function domain_get_screen_dimensions($domain) {
$dom = $this->get_domain_object($domain);
$tmp = libvirt_domain_get_screen_dimensions($dom, $this->get_hostname() );
return ($tmp) ? $tmp : $this->_set_last_error();
}
/**
* fetch and store a screenshot of an active virtual machine on the virt host
*
* @global resource $host_conn libvirt connection
*
* @param string $vm_virt_id virt_id of the vm
* @param string $virt_host_name virt_id of host
* @param int $max_width width of screenshot (height determined by ratio)
*
* @return string filename of JPG
*/
function ace_kvm_vm_screenshot($vm_virt_id, $virt_host_name, $max_width)
{
global $host_conn;
// $xSize = 160;
// $ySize = 120;
$vm_res = libvirt_domain_lookup_by_name($host_conn, $vm_virt_id);
ace_kvm_log_last_error();
$screenshot_dimensions = libvirt_domain_get_screen_dimensions($vm_res, $virt_host_name);
ace_kvm_log_last_error();
$screenshot_width = $screenshot_dimensions['width'];
$screenshot_height = $screenshot_dimensions['height'];
$resize_factor = $screenshot_width / $max_width;
$desired_screenshot_width = ceil($screenshot_width / $resize_factor);
$desired_screenshot_height = ceil($screenshot_height / $resize_factor);
//$time[] = microtime(TRUE);
$screenshot = libvirt_domain_get_screenshot_api($vm_res, 0);
ace_kvm_log_last_error();
if ($screenshot) {
//$time[] = microtime(TRUE);
$temp_filename = $screenshot['file'];
//echo d($temp_filename);
$image = new Imagick($temp_filename);
$image->setFormat('jpeg');
#resizeImage(xRes,yRes,FILTER,sharp/blurry,bestfit)
//$image->resizeImage($desired_screenshot_width,$desired_screenshot_height,Imagick::FILTER_POINT,0.5,TRUE);
//$time[] = microtime(TRUE);
//echo d($image);
$image->thumbnailimage(180, 0);
//$time[] = microtime(TRUE);
$jpg_filename = './screenshots/' . $vm_virt_id . '_thumb.jpg';
$image->writeImage($jpg_filename);
//$time[] = microtime(TRUE);
$image->clear();
$image->destroy();
//$time[] = microtime(TRUE);
unlink($temp_filename);
#delete the /tmp/ file
//$time[] = microtime(TRUE);
} else {
$jpg_filename = '';
}
/*
echo '<pre>Screenshot timing';
echo '<table>';
echo '<tr><td>libvirt_domain_get_screenshot_api</td><td align="right">' . round((($time[1] - $time[0]) * 1000),3) . '</td></tr>';
echo '<tr><td>$image = new Imagick($temp_filename)</td><td align="right">' . round((($time[2] - $time[1]) * 1000),3) . '</td></tr>';
echo '<tr><td>$image->thumbnailimage(180,0)</td><td align="right">' . round((($time[3] - $time[2]) * 1000),3) . '</td></tr>';
echo '<tr><td>$image->writeImage($jpg_filename)</td><td align="right">' . round((($time[4] - $time[3]) * 1000),3) . '</td></tr>';
echo '<tr><td>$image->destroy()</td><td align="right">' . round((($time[5] - $time[4]) * 1000),3) . '</td></tr>';
echo '<tr><td>unlink($temp_filename)</td><td align="right">' . round((($time[6] - $time[5]) * 1000),3) . '</td></tr>';
echo '<tr><td>TOTAL</td><td align="right">' . round((($time[6] - $time[0]) * 1000),3) . '</td></tr>';
echo '</table></pre>';
echo d($time);
*/
return $jpg_filename;
}
