformation(versionBits);
+ if (parsedVersion != null && parsedVersion.getDimensionForVersion() == dimension) {
+ return parsedVersion;
+ }
+
+ // Hmm, failed. Try bottom left: 6 wide by 3 tall
+ versionBits = 0;
+ for (int i = 5; i >= 0; i--) {
+ for (int j = dimension - 9; j >= ijMin; j--) {
+ versionBits = copyBit(i, j, versionBits);
+ }
+ }
+
+ parsedVersion = Version.decodeVersionInformation(versionBits);
+ if (parsedVersion != null && parsedVersion.getDimensionForVersion() == dimension) {
+ return parsedVersion;
+ }
+ throw FormatException.getFormatInstance();
+ }
+
+ private int copyBit(int i, int j, int versionBits) {
+ return bitMatrix.get(i, j) ? (versionBits << 1) | 0x1 : versionBits << 1;
+ }
+
+ /**
+ * <p>Reads the bits in the {@link BitMatrix} representing the finder pattern in the
+ * correct order in order to reconstitute the codewords bytes contained within the
+ * QR Code.</p>
+ *
+ * @return bytes encoded within the QR Code
+ * @throws FormatException if the exact number of bytes expected is not read
+ */
+ byte[] readCodewords() throws FormatException {
+
+ FormatInformation formatInfo = readFormatInformation();
+ Version version = readVersion();
+
+ // Get the data mask for the format used in this QR Code. This will exclude
+ // some bits from reading as we wind through the bit matrix.
+ DataMask dataMask = DataMask.forReference((int) formatInfo.getDataMask());
+ int dimension = bitMatrix.getHeight();
+ dataMask.unmaskBitMatrix(bitMatrix, dimension);
+
+ BitMatrix functionPattern = version.buildFunctionPattern();
+
+ boolean readingUp = true;
+ byte[] result = new byte[version.getTotalCodewords()];
+ int resultOffset = 0;
+ int currentByte = 0;
+ int bitsRead = 0;
+ // Read columns in pairs, from right to left
+ for (int j = dimension - 1; j > 0; j -= 2) {
+ if (j == 6) {
+ // Skip whole column with vertical alignment pattern;
+ // saves time and makes the other code proceed more cleanly
+ j--;
+ }
+ // Read alternatingly from bottom to top then top to bottom
+ for (int count = 0; count < dimension; count++) {
+ int i = readingUp ? dimension - 1 - count : count;
+ for (int col = 0; col < 2; col++) {
+ // Ignore bits covered by the function pattern
+ if (!functionPattern.get(j - col, i)) {
+ // Read a bit
+ bitsRead++;
+ currentByte <<= 1;
+ if (bitMatrix.get(j - col, i)) {
+ currentByte |= 1;
+ }
+ // If we've made a whole byte, save it off
+ if (bitsRead == 8) {
+ result[resultOffset++] = (byte) currentByte;
+ bitsRead = 0;
+ currentByte = 0;
+ }
+ }
+ }
+ }
+ readingUp ^= true; // readingUp = !readingUp; // switch directions
+ }
+ if (resultOffset != version.getTotalCodewords()) {
+ throw FormatException.getFormatInstance();
+ }
+ return result;
+ }
+
+}
\ No newline at end of file diff --git a/libraries/zxing/src/com/google/zxing/qrcode/decoder/DataBlock.java b/libraries/zxing/src/com/google/zxing/qrcode/decoder/DataBlock.java new file mode 100644 index 000000000..12959d9c1 --- /dev/null +++ b/libraries/zxing/src/com/google/zxing/qrcode/decoder/DataBlock.java @@ -0,0 +1,123 @@ +/*
+ * Copyright 2007 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.decoder;
+
+/**
+ * <p>Encapsulates a block of data within a QR Code. QR Codes may split their data into
+ * multiple blocks, each of which is a unit of data and error-correction codewords. Each
+ * is represented by an instance of this class.</p>
+ *
+ * @author Sean Owen
+ */
+final class DataBlock {
+
+ private final int numDataCodewords;
+ private final byte[] codewords;
+
+ private DataBlock(int numDataCodewords, byte[] codewords) {
+ this.numDataCodewords = numDataCodewords;
+ this.codewords = codewords;
+ }
+
+ /**
+ * <p>When QR Codes use multiple data blocks, they are actually interleaved.
+ * That is, the first byte of data block 1 to n is written, then the second bytes, and so on. This
+ * method will separate the data into original blocks.</p>
+ *
+ * @param rawCodewords bytes as read directly from the QR Code
+ * @param version version of the QR Code
+ * @param ecLevel error-correction level of the QR Code
+ * @return DataBlocks containing original bytes, "de-interleaved" from representation in the
+ * QR Code
+ */
+ static DataBlock[] getDataBlocks(byte[] rawCodewords,
+ Version version,
+ ErrorCorrectionLevel ecLevel) {
+
+ if (rawCodewords.length != version.getTotalCodewords()) {
+ throw new IllegalArgumentException();
+ }
+
+ // Figure out the number and size of data blocks used by this version and
+ // error correction level
+ Version.ECBlocks ecBlocks = version.getECBlocksForLevel(ecLevel);
+
+ // First count the total number of data blocks
+ int totalBlocks = 0;
+ Version.ECB[] ecBlockArray = ecBlocks.getECBlocks();
+ for (int i = 0; i < ecBlockArray.length; i++) {
+ totalBlocks += ecBlockArray[i].getCount();
+ }
+
+ // Now establish DataBlocks of the appropriate size and number of data codewords
+ DataBlock[] result = new DataBlock[totalBlocks];
+ int numResultBlocks = 0;
+ for (int j = 0; j < ecBlockArray.length; j++) {
+ Version.ECB ecBlock = ecBlockArray[j];
+ for (int i = 0; i < ecBlock.getCount(); i++) {
+ int numDataCodewords = ecBlock.getDataCodewords();
+ int numBlockCodewords = ecBlocks.getECCodewordsPerBlock() + numDataCodewords;
+ result[numResultBlocks++] = new DataBlock(numDataCodewords, new byte[numBlockCodewords]);
+ }
+ }
+
+ // All blocks have the same amount of data, except that the last n
+ // (where n may be 0) have 1 more byte. Figure out where these start.
