Yes; having use [font=“Courier New”]ghostscript[/font] and some ajax to render images and page’ snapshots from pdf file.
In fact, here it is the Controller which calls [font="Courier New"]gs[/font]:
class ImageController extends RController
{
protected $image;
protected $image_type;
public function actionIndex( $file, $resize = Null, $resizeToWidth = Null, $page = 1 )
{
if( $file )
{
ob_end_clean();
$filename = Yii::app()->basePath . '/data/' . $file;
if( strtolower( pathinfo( $filename, PATHINFO_EXTENSION ) ) == 'pdf' )
{
if( empty( $resize ) )
$resize = '10x10';
if( !is_dir( '/tmp/' . Yii::app()->getRequest()->getServerName() . '/' ) )
$status = mkdir( '/tmp/' . Yii::app()->getRequest()->getServerName() . '/', 0777, True );
$output = '/tmp/' . Yii::app()->getRequest()->getServerName() . '/' . md5( $filename . $resize . $page ) . '.jpeg';
if( !is_file( $output ) )
exec( "gs -dNOPAUSE -dPARANOIDSAFER -dBufferSpace=1000000000 -dBandHeight=100 -dBandBufferSpace=500000000 -dBATCH -dQUIET -sDEVICE=jpeg -dNOGC -dNumRenderingThreads=4 -dFirstPage=$page -dLastPage=$page -r$resize -sOutputFile=$output '$filename'" );
$resize = Null;
$resizeToWidth = Null;
$filename = $output;
}
$this->loadImage( $filename );
if( !empty( $resize ) )
{
$resize = explode( 'x', $resize, 2 );
$this->resize( (int) $resize[0], (int) $resize[1] );
}
elseif( !empty( $resizeToWidth ) )
$this->resizeToWidth( (int) $resizeToWidth );
$this->output();
Yii::app()->end();
}
}
protected function loadImage( $filename )
{
$image_info = getimagesize($filename);
$this->image_type = $image_info[2];
if( $this->image_type == IMAGETYPE_JPEG )
$this->image = imagecreatefromjpeg($filename);
elseif( $this->image_type == IMAGETYPE_GIF )
$this->image = imagecreatefromgif($filename);
elseif( $this->image_type == IMAGETYPE_PNG )
$this->image = imagecreatefrompng($filename);
}
protected function saveImage( $filename, $image_type = IMAGETYPE_JPEG, $compression= 75, $permissions = Null )
{
if( $image_type == IMAGETYPE_JPEG )
imagejpeg( $this->image, $filename, $compression);
elseif( $image_type == IMAGETYPE_GIF )
imagegif($this->image,$filename);
elseif( $image_type == IMAGETYPE_PNG )
imagepng($this->image,$filename);
if( $permissions!= null )
chmod( $filename, $permissions );
}
protected function output( $image_type = IMAGETYPE_JPEG )
{
if( $image_type == IMAGETYPE_JPEG )
{
header( "Content-type: image/jpeg");
imagejpeg($this->image);
}
elseif( $image_type == IMAGETYPE_GIF )
{
header( "Content-type: image/gif");
imagegif($this->image);
}
elseif( $image_type == IMAGETYPE_PNG )
{
header( "Content-type: image/png");
imagepng($this->image);
}
}
protected function getWidth()
{
return imagesx($this->image);
}
protected function getHeight()
{
return imagesy($this->image);
}
protected function resizeToHeight($height)
{
$ratio = $height / $this->getHeight();
$width = $this->getWidth() * $ratio;
$this->resize($width,$height);
}
protected function resizeToWidth($width)
{
$ratio = $width / $this->getWidth();
$height = $this->getheight() * $ratio;
$this->resize($width,$height);
}
protected function scale($scale)
{
$width = $this->getWidth() * $scale/100;
$height = $this->getheight() * $scale/100;
$this->resize($width,$height);
}
protected function resize($width,$height)
{
$new_image = imagecreatetruecolor($width, $height);
imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
$this->image = $new_image;
}
}
For views’ layouts I use [font=“Courier New”]jquery.waypoints[/font] and [font=“Courier New”]jquery.layout[/font] scripts. The first script helps in order to make a lazy loader for the images, the second provides a framework for the layout (north, center, left, south) of the screen.
cbi
