/usr/share/php/Horde/Image/Effect/Im/PhotoStack.php is in php-horde-image 2.1.0-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Effect for composing multiple images into a single image.
*
* Copyright 2007-2014 Horde LLC (http://www.horde.org/)
*
* The technique for the Polaroid-like stack using the Imagick extension is
* credited to Mikko Koppanen and is documented at http://valokuva.org
*
* @author Michael J. Rubinsky <mrubinsk@horde.org>
* @package Image
*/
class Horde_Image_Effect_Im_PhotoStack extends Horde_Image_Effect
{
/**
* Valid parameters for the stack effect
*
* images - An array of Horde_Image objects to stack. Images
* are stacked in a FIFO manner, so that the top-most
* image is the last one in this array.
*
* type - Determines the style for the composition.
* 'plain' or 'polaroid' are supported.
*
* resize_height - The height that each individual thumbnail
* should be resized to before composing on the image.
*
* padding - How much padding should we ensure is left around
* the active image area?
*
* background - The background canvas color - this is used as the
* color to set any padding to.
*
* bordercolor - If using type 'plain' this sets the color of the
* border that each individual thumbnail gets.
*
* borderwidth - If using type 'plain' this sets the width of the
* border on each individual thumbnail.
*
* offset - If using type 'plain' this determines the amount of
* x and y offset to give each successive image when
* it is placed on the top of the stack.
*
* @var array
*/
protected $_params = array('type' => 'plain',
'resize_height' => '150',
'padding' => 0,
'background' => 'none',
'bordercolor' => '#333',
'borderwidth' => 1,
'borderrounding' => 10,
'offset' => 5);
/**
* Create the photo_stack
*
*/
public function apply()
{
$i = 1;
$cnt = count($this->_params['images']);
if ($cnt <=0) {
throw new Horde_Image_Exception('No Images provided.');
}
// Start out fresh.
$this->_image->raw();
switch ($this->_params['type']) {
case 'plain':
case 'rounded':
// Get top image dimensions, then force each bottom image to the
// same dimensions.
$this->_params['images'][$cnt - 1]->resize($this->_params['resize_height'],
$this->_params['resize_height'],
true);
$size = $this->_params['images'][$cnt - 1]->getDimensions();
$xo = $yo = (count($this->_params['images'])) * $this->_params['offset'];
$ops = '';
$haveBottom = false;
foreach ($this->_params['images'] as $image) {
$image->resize($size['height'], $size['width'], false);
$xo -= $this->_params['offset'];
$yo -= $this->_params['offset'];
if ($this->_params['type'] == 'rounded') {
$temp = $this->_roundBorder($image);
} else {
$temp = $image->toFile();
}
$this->_image->addFileToClean($temp);
$ops .= ' \( ' . $temp . ' -background none -thumbnail ' . $size['width'] . 'x' . $size['height'] . '! -repage +' . $xo . '+' . $yo . ($this->_params['type'] == 'plain' ? ' -bordercolor "#333" -border 1 ' : ' ' ) . ((!$haveBottom) ? '\( +clone -shadow 80x3+4+4 \) +swap -mosaic' : '') . ' \) ';
$haveBottom = true;
}
// The first -background none option below is only honored in
// convert versions before 6.4 it seems. Without it specified as
// none here, all stacks come out with a white background.
$this->_image->addPostSrcOperation($ops . ' -background ' . $this->_params['background'] . ' -mosaic -bordercolor ' . $this->_params['background'] . ' -border ' . $this->_params['padding']);
break;
case 'polaroid':
// Check for im version > 6.3.2
$ver = $this->_image->getIMVersion();
if (is_array($ver) && version_compare($ver[0], '6.3.2') >= 0) {
$ops = '';
foreach ($this->_params['images'] as $image) {
$temp = $image->toFile();
// Remember the temp files so we can nuke them later.
$this->_image->addFileToClean($temp);
// Don't rotate the top image.
if ($i++ == $cnt) {
$angle = 0;
} else {
$angle = mt_rand(1, 45);
if (mt_rand(1, 2) % 2 === 0) {
$angle = $angle * -1;
}
}
$ops .= ' \( ' . $temp . ' -geometry +' . mt_rand(1, $this->_params['resize_height']) . '+' . mt_rand(1, $this->_params['resize_height']) . ' -thumbnail \'' . $this->_params['resize_height'] . 'x' . $this->_params['resize_height'] . '>\' -bordercolor Snow -border 1 -polaroid ' . $angle . ' \) ';
}
$this->_image->addPostSrcOperation('-background none' . $ops . '-mosaic -bordercolor ' . $this->_params['background'] . ' -border ' . $this->_params['padding']);
} else {
// An attempt at a -polaroid command free version of this
// effect based on various examples and ideas at
// http://imagemagick.org
$ops = '';
foreach ($this->_params['images'] as $image) {
$temp = $image->toFile();
$this->_image->addFileToClean($temp);
if ($i++ == $cnt) {
$angle = 0;
} else {
$angle = mt_rand(1, 45);
if (mt_rand(1, 2) % 2 === 0) {
$angle = $angle * -1;
}
}
$ops .= '\( ' . $temp . ' -thumbnail \'' . $this->_params['resize_height'] . 'x' . $this->_params['resize_height']. '>\' -bordercolor "#eee" -border 4 -bordercolor grey90 -border 1 -bordercolor none -background none -rotate ' . $angle . ' -background none \( +clone -shadow 60x4+4+4 \) +swap -background none -flatten \) ';
}
$this->_image->addPostSrcOperation('-background none ' . $ops . '-mosaic -trim +repage -bordercolor ' . $this->_params['background'] . ' -border ' . $this->_params['padding']);
}
break;
}
return true;
}
private function _roundBorder($image)
{
$context = array('tmpdir' => $this->_image->getTmpDir(),
'convert' => $this->_image->getConvertPath());
$size = $image->getDimensions();
$new = new Horde_Image_Im(array('data' => $image->raw()), $context);
$new->addEffect('RoundCorners', array('border' => 2, 'bordercolor' => '#111', 'background' => 'none'));
$new->applyEffects();
return $new->toFile();
}
}
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