protected function decode($name)
{
$action = "split";
$animation = __DIR__ . "/gifs/{$name}.gif";
$checksumPath = __DIR__ . "/gifs/{$name}.{$action}.json";
$dir = __DIR__ . "/output/{$action}/{$name}";
$frameCount = 0;
$checksums = [];
$hasChecksums = $this->loadChecksums($checksumPath, $checksums);
$this->createDirOrClear($dir);
$stream = new MemoryStream();
$stream->loadFromFile($animation);
$decoder = new Decoder($stream);
$decoder->decode(function (Frame $frame, $index) use(&$checksums, $hasChecksums, &$frameCount, $name, $dir) {
$frameCount++;
$paddedIndex = str_pad($index, 3, '0', STR_PAD_LEFT);
$frame->getStream()->copyContentsToFile("{$dir}/frame{$paddedIndex}.gif");
$checksum = sha1($frame->getStream()->getContents());
if ($hasChecksums) {
$this->assertEquals($checksum, $checksums[$index]);
}
$checksums[$index] = $checksum;
});
file_put_contents("{$dir}/{$name}.{$action}.json", json_encode($checksums, JSON_PRETTY_PRINT));
}
protected function render($name)
{
$action = "render";
$animation = __DIR__ . "/gifs/{$name}.gif";
$checksumPath = __DIR__ . "/gifs/{$name}.{$action}.json";
$dir = __DIR__ . "/output/{$action}/{$name}";
$frameCount = 0;
$checksums = [];
$hasChecksums = $this->loadChecksums($checksumPath, $checksums);
$this->createDirOrClear($dir);
$stream = new MemoryStream();
$stream->loadFromFile($animation);
$decoder = new Decoder($stream);
$renderer = new Renderer($decoder);
$renderer->start(function ($gd, $index) use(&$checksums, $hasChecksums, &$frameCount, $name, $dir) {
$frameCount++;
$paddedIndex = str_pad($index, 3, '0', STR_PAD_LEFT);
$outputPath = "{$dir}/frame{$paddedIndex}.png";
imagepng($gd, $outputPath, 4, PNG_ALL_FILTERS);
$checksum = sha1(file_get_contents($outputPath));
if ($hasChecksums) {
$this->assertEquals($checksum, $checksums[$index]);
}
$checksums[$index] = $checksum;
});
file_put_contents("{$dir}/{$name}.{$action}.json", json_encode($checksums, JSON_PRETTY_PRINT));
}
use GIFEndec\Color;
use GIFEndec\Encoder;
use GIFEndec\MemoryStream;
use GIFEndec\Decoder;
use GIFEndec\Frame;
use GIFEndec\Renderer;
$urlData = $_GET['url'];
$uid = uniqid();
if (strpos($urlData, 'gif') === false) {
die("Not a gif file!");
}
$filenameIn = $urlData;
$filenameOut = __DIR__ . '/img/' . $uid . '.gif';
$contentOrFalse = file_get_contents($filenameIn);
$bytesOrFalse = file_put_contents($filenameOut, $contentOrFalse);
$gifStream = new MemoryStream();
$gifStream->loadFromFile($filenameOut);
$gifDecoder = new Decoder($gifStream);
$gif = new Encoder();
$framearr = array();
$gifDecoder->decode(function (Frame $frame, $index) {
global $framearr;
$framearr[] = $frame;
});
foreach (array_reverse($framearr) as $frame) {
$gif->addFrame($frame);
}
$gif->addFooter();
$gif->getStream()->copyContentsToFile(__DIR__ . '/out/' . $uid . '.gif');
$returner = './out/' . $uid . '.gif';
$fp = fopen($returner, 'rb');