Changeset 19641 in josm for trunk/src

Timestamp:

2026-10-06T11:40:41+02:00 (2 weeks ago)

Author:

gaben

Message:

fix #18131 - antialias clipped SVG images (e.g. the JOSM logo)

File:

• trunk/src/org/openstreetmap/josm/tools/ImageProvider.java (modified) (2 diffs)

trunk/src/org/openstreetmap/josm/tools/ImageProvider.java

@@ -83 +83 @@
 import com.github.weisj.jsvg.parser.LoaderContext;
 import com.github.weisj.jsvg.parser.SVGLoader;
+import com.github.weisj.jsvg.renderer.SVGRenderingHints;
 
 /**
@@ -1478 +1479 @@
         }
         return resizeMode.createBufferedImage(dim, new Dimension((int) sourceWidth, (int) sourceHeight), g -> {
+            // jsvg clips through Graphics2D#clip by default, which is not antialiased (jagged edges, see #18131).
+            // Soft clipping avoids that, but needs accurate mask/clip rendering, otherwise the clip is applied as a
+            // paint that the clipped elements' own paints override and parts of the image go missing.
+            g.setRenderingHint(SVGRenderingHints.KEY_SOFT_CLIPPING, SVGRenderingHints.VALUE_SOFT_CLIPPING_ON);
+            g.setRenderingHint(SVGRenderingHints.KEY_MASK_CLIP_RENDERING, SVGRenderingHints.VALUE_MASK_CLIP_RENDERING_ACCURACY);
             svg.render(null, g);
         }, null);