From dd694ef6042fdf2d978a978d3750acac2c25557d Mon Sep 17 00:00:00 2001
From: Ian Brown <bigianb@gmail.com>
Date: Sun, 30 Sep 2018 18:30:49 -0700
Subject: j3d-core: Fix HiDPI issues on Windows

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
---
 src/javax/media/j3d/Canvas3D.java               | 14 ++++++++++++--
 src/javax/media/j3d/CanvasViewEventCatcher.java |  7 +++++--
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/src/javax/media/j3d/Canvas3D.java b/src/javax/media/j3d/Canvas3D.java
index 080bd18..8824191 100644
--- a/src/javax/media/j3d/Canvas3D.java
+++ b/src/javax/media/j3d/Canvas3D.java
@@ -32,12 +32,14 @@ import java.awt.Container;
 import java.awt.Dimension;
 import java.awt.Frame;
 import java.awt.Graphics;
+import java.awt.Graphics2D;
 import java.awt.GraphicsConfiguration;
 import java.awt.GraphicsDevice;
 import java.awt.GraphicsEnvironment;
 import java.awt.IllegalComponentStateException;
 import java.awt.Point;
 import java.awt.Window;
+import java.awt.geom.AffineTransform;
 import java.awt.image.BufferedImage;
 import java.util.ArrayList;
 import java.util.Hashtable;
@@ -820,6 +822,8 @@ ArrayList<Integer> textureIdResourceFreeList = new ArrayList<Integer>();
     // CanvasViewEventCatcher.
     Point newPosition = new Point();
     Dimension newSize = new Dimension();
+    double xscale = 1.0;
+    double yscale = 1.0;
 
 // Remember OGL context resources to free
 // before context is destroy.
@@ -1227,9 +1231,15 @@ ArrayList<TextureRetained> textureIDResourceTable = new ArrayList<TextureRetaine
 	if (!firstPaintCalled && added && validCanvas &&
 	    validGraphicsMode()) {
 
+        final Graphics2D g2d = (Graphics2D) g;
+        final AffineTransform t = g2d.getTransform();
+
 	    try {
-		newSize = getSize();
-		newPosition = getLocationOnScreen();
+	        Dimension scaledSize = getSize();
+	        xscale = t.getScaleX();
+	        yscale = t.getScaleY();
+	        newSize = new Dimension((int)(scaledSize.getWidth()*xscale), (int)(scaledSize.getHeight()*yscale));
+		    newPosition = getLocationOnScreen();
 	    } catch (IllegalComponentStateException e) {
 		return;
 	    }
diff --git a/src/javax/media/j3d/CanvasViewEventCatcher.java b/src/javax/media/j3d/CanvasViewEventCatcher.java
index aadbf5f..478a84c 100644
--- a/src/javax/media/j3d/CanvasViewEventCatcher.java
+++ b/src/javax/media/j3d/CanvasViewEventCatcher.java
@@ -26,6 +26,7 @@
 
 package javax.media.j3d;
 
+import java.awt.Dimension;
 import java.awt.IllegalComponentStateException;
 import java.awt.event.ComponentAdapter;
 import java.awt.event.ComponentEvent;
@@ -65,7 +66,8 @@ class CanvasViewEventCatcher extends ComponentAdapter {
 
 	    // see comment below
 	    try {
-		canvas.newSize = canvas.getSize();
+	    Dimension size = canvas.getSize();
+		canvas.newSize = new Dimension((int)(size.getWidth()*canvas.xscale), (int)(size.getHeight()*canvas.yscale));
 		canvas.newPosition = canvas.getLocationOnScreen();
 	    } catch (IllegalComponentStateException ex) {}
 
@@ -90,7 +92,8 @@ class CanvasViewEventCatcher extends ComponentAdapter {
 	// first, then canvas lock in removeComponentListener()
 
 	try {
-	    canvas.newSize = canvas.getSize();
+		Dimension size = canvas.getSize();
+		canvas.newSize = new Dimension((int)(size.getWidth()*canvas.xscale), (int)(size.getHeight()*canvas.yscale));
 	    canvas.newPosition = canvas.getLocationOnScreen();
 	} catch (IllegalComponentStateException ex) {}
 
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