/**
* Flips the image.
*
* Based on http://stackoverflow.com/a/10001884/1136593
* Thanks Jon Grant
*
* @param string $mode ('V' = vertical, 'H' = horizontal, 'HV' = both)
*
* @return ImageResource This image
*/
public function flip($mode)
{
$dim = $this->getDimensions();
$srcPoint = new Point();
$srcDim = clone $dim;
// Flip vertically
if (stripos($mode, 'V') !== false) {
$srcPoint->setY($dim->getHeight() - 1);
$srcDim->setHeight(-$dim->getHeight());
}
// Flip horizontally
if (stripos($mode, 'H') !== false) {
$srcPoint->setX($dim->getWidth() - 1);
$srcDim->setWidth(-$dim->getWidth());
}
$this->resample(new Point(), $srcPoint, $dim, $srcDim);
return $this;
}
/**
* Do the actual resize/crop/fit/border logic and return the image data.
*
* @param Transaction $transaction
*
* @return string
*/
protected function resize(Transaction $transaction)
{
$crop = $transaction->getAction() === Action::CROP;
$fit = $transaction->getAction() === Action::FIT;
$border = $transaction->getAction() === Action::BORDER;
try {
$img = ImageResource::createFromString($transaction->getSrcImage()->read());
} catch (Exception $e) {
return false;
}
$target = clone $transaction->getTarget();
$original = $img->getDimensions();
$point = new Point();
if ($crop) {
$xratio = $original->getWidth() / $target->getWidth();
$yratio = $original->getHeight() / $target->getHeight();
// calculate x or y coordinate and width or height of source
if ($xratio > $yratio) {
$point->setX(round(($original->getWidth() - $original->getWidth() / $xratio * $yratio) / 2));
$original->setWidth(round($original->getWidth() / $xratio * $yratio));
} elseif ($yratio > $xratio) {
$point->setY(round(($original->getHeight() - $original->getHeight() / $yratio * $xratio) / 2));
$original->setHeight(round($original->getHeight() / $yratio * $xratio));
}
} elseif (!$border && !$fit) {
$ratio = min($target->getWidth() / $original->getWidth(), $target->getHeight() / $original->getHeight());
$target->setWidth($original->getWidth() * $ratio);
$target->setHeight($original->getHeight() * $ratio);
}
$new = ImageResource::createNew($target, $img->getType());
if ($border) {
$new->fill($this->background);
$tmpheight = $original->getHeight() * ($target->getWidth() / $original->getWidth());
if ($tmpheight > $target->getHeight()) {
$target->setWidth($original->getWidth() * ($target->getHeight() / $original->getHeight()));
$point->setX(round(($transaction->getTarget()->getWidth() - $target->getWidth()) / 2));
} else {
$target->setHeight($tmpheight);
$point->setY(round(($transaction->getTarget()->getHeight() - $target->getHeight()) / 2));
}
}
if (!$crop && !$border) {
$img->resample(new Point(), new Point(), $target, $original, $new);
} elseif ($border) {
$img->resample($point, new Point(), $target, $original, $new);
} else {
$img->resample(new Point(), $point, $target, $original, $new);
}
return $img->toString();
}
