/**
* Uncompress this file contents and return the result.
* Obviously, if a multi-gigibyte file is read with no immediate destination,
* you'll probably run out of memory.
*
* @param Filestore\File|bool $dst The destination to write the uncompressed data to
* If not provided, just returns the data.
*
* @return mixed
*/
public function uncompress($dst = false) {
$zd = gzopen($this->_file->getLocalFilename(), "r");
if (!$zd) return false;
$contents = '';
while (!feof($zd)) {
$contents .= gzread($zd, 2048);
}
gzclose($zd);
if($dst){
$dst->putContents($contents);
}
else{
return $contents;
}
}
/**
* Resize this image and save the output as another File object.
*
* This is used on conjunction with getPreview* and getQuickPreview.
* QuickPreview creates the destination file in the correct directory
* and getPreview* methods request the actual resizing.
*
* @param Filestore\File $file The destination file
* @param int $width Width of the final image (in px)
* @param int $height Height of the final image (in px)
* @param string $mode Mode (part of the geometry)
*/
private function _resizeTo(Filestore\File $file, $width, $height, $mode){
if(!$this->isImage()){
// :/
return;
}
\Core\Utilities\Logger\write_debug('Resizing image ' . $this->getFilename('') . ' to ' . $width . 'x' . $height . $mode);
$m = $this->getMimetype();
// Make sure the directory of the destination file exists!
// By touching the file, Core will create all parent directories as necessary.
$file->putContents('');
if($m == 'image/gif' && exec('which convert 2>/dev/null')){
// The GIF resizer handles EVERYTHING :)
// Granted of course, that imagemagick's convert is available on the server.
$resize = escapeshellarg($mode . $width . 'x' . $height);
exec('convert ' . escapeshellarg($this->getFilename()) . ' -resize ' . $resize . ' ' . escapeshellarg($file->getFilename()));
\Core\Utilities\Logger\write_debug('Resizing complete (via convert)');
return;
}
// Traditional resizing logic.
switch ($m) {
case 'image/jpeg':
$thumbType = 'JPEG';
$thumbWidth = $width;
$thumbHeight = $height;
if($width <= 200 && $height <= 200 && function_exists('exif_thumbnail')){
// Try to write out from the thumbnail img instead of the full size.
// This is done to increase server performance.
// eg: resizing a 5MB JPEG can take upwards of 50-100ms,
// whereas the embedded thumbnail will take only 2-10ms.
// Not to mention professional JPEG management tools such as PS and Gimp
// produce marginally higher-quality thumbnails than GD will.
// (The resulting filesize is negligible.)
// Of course if the requested image is larger than a thumbnail size, (200x200 in this case),
// using the thumbnail is counter-productive!
$img = exif_thumbnail($this->getFilename(), $thumbWidth, $thumbHeight, $thumbType);
if($img){
\Core\Utilities\Logger\write_debug('JPEG has thumbnail data of ' . $thumbWidth . 'x' . $thumbHeight . '!');
$file->putContents($img);
$img = imagecreatefromjpeg($file->getFilename());
}
else{
$img = imagecreatefromjpeg($this->getFilename());
}
}
else{
$img = imagecreatefromjpeg($this->getFilename());
}
break;
case 'image/png':
$img = imagecreatefrompng($this->getFilename());
break;
case 'image/gif':
$img = imagecreatefromgif($this->getFilename());
break;
default:
// Hmmm...
\Core\Utilities\Logger\write_debug('Resizing complete (failed, not sure what it was)');
return;
}
if ($img) {
$sW = imagesx($img);
$sH = imagesy($img);
$nW = $sW;
$nH = $sH;
switch($mode){
// Standard mode, images are scaled down (only) while preserving aspect ratio
case '':
case '<':
if ($nW > $width) {
$nH = $width * $sH / $sW;
$nW = $width;
}
if ($nH > $height) {
$nW = $height * $sW / $sH;
$nH = $height;
}
break;
// Only resize up
case '>':
if ($nW < $width) {
$nH = $width * $sH / $sW;
$nW = $width;
}
if ($nH < $height) {
$nW = $height * $sW / $sH;
$nH = $height;
}
break;
// Resize to new size, regardless about aspect ratio
case '!':
$nW = $width;
$nH = $height;
break;
// Resize image based on smallest dimension
case '^':
$ratioheight = $sW / $height;
$ratiowidth = $sH / $width;
if($ratioheight > 1 && $ratiowidth > 1){
// The image is larger than any of the dimensions, I can use the reduction logic.
if(($width * $sH / $sW) > ($height * $sW / $sH)){
$nH = $width * $sH / $sW;
$nW = $width;
}
else{
$nH = $height;
$nW = $height * $sW / $sH;
}
}
elseif($ratiowidth > $ratioheight){
// The image needs to be increased in size, this logic is slightly different.
$nW = $width;
$nH = round($width * $sH / $sW);
}
else{
$nH = $height;
$nW = round($height * $sW / $sH);
}
}
// If it's a JPEG, try to find the original thumbnail.
/*if(false && $m == 'image/jpeg'){
$type = 'JPEG';
$img = exif_thumbnail($this->getFilename(), $nW, $nH, $type);
$file->putContents($img);
return;
}*/
$img2 = imagecreatetruecolor($nW, $nH);
imagealphablending($img2, false);
imagesavealpha($img2, true);
imagealphablending($img, true);
// Assign a transparency color.
//$trans = imagecolorallocatealpha($img2, 0, 0, 0, 0);
//imagefill($img2, 0, 0, $trans);
imagecopyresampled($img2, $img, 0, 0, 0, 0, $nW, $nH, $sW, $sH);
imagedestroy($img);
switch ($m) {
case 'image/jpeg':
imagejpeg($img2, $file->getFilename(), 60);
\Core\Utilities\Logger\write_debug('Resizing complete (via imagejpeg)');
break;
case 'image/png':
imagepng($img2, $file->getFilename(), 9);
\Core\Utilities\Logger\write_debug('Resizing complete (via imagepng)');
break;
case 'image/gif':
imagegif($img2, $file->getFilename());
\Core\Utilities\Logger\write_debug('Resizing complete (via imagegif)');
break;
default:
// Hmmm...
\Core\Utilities\Logger\write_debug('Resizing complete (failed, not sure what it was)');
return;
}
}
}
