/**
* 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);
}
/**
* Outputs the image to browser
*
* Sets headers Content-length and Content-type, and echoes the image in the specified format.
* All other headers (such as Content-disposition) must be added manually.
*
* Example:
* <code>
* WideImage::load('image1.png')->resize(100, 100)->output('gif');
* </code>
*
* @param string $format Image format
*/
function output($format)
{
$args = func_get_args();
$data = call_user_func_array(array($this, 'asString'), $args);
$this->writeHeader('Content-length', strlen($data));
$this->writeHeader('Content-type', WideImage_MapperFactory::mimeType($format));
echo $data;
}