94 lines
3.2 KiB
PHP
94 lines
3.2 KiB
PHP
|
<?php
|
||
|
|
/*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
namespace Zxing\Common;
|
||
|
|
|
||
|
|
use Zxing\NotFoundException;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @author Sean Owen
|
||
|
|
*/
|
||
|
|
final class DefaultGridSampler extends GridSampler
|
||
|
|
{
|
||
|
|
//@Override
|
||
|
|
public function sampleGrid(
|
||
|
|
$image,
|
||
|
|
$dimensionX,
|
||
|
|
$dimensionY,
|
||
|
|
$p1ToX, $p1ToY,
|
||
|
|
$p2ToX, $p2ToY,
|
||
|
|
$p3ToX, $p3ToY,
|
||
|
|
$p4ToX, $p4ToY,
|
||
|
|
$p1FromX, $p1FromY,
|
||
|
|
$p2FromX, $p2FromY,
|
||
|
|
$p3FromX, $p3FromY,
|
||
|
|
$p4FromX, $p4FromY
|
||
|
|
) {
|
||
|
|
|
||
|
|
$transform = PerspectiveTransform::quadrilateralToQuadrilateral(
|
||
|
|
$p1ToX, $p1ToY, $p2ToX, $p2ToY, $p3ToX, $p3ToY, $p4ToX, $p4ToY,
|
||
|
|
$p1FromX, $p1FromY, $p2FromX, $p2FromY, $p3FromX, $p3FromY, $p4FromX, $p4FromY);
|
||
|
|
|
||
|
|
return $this->sampleGrid_($image, $dimensionX, $dimensionY, $transform);
|
||
|
|
}
|
||
|
|
|
||
|
|
//@Override
|
||
|
|
public function sampleGrid_(
|
||
|
|
$image,
|
||
|
|
$dimensionX,
|
||
|
|
$dimensionY,
|
||
|
|
$transform
|
||
|
|
) {
|
||
|
|
if ($dimensionX <= 0 || $dimensionY <= 0) {
|
||
|
|
throw NotFoundException::getNotFoundInstance();
|
||
|
|
}
|
||
|
|
$bits = new BitMatrix($dimensionX, $dimensionY);
|
||
|
|
$points = fill_array(0, 2 * $dimensionX, 0.0);
|
||
|
|
for ($y = 0; $y < $dimensionY; $y++) {
|
||
|
|
$max = count($points);
|
||
|
|
$iValue = (float)$y + 0.5;
|
||
|
|
for ($x = 0; $x < $max; $x += 2) {
|
||
|
|
$points[$x] = (float)($x / 2) + 0.5;
|
||
|
|
$points[$x + 1] = $iValue;
|
||
|
|
}
|
||
|
|
$transform->transformPoints($points);
|
||
|
|
// Quick check to see if points transformed to something inside the image;
|
||
|
|
// sufficient to check the endpoints
|
||
|
|
$this->checkAndNudgePoints($image, $points);
|
||
|
|
try {
|
||
|
|
for ($x = 0; $x < $max; $x += 2) {
|
||
|
|
if ($image->get((int)$points[$x], (int)$points[$x + 1])) {
|
||
|
|
// Black(-ish) pixel
|
||
|
|
$bits->set($x / 2, $y);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} catch (\Exception $aioobe) {//ArrayIndexOutOfBoundsException
|
||
|
|
// This feels wrong, but, sometimes if the finder patterns are misidentified, the resulting
|
||
|
|
// transform gets "twisted" such that it maps a straight line of points to a set of points
|
||
|
|
// whose endpoints are in bounds, but others are not. There is probably some mathematical
|
||
|
|
// way to detect this about the transformation that I don't know yet.
|
||
|
|
// This results in an ugly runtime exception despite our clever checks above -- can't have
|
||
|
|
// that. We could check each point's coordinates but that feels duplicative. We settle for
|
||
|
|
// catching and wrapping ArrayIndexOutOfBoundsException.
|
||
|
|
throw NotFoundException::getNotFoundInstance();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $bits;
|
||
|
|
}
|
||
|
|
}
|