fix for fill="transparent" and images for Salamander renderer

Signed-off-by: Stefan Niederhauser <[email protected]>

Author: nidi3

graphviz-java/src/main/java/guru/nidi/graphviz/engine/BatikRasterizer.java

@@ -30,7 +30,7 @@ class BatikRasterizer extends SvgRasterizer {
     @Override
     public BufferedImage doRasterize(Graphviz graphviz, @Nullable Consumer<Graphics2D> graphicsConfigurer, String svg) {
         final BufferedImage[] image = new BufferedImage[1];
-        final TranscoderInput in = new TranscoderInput(new StringReader(svg.replace("fill=\"transparent\"", "fill-opacity=\"0\"")));
+        final TranscoderInput in = new TranscoderInput(new StringReader(svg));
         try {
             final TranscoderOutput out = new TranscoderOutput(new OutputStream() {
                 @Override

graphviz-java/src/main/java/guru/nidi/graphviz/engine/SvgRasterizer.java

@@ -28,7 +28,10 @@ public Format format() {
 
     @Override
     public BufferedImage rasterize(Graphviz graphviz, @Nullable Consumer<Graphics2D> graphicsConfigurer, String input) {
-        final String svg = input.replace("stroke=\"transparent\"", "stroke=\"#fff\" stroke-opacity=\"0.0\"");
+        final String svg = input
+                .replace("xlink:href=\"", "xlink:href=\"file://")
+                .replace("stroke=\"transparent\"", "stroke=\"#fff\" stroke-opacity=\"0.0\"")
+                .replace("fill=\"transparent\"", "fill=\"#fff\" fill-opacity=\"0.0\"");
         return doRasterize(graphviz, graphicsConfigurer, svg);
     }