/**
* @dataProvider dataMaskBitProvider
* @param integer $maskPattern
* @param array $expected
* @return void
*/
public function testGetDatMaskBit($maskPattern, array $expected)
{
for ($x = 0; $x < 6; $x++) {
for ($y = 0; $y < 6; $y++) {
if (($expected[$y][$x] === 1) !== MaskUtil::getDataMaskBit($maskPattern, $x, $y)) {
$this->fail('Data mask bit did not match');
}
}
}
}
/**
* Embeds "dataBits" using "getMaskPattern".
*
* For debugging purposes, it skips masking process if "getMaskPattern" is
* -1. See 8.7 of JISX0510:2004 (p.38) for how to embed data bits.
*
* @param BitArray $dataBits
* @param integer $maskPattern
* @param ByteMatrix $matrix
* @return void
* @throws Exception\WriterException
*/
protected static function embedDataBits(BitArray $dataBits, $maskPattern, ByteMatrix $matrix)
{
$bitIndex = 0;
$direction = -1;
// Start from the right bottom cell.
$x = $matrix->getWidth() - 1;
$y = $matrix->getHeight() - 1;
while ($x > 0) {
// Skip vertical timing pattern.
if ($x === 6) {
$x--;
}
while ($y >= 0 && $y < $matrix->getHeight()) {
for ($i = 0; $i < 2; $i++) {
$xx = $x - $i;
// Skip the cell if it's not empty.
if ($matrix->get($xx, $y) !== -1) {
continue;
}
if ($bitIndex < $dataBits->getSize()) {
$bit = $dataBits->get($bitIndex);
$bitIndex++;
} else {
// Padding bit. If there is no bit left, we'll fill the
// left cells with 0, as described in 8.4.9 of
// JISX0510:2004 (p. 24).
$bit = false;
}
// Skip masking if maskPattern is -1.
if ($maskPattern !== -1 && MaskUtil::getDataMaskBit($maskPattern, $xx, $y)) {
$bit = !$bit;
}
$matrix->set($xx, $y, $bit);
}
$y += $direction;
}
$direction = -$direction;
$y += $direction;
$x -= 2;
}
// All bits should be consumed
if ($bitIndex !== $dataBits->getSize()) {
throw new Exception\WriterException('Not all bits consumed (' . $bitIndex . ' out of ' . $dataBits->getSize() . ')');
}
}
