1 files changed, 120 insertions, 0 deletions
diff --git a/src/main/java/com/kitfox/svg/pattern/PatternPaintContext.java b/src/main/java/com/kitfox/svg/pattern/PatternPaintContext.java
new file mode 100644
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--- /dev/null
+++ b/src/main/java/com/kitfox/svg/pattern/PatternPaintContext.java
@@ -0,0 +1,120 @@
+/*
+ * PatternPaintContext.java
+ *
+ *
+ *  The Salamander Project - 2D and 3D graphics libraries in Java
+ *  Copyright (C) 2004 Mark McKay
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *  Mark McKay can be contacted at mark@kitfox.com.  Salamander and other
+ *  projects can be found at http://www.kitfox.com
+ *
+ * Created on April 1, 2004, 3:37 AM
+ */
+
+package com.kitfox.svg.pattern;
+
+import java.awt.*;
+import java.awt.geom.*;
+import java.awt.image.*;
+
+/**
+ * @author Mark McKay
+ * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
+ */
+public class PatternPaintContext implements PaintContext
+{
+    BufferedImage source;  //Image we're rendering from
+    Rectangle deviceBounds;  //int size of rectangle we're rendering to
+//    AffineTransform userXform;  //xform from user space to device space
+//    AffineTransform distortXform;  //distortion applied to this pattern
+
+    AffineTransform xform;  //distortion applied to this pattern
+
+    int sourceWidth;
+    int sourceHeight;
+
+    //Raster we use to build tile
+    BufferedImage buf;
+
+    /** Creates a new instance of PatternPaintContext */
+    public PatternPaintContext(BufferedImage source, Rectangle deviceBounds, AffineTransform userXform, AffineTransform distortXform)
+    {
+//System.err.println("Bounds " + deviceBounds);
+        this.source = source;
+        this.deviceBounds = deviceBounds;
+        try {
+//            this.distortXform = distortXform.createInverse();
+//            this.userXform = userXform.createInverse();
+
+//            xform = userXform.createInverse();
+//            xform.concatenate(distortXform.createInverse());
+            xform = distortXform.createInverse();
+            xform.concatenate(userXform.createInverse());
+        }
+        catch (Exception e) { e.printStackTrace(); }
+
+        sourceWidth = source.getWidth();
+        sourceHeight = source.getHeight();
+    }
+
+    public void dispose() {
+    }
+
+    public ColorModel getColorModel() {
+        return source.getColorModel();
+    }
+
+    public Raster getRaster(int x, int y, int w, int h)
+    {
+//System.err.println("" + x + ", " + y + ", " + w + ", " + h);
+        if (buf == null || buf.getWidth() != w || buf.getHeight() != buf.getHeight())
+        {
+            buf = new BufferedImage(w, h, source.getType());
+        }
+
+//        Point2D.Float srcPt = new Point2D.Float(), srcPt2 = new Point2D.Float(), destPt = new Point2D.Float();
+        Point2D.Float srcPt = new Point2D.Float(), destPt = new Point2D.Float();
+        for (int j = 0; j < h; j++)
+        {
+            for (int i = 0; i < w; i++)
+            {
+                destPt.setLocation(i + x, j + y);
+
+                xform.transform(destPt, srcPt);
+
+//                userXform.transform(destPt, srcPt2);
+//                distortXform.transform(srcPt2, srcPt);
+
+                int ii = ((int)srcPt.x) % sourceWidth;
+                if (ii < 0) ii += sourceWidth;
+                int jj = ((int)srcPt.y) % sourceHeight;
+                if (jj < 0) jj += sourceHeight;
+
+                buf.setRGB(i, j, source.getRGB(ii, jj));
+            }
+        }
+
+        return buf.getData();
+    }
+
+    public static void main(String[] argv)
+    {
+        int i = -4;
+        System.err.println("Hello " + (i % 4));
+    }
+
+}