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<?php
/**
* Copyright 2007-2017 Horde LLC (http://www.horde.org/)
*
* See the enclosed file LICENSE for license information (LGPL). If you
* did not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* @author Michael J. Rubinsky <mrubinsk@horde.org>
* @category Horde
* @license http://www.horde.org/licenses/lgpl21 LGPL-2.1
* @package Image
*/
/**
* Effect for composing multiple images into a single image.
*
* 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>
* @category Horde
* @copyright 2007-2017 Horde LLC
* @license http://www.horde.org/licenses/lgpl21 LGPL-2.1
* @package Image
*/
class Horde_Image_Effect_Im_PhotoStack extends Horde_Image_Effect
{
/**
* Valid parameters for the stack effect:
* - images: (array) 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: (string) Determines the style for the composition.
* 'plain' or 'polaroid' are supported.
* - resize_height: (integer) The height that each individual thumbnail
* should be resized to before composing on the image.
* - padding: (integer) How much padding should we ensure is left around
* the active image area?
* - background: (string) The background canvas color - this is used as
* the color to set any padding to.
* - bordercolor: (string) If using type 'plain' this sets the color of
* the border that each individual thumbnail gets.
* - borderwidth: (integer) If using type 'plain' this sets the width of
* the border on each individual thumbnail.
* - offset: (integer) 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
);
/**
* Applies the effect.
*/
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(
$ops . ' -background ' . escapeshellarg($this->_params['background'])
. ' -mosaic -bordercolor ' . escapeshellarg($this->_params['background'])
. ' -border ' . (integer)$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 .= ' \( ' . $temp
. ' -geometry +'
. mt_rand(1, $this->_params['resize_height'])
. '+' . mt_rand(1, $this->_params['resize_height'])
. ' -thumbnail \'' . (integer)$this->_params['resize_height']
. 'x' . (integer)$this->_params['resize_height']
. '>\' -bordercolor Snow -border 1 -polaroid '
. $angle . ' \) ';
}
$this->_image->addPostSrcOperation(
'-background ' . escapeshellarg($this->_params['background']) . ' ' . $ops
. '-mosaic -bordercolor ' . escapeshellarg($this->_params['background'])
. ' -border ' . (integer)$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 .= '\( ' . $temp . ' -thumbnail \''
. (integer)$this->_params['resize_height']
. 'x' . (integer)$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 ' . $ops
. '-mosaic -trim +repage -bordercolor '
. escapeshellarg($this->_params['background'])
. ' -border ' . (integer)$this->_params['padding']);
}
break;
}
}
private function _roundBorder($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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