/**
* Calculates the Least Common Multiple of an array of integers.
*
* @param array $array
* @return integer
*/
function gcf_array($array)
{
if (!is_array($array)) {
throw new \InvalidArgumentException('lcm_array expects an array of integers.');
}
if (count($array) > 1) {
$array[] = gcf(array_shift($array), array_shift($array));
return gcf_array($array);
}
return $array[0];
}
/**
* Processes an image.
*
* @param \Imagick $inputImage
* @return \Imagick The processed image.
*/
public function processImage(\Imagick $inputImage)
{
$totalFrames = 0;
$uniqueFrameDelays = [];
// If the image isn't animated, we don't have to do anything.
if ($inputImage->getIteratorIndex() < 2) {
return $inputImage;
}
$imageCopy = $inputImage->coalesceImages();
// Count frames, and build a set of unique frame delay amounts.
/** @var \Imagick $item */
foreach ($imageCopy as $item) {
$totalFrames++;
$delay = $item->getImageDelay();
if (!isset($uniqueFrameDelays[$delay])) {
$uniqueFrameDelays[$delay] = 0;
}
$uniqueFrameDelays[$delay]++;
}
// If all the frames are the same length, we don't need to do anything.
if (1 === count($uniqueFrameDelays)) {
return $inputImage;
}
// To re-time the animation, we'll need to find the least common
// multiple of all the frame delays.
$frameDelays = array_keys($uniqueFrameDelays);
$newDelay = max(min($frameDelays), gcf_array($frameDelays));
$inputImage = $inputImage->coalesceImages();
$outputImage = new \Imagick();
var_dump(["Input delay", $inputImage->getImageDelay()]);
/** @var \Imagick $frame */
foreach ($inputImage as $frame) {
$outputFrame = clone $frame->getImage();
$frameCount = floor($outputFrame->getImageDelay() / $newDelay);
$outputFrame->setImageDelay($newDelay);
for ($i = 0; $i < $frameCount; $i++) {
$outputImage->addImage($outputFrame);
}
}
// $outputImage = $outputImage->deconstructImages();
$outputImage->setImageFormat('gif');
foreach ($outputImage as $frame) {
var_dump($frame->getImageDelay());
}
var_dump($inputImage->getImageLength());
var_dump($outputImage->getImageLength());
$outputImage->writeImages("output.gif", true);
return $outputImage;
}
