PSGraphics2DAdapter


1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    * 
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  /* $Id: PSGraphics2DAdapter.java 426576 2006-07-28 15:44:37Z jeremias $ */
19   
20  package org.apache.fop.render.ps;
21  
22  import java.awt.Dimension  ;
23  import java.awt.geom.AffineTransform  ;
24  import java.awt.geom.Rectangle2D  ;
25  import java.io.IOException  ;
26  
27  import org.apache.fop.render.Graphics2DAdapter;
28  import org.apache.fop.render.Graphics2DImagePainter;
29  import org.apache.fop.render.RendererContext;
30  import org.apache.xmlgraphics.java2d.ps.PSGraphics2D;
31  import org.apache.xmlgraphics.ps.PSGenerator;
32  
33  /**
34   * Graphics2DAdapter implementation for PostScript.
35   */
36  public class PSGraphics2DAdapter implements Graphics2DAdapter {
37  
38      private PSRenderer renderer;
39  
40      /**
41       * Main constructor
42       * @param renderer the Renderer instance to which this instance belongs
43       */
44      public PSGraphics2DAdapter(PSRenderer renderer) {
45          this.renderer = renderer;
46      }
47      
48      /** @see org.apache.fop.render.Graphics2DAdapter */
49      public void paintImage(Graphics2DImagePainter painter, 
50              RendererContext context,
51              int x, int y, int width, int height) throws IOException   {
52          PSGenerator gen = renderer.gen;
53          
54          float fwidth = width / 1000f;
55          float fheight = height / 1000f;
56          float fx = x / 1000f;
57          float fy = y / 1000f;
58          
59          // get the 'width' and 'height' attributes of the SVG document
60          Dimension   dim = painter.getImageSize();
61          float imw = (float)dim.getWidth() / 1000f;
62          float imh = (float)dim.getHeight() / 1000f;
63  
64          float sx = fwidth / (float)imw;
65          float sy = fheight / (float)imh;
66  
67          gen.commentln("%FOPBeginGraphics2D");
68          gen.saveGraphicsState();
69          // Clip to the image area.
70          gen.writeln("newpath");
71          gen.defineRect(fx, fy, fwidth, fheight);
72          gen.writeln("clip");
73          
74          // transform so that the coordinates (0,0) is from the top left
75          // and positive is down and to the right. (0,0) is where the
76          // viewBox puts it.
77          gen.concatMatrix(sx, 0, 0, sy, fx, fy);
78  
79          final boolean textAsShapes = false;
80          PSGraphics2D graphics = new PSGraphics2D(textAsShapes, gen);
81          graphics.setGraphicContext(new org.apache.xmlgraphics.java2d.GraphicContext());
82          AffineTransform   transform = new AffineTransform  ();
83          // scale to viewbox
84          transform.translate(fx, fy);
85          gen.getCurrentState().concatMatrix(transform);
86          Rectangle2D   area = new Rectangle2D.Double  (0.0, 0.0, imw, imh);
87          painter.paint(graphics, area);
88  
89          gen.restoreGraphicsState();
90          gen.commentln("%FOPEndGraphics2D");
91      }
92  
93  }
94
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