mirror of
https://git.code.sf.net/p/seeddms/code
synced 2024-11-26 15:32:13 +00:00
102 lines
3.2 KiB
PHP
102 lines
3.2 KiB
PHP
<?php
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/**
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* Implementation of conversion service pdf class
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*
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* @category DMS
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* @package SeedDMS
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* @license GPL 2
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* @version @version@
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* @author Uwe Steinmann <uwe@steinmann.cx>
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* @copyright Copyright (C) 2021 Uwe Steinmann
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* @version Release: @package_version@
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*/
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require_once("inc/inc.ClassConversionServiceBase.php");
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/**
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* Implementation of conversion service pdf class
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*
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* @category DMS
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* @package SeedDMS
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* @author Uwe Steinmann <uwe@steinmann.cx>
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* @copyright Copyright (C) 2021 Uwe Steinmann
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* @version Release: @package_version@
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*/
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class SeedDMS_ConversionServicePdfToImage extends SeedDMS_ConversionServiceBase {
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/**
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* timeout
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*/
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public $timeout;
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public function __construct($from, $to) { /* {{{ */
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parent::__construct();
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$this->from = $from;
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$this->to = $to;
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$this->timeout = 5;
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} /* }}} */
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public function getInfo() { /* {{{ */
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return "Convert with imagick php functions";
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} /* }}} */
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public function getAdditionalParams() { /* {{{ */
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return [
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['name'=>'width', 'type'=>'number', 'description'=>'Width of converted image'],
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['name'=>'page', 'type'=>'number', 'description'=>'Page of Pdf document'],
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];
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} /* }}} */
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public function convert($infile, $target = null, $params = array()) { /* {{{ */
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$start = microtime(true);
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$imagick = new Imagick();
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/* Setting a smaller resolution will speed up the conversion
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* A resolution of 72,72 will create a 596x842 image
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* Setting it to 36,36 will create a 298x421 image which should
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* be sufficient in most cases, but keep in mind that images are
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* not scaled up. Hence, a width of 400px still results in a 298px
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* wide image
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*/
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$imagick->setResolution(72,72);
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$page = 0;
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if(!empty($params['page']) && intval($params['page']) > 0)
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$page = intval($params['page'])-1;
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try {
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if($imagick->readImage($infile.'['.$page.']')) {
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if(!empty($params['width']))
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$imagick->scaleImage(min((int) $params['width'], $imagick->getImageWidth()), 0);
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/* Remove alpha channel and set to white */
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$imagick->setImageBackgroundColor('white');
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/* Setting the color-type and bit-depth produces much smaller images
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* because the default depth appears to be 16 bit
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*/
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$imagick->setOption('png:color-type', 6);
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$imagick->setOption('png:bit-depth', 8);
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$imagick->setImageAlphaChannel(Imagick::ALPHACHANNEL_REMOVE);
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$imagick->mergeImageLayers(Imagick::LAYERMETHOD_FLATTEN);
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$imagick->setImageFormat('png');
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$end = microtime(true);
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if($this->logger) {
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$this->logger->log('Conversion from '.$this->from.' to '.$this->to.' with pdf service took '.($end-$start).' sec.', PEAR_LOG_INFO);
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}
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if($target) {
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return $imagick->writeImage($target);
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} else {
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return $imagick->getImageBlob();
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}
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} else {
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if($this->logger) {
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$this->logger->log('Conversion from '.$this->from.' to '.$this->to.' with pdf service failed: could not read input file.', PEAR_LOG_ERR);
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}
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}
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} catch (ImagickException $e) {
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if($this->logger) {
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$this->logger->log('Conversion from '.$this->from.' to '.$this->to.' with pdf service failed: '.$e->getMessage(), PEAR_LOG_ERR);
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}
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$this->success = false;
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return false;
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}
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return false;
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} /* }}} */
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}
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