<?php
namespace Intervention\Image\Imagick\Commands;
use Intervention\Image\Commands\AbstractCommand;
use Intervention\Image\Imagick\Color;
class TrimCommand extends AbstractCommand
{
/**
* Trims away parts of an image
*
* @param \Intervention\Image\Image $image
* @return boolean
*/
public function execute($image)
{
$base = $this->argument(0)->type('string')->value();
$away = $this->argument(1)->value();
$tolerance = $this->argument(2)->type('numeric')->value(0);
$feather = $this->argument(3)->type('numeric')->value(0);
$width = $image->getWidth();
$height = $image->getHeight();
$checkTransparency = false;
// define borders to trim away
if (is_null($away)) {
$away = ['top', 'right', 'bottom', 'left'];
} elseif (is_string($away)) {
$away = [$away];
}
// lower border names
foreach ($away as $key => $value) {
$away[$key] = strtolower($value);
}
// define base color position
switch (strtolower($base)) {
case 'transparent':
case 'trans':
$checkTransparency = true;
$base_x = 0;
$base_y = 0;
break;
case 'bottom-right':
case 'right-bottom':
$base_x = $width - 1;
$base_y = $height - 1;
break;
default:
case 'top-left':
case 'left-top':
$base_x = 0;
$base_y = 0;
break;
}
// pick base color
if ($checkTransparency) {
$base_color = new Color; // color will only be used to compare alpha channel
} else {
$base_color = $image->pickColor($base_x, $base_y, 'object');
}
// trim on clone to get only coordinates
$trimed = clone $image->getCore();
// add border to trim specific color
$trimed->borderImage($base_color->getPixel(), 1, 1);
// trim image
$trimed->trimImage(65850 / 100 * $tolerance);
// get coordinates of trim
$imagePage = $trimed->getImagePage();
list($crop_x, $crop_y) = [$imagePage['x']-1, $imagePage['y']-1];
// $trimed->setImagePage(0, 0, 0, 0);
list($crop_width, $crop_height) = [$trimed->width, $trimed->height];
// adjust settings if right should not be trimed
if ( ! in_array('right', $away)) {
$crop_width = $crop_width + ($width - ($width - $crop_x));
}
// adjust settings if bottom should not be trimed
if ( ! in_array('bottom', $away)) {
$crop_height = $crop_height + ($height - ($height - $crop_y));
}
// adjust settings if left should not be trimed
if ( ! in_array('left', $away)) {
$crop_width = $crop_width + $crop_x;
$crop_x = 0;
}
// adjust settings if top should not be trimed
if ( ! in_array('top', $away)) {
$crop_height = $crop_height + $crop_y;
$crop_y = 0;
}
// add feather
$crop_width = min($width, ($crop_width + $feather * 2));
$crop_height = min($height, ($crop_height + $feather * 2));
$crop_x = max(0, ($crop_x - $feather));
$crop_y = max(0, ($crop_y - $feather));
// finally crop based on page
$image->getCore()->cropImage($crop_width, $crop_height, $crop_x, $crop_y);
$image->getCore()->setImagePage(0,0,0,0);
$trimed->destroy();
return true;
}
}