/**
* Create an empty image with the given width and height.
*
* @param integer image width
* @param integer image height
* @return resource
*/
protected function _create($width, $height)
{
$filein = isset($this->filetmp) ? $this->filetmp : $this->file;
$fileout = tempnam(Upload::$default_directory, '');
$command = Image_ImageMagick::get_command('convert') . ' ' . escapeshellarg($filein);
$command .= ' -quality 100 -size ' . escapeshellarg($width) . 'x' . escapeshellarg($height) . ' -flatten';
$command .= ' ' . escapeshellarg('PNG:' . $fileout);
exec($command, $response, $status);
if (!$status) {
// Delete old tmp file if exist
if (isset($this->filetmp) && file_exists($this->filetmp)) {
unlink($this->filetmp);
}
// Get the image information
$info = $this->get_info($fileout);
// Update image data
$this->filetmp = $fileout;
$this->width = $info->width;
$this->height = $info->height;
return TRUE;
}
return FALSE;
}
protected function _do_render($type, $quality)
{
$tmpfile = tempnam(sys_get_temp_dir(), '');
// If tmp image file not exist, use original
$filein = !is_null($this->filetmp) ? $this->filetmp : $this->file;
$command = Image_ImageMagick::get_command('convert') . ' ' . escapeshellarg($filein);
$command .= isset($quality) ? ' -quality ' . escapeshellarg($quality) : '';
$command .= ' ' . escapeshellarg(strtoupper($type) . ':' . $tmpfile);
exec($command, $response, $status);
if (!$status) {
// Capture the output
ob_start();
readfile($tmpfile);
// Delete tmp file
unlink($tmpfile);
return ob_get_clean();
}
return FALSE;
}