+ int shorterBlocksTotalCodewords = result[0].codewords.length;
+ int longerBlocksStartAt = result.length - 1;
+ while (longerBlocksStartAt >= 0) {
+ int numCodewords = result[longerBlocksStartAt].codewords.length;
+ if (numCodewords == shorterBlocksTotalCodewords) {
+ break;
+ }
+ longerBlocksStartAt--;
+ }
+ longerBlocksStartAt++;
+
+ int shorterBlocksNumDataCodewords = shorterBlocksTotalCodewords - ecBlocks.getECCodewordsPerBlock();
+ // The last elements of result may be 1 element longer;
+ // first fill out as many elements as all of them have
+ int rawCodewordsOffset = 0;
+ for (int i = 0; i < shorterBlocksNumDataCodewords; i++) {
+ for (int j = 0; j < numResultBlocks; j++) {
+ result[j].codewords[i] = rawCodewords[rawCodewordsOffset++];
+ }
+ }
+ // Fill out the last data block in the longer ones
+ for (int j = longerBlocksStartAt; j < numResultBlocks; j++) {
+ result[j].codewords[shorterBlocksNumDataCodewords] = rawCodewords[rawCodewordsOffset++];
+ }
+ // Now add in error correction blocks
+ int max = result[0].codewords.length;
+ for (int i = shorterBlocksNumDataCodewords; i < max; i++) {
+ for (int j = 0; j < numResultBlocks; j++) {
+ int iOffset = j < longerBlocksStartAt ? i : i + 1;
+ result[j].codewords[iOffset] = rawCodewords[rawCodewordsOffset++];
+ }
+ }
+ return result;
+ }
+
+ int getNumDataCodewords() {
+ return numDataCodewords;
+ }
+
+ byte[] getCodewords() {
+ return codewords;
+ }
+
+}
diff --git a/libraries/zxing/src/com/google/zxing/qrcode/decoder/DataMask.java b/libraries/zxing/src/com/google/zxing/qrcode/decoder/DataMask.java new file mode 100644 index 000000000..d29dbd47f --- /dev/null +++ b/libraries/zxing/src/com/google/zxing/qrcode/decoder/DataMask.java @@ -0,0 +1,155 @@ +/*
+ * Copyright 2007 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.decoder;
+
+import com.google.zxing.common.BitMatrix;
+
+/**
+ * <p>Encapsulates data masks for the data bits in a QR code, per ISO 18004:2006 6.8. Implementations
+ * of this class can un-mask a raw BitMatrix. For simplicity, they will unmask the entire BitMatrix,
+ * including areas used for finder patterns, timing patterns, etc. These areas should be unused
+ * after the point they are unmasked anyway.</p>
+ *
+ * <p>Note that the diagram in section 6.8.1 is misleading since it indicates that i is column position
+ * and j is row position. In fact, as the text says, i is row position and j is column position.</p>
+ *
+ * @author Sean Owen
+ */
+abstract class DataMask {
+
+ /**
+ * See ISO 18004:2006 6.8.1
+ */
+ private static final DataMask[] DATA_MASKS = {
+ new DataMask000(),
+ new DataMask001(),
+ new DataMask010(),
+ new DataMask011(),
+ new DataMask100(),
+ new DataMask101(),
+ new DataMask110(),
+ new DataMask111(),
+ };
+
+ private DataMask() {
+ }
+
+ /**
+ * <p>Implementations of this method reverse the data masking process applied to a QR Code and
+ * make its bits ready to read.</p>
+ *
+ * @param bits representation of QR Code bits
+ * @param dimension dimension of QR Code, represented by bits, being unmasked
+ */
+ final void unmaskBitMatrix(BitMatrix bits, int dimension) {
+ for (int i = 0; i < dimension; i++) {
+ for (int j = 0; j < dimension; j++) {
+ if (isMasked(i, j)) {
+ bits.flip(j, i);
+ }
+ }
+ }
+ }
+
+ abstract boolean isMasked(int i, int j);
+
+ /**
+ * @param reference a value between 0 and 7 indicating one of the eight possible
+ * data mask patterns a QR Code may use
+ * @return DataMask encapsulating the data mask pattern
+ */
+ static DataMask forReference(int reference) {
+ if (reference < 0 || reference > 7) {
+ throw new IllegalArgumentException();
+ }
+ return DATA_MASKS[reference];
+ }
+
+ /**
+ * 000: mask bits for which (x + y) mod 2 == 0
+ */
+ private static class DataMask000 extends DataMask {
+ boolean isMasked(int i, int j) {
+ return ((i + j) & 0x01) == 0;
+ }
+ }
+
+ /**
+ * 001: mask bits for which x mod 2 == 0
+ */
+ private static class DataMask001 extends DataMask {
+ boolean isMasked(int i, int j) {
+ return (i & 0x01) == 0;
+ }
+ }
+
+ /**
+ * 010: mask bits for which y mod 3 == 0
+ */
+ private static class DataMask010 extends DataMask {
+ boolean isMasked(int i, int j) {
+ return j % 3 == 0;
+ }
+ }
+
+ /**
+ * 011: mask bits for which (x + y) mod 3 == 0
+ */
+ private static class DataMask011 extends DataMask {
+ boolean isMasked(int i, int j) {
+ return (i + j) % 3 == 0;
+ }
+ }
+
+ /**
+ * 100: mask bits for which (x/2 + y/3) mod 2 == 0
+ */
+ private static class DataMask100 extends DataMask {
+ boolean isMasked(int i, int j) {
+ return (((i >>> 1) + (j /3)) & 0x01) == 0;
+ }
+ }
+
+ /**
+ * 101: mask bits for which xy mod 2 + xy mod 3 == 0
+ */
+ private static class DataMask101 extends DataMask {
+ boolean isMasked(int i, int j) {
+ int temp = i * j;
+ return (temp & 0x01) + (temp % 3) == 0;
+ }
+ }
+
+ /**
+ * 110: mask bits for which (xy mod 2 + xy mod 3) mod 2 == 0
+ */
+ private static class DataMask110 extends DataMask {
+ boolean isMasked(int i, int j) {
+ int temp = i * j;
+ return (((temp & 0x01) + (temp % 3)) & 0x01) == 0;
+ }
+ }
+
+ /**
+ * 111: mask bits for which ((x+y)mod 2 + xy mod 3) mod 2 == 0
+ */
+ private static class DataMask111 extends DataMask {
+ boolean isMasked(int i, int j) {
+ return ((((i + j) & 0x01) + ((i * j) % 3)) & 0x01) == 0;
+ }
+ }
+}
diff --git a/libraries/zxing/src/com/google/zxing/qrcode/decoder/DecodedBitStreamParser.java b/libraries/zxing/src/com/google/zxing/qrcode/decoder/DecodedBitStreamParser.java new file mode 100644 index 000000000..ff374ac50 --- /dev/null +++ b/libraries/zxing/src/com/google/zxing/qrcode/decoder/DecodedBitStreamParser.java @@ -0,0 +1,322 @@ +/* + * Copyright 2007 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.decoder; + +import com.google.zxing.FormatException; +import com.google.zxing.common.BitSource; +import com.google.zxing.common.CharacterSetECI; +import com.google.zxing.common.DecoderResult; +import com.google.zxing.common.StringUtils; + +import java.io.UnsupportedEncodingException; +import java.util.Hashtable; +import java.util.Vector; + +/** + * <p>QR Codes can encode text as bits in one of several modes, and can use multiple modes + * in one QR Code. This class decodes the bits back into text.