/** * Create and load an image from a string. Format is auto-detected. * * @param string $string Binary data, i.e. from BLOB field in the database * @return WideImage_Image WideImage_PaletteImage or WideImage_TrueColorImage instance */ static function loadFromString($string) { if (strlen($string) < 128) { throw new WideImage_InvalidImageSourceException("String doesn't contain image data."); } $handle = @imagecreatefromstring($string); if (!self::isValidImageHandle($handle)) { $custom_mappers = WideImage_MapperFactory::getCustomMappers(); foreach ($custom_mappers as $mime_type => $mapper_class) { $mapper = WideImage_MapperFactory::selectMapper(null, $mime_type); $handle = $mapper->loadFromString($string); if (self::isValidImageHandle($handle)) { break; } } } if (!self::isValidImageHandle($handle)) { throw new WideImage_InvalidImageSourceException("String doesn't contain valid image data."); } return self::loadFromHandle($handle); }
/** * Returns binary string with image data in format specified by $format * * Additional parameters may be passed to the function. See WideImage_Image::saveToFile() for more details. * * @param string $format The format of the image * @return string The binary image data in specified format */ function asString($format) { ob_start(); $args = func_get_args(); $args[0] = null; array_unshift($args, $this->getHandle()); $mapper = WideImage_MapperFactory::selectMapper(null, $format); $res = call_user_func_array(array($mapper, 'save'), $args); if (!$res) { throw new WideImage_UnknownErrorWhileMappingException(get_class($mapper) . " returned an invalid result while writing the image data"); } return ob_get_clean(); }