Save PDFs and SVGs with content hash

Author: NicoHinderling

apple-catalog-parsing/native/swift/AssetCatalogParser/Sources/AssetCatalogParser/AssetCatalogReader.swift

@@ -223,8 +223,15 @@ enum AssetUtil {
                 // Get image dimensions from regular rendition
                 (width, height, unslicedImage) = resolveImageDimensions(rendition, isVector)
 
-                // Skip SVGs, but save images even if they don't have an extension (default to png)
-                if fileExtension != "svg", let unslicedImage = unslicedImage {
+                // Handle PDFs and SVGs by saving raw data
+                if fileExtension == "pdf" || fileExtension == "svg" {
+                    let fileURL = try! createResultsPath(assetURL: file, outputURL: outputURL)
+                        .appendingPathComponent(imageId)
+                        .appendingPathExtension(fileExtension)
+                    try! data.write(to: fileURL)
+                }
+                // Save images that can be converted to CGImage
+                else if let unslicedImage = unslicedImage {
                     let format = fileExtension.isEmpty ? "png" : fileExtension
                     images[imageId] = (cgImage: unslicedImage, format: format)
                 }