</p> + * + * <p>See ISO 18004:2006, 6.4.3 - 6.4.7</p> + * + * @author Sean Owen + */ +final class DecodedBitStreamParser { + + /** + * See ISO 18004:2006, 6.4.4 Table 5 + */ + private static final char[] ALPHANUMERIC_CHARS = { + '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', + 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', + 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', + ' ', '$', '%', '*', '+', '-', '.', '/', ':' + }; + private static final int GB2312_SUBSET = 1; + + private DecodedBitStreamParser() { + } + + static DecoderResult decode(byte[] bytes, Version version, ErrorCorrectionLevel ecLevel, Hashtable hints) + throws FormatException { + BitSource bits = new BitSource(bytes); + StringBuffer result = new StringBuffer(50); + CharacterSetECI currentCharacterSetECI = null; + boolean fc1InEffect = false; + Vector byteSegments = new Vector(1); + Mode mode; + do { + // While still another segment to read... + if (bits.available() < 4) { + // OK, assume we're done. Really, a TERMINATOR mode should have been recorded here + mode = Mode.TERMINATOR; + } else { + try { + mode = Mode.forBits(bits.readBits(4)); // mode is encoded by 4 bits + } catch (IllegalArgumentException iae) { + throw FormatException.getFormatInstance(); + } + } + if (!mode.equals(Mode.TERMINATOR)) { + if (mode.equals(Mode.FNC1_FIRST_POSITION) || mode.equals(Mode.FNC1_SECOND_POSITION)) { + // We do little with FNC1 except alter the parsed result a bit according to the spec + fc1InEffect = true; + } else if (mode.equals(Mode.STRUCTURED_APPEND)) { + // not really supported; all we do is ignore it + // Read next 8 bits (symbol sequence #) and 8 bits (parity data), then continue + bits.readBits(16); + } else if (mode.equals(Mode.ECI)) { + // Count doesn't apply to ECI + int value = parseECIValue(bits); + currentCharacterSetECI = CharacterSetECI.getCharacterSetECIByValue(value); + if (currentCharacterSetECI == null) { + throw FormatException.getFormatInstance(); + } + } else { + // First handle Hanzi mode which does not start with character count + if (mode.equals(Mode.HANZI)) { + //chinese mode contains a sub set indicator right after mode indicator + int subset = bits.readBits(4); + int countHanzi = bits.readBits(mode.getCharacterCountBits(version)); + if (subset == GB2312_SUBSET) { + decodeHanziSegment(bits, result, countHanzi); + } + } else { + // "Normal" QR code modes: + // How many characters will follow, encoded in this mode? + int count = bits.readBits(mode.getCharacterCountBits(version)); + if (mode.equals(Mode.NUMERIC)) { + decodeNumericSegment(bits, result, count); + } else if (mode.equals(Mode.ALPHANUMERIC)) { + decodeAlphanumericSegment(bits, result, count, fc1InEffect); + } else if (mode.equals(Mode.BYTE)) { + decodeByteSegment(bits, result, count, currentCharacterSetECI, byteSegments, hints); + } else if (mode.equals(Mode.KANJI)) { + decodeKanjiSegment(bits, result, count); + } else { + throw FormatException.getFormatInstance(); + } + } + } + } + } while (!mode.equals(Mode.TERMINATOR)); + + return new DecoderResult(bytes, + result.toString(), + byteSegments.isEmpty() ? null : byteSegments, + ecLevel == null ? null : ecLevel.toString()); + } + + /** + * See specification GBT 18284-2000 + */ + private static void decodeHanziSegment(BitSource bits, + StringBuffer result, + int count) throws FormatException { + // Don't crash trying to read more bits than we have available. + if (count * 13 > bits.available()) { + throw FormatException.getFormatInstance(); + } + + // Each character will require 2 bytes. Read the characters as 2-byte pairs + // and decode as GB2312 afterwards + byte[] buffer = new byte[2 * count]; + int offset = 0; + while (count > 0) { + // Each 13 bits encodes a 2-byte character + int twoBytes = bits.readBits(13); + int assembledTwoBytes = ((twoBytes / 0x060) << 8) | (twoBytes % 0x060); + if (assembledTwoBytes < 0x003BF) { + // In the 0xA1A1 to 0xAAFE range + assembledTwoBytes += 0x0A1A1; + } else { + // In the 0xB0A1 to 0xFAFE range + assembledTwoBytes += 0x0A6A1; + } + buffer[offset] = (byte) ((assembledTwoBytes >> 8) & 0xFF); + buffer[offset + 1] = (byte) (assembledTwoBytes & 0xFF); + offset += 2; + count--; + } + + try { + result.append(new String(buffer, StringUtils.GB2312)); + } catch (UnsupportedEncodingException uee) { + throw FormatException.getFormatInstance(); + } + } + + private static void decodeKanjiSegment(BitSource bits, + StringBuffer result, + int count) throws FormatException { + // Don't crash trying to read more bits than we have available. + if (count * 13 > bits.available()) { + throw FormatException.getFormatInstance(); + } + + // Each character will require 2 bytes. Read the characters as 2-byte pairs + // and decode as Shift_JIS afterwards + byte[] buffer = new byte[2 * count]; + int offset = 0; + while (count > 0) { + // Each 13 bits encodes a 2-byte character + int twoBytes = bits.readBits(13); + int assembledTwoBytes = ((twoBytes / 0x0C0) << 8) | (twoBytes % 0x0C0); + if (assembledTwoBytes < 0x01F00) { + // In the 0x8140 to 0x9FFC range + assembledTwoBytes += 0x08140; + } else { + // In the 0xE040 to 0xEBBF range + assembledTwoBytes += 0x0C140; + } + buffer[offset] = (byte) (assembledTwoBytes >> 8); + buffer[offset + 1] = (byte) assembledTwoBytes; + offset += 2; + count--; + } + // Shift_JIS may not be supported in some environments: + try { + result.append(new String(buffer, StringUtils.SHIFT_JIS)); + } catch (UnsupportedEncodingException uee) { + throw FormatException.getFormatInstance(); + } + } + + private static void decodeByteSegment(BitSource bits, + StringBuffer result, + int count, + CharacterSetECI currentCharacterSetECI, + Vector byteSegments, + Hashtable hints) throws FormatException { + // Don't crash trying to read more bits than we have available. + if (count << 3 > bits.available()) { + throw FormatException.getFormatInstance(); + } + + byte[] readBytes = new byte[count]; + for (int i = 0; i < count; i++) { + readBytes[i] = (byte) bits.readBits(8); + } + String encoding; + if (currentCharacterSetECI == null) { + // The spec isn't clear on this mode; see + // section 6.4.5: t does not say which encoding to assuming + // upon decoding. I have seen ISO-8859-1 used as well as + // Shift_JIS -- without anything like an ECI designator to + // give a hint. + encoding = StringUtils.guessEncoding(readBytes, hints); + } else { + encoding = currentCharacterSetECI.getEncodingName(); + } + try { + result.append(new String(readBytes, encoding)); + } catch (UnsupportedEncodingException uce) { + throw FormatException.getFormatInstance(); + } + byteSegments.addElement(readBytes); + } + + private static char toAlphaNumericChar(int value) throws FormatException { + if (value >= ALPHANUMERIC_CHARS.length) { + throw FormatException.getFormatInstance(); + } + return ALPHANUMERIC_CHARS[value]; + } + + private static void decodeAlphanumericSegment(BitSource bits, + StringBuffer result, + int count, + boolean fc1InEffect) throws FormatException { + // Read two characters at a time + int start = result.length(); + while (count > 1) { + int nextTwoCharsBits = bits.readBits(11); + result.append(toAlphaNumericChar(nextTwoCharsBits / 45)); + result.append(toAlphaNumericChar(nextTwoCharsBits % 45)); + count -= 2; + } + if (count == 1) { + // special case: one character left + result.append(toAlphaNumericChar(bits.readBits(6))); + } + // See section 6.4.8.1, 6.4.8.2 + if (fc1InEffect) { + // We need to massage the result a bit if in an FNC1 mode: + for (int i = start; i < result.length(); i++) { + if (result.charAt(i) == '%') { + if (i < result.length() - 1 && result.charAt(i + 1) == '%') { + // %% is rendered as % + result.deleteCharAt(i + 1); + } else { + // In alpha mode, % should be converted to FNC1 separator 0x1D + result.setCharAt(i, (char) 0x1D); + } + } + } + } + } + + private static void decodeNumericSegment(BitSource bits, + StringBuffer result, + int count) throws FormatException { + // Read three digits at a time + while (count >= 3) { + // Each 10 bits encodes three digits + int threeDigitsBits = bits.readBits(10); + if (threeDigitsBits >= 1000) { + throw FormatException.getFormatInstance(); + } + result.append(toAlphaNumericChar(threeDigitsBits / 100)); + result.append(toAlphaNumericChar((threeDigitsBits / 10) % 10)); + result.append(toAlphaNumericChar(threeDigitsBits % 10)); + count -= 3; + } + if (count == 2) { + // Two digits left over to read, encoded in 7 bits + int twoDigitsBits = bits.readBits(7); + if (twoDigitsBits >= 100) { + throw FormatException.getFormatInstance(); + } + result.append(toAlphaNumericChar(twoDigitsBits / 10)); + result.append(toAlphaNumericChar(twoDigitsBits % 10)); + } else if (count == 1) { + // One digit left over to read + int digitBits = bits.readBits(4); + if (digitBits >= 10) { + throw FormatException.getFormatInstance(); + } + result.append(toAlphaNumericChar(digitBits)); + } + } + + private static int parseECIValue(BitSource bits) { + int firstByte = bits.readBits(8); + if ((firstByte & 0x80) == 0) { + // just one byte + return firstByte & 0x7F; + } else if ((firstByte & 0xC0) == 0x80) { + // two bytes + int secondByte = bits.readBits(8); + return ((firstByte & 0x3F) << 8) | secondByte; + } else if ((firstByte & 0xE0) == 0xC0) { + // three bytes + int secondThirdBytes = bits.readBits(16); + return ((firstByte & 0x1F) << 16) | secondThirdBytes; + } + throw new IllegalArgumentException("Bad ECI bits starting with byte " + firstByte); + } + +} diff --git a/libraries/zxing/src/com/google/zxing/qrcode/decoder/ErrorCorrectionLevel.java b/libraries/zxing/src/com/google/zxing/qrcode/decoder/ErrorCorrectionLevel.java new file mode 100644 index 000000000..e8d6c2589 --- /dev/null +++ b/libraries/zxing/src/com/google/zxing/qrcode/decoder/ErrorCorrectionLevel.java @@ -0,0 +1,86 @@ +/* + * Copyright 2007 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.decoder; + +/** + * <p>See ISO 18004:2006, 6.5.1. This enum encapsulates the four error correction levels + * defined by the QR code standard.</p> + * + * @author Sean Owen + */ +public final class ErrorCorrectionLevel { + + // No, we can't use an enum here. J2ME doesn't support it. + + /** + * L = ~7% correction + */ + public static final ErrorCorrectionLevel L = new ErrorCorrectionLevel(0, 0x01, "L"); + /** + * M = ~15% correction + */ + public static final ErrorCorrectionLevel M = new ErrorCorrectionLevel(1, 0x00, "M"); + /** + * Q = ~25% correction + */ + public static final ErrorCorrectionLevel Q = new ErrorCorrectionLevel(2, 0x03, "Q"); + /** + * H = ~30% correction + */ + public static final ErrorCorrectionLevel H = new ErrorCorrectionLevel(3, 0x02, "H"); + + private static final ErrorCorrectionLevel[] FOR_BITS = {M, L, H, Q}; + + private final int ordinal; + private final int bits; + private final String name; + + private ErrorCorrectionLevel(int ordinal, int bits, String name) { + this.ordinal = ordinal; + this.bits = bits; + this.name = name; + } + + public int ordinal() { + return ordinal; + } + + public int getBits() { + return bits; + } + + public String getName() { + return name; + } + + public String toString() { + return name; + } + + /** + * @param bits int containing the two bits encoding a QR Code's error correction level + * @return ErrorCorrectionLevel representing the encoded error correction level + */ + public static ErrorCorrectionLevel forBits(int bits) { + if (bits < 0 || bits >= FOR_BITS.length) { + throw new IllegalArgumentException(); + } + return FOR_BITS[bits]; + } + + +} diff --git a/libraries/zxing/src/com/google/zxing/qrcode/decoder/FormatInformation.java b/libraries/zxing/src/com/google/zxing/qrcode/decoder/FormatInformation.java new file mode 100644 index 000000000..1b76b0de5 --- /dev/null +++ b/libraries/zxing/src/com/google/zxing/qrcode/decoder/FormatInformation.java @@ -0,0 +1,171 @@ +/* + * Copyright 2007 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.decoder; + +/** + * <p>Encapsulates a QR Code's format information, including the data mask used and + * error correction level.</p> + * + * @author Sean Owen + * @see DataMask + * @see ErrorCorrectionLevel + */ +final class FormatInformation { + + private static final int FORMAT_INFO_MASK_QR = 0x5412; + + /** + * See ISO 18004:2006, Annex C, Table C.1 + */ + private static final int[][] FORMAT_INFO_DECODE_LOOKUP = { + {0x5412, 0x00}, + {0x5125, 0x01}, + {0x5E7C, 0x02}, + {0x5B4B, 0x03}, + {0x45F9, 0x04}, + {0x40CE, 0x05}, + {0x4F97, 0x06}, + {0x4AA0, 0x07}, + {0x77C4, 0x08}, + {0x72F3, 0x09}, + {0x7DAA, 0x0A}, + {0x789D, 0x0B}, + {0x662F, 0x0C}, + {0x6318, 0x0D}, + {0x6C41, 0x0E}, + {0x6976, 0x0F}, + {0x1689, 0x10}, + {0x13BE, 0x11}, + {0x1CE7, 0x12}, + {0x19D0, 0x13}, + {0x0762, 0x14}, + {0x0255, 0x15}, + {0x0D0C, 0x16}, + {0x083B, 0x17}, + {0x355F, 0x18}, + {0x3068, 0x19}, + {0x3F31, 0x1A}, + {0x3A06, 0x1B}, + {0x24B4, 0x1C}, + {0x2183, 0x1D}, + {0x2EDA, 0x1E}, + {0x2BED, 0x1F}, + }; + + /** + * Offset i holds the number of 1 bits in the binary representation of i + */ + private static final int[] BITS_SET_IN_HALF_BYTE = + {0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4}; + + private final ErrorCorrectionLevel errorCorrectionLevel; + private final byte dataMask; + + private FormatInformation(int formatInfo) { + // Bits 3,4 + errorCorrectionLevel = ErrorCorrectionLevel.forBits((formatInfo >> 3) & 0x03); + // Bottom 3 bits + dataMask = (byte) (formatInfo & 0x07); + } + + static int numBitsDiffering(int a, int b) { + a ^= b; // a now has a 1 bit exactly where its bit differs with b's + // Count bits set quickly with a series of lookups: + return BITS_SET_IN_HALF_BYTE[a & 0x0F] + + BITS_SET_IN_HALF_BYTE[(a >>> 4 & 0x0F)] + + BITS_SET_IN_HALF_BYTE[(a >>> 8 & 0x0F)] + + BITS_SET_IN_HALF_BYTE[(a >>> 12 & 0x0F)] + + BITS_SET_IN_HALF_BYTE[(a >>> 16 & 0x0F)] + + BITS_SET_IN_HALF_BYTE[(a >>> 20 & 0x0F)] + + BITS_SET_IN_HALF_BYTE[(a >>> 24 & 0x0F)] + + BITS_SET_IN_HALF_BYTE[(a >>> 28 & 0x0F)]; + } + + /** + * @param maskedFormatInfo1 format info indicator, with mask still applied + * @param maskedFormatInfo2 second copy of same info; both are checked at the same time + * to establish best match + * @return information about the format it specifies, or <code>null</code> + * if doesn't seem to match any known pattern + */ + static FormatInformation decodeFormatInformation(int maskedFormatInfo1, int maskedFormatInfo2) { + FormatInformation formatInfo = doDecodeFormatInformation(maskedFormatInfo1, maskedFormatInfo2); + if (formatInfo != null) { + return formatInfo; + } + // Should return null, but, some QR codes apparently + // do not mask this info. Try again by actually masking the pattern + // first + return doDecodeFormatInformation(maskedFormatInfo1 ^ FORMAT_INFO_MASK_QR, + maskedFormatInfo2 ^ FORMAT_INFO_MASK_QR); + } + + private static FormatInformation doDecodeFormatInformation(int maskedFormatInfo1, int maskedFormatInfo2) { + // Find the int in FORMAT_INFO_DECODE_LOOKUP with fewest bits differing + int bestDifference = Integer.MAX_VALUE; + int bestFormatInfo = 0; + for (int i = 0; i < FORMAT_INFO_DECODE_LOOKUP.length; i++) { + int[] decodeInfo = FORMAT_INFO_DECODE_LOOKUP[i]; + int targetInfo = decodeInfo[0]; + if (targetInfo == maskedFormatInfo1 || targetInfo == maskedFormatInfo2) { + // Found an exact match + return new FormatInformation(decodeInfo[1]); + } + int bitsDifference = numBitsDiffering(maskedFormatInfo1, targetInfo); + if (bitsDifference < bestDifference) { + bestFormatInfo = decodeInfo[1]; + bestDifference = bitsDifference; + } + if (maskedFormatInfo1 != maskedFormatInfo2) { + // also try the other option + bitsDifference = numBitsDiffering(maskedFormatInfo2, targetInfo); + if (bitsDifference < bestDifference) { + bestFormatInfo = decodeInfo[1]; + bestDifference = bitsDifference; + } + } + } + // Hamming distance of the 32 masked codes is 7, by construction, so <= 3 bits + // differing means we found a match + if (bestDifference <= 3) { + return new FormatInformation(bestFormatInfo); + } + return null; + } + + ErrorCorrectionLevel getErrorCorrectionLevel() { + return errorCorrectionLevel; + } + + byte getDataMask() { + return dataMask; + } + + public int hashCode() { + return (errorCorrectionLevel.ordinal() << 3) | (int) dataMask; + } + + public boolean equals(Object o) { + if (!(o instanceof FormatInformation)) { + return false; + } + FormatInformation other = (FormatInformation) o; + return this.errorCorrectionLevel == other.errorCorrectionLevel && + this.dataMask == other.dataMask; + } + +} diff --git a/libraries/zxing/src/com/google/zxing/qrcode/decoder/Mode.java b/libraries/zxing/src/com/google/zxing/qrcode/decoder/Mode.java new file mode 100644 index 000000000..3c66217d3 --- /dev/null +++ b/libraries/zxing/src/com/google/zxing/qrcode/decoder/Mode.java @@ -0,0 +1,117 @@ +/* + * Copyright 2007 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.decoder; + +/** + * <p>See ISO 18004:2006, 6.4.1, Tables 2 and 3. This enum encapsulates the various modes in which + * data can be encoded to bits in the QR code standard.</p> + * + * @author Sean Owen + */ +public final class Mode { + + // No, we can't use an enum here. J2ME doesn't support it. + + public static final Mode TERMINATOR = new Mode(new int[]{0, 0, 0}, 0x00, "TERMINATOR"); // Not really a mode... + public static final Mode NUMERIC = new Mode(new int[]{10, 12, 14}, 0x01, "NUMERIC"); + public static final Mode ALPHANUMERIC = new Mode(new int[]{9, 11, 13}, 0x02, "ALPHANUMERIC"); + public static final Mode STRUCTURED_APPEND = new Mode(new int[]{0, 0, 0}, 0x03, "STRUCTURED_APPEND"); // Not supported + public static final Mode BYTE = new Mode(new int[]{8, 16, 16}, 0x04, "BYTE"); + public static final Mode ECI = new Mode(null, 0x07, "ECI"); // character counts don't apply + public static final Mode KANJI = new Mode(new int[]{8, 10, 12}, 0x08, "KANJI"); + public static final Mode FNC1_FIRST_POSITION = new Mode(null, 0x05, "FNC1_FIRST_POSITION"); + public static final Mode FNC1_SECOND_POSITION = new Mode(null, 0x09, "FNC1_SECOND_POSITION"); + /** See GBT 18284-2000; "Hanzi" is a transliteration of this mode name. */ + public static final Mode HANZI = new Mode(new int[]{8, 10, 12}, 0x0D, "HANZI"); + + private final int[] characterCountBitsForVersions; + private final int bits; + private final String name; + + private Mode(int[] characterCountBitsForVersions, int bits, String name) { + this.characterCountBitsForVersions = characterCountBitsForVersions; + this.bits = bits; + this.name = name; + } + + /** + * @param bits four bits encoding a QR Code data mode + * @return Mode encoded by these bits + * @throws IllegalArgumentException if bits do not correspond to a known mode + */ + public static Mode forBits(int bits) { + switch (bits) { + case 0x0: + return TERMINATOR; + case 0x1: + return NUMERIC; + case 0x2: + return ALPHANUMERIC; + case 0x3: + return STRUCTURED_APPEND; + case 0x4: + return BYTE; + case 0x5: + return FNC1_FIRST_POSITION; + case 0x7: + return ECI; + case 0x8: + return KANJI; + case 0x9: + return FNC1_SECOND_POSITION; + case 0xD: + // 0xD is defined in GBT 18284-2000, may not be supported in foreign country + return HANZI; + default: + throw new IllegalArgumentException(); + } + } + + /** + * @param version version in question + * @return number of bits used, in this QR Code symbol {@link Version}, to encode the + * count of characters that will follow encoded in this Mode + */ + public int getCharacterCountBits(Version version) { + if (characterCountBitsForVersions == null) { + throw new IllegalArgumentException("Character count doesn't apply to this mode"); + } + int number = version.getVersionNumber(); + int offset; + if (number <= 9) { + offset = 0; + } else if (number <= 26) { + offset = 1; + } else { + offset = 2; + } + return characterCountBitsForVersions[offset]; + } + + public int getBits() { + return bits; + } + + public String getName() { + return name; + } + + public String toString() { + return name; + } + +} diff --git a/libraries/zxing/src/com/google/zxing/qrcode/decoder/Version.java b/libraries/zxing/src/com/google/zxing/qrcode/decoder/Version.java new file mode 100644 index 000000000..ba795de42 --- /dev/null +++ b/libraries/zxing/src/com/google/zxing/qrcode/decoder/Version.java @@ -0,0 +1,586 @@ +/*
+ * Copyright 2007 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.decoder;
+
+import com.google.zxing.FormatException;
+import com.google.zxing.common.BitMatrix;
+
+/**
+ * See ISO 18004:2006 Annex D
+ *
+ * @author Sean Owen
+ */
+public final class Version {
+
+ /**
+ * See ISO 18004:2006 Annex D.
