Fix feDropShadow SVG filter when IMGPROXY_SVG_FIX_UNSUPPORTED is true

processing_handler.go

@@ -383,6 +383,21 @@ func handleProcessing(reqID string, rw http.ResponseWriter, r *http.Request) {
 		))
 	}
 
+	// We're going to rasterize SVG. Since librsvg lacks the support of some SVG
+	// features, we're going to replace them to minimize rendering error
+	if originData.Type == imagetype.SVG && config.SvgFixUnsupported {
+		fixed, changed, svgErr := svg.FixUnsupported(originData)
+		checkErr(ctx, "svg_processing", svgErr)
+
+		if changed {
+			// Since we'll replace origin data, it's better to close it to return
+			// it's buffer to the pool
+			originData.Close()
+
+			originData = fixed
+		}
+	}
+
 	resultData, err := func() (*imagedata.ImageData, error) {
 		defer metrics.StartProcessingSegment(ctx)()
 		return processing.ProcessImage(ctx, originData, po)