127 lines
3.3 KiB
PHP
127 lines
3.3 KiB
PHP
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<?php
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/**
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* @author Gasper Kozak
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* @copyright 2007-2011
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This file is part of WideImage.
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WideImage is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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WideImage is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with WideImage; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* @package WideImage
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**/
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/**
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* Thrown when image format isn't supported
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*
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* @package Exceptions
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*/
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class WideImage_UnsupportedFormatException extends WideImage_Exception {}
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/**
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* Mapper factory
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*
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* @package Internals
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**/
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abstract class WideImage_MapperFactory
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{
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static protected $mappers = array();
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static protected $customMappers = array();
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static protected $mimeTable = array(
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'image/jpg' => 'JPEG',
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'image/jpeg' => 'JPEG',
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'image/pjpeg' => 'JPEG',
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'image/gif' => 'GIF',
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'image/png' => 'PNG'
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);
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/**
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* Returns a mapper, based on the $uri and $format
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*
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* @param string $uri File URI
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* @param string $format File format (extension or mime-type) or null
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* @return WideImage_Mapper
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**/
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static function selectMapper($uri, $format = null)
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{
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$format = self::determineFormat($uri, $format);
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if (array_key_exists($format, self::$mappers))
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return self::$mappers[$format];
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$mapperClassName = 'WideImage_Mapper_' . $format;
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if (!class_exists($mapperClassName, false))
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{
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$mapperFileName = WideImage::path() . 'Mapper/' . $format . '.php';
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if (file_exists($mapperFileName))
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require_once $mapperFileName;
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}
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if (class_exists($mapperClassName))
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{
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self::$mappers[$format] = new $mapperClassName();
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return self::$mappers[$format];
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}
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throw new WideImage_UnsupportedFormatException("Format '{$format}' is not supported.");
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}
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static function registerMapper($mapper_class_name, $mime_type, $extension)
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{
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self::$customMappers[$mime_type] = $mapper_class_name;
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self::$mimeTable[$mime_type] = $extension;
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}
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static function getCustomMappers()
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{
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return self::$customMappers;
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}
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static function determineFormat($uri, $format = null)
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{
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if ($format == null)
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$format = self::extractExtension($uri);
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// mime-type match
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if (preg_match('~[a-z]*/[a-z-]*~i', $format))
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if (isset(self::$mimeTable[strtolower($format)]))
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{
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return self::$mimeTable[strtolower($format)];
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}
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// clean the string
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$format = strtoupper(preg_replace('/[^a-z0-9_-]/i', '', $format));
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if ($format == 'JPG')
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$format = 'JPEG';
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return $format;
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}
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static function mimeType($format)
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{
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return array_search(strtoupper($format), self::$mimeTable);
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}
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static function extractExtension($uri)
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{
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$p = strrpos($uri, '.');
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if ($p === false)
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return '';
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else
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return substr($uri, $p + 1);
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}
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}
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