+ * Element i represents the raw version bits that specify version i + 7
+ */
+ private static final int[] VERSION_DECODE_INFO = {
+ 0x07C94, 0x085BC, 0x09A99, 0x0A4D3, 0x0BBF6,
+ 0x0C762, 0x0D847, 0x0E60D, 0x0F928, 0x10B78,
+ 0x1145D, 0x12A17, 0x13532, 0x149A6, 0x15683,
+ 0x168C9, 0x177EC, 0x18EC4, 0x191E1, 0x1AFAB,
+ 0x1B08E, 0x1CC1A, 0x1D33F, 0x1ED75, 0x1F250,
+ 0x209D5, 0x216F0, 0x228BA, 0x2379F, 0x24B0B,
+ 0x2542E, 0x26A64, 0x27541, 0x28C69
+ };
+
+ private static final Version[] VERSIONS = buildVersions();
+
+ private final int versionNumber;
+ private final int[] alignmentPatternCenters;
+ private final ECBlocks[] ecBlocks;
+ private final int totalCodewords;
+
+ private Version(int versionNumber,
+ int[] alignmentPatternCenters,
+ ECBlocks ecBlocks1,
+ ECBlocks ecBlocks2,
+ ECBlocks ecBlocks3,
+ ECBlocks ecBlocks4) {
+ this.versionNumber = versionNumber;
+ this.alignmentPatternCenters = alignmentPatternCenters;
+ this.ecBlocks = new ECBlocks[]{ecBlocks1, ecBlocks2, ecBlocks3, ecBlocks4};
+ int total = 0;
+ int ecCodewords = ecBlocks1.getECCodewordsPerBlock();
+ ECB[] ecbArray = ecBlocks1.getECBlocks();
+ for (int i = 0; i < ecbArray.length; i++) {
+ ECB ecBlock = ecbArray[i];
+ total += ecBlock.getCount() * (ecBlock.getDataCodewords() + ecCodewords);
+ }
+ this.totalCodewords = total;
+ }
+
+ public int getVersionNumber() {
+ return versionNumber;
+ }
+
+ public int[] getAlignmentPatternCenters() {
+ return alignmentPatternCenters;
+ }
+
+ public int getTotalCodewords() {
+ return totalCodewords;
+ }
+
+ public int getDimensionForVersion() {
+ return 17 + 4 * versionNumber;
+ }
+
+ public ECBlocks getECBlocksForLevel(ErrorCorrectionLevel ecLevel) {
+ return ecBlocks[ecLevel.ordinal()];
+ }
+
+ /**
+ * <p>Deduces version information purely from QR Code dimensions.</p>
+ *
+ * @param dimension dimension in modules
+ * @return Version for a QR Code of that dimension
+ * @throws FormatException if dimension is not 1 mod 4
+ */
+ public static Version getProvisionalVersionForDimension(int dimension) throws FormatException {
+ if (dimension % 4 != 1) {
+ throw FormatException.getFormatInstance();
+ }
+ try {
+ return getVersionForNumber((dimension - 17) >> 2);
+ } catch (IllegalArgumentException iae) {
+ throw FormatException.getFormatInstance();
+ }
+ }
+
+ public static Version getVersionForNumber(int versionNumber) {
+ if (versionNumber < 1 || versionNumber > 40) {
+ throw new IllegalArgumentException();
+ }
+ return VERSIONS[versionNumber - 1];
+ }
+
+ static Version decodeVersionInformation(int versionBits) {
+ int bestDifference = Integer.MAX_VALUE;
+ int bestVersion = 0;
+ for (int i = 0; i < VERSION_DECODE_INFO.length; i++) {
+ int targetVersion = VERSION_DECODE_INFO[i];
+ // Do the version info bits match exactly? done.
+ if (targetVersion == versionBits) {
+ return getVersionForNumber(i + 7);
+ }
+ // Otherwise see if this is the closest to a real version info bit string
+ // we have seen so far
+ int bitsDifference = FormatInformation.numBitsDiffering(versionBits, targetVersion);
+ if (bitsDifference < bestDifference) {
+ bestVersion = i + 7;
+ bestDifference = bitsDifference;
+ }
+ }
+ // We can tolerate up to 3 bits of error since no two version info codewords will
+ // differ in less than 8 bits.
+ if (bestDifference <= 3) {
+ return getVersionForNumber(bestVersion);
+ }
+ // If we didn't find a close enough match, fail
+ return null;
+ }
+
+ /**
+ * See ISO 18004:2006 Annex E
+ */
+ BitMatrix buildFunctionPattern() {
+ int dimension = getDimensionForVersion();
+ BitMatrix bitMatrix = new BitMatrix(dimension);
+
+ // Top left finder pattern + separator + format
+ bitMatrix.setRegion(0, 0, 9, 9);
+ // Top right finder pattern + separator + format
+ bitMatrix.setRegion(dimension - 8, 0, 8, 9);
+ // Bottom left finder pattern + separator + format
+ bitMatrix.setRegion(0, dimension - 8, 9, 8);
+
+ // Alignment patterns
+ int max = alignmentPatternCenters.length;
+ for (int x = 0; x < max; x++) {
+ int i = alignmentPatternCenters[x] - 2;
+ for (int y = 0; y < max; y++) {
+ if ((x == 0 && (y == 0 || y == max - 1)) || (x == max - 1 && y == 0)) {
+ // No alignment patterns near the three finder paterns
+ continue;
+ }
+ bitMatrix.setRegion(alignmentPatternCenters[y] - 2, i, 5, 5);
+ }
+ }
+
+ // Vertical timing pattern
+ bitMatrix.setRegion(6, 9, 1, dimension - 17);
+ // Horizontal timing pattern
+ bitMatrix.setRegion(9, 6, dimension - 17, 1);
+
+ if (versionNumber > 6) {
+ // Version info, top right
+ bitMatrix.setRegion(dimension - 11, 0, 3, 6);
+ // Version info, bottom left
+ bitMatrix.setRegion(0, dimension - 11, 6, 3);
+ }
+
+ return bitMatrix;
+ }
+
+ /**
+ * <p>Encapsulates a set of error-correction blocks in one symbol version. Most versions will
+ * use blocks of differing sizes within one version, so, this encapsulates the parameters for
+ * each set of blocks. It also holds the number of error-correction codewords per block since it
+ * will be the same across all blocks within one version.</p>
+ */
+ public static final class ECBlocks {
+ private final int ecCodewordsPerBlock;
+ private final ECB[] ecBlocks;
+
+ ECBlocks(int ecCodewordsPerBlock, ECB ecBlocks) {
+ this.ecCodewordsPerBlock = ecCodewordsPerBlock;
+ this.ecBlocks = new ECB[]{ecBlocks};
+ }
+
+ ECBlocks(int ecCodewordsPerBlock, ECB ecBlocks1, ECB ecBlocks2) {
+ this.ecCodewordsPerBlock = ecCodewordsPerBlock;
+ this.ecBlocks = new ECB[]{ecBlocks1, ecBlocks2};
+ }
+
+ public int getECCodewordsPerBlock() {
+ return ecCodewordsPerBlock;
+ }
+
+ public int getNumBlocks() {
+ int total = 0;
+ for (int i = 0; i < ecBlocks.length; i++) {
+ total += ecBlocks[i].getCount();
+ }
+ return total;
+ }
+
+ public int getTotalECCodewords() {
+ return ecCodewordsPerBlock * getNumBlocks();
+ }
+
+ public ECB[] getECBlocks() {
+ return ecBlocks;
+ }
+ }
+
+ /**
+ * <p>Encapsualtes the parameters for one error-correction block in one symbol version.
