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Initial support for DMRE

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This commit is contained in:
Sean Owen 2021-01-15 17:14:02 -06:00
parent 3374aed3fd
commit 395dc6b83f
3 changed files with 44 additions and 7 deletions
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14
core/src/main/java/com/google/zxing/common/BitMatrix.java
View file

@ -159,7 +159,7 @@ public final class BitMatrix implements Cloneable {
*/ */
public boolean get(int x, int y) { public boolean get(int x, int y) {
int offset = y * rowSize + (x / 32); int offset = y * rowSize + (x / 32);
return ((bits[offset] >>> (x & 0x1f)) & 1) != 0; return offset < bits.length && ((bits[offset] >>> (x & 0x1f)) & 1) != 0;
} }
/** /**
@ -170,12 +170,16 @@ public final class BitMatrix implements Cloneable {
*/ */
public void set(int x, int y) { public void set(int x, int y) {
int offset = y * rowSize + (x / 32); int offset = y * rowSize + (x / 32);
bits[offset] |= 1 << (x & 0x1f); if (offset < bits.length) {
bits[offset] |= 1 << (x & 0x1f);
}
} }
public void unset(int x, int y) { public void unset(int x, int y) {
int offset = y * rowSize + (x / 32); int offset = y * rowSize + (x / 32);
bits[offset] &= ~(1 << (x & 0x1f)); if (offset < bits.length) {
bits[offset] &= ~(1 << (x & 0x1f));
}
} }
/** /**
@ -186,7 +190,9 @@ public final class BitMatrix implements Cloneable {
*/ */
public void flip(int x, int y) { public void flip(int x, int y) {
int offset = y * rowSize + (x / 32); int offset = y * rowSize + (x / 32);
bits[offset] ^= 1 << (x & 0x1f); if (offset < bits.length) {
bits[offset] ^= 1 << (x & 0x1f);
}
} }
/** /**

5
core/src/main/java/com/google/zxing/datamatrix/decoder/BitMatrixParser.java
View file

@ -48,7 +48,7 @@ final class BitMatrixParser {
} }
/** /**
* <p>Creates the version object based on the dimension of the original bit matrix from * <p>Creates the version object based on the dimension of the original bit matrix from
* the datamatrix code.</p> * the datamatrix code.</p>
* *
* <p>See ISO 16022:2006 Table 7 - ECC 200 symbol attributes</p> * <p>See ISO 16022:2006 Table 7 - ECC 200 symbol attributes</p>
@ -136,7 +136,8 @@ final class BitMatrixParser {
} }
} while ((row < numRows) || (column < numColumns)); } while ((row < numRows) || (column < numColumns));
if (resultOffset != version.getTotalCodewords()) { if (resultOffset != version.getTotalCodewords() &&
resultOffset != version.getTotalCodewords() - 1) {
throw FormatException.getFormatInstance(); throw FormatException.getFormatInstance();
} }
return result; return result;

32
core/src/main/java/com/google/zxing/datamatrix/decoder/Version.java
View file

@ -230,7 +230,37 @@ public final class Version {
new Version(29, 16, 36, 14, 16, new Version(29, 16, 36, 14, 16,
new ECBlocks(24, new ECB(1, 32))), new ECBlocks(24, new ECB(1, 32))),
new Version(30, 16, 48, 14, 22, new Version(30, 16, 48, 14, 22,
new ECBlocks(28, new ECB(1, 49))) new ECBlocks(28, new ECB(1, 49))),
// extended forms as specified in
// AIM-D - Symbology Specification – Data Matrix Rectangular Extension (DMRE)
// Revision 1.0 September 22, 2014
new Version(31, 8, 48, 6, 22,
new ECBlocks(15, new ECB(1, 18))),
new Version(32, 8, 64, 6, 14,
new ECBlocks(18, new ECB(1, 24))),
new Version(33, 12, 48, 10, 22,
new ECBlocks(23, new ECB(1, 32))),
new Version(34, 12, 64, 10, 14,
new ECBlocks(27, new ECB(1, 43))),
new Version(35, 16, 64, 14, 14,
new ECBlocks(36, new ECB(1, 62))),
new Version(36, 24, 32, 22, 14,
new ECBlocks(28, new ECB(1, 49))),
new Version(37, 24, 36, 22, 16,
new ECBlocks(33, new ECB(1, 55))),
new Version(38, 24, 48, 22, 22,
new ECBlocks(41, new ECB(1, 80))),
new Version(39, 24, 64, 22, 14,
new ECBlocks(46, new ECB(1, 108))),
new Version(40, 26, 32, 24, 14,
new ECBlocks(32, new ECB(1, 52))),
new Version(41, 26, 40, 24, 18,
new ECBlocks(38, new ECB(1, 70))),
new Version(42, 26, 48, 24, 22,
new ECBlocks(42, new ECB(1, 90))),
new Version(43, 26, 64, 24, 14,
new ECBlocks(50, new ECB(1, 118)))
}; };
} }