/**
* Resizes, crops, fixes orientation and stores in the cache
*
* @param int $fileId fileId of the original image
*/
private function resizeAndStore($fileId)
{
// Resize and store
$this->resizeAndCrop();
// We save a copy in the cache to speed up future calls
$cachePath = $this->buildCachePath($fileId);
$this->userView->file_put_contents($cachePath, $this->preview->data());
}
/**
* Saves a preview in the cache to speed up future calls
*
* Do not nullify the preview as it might send the whole process in a loop
*
* @param int $fileId fileId of the original image
* @param int $previewWidth
* @param int $previewHeight
*/
private function storePreview($fileId, $previewWidth, $previewHeight)
{
if (empty($previewWidth) || empty($previewHeight)) {
\OCP\Util::writeLog('core', 'Cannot save preview of dimension ' . $previewWidth . 'x' . $previewHeight, \OCP\Util::DEBUG);
} else {
$cachePath = $this->buildCachePath($fileId, $previewWidth, $previewHeight);
$this->userView->file_put_contents($cachePath, $this->preview->data());
}
}
/**
* Tests if a max size preview of smaller dimensions can be created
*
* @param \OCP\IImage $preview
*/
private function doesPreviewFit($preview)
{
$maxDimRatio = round($this->maxWidth / $this->maxHeight, 2);
$previewRatio = round($preview->width() / $preview->height(), 2);
// Testing code
/*print_r("mw $this->maxWidth ");
print_r("mh $this->maxHeight ");
print_r("mr $maxDimRatio ");
$pw = $preview->width();
$ph = $preview->height();
print_r("pw $pw ");
print_r("ph $ph ");
print_r("pr $previewRatio ");*/
if ($maxDimRatio < $previewRatio) {
$this->assertLessThanOrEqual($this->maxWidth, $preview->width());
$this->assertLessThan($this->maxHeight, $preview->height());
} elseif ($maxDimRatio > $previewRatio) {
$this->assertLessThan($this->maxWidth, $preview->width());
$this->assertLessThanOrEqual($this->maxHeight, $preview->height());
} else {
// Original had to be resized
$this->assertLessThanOrEqual($this->maxWidth, $preview->width());
$this->assertLessThanOrEqual($this->maxHeight, $preview->height());
}
}
/**
* Mixes a transparent background with a resized foreground preview
*
* @param \OCP\IImage $previewData
* @param int $previewWidth
* @param int $previewHeight
* @param int $newWidth
* @param int $newHeight
* @param int $maxWidth
* @param int $maxHeight
* @param int $newX
* @param int $newY
*
* @return resource
*/
private function processPreview($previewData, $previewWidth, $previewHeight, $newWidth, $newHeight, $maxWidth, $maxHeight, $newX, $newY)
{
$fixedPreview = imagecreatetruecolor($maxWidth, $maxHeight);
// Creates the canvas
// We make the background transparent
imagealphablending($fixedPreview, false);
$transparency = imagecolorallocatealpha($fixedPreview, 0, 0, 0, 127);
imagefill($fixedPreview, 0, 0, $transparency);
imagesavealpha($fixedPreview, true);
imagecopyresampled($fixedPreview, $previewData->resource(), $newX, $newY, 0, 0, $newWidth, $newHeight, $previewWidth, $previewHeight);
return $fixedPreview;
}