+ * This includes the number of data codewords, and the number of times a block with these
+ * parameters is used consecutively in the QR code version's format.</p>
+ */
+ public static final class ECB {
+ private final int count;
+ private final int dataCodewords;
+
+ ECB(int count, int dataCodewords) {
+ this.count = count;
+ this.dataCodewords = dataCodewords;
+ }
+
+ public int getCount() {
+ return count;
+ }
+
+ public int getDataCodewords() {
+ return dataCodewords;
+ }
+ }
+
+ public String toString() {
+ return String.valueOf(versionNumber);
+ }
+
+ /**
+ * See ISO 18004:2006 6.5.1 Table 9
+ */
+ private static Version[] buildVersions() {
+ return new Version[]{
+ new Version(1, new int[]{},
+ new ECBlocks(7, new ECB(1, 19)),
+ new ECBlocks(10, new ECB(1, 16)),
+ new ECBlocks(13, new ECB(1, 13)),
+ new ECBlocks(17, new ECB(1, 9))),
+ new Version(2, new int[]{6, 18},
+ new ECBlocks(10, new ECB(1, 34)),
+ new ECBlocks(16, new ECB(1, 28)),
+ new ECBlocks(22, new ECB(1, 22)),
+ new ECBlocks(28, new ECB(1, 16))),
+ new Version(3, new int[]{6, 22},
+ new ECBlocks(15, new ECB(1, 55)),
+ new ECBlocks(26, new ECB(1, 44)),
+ new ECBlocks(18, new ECB(2, 17)),
+ new ECBlocks(22, new ECB(2, 13))),
+ new Version(4, new int[]{6, 26},
+ new ECBlocks(20, new ECB(1, 80)),
+ new ECBlocks(18, new ECB(2, 32)),
+ new ECBlocks(26, new ECB(2, 24)),
+ new ECBlocks(16, new ECB(4, 9))),
+ new Version(5, new int[]{6, 30},
+ new ECBlocks(26, new ECB(1, 108)),
+ new ECBlocks(24, new ECB(2, 43)),
+ new ECBlocks(18, new ECB(2, 15),
+ new ECB(2, 16)),
+ new ECBlocks(22, new ECB(2, 11),
+ new ECB(2, 12))),
+ new Version(6, new int[]{6, 34},
+ new ECBlocks(18, new ECB(2, 68)),
+ new ECBlocks(16, new ECB(4, 27)),
+ new ECBlocks(24, new ECB(4, 19)),
+ new ECBlocks(28, new ECB(4, 15))),
+ new Version(7, new int[]{6, 22, 38},
+ new ECBlocks(20, new ECB(2, 78)),
+ new ECBlocks(18, new ECB(4, 31)),
+ new ECBlocks(18, new ECB(2, 14),
+ new ECB(4, 15)),
+ new ECBlocks(26, new ECB(4, 13),
+ new ECB(1, 14))),
+ new Version(8, new int[]{6, 24, 42},
+ new ECBlocks(24, new ECB(2, 97)),
+ new ECBlocks(22, new ECB(2, 38),
+ new ECB(2, 39)),
+ new ECBlocks(22, new ECB(4, 18),
+ new ECB(2, 19)),
+ new ECBlocks(26, new ECB(4, 14),
+ new ECB(2, 15))),
+ new Version(9, new int[]{6, 26, 46},
+ new ECBlocks(30, new ECB(2, 116)),
+ new ECBlocks(22, new ECB(3, 36),
+ new ECB(2, 37)),
+ new ECBlocks(20, new ECB(4, 16),
+ new ECB(4, 17)),
+ new ECBlocks(24, new ECB(4, 12),
+ new ECB(4, 13))),
+ new Version(10, new int[]{6, 28, 50},
+ new ECBlocks(18, new ECB(2, 68),
+ new ECB(2, 69)),
+ new ECBlocks(26, new ECB(4, 43),
+ new ECB(1, 44)),
+ new ECBlocks(24, new ECB(6, 19),
+ new ECB(2, 20)),
+ new ECBlocks(28, new ECB(6, 15),
+ new ECB(2, 16))),
+ new Version(11, new int[]{6, 30, 54},
+ new ECBlocks(20, new ECB(4, 81)),
+ new ECBlocks(30, new ECB(1, 50),
+ new ECB(4, 51)),
+ new ECBlocks(28, new ECB(4, 22),
+ new ECB(4, 23)),
+ new ECBlocks(24, new ECB(3, 12),
+ new ECB(8, 13))),
+ new Version(12, new int[]{6, 32, 58},
+ new ECBlocks(24, new ECB(2, 92),
+ new ECB(2, 93)),
+ new ECBlocks(22, new ECB(6, 36),
+ new ECB(2, 37)),
+ new ECBlocks(26, new ECB(4, 20),
+ new ECB(6, 21)),
+ new ECBlocks(28, new ECB(7, 14),
+ new ECB(4, 15))),
+ new Version(13, new int[]{6, 34, 62},
+ new ECBlocks(26, new ECB(4, 107)),
+ new ECBlocks(22, new ECB(8, 37),
+ new ECB(1, 38)),
+ new ECBlocks(24, new ECB(8, 20),
+ new ECB(4, 21)),
+ new ECBlocks(22, new ECB(12, 11),
+ new ECB(4, 12))),
+ new Version(14, new int[]{6, 26, 46, 66},
+ new ECBlocks(30, new ECB(3, 115),
+ new ECB(1, 116)),
+ new ECBlocks(24, new ECB(4, 40),
+ new ECB(5, 41)),
+ new ECBlocks(20, new ECB(11, 16),
+ new ECB(5, 17)),
+ new ECBlocks(24, new ECB(11, 12),
+ new ECB(5, 13))),
+ new Version(15, new int[]{6, 26, 48, 70},
+ new ECBlocks(22, new ECB(5, 87),
+ new ECB(1, 88)),
+ new ECBlocks(24, new ECB(5, 41),
+ new ECB(5, 42)),
+ new ECBlocks(30, new ECB(5, 24),
+ new ECB(7, 25)),
+ new ECBlocks(24, new ECB(11, 12),
+ new ECB(7, 13))),
+ new Version(16, new int[]{6, 26, 50, 74},
+ new ECBlocks(24, new ECB(5, 98),
+ new ECB(1, 99)),
+ new ECBlocks(28, new ECB(7, 45),
+ new ECB(3, 46)),
+ new ECBlocks(24, new ECB(15, 19),
+ new ECB(2, 20)),
+ new ECBlocks(30, new ECB(3, 15),
+ new ECB(13, 16))),
+ new Version(17, new int[]{6, 30, 54, 78},
+ new ECBlocks(28, new ECB(1, 107),
+ new ECB(5, 108)),
+ new ECBlocks(28, new ECB(10, 46),
+ new ECB(1, 47)),
+ new ECBlocks(28, new ECB(1, 22),
+ new ECB(15, 23)),
+ new ECBlocks(28, new ECB(2, 14),
+ new ECB(17, 15))),
+ new Version(18, new int[]{6, 30, 56, 82},
+ new ECBlocks(30, new ECB(5, 120),
+ new ECB(1, 121)),
+ new ECBlocks(26, new ECB(9, 43),
+ new ECB(4, 44)),
+ new ECBlocks(28, new ECB(17, 22),
+ new ECB(1, 23)),
+ new ECBlocks(28, new ECB(2, 14),
+ new ECB(19, 15))),
+ new Version(19, new int[]{6, 30, 58, 86},
+ new ECBlocks(28, new ECB(3, 113),
+ new ECB(4, 114)),
+ new ECBlocks(26, new ECB(3, 44),
+ new ECB(11, 45)),
+ new ECBlocks(26, new ECB(17, 21),
+ new ECB(4, 22)),
+ new ECBlocks(26, new ECB(9, 13),
+ new ECB(16, 14))),
+ new Version(20, new int[]{6, 34, 62, 90},
+ new ECBlocks(28, new ECB(3, 107),
+ new ECB(5, 108)),
+ new ECBlocks(26, new ECB(3, 41),
+ new ECB(13, 42)),
+ new ECBlocks(30, new ECB(15, 24),
+ new ECB(5, 25)),
+ new ECBlocks(28, new ECB(15, 15),
+ new ECB(10, 16))),
+ new Version(21, new int[]{6, 28, 50, 72, 94},
+ new ECBlocks(28, new ECB(4, 116),
+ new ECB(4, 117)),
