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1   /*
2    * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  
26  package sun.java2d.pipe;
27  
28  import java.awt.Rectangle;
29  import java.awt.Shape;
30  import java.awt.Font;
31  import java.awt.font.GlyphVector;
32  import sun.java2d.SunGraphics2D;
33  import sun.java2d.loops.FontInfo;
34  import sun.font.GlyphList;
35  
36  /*
37   * This class uses the alpha graybits arrays from a GlyphList object to
38   * drive a CompositePipe in much the same way as the antialiasing renderer.
39   */
40  public class TextRenderer extends GlyphListPipe {
41  
42      CompositePipe outpipe;
43  
44      public TextRenderer(CompositePipe pipe) {
45          outpipe = pipe;
46      }
47  
48      protected void drawGlyphList(SunGraphics2D sg2d, GlyphList gl) {
49          int num = gl.getNumGlyphs();
50          Region clipRegion = sg2d.getCompClip();
51          int cx1 = clipRegion.getLoX();
52          int cy1 = clipRegion.getLoY();
53          int cx2 = clipRegion.getHiX();
54          int cy2 = clipRegion.getHiY();
55          Object ctx = null;
56          try {
57              int[] bounds = gl.getBounds();
58              Rectangle r = new Rectangle(bounds[0], bounds[1],
59                                          bounds[2] - bounds[0],
60                                          bounds[3] - bounds[1]);
61              Shape s = sg2d.untransformShape(r);
62              ctx = outpipe.startSequence(sg2d, s, r, bounds);
63              for (int i = 0; i < num; i++) {
64                  gl.setGlyphIndex(i);
65                  int metrics[] = gl.getMetrics();
66                  int gx1 = metrics[0];
67                  int gy1 = metrics[1];
68                  int w = metrics[2];
69                  int gx2 = gx1 + w;
70                  int gy2 = gy1 + metrics[3];
71                  int off = 0;
72                  if (gx1 < cx1) {
73                      off = cx1 - gx1;
74                      gx1 = cx1;
75                  }
76                  if (gy1 < cy1) {
77                      off += (cy1 - gy1) * w;
78                      gy1 = cy1;
79                  }
80                  if (gx2 > cx2) gx2 = cx2;
81                  if (gy2 > cy2) gy2 = cy2;
82                  if (gx2 > gx1 && gy2 > gy1 &&
83                      outpipe.needTile(ctx, gx1, gy1, gx2 - gx1, gy2 - gy1))
84                  {
85                      byte alpha[] = gl.getGrayBits();
86                      outpipe.renderPathTile(ctx, alpha, off, w,
87                                             gx1, gy1, gx2 - gx1, gy2 - gy1);
88                  } else {
89                      outpipe.skipTile(ctx, gx1, gy1);
90                  }
91              }
92          } finally {
93              if (ctx != null) {
94                  outpipe.endSequence(ctx);
95              }
96          }
97      }
98  }