/**
* Resize to fit fully within the given box, without resizing. Extra space left around
* the image will be padded with the background color.
* @param width
* @param height
* @param backgroundColour
*/
public function paddedResize($width, $height, $backgroundColor = "FFFFFF")
{
if (!$this->gd) {
return;
}
$width = round($width);
$height = round($height);
// Check that a resize is actually necessary.
if ($width == $this->width && $height == $this->height) {
return $this;
}
$newGD = imagecreatetruecolor($width, $height);
// Preserves transparency between images
imagealphablending($newGD, false);
imagesavealpha($newGD, true);
$bg = GD::color_web2gd($newGD, $backgroundColor);
imagefilledrectangle($newGD, 0, 0, $width, $height, $bg);
$destAR = $width / $height;
if ($this->width > 0 && $this->height > 0) {
// We can't divide by zero theres something wrong.
$srcAR = $this->width / $this->height;
// Destination narrower than the source
if ($destAR > $srcAR) {
$destY = 0;
$destHeight = $height;
$destWidth = round($height * $srcAR);
$destX = round(($width - $destWidth) / 2);
// Destination shorter than the source
} else {
$destX = 0;
$destWidth = $width;
$destHeight = round($width / $srcAR);
$destY = round(($height - $destHeight) / 2);
}
imagecopyresampled($newGD, $this->gd, $destX, $destY, 0, 0, $destWidth, $destHeight, $this->width, $this->height);
}
$output = clone $this;
$output->setImageResource($newGD);
return $output;
}