+ new ECBlocks(26, new ECB(17, 42)),
+ new ECBlocks(28, new ECB(17, 22),
+ new ECB(6, 23)),
+ new ECBlocks(30, new ECB(19, 16),
+ new ECB(6, 17))),
+ new Version(22, new int[]{6, 26, 50, 74, 98},
+ new ECBlocks(28, new ECB(2, 111),
+ new ECB(7, 112)),
+ new ECBlocks(28, new ECB(17, 46)),
+ new ECBlocks(30, new ECB(7, 24),
+ new ECB(16, 25)),
+ new ECBlocks(24, new ECB(34, 13))),
+ new Version(23, new int[]{6, 30, 54, 78, 102},
+ new ECBlocks(30, new ECB(4, 121),
+ new ECB(5, 122)),
+ new ECBlocks(28, new ECB(4, 47),
+ new ECB(14, 48)),
+ new ECBlocks(30, new ECB(11, 24),
+ new ECB(14, 25)),
+ new ECBlocks(30, new ECB(16, 15),
+ new ECB(14, 16))),
+ new Version(24, new int[]{6, 28, 54, 80, 106},
+ new ECBlocks(30, new ECB(6, 117),
+ new ECB(4, 118)),
+ new ECBlocks(28, new ECB(6, 45),
+ new ECB(14, 46)),
+ new ECBlocks(30, new ECB(11, 24),
+ new ECB(16, 25)),
+ new ECBlocks(30, new ECB(30, 16),
+ new ECB(2, 17))),
+ new Version(25, new int[]{6, 32, 58, 84, 110},
+ new ECBlocks(26, new ECB(8, 106),
+ new ECB(4, 107)),
+ new ECBlocks(28, new ECB(8, 47),
+ new ECB(13, 48)),
+ new ECBlocks(30, new ECB(7, 24),
+ new ECB(22, 25)),
+ new ECBlocks(30, new ECB(22, 15),
+ new ECB(13, 16))),
+ new Version(26, new int[]{6, 30, 58, 86, 114},
+ new ECBlocks(28, new ECB(10, 114),
+ new ECB(2, 115)),
+ new ECBlocks(28, new ECB(19, 46),
+ new ECB(4, 47)),
+ new ECBlocks(28, new ECB(28, 22),
+ new ECB(6, 23)),
+ new ECBlocks(30, new ECB(33, 16),
+ new ECB(4, 17))),
+ new Version(27, new int[]{6, 34, 62, 90, 118},
+ new ECBlocks(30, new ECB(8, 122),
+ new ECB(4, 123)),
+ new ECBlocks(28, new ECB(22, 45),
+ new ECB(3, 46)),
+ new ECBlocks(30, new ECB(8, 23),
+ new ECB(26, 24)),
+ new ECBlocks(30, new ECB(12, 15),
+ new ECB(28, 16))),
+ new Version(28, new int[]{6, 26, 50, 74, 98, 122},
+ new ECBlocks(30, new ECB(3, 117),
+ new ECB(10, 118)),
+ new ECBlocks(28, new ECB(3, 45),
+ new ECB(23, 46)),
+ new ECBlocks(30, new ECB(4, 24),
+ new ECB(31, 25)),
+ new ECBlocks(30, new ECB(11, 15),
+ new ECB(31, 16))),
+ new Version(29, new int[]{6, 30, 54, 78, 102, 126},
+ new ECBlocks(30, new ECB(7, 116),
+ new ECB(7, 117)),
+ new ECBlocks(28, new ECB(21, 45),
+ new ECB(7, 46)),
+ new ECBlocks(30, new ECB(1, 23),
+ new ECB(37, 24)),
+ new ECBlocks(30, new ECB(19, 15),
+ new ECB(26, 16))),
+ new Version(30, new int[]{6, 26, 52, 78, 104, 130},
+ new ECBlocks(30, new ECB(5, 115),
+ new ECB(10, 116)),
+ new ECBlocks(28, new ECB(19, 47),
+ new ECB(10, 48)),
+ new ECBlocks(30, new ECB(15, 24),
+ new ECB(25, 25)),
+ new ECBlocks(30, new ECB(23, 15),
+ new ECB(25, 16))),
+ new Version(31, new int[]{6, 30, 56, 82, 108, 134},
+ new ECBlocks(30, new ECB(13, 115),
+ new ECB(3, 116)),
+ new ECBlocks(28, new ECB(2, 46),
+ new ECB(29, 47)),
+ new ECBlocks(30, new ECB(42, 24),
+ new ECB(1, 25)),
+ new ECBlocks(30, new ECB(23, 15),
+ new ECB(28, 16))),
+ new Version(32, new int[]{6, 34, 60, 86, 112, 138},
+ new ECBlocks(30, new ECB(17, 115)),
+ new ECBlocks(28, new ECB(10, 46),
+ new ECB(23, 47)),
+ new ECBlocks(30, new ECB(10, 24),
+ new ECB(35, 25)),
+ new ECBlocks(30, new ECB(19, 15),
+ new ECB(35, 16))),
+ new Version(33, new int[]{6, 30, 58, 86, 114, 142},
+ new ECBlocks(30, new ECB(17, 115),
+ new ECB(1, 116)),
+ new ECBlocks(28, new ECB(14, 46),
+ new ECB(21, 47)),
+ new ECBlocks(30, new ECB(29, 24),
+ new ECB(19, 25)),
+ new ECBlocks(30, new ECB(11, 15),
+ new ECB(46, 16))),
+ new Version(34, new int[]{6, 34, 62, 90, 118, 146},
+ new ECBlocks(30, new ECB(13, 115),
+ new ECB(6, 116)),
+ new ECBlocks(28, new ECB(14, 46),
+ new ECB(23, 47)),
+ new ECBlocks(30, new ECB(44, 24),
+ new ECB(7, 25)),
+ new ECBlocks(30, new ECB(59, 16),
+ new ECB(1, 17))),
+ new Version(35, new int[]{6, 30, 54, 78, 102, 126, 150},
+ new ECBlocks(30, new ECB(12, 121),
+ new ECB(7, 122)),
+ new ECBlocks(28, new ECB(12, 47),
+ new ECB(26, 48)),
+ new ECBlocks(30, new ECB(39, 24),
+ new ECB(14, 25)),
+ new ECBlocks(30, new ECB(22, 15),
+ new ECB(41, 16))),
+ new Version(36, new int[]{6, 24, 50, 76, 102, 128, 154},
+ new ECBlocks(30, new ECB(6, 121),
+ new ECB(14, 122)),
+ new ECBlocks(28, new ECB(6, 47),
+ new ECB(34, 48)),
+ new ECBlocks(30, new ECB(46, 24),
+ new ECB(10, 25)),
+ new ECBlocks(30, new ECB(2, 15),
+ new ECB(64, 16))),
+ new Version(37, new int[]{6, 28, 54, 80, 106, 132, 158},
+ new ECBlocks(30, new ECB(17, 122),
+ new ECB(4, 123)),
+ new ECBlocks(28, new ECB(29, 46),
+ new ECB(14, 47)),
+ new ECBlocks(30, new ECB(49, 24),
+ new ECB(10, 25)),
+ new ECBlocks(30, new ECB(24, 15),
+ new ECB(46, 16))),
+ new Version(38, new int[]{6, 32, 58, 84, 110, 136, 162},
+ new ECBlocks(30, new ECB(4, 122),
+ new ECB(18, 123)),
+ new ECBlocks(28, new ECB(13, 46),
+ new ECB(32, 47)),
+ new ECBlocks(30, new ECB(48, 24),
+ new ECB(14, 25)),
+ new ECBlocks(30, new ECB(42, 15),
+ new ECB(32, 16))),
+ new Version(39, new int[]{6, 26, 54, 82, 110, 138, 166},
+ new ECBlocks(30, new ECB(20, 117),
+ new ECB(4, 118)),
+ new ECBlocks(28, new ECB(40, 47),
+ new ECB(7, 48)),
+ new ECBlocks(30, new ECB(43, 24),
+ new ECB(22, 25)),
+ new ECBlocks(30, new ECB(10, 15),
+ new ECB(67, 16))),
+ new Version(40, new int[]{6, 30, 58, 86, 114, 142, 170},
+ new ECBlocks(30, new ECB(19, 118),
+ new ECB(6, 119)),
+ new ECBlocks(28, new ECB(18, 47),
+ new ECB(31, 48)),
+ new ECBlocks(30, new ECB(34, 24),
+ new ECB(34, 25)),
+ new ECBlocks(30, new ECB(20, 15),
+ new ECB(61, 16)))
+ };
+ }
+
+}
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