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home/lakoyani/e-learn.mltcfiji.com/vendor/khanamiryan/qrcode-detector-decoder/lib/BinaryBitmap.php 0000777 00000012673 14711036454 0027356 0 ustar 00 <?php /* * Copyright 2009 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; use Zxing\Common\BitArray; use Zxing\Common\BitMatrix; /** * This class is the core bitmap class used by ZXing to represent 1 bit data. Reader objects * accept a BinaryBitmap and attempt to decode it. * * @author dswitkin@google.com (Daniel Switkin) */ final class BinaryBitmap { private $binarizer; private $matrix; public function __construct($binarizer) { if ($binarizer == null) { throw new \InvalidArgumentException("Binarizer must be non-null."); } $this->binarizer = $binarizer; } /** * @return The width of the bitmap. */ public function getWidth() { return $this->binarizer->getWidth(); } /** * @return The height of the bitmap. */ public function getHeight() { return $this->binarizer->getHeight(); } /** * Converts one row of luminance data to 1 bit data. May actually do the conversion, or return * cached data. Callers should assume this method is expensive and call it as seldom as possible. * This method is intended for decoding 1D barcodes and may choose to apply sharpening. * * @param y The row to fetch, which must be in [0, bitmap height) * @param row An optional preallocated array. If null or too small, it will be ignored. * If used, the Binarizer will call BitArray.clear(). Always use the returned object. * @return The array of bits for this row (true means black). * @throws NotFoundException if row can't be binarized */ public function getBlackRow($y, $row) { return $this->binarizer->getBlackRow($y, $row); } /** * Converts a 2D array of luminance data to 1 bit. As above, assume this method is expensive * and do not call it repeatedly. This method is intended for decoding 2D barcodes and may or * may not apply sharpening. Therefore, a row from this matrix may not be identical to one * fetched using getBlackRow(), so don't mix and match between them. * * @return The 2D array of bits for the image (true means black). * @throws NotFoundException if image can't be binarized to make a matrix */ public function getBlackMatrix(){ // The matrix is created on demand the first time it is requested, then cached. There are two // reasons for this: // 1. This work will never be done if the caller only installs 1D Reader objects, or if a // 1D Reader finds a barcode before the 2D Readers run. // 2. This work will only be done once even if the caller installs multiple 2D Readers. if ($this->matrix == null) { $this->matrix = $this->binarizer->getBlackMatrix(); } return $this->matrix; } /** * @return Whether this bitmap can be cropped. */ public function isCropSupported() { return $this->binarizer->getLuminanceSource()->isCropSupported(); } /** * Returns a new object with cropped image data. Implementations may keep a reference to the * original data rather than a copy. Only callable if isCropSupported() is true. * * @param left The left coordinate, which must be in [0,getWidth()) * @param top The top coordinate, which must be in [0,getHeight()) * @param width The width of the rectangle to crop. * @param height The height of the rectangle to crop. * @return A cropped version of this object. */ public function crop($left, $top, $width, $height) { $newSource = $this->binarizer->getLuminanceSource()->crop($left, $top, $width, $height); return new BinaryBitmap($this->binarizer->createBinarizer($newSource)); } /** * @return Whether this bitmap supports counter-clockwise rotation. */ public function isRotateSupported() { return $this->binarizer->getLuminanceSource()->isRotateSupported(); } /** * Returns a new object with rotated image data by 90 degrees counterclockwise. * Only callable if {@link #isRotateSupported()} is true. * * @return A rotated version of this object. */ public function rotateCounterClockwise() { $newSource = $this->binarizer->getLuminanceSource()->rotateCounterClockwise(); return new BinaryBitmap($this->binarizer->createBinarizer($newSource)); } /** * Returns a new object with rotated image data by 45 degrees counterclockwise. * Only callable if {@link #isRotateSupported()} is true. * * @return A rotated version of this object. */ public function rotateCounterClockwise45() { $newSource = $this->binarizer->getLuminanceSource()->rotateCounterClockwise45(); return new BinaryBitmap($this->binarizer->createBinarizer($newSource)); } //@Override public function toString() { try { return $this->getBlackMatrix()->toString(); } catch (NotFoundException $e) { return ""; } } }
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