public function getFileThumbnail($width, $height, $crop)
{
if (!$this->fileRecord instanceof File) {
throw new ServerException('No File object attached to this ImageFile object.');
}
if ($width === null) {
$width = common_config('thumbnail', 'width');
$height = common_config('thumbnail', 'height');
$crop = common_config('thumbnail', 'crop');
}
if ($height === null) {
$height = $width;
$crop = true;
}
// Get proper aspect ratio width and height before lookup
// We have to do it through an ImageFile object because of orientation etc.
// Only other solution would've been to rotate + rewrite uploaded files
// which we don't want to do because we like original, untouched data!
list($width, $height, $x, $y, $w, $h) = $this->scaleToFit($width, $height, $crop);
$thumb = File_thumbnail::pkeyGet(array('file_id' => $this->fileRecord->id, 'width' => $width, 'height' => $height));
if ($thumb instanceof File_thumbnail) {
return $thumb;
}
$filename = $this->fileRecord->filehash ?: $this->filename;
// Remote files don't have $this->filehash
$extension = File::guessMimeExtension($this->mimetype);
$outname = "thumb-{$this->fileRecord->id}-{$width}x{$height}-{$filename}." . $extension;
$outpath = File_thumbnail::path($outname);
// The boundary box for our resizing
$box = array('width' => $width, 'height' => $height, 'x' => $x, 'y' => $y, 'w' => $w, 'h' => $h);
// Doublecheck that parameters are sane and integers.
if ($box['width'] < 1 || $box['width'] > common_config('thumbnail', 'maxsize') || $box['height'] < 1 || $box['height'] > common_config('thumbnail', 'maxsize') || $box['w'] < 1 || $box['x'] >= $this->width || $box['h'] < 1 || $box['y'] >= $this->height) {
// Fail on bad width parameter. If this occurs, it's due to algorithm in ImageFile->scaleToFit
common_debug("Boundary box parameters for resize of {$this->filepath} : " . var_export($box, true));
throw new ServerException('Bad thumbnail size parameters.');
}
common_debug(sprintf('Generating a thumbnail of File id==%u of size %ux%u', $this->fileRecord->id, $width, $height));
// Perform resize and store into file
$this->resizeTo($outpath, $box);
// Avoid deleting the original
if ($this->getPath() != File_thumbnail::path($this->filename)) {
$this->unlink();
}
return File_thumbnail::saveThumbnail($this->fileRecord->id, File_thumbnail::url($outname), $width, $height, $outname);
}
