J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.java2d.pipe; |
| 27 | |
| 28 | import java.awt.font.FontRenderContext; |
| 29 | import java.awt.font.GlyphVector; |
| 30 | import java.awt.font.TextLayout; |
| 