Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.scenegraph / src / org / simantics / scenegraph / utils / BufferedImage.java

diff --git a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/BufferedImage.java b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/BufferedImage.java
new file mode 100644 (file)
index 0000000..15ee2a0
--- /dev/null
+++ b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/BufferedImage.java
@@ -0,0 +1,127 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.scenegraph.utils;\r
+\r
+import java.awt.Color;\r
+import java.awt.Graphics2D;\r
+import java.awt.Point;\r
+import java.awt.RenderingHints;\r
+import java.awt.geom.AffineTransform;\r
+import java.awt.geom.Rectangle2D;\r
+\r
+import com.kitfox.svg.SVGDiagram;\r
+import com.kitfox.svg.SVGException;\r
+\r
+/**\r
+ * @author J-P Laine\r
+ */\r
+public class BufferedImage  {\r
+    SVGDiagram                 source;\r
+    Rectangle2D                imageBounds;\r
+    Point                      referenceSize;\r
+\r
+    java.awt.image.BufferedImage   buffer = null;\r
+    AffineTransform previousTransform = null;\r
+\r
+    /**\r
+     * @param original\r
+     * @param imageBounds\r
+     * @param referenceSize a reference size for the rasterized images or\r
+     *        <code>null</code> to not specify one in which case a default\r
+     *        resolution is used\r
+     */\r
+    public BufferedImage(SVGDiagram original, Rectangle2D imageBounds, Point referenceSize) {\r
+        this.source = original;\r
+        this.imageBounds = imageBounds;\r
+        this.referenceSize = referenceSize;\r
+    }\r
+\r
+    public BufferedImage(SVGDiagram original) {\r
+        this.source = original;\r
+        this.imageBounds = original.getViewRect();\r
+        this.referenceSize = null;\r
+    }\r
+\r
+    public java.awt.image.BufferedImage getBuffer() {\r
+       return buffer;\r
+    }\r
+    \r
+    @Override\r
+    public void finalize() throws Throwable {\r
+        //System.out.println("BufferedImage.finalize()");\r
+        releaseRaster();\r
+        super.finalize();\r
+    }\r
+\r
+    public synchronized void releaseRaster() {\r
+        source = null;\r
+        if (buffer != null) {\r
+            buffer.flush();\r
+            buffer = null;\r
+        }\r
+    }\r
+\r
+    public void paintToBuffer(AffineTransform transform, float margin) throws SVGException {\r
+\r
+        int w = (int)((imageBounds.getWidth()+margin*2) * transform.getScaleX());\r
+        int h = (int)((imageBounds.getHeight()+margin*2) * transform.getScaleY());\r
+        if(w < 1) w = 1;\r
+        if(h < 1) h = 1; // FIXME\r
+       \r
+        buffer = new java.awt.image.BufferedImage(w, h, java.awt.image.BufferedImage.TYPE_INT_ARGB);\r
+       \r
+       Graphics2D b2g = (Graphics2D)buffer.getGraphics();\r
+\r
+        b2g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_SPEED);\r
+        b2g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);\r
+        b2g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);\r
+\r
+        b2g.setBackground(Color.WHITE);\r
+        b2g.clearRect(0, 0, w, h);\r
+        b2g.translate(margin, margin);\r
+        b2g.scale(transform.getScaleX(), transform.getScaleY());\r
+        b2g.translate(-imageBounds.getMinX(), -imageBounds.getMinY());\r
+        source.render(b2g);\r
+\r
+    }\r
+    \r
+    public void paint(Graphics2D g) {\r
+        float margin = 5;\r
+\r
+        if(previousTransform == null || previousTransform.getScaleX() != g.getTransform().getScaleX() || previousTransform.getScaleY() != g.getTransform().getScaleY()) {\r
+//             setupSourceRender(g);\r
+            try {\r
+                previousTransform = (AffineTransform)g.getTransform().clone();\r
+               paintToBuffer(previousTransform, margin);\r
+            } catch (SVGException e) {\r
+                // TODO Auto-generated catch block\r
+                e.printStackTrace();\r
+            }\r
+        }\r
+\r
+        g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_SPEED);\r
+        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);\r
+        g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);\r
+        g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR);\r
+\r
+        AffineTransform at = (AffineTransform)g.getTransform().clone();\r
+        try {\r
+            g.translate(imageBounds.getMinX(), imageBounds.getMinY());\r
+            g.scale(1/previousTransform.getScaleX(), 1/previousTransform.getScaleY());\r
+            g.translate(-margin, -margin);\r
+\r
+            g.drawImage(buffer, 0, 0, null);\r
+        } finally {\r
+            g.setTransform(at);\r
+        }\r
+    }\r
+}\r