Experimental support for WebP and AVIF as a preview

Signed-off-by: JanisPlayer <[email protected]>

lib/private/legacy/OC_Image.php

@@ -54,6 +54,8 @@ class OC_Image implements \OCP\IImage {
 
 	// Default quality for jpeg images
 	protected const DEFAULT_JPEG_QUALITY = 80;
+	protected const DEFAULT_WEBP_QUALITY = 80;
+	protected const DEFAULT_AVIF_QUALITY = 80;
 
 	/** @var false|resource|\GdImage */
 	protected $resource = false; // tmp resource.
@@ -273,6 +275,12 @@ private function _output(?string $filePath = null, ?string $mimeType = null): bo
 				case 'image/jpeg':
 					$imageType = IMAGETYPE_JPEG;
 					break;
+				case 'image/webp':
+					$imageType = IMAGETYPE_WEBP;
+					break;
+				case 'image/avif':
+					$imageType = IMAGETYPE_AVIF;
+					break;
 				case 'image/png':
 					$imageType = IMAGETYPE_PNG;
 					break;
@@ -297,6 +305,16 @@ private function _output(?string $filePath = null, ?string $mimeType = null): bo
 				imageinterlace($this->resource, (PHP_VERSION_ID >= 80000 ? true : 1));
 				$retVal = imagejpeg($this->resource, $filePath, $this->getJpegQuality());
 				break;
+			case "image/webp":
+				/** @psalm-suppress InvalidScalarArgument */
+				imageinterlace($this->resource, (PHP_VERSION_ID >= 80100 ? true : 1));
+				$retVal = imagewebp($this->resource, $filePath, $this->getWebpQuality());
+				break;
+			case "image/avif":
+				/** @psalm-suppress InvalidScalarArgument */
+				imageinterlace($this->resource, (PHP_VERSION_ID >= 80100 ? true : 1));
+				$retVal = imageavif($this->resource, $filePath, $this->getAvifQuality(), 10);
+				break;
 			case IMAGETYPE_PNG:
 				$retVal = imagepng($this->resource, $filePath);
 				break;
@@ -360,9 +378,24 @@ public function dataMimeType(): ?string {
 			return null;
 		}
 
+		if ($this->mimeType !== 'image/gif') {
+		$preview_format = $this->config->getSystemValueString('preview_format', 'jpeg');
+
+			switch ($preview_format) { // Change the format to the correct one
+				case 'webp':
+					return 'image/webp';
+					break;
+				case 'avif':
+					return 'image/avif';
+					break;
+				default:
+			}
+		}
+
 		switch ($this->mimeType) {
 			case 'image/png':
 			case 'image/jpeg':
+			case 'image/webp':
 			case 'image/avif':
 				return 'image/jpeg';
 			case 'image/gif':
@@ -390,6 +423,16 @@ public function data(): ?string {
 				$quality = $this->getJpegQuality();
 				$res = imagejpeg($this->resource, null, $quality);
 				break;
+			case "image/webp":
+				/** @psalm-suppress InvalidScalarArgument */
+				imageinterlace($this->resource, (PHP_VERSION_ID >= 80100 ? true : 1));
+				$res = imagewebp($this->resource, null, $this->getWebpQuality());
+				break;
+			case "image/avif":
+				/** @psalm-suppress InvalidScalarArgument */
+				imageinterlace($this->resource, (PHP_VERSION_ID >= 80100 ? true : 1));
+				$res = imageavif($this->resource, null, $this->getAvifQuality(), 10);
+				break;
 			case "image/gif":
 				$res = imagegif($this->resource);
 				break;
@@ -423,6 +466,24 @@ protected function getJpegQuality(): int {
 		return min(100, max(10, (int) $quality));
 	}
 
+	protected function getWebpQuality(): int {
+		$quality = $this->config->getAppValue('preview', 'webp_quality', (string) self::DEFAULT_WEBP_QUALITY);
+		// TODO: remove when getAppValue is type safe
+		if ($quality === null) {
+			$quality = self::DEFAULT_WEBP_QUALITY;
+		}
+		return min(100, max(10, (int) $quality));
+	}
+
+	protected function getAvifQuality(): int {
+		$quality = $this->config->getAppValue('preview', 'avif_quality', (string) self::DEFAULT_AVIF_QUALITY);
+		// TODO: remove when getAppValue is type safe
+		if ($quality === null) {
+			$quality = self::DEFAULT_AVIF_QUALITY;
+		}
+		return min(100, max(10, (int) $quality));
+	}
+
 	/**
 	 * (I'm open for suggestions on better method name ;)
 	 * Get the orientation based on EXIF data.