From 4715d8d16c351a2c3e26e2657e6f42ad99c6d676 Mon Sep 17 00:00:00 2001
From: Karl Tauber <karl@jformdesigner.com>
Date: Mon, 17 Jul 2023 12:43:09 +0200
Subject: [PATCH] jsvg: use `RenderingHints.VALUE_STROKE_PURE` for correct line
 rendering

---
 .../formdev/flatlaf/extras/FlatSVGIcon.java    | 18 ++++++++++++------
 .../formdev/flatlaf/extras/FlatSVGUtils.java   |  4 +---
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGIcon.java b/flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGIcon.java
index c8ea11a2..ebc31143 100644
--- a/flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGIcon.java
+++ b/flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGIcon.java
@@ -574,12 +574,7 @@ public class FlatSVGIcon
 		Graphics2D g2 = new GraphicsFilter( (Graphics2D) g.create(), colorFilter, ColorFilter.getInstance(), grayFilter );
 
 		try {
-			// same hints as in FlatUIUtils.setRenderingHints()
-			g2.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON );
-			g2.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_NORMALIZE );
-
-			// enable better image scaling
-			g2.setRenderingHint( RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR );
+			setRenderingHints( g2 );
 
 			paintSvg( g2, x, y );
 		} finally {
@@ -652,6 +647,17 @@ public class FlatSVGIcon
 		return MultiResolutionImageSupport.create( 0, dimensions, producer );
 	}
 
+	static void setRenderingHints( Graphics2D g ) {
+		// enable anti-aliasing
+		g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON );
+
+		// disable coordinate normalization for correct line rendering
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+
+		// enable better image scaling
+		g.setRenderingHint( RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR );
+	}
+
 	static URL uri2url( URI uri ) {
 		try {
 			return uri.toURL();
diff --git a/flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGUtils.java b/flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGUtils.java
index 2c8d012e..bb546fa7 100644
--- a/flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGUtils.java
+++ b/flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGUtils.java
@@ -19,7 +19,6 @@ package com.formdev.flatlaf.extras;
 import java.awt.Dimension;
 import java.awt.Graphics2D;
 import java.awt.Image;
-import java.awt.RenderingHints;
 import java.awt.image.BufferedImage;
 import java.net.URL;
 import java.util.Arrays;
@@ -201,8 +200,7 @@ public class FlatSVGUtils
 
 		Graphics2D g = image.createGraphics();
 		try {
-			g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON );
-			g.setRenderingHint( RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR );
+			FlatSVGIcon.setRenderingHints( g );
 
 			FloatSize size = document.size();
 			double sx = width / size.width;