/**
* @param \PHPThumb\GD $phpthumb
* @return \PHPThumb\GD
*/
public function execute($phpthumb)
{
$currentImage = $phpthumb->getOldImage();
$currentDimensions = $phpthumb->getCurrentDimensions();
$borderTop = 0;
$borderBottom = 0;
$borderLeft = 0;
$borderRight = 0;
if (in_array('T', $this->sides)) {
for (; $borderTop < $currentDimensions['height']; ++$borderTop) {
for ($x = 0; $x < $currentDimensions['width']; ++$x) {
if (imagecolorat($currentImage, $x, $borderTop) != $this->rgb2int($this->color)) {
break 2;
}
}
}
}
if (in_array('B', $this->sides)) {
for (; $borderBottom < $currentDimensions['height']; ++$borderBottom) {
for ($x = 0; $x < $currentDimensions['width']; ++$x) {
if (imagecolorat($currentImage, $x, $currentDimensions['height'] - $borderBottom - 1) != $this->rgb2int($this->color)) {
break 2;
}
}
}
}
if (in_array('L', $this->sides)) {
for (; $borderLeft < $currentDimensions['width']; ++$borderLeft) {
for ($y = 0; $y < $currentDimensions['height']; ++$y) {
if (imagecolorat($currentImage, $borderLeft, $y) != $this->rgb2int($this->color)) {
break 2;
}
}
}
}
if (in_array('R', $this->sides)) {
for (; $borderRight < $currentDimensions['width']; ++$borderRight) {
for ($y = 0; $y < $currentDimensions['height']; ++$y) {
if (imagecolorat($currentImage, $currentDimensions['width'] - $borderRight - 1, $y) != $this->rgb2int($this->color)) {
break 2;
}
}
}
}
$newWidth = $currentDimensions['width'] - ($borderLeft + $borderRight);
$newHeight = $currentDimensions['height'] - ($borderTop + $borderBottom);
$newImage = imagecreatetruecolor($newWidth, $newHeight);
imagecopy($newImage, $currentImage, 0, 0, $borderLeft, $borderTop, $currentDimensions['width'], $currentDimensions['height']);
$phpthumb->setOldImage($newImage);
$phpthumb->setCurrentDimensions(array('width' => $newWidth, 'height' => $newHeight));
return $phpthumb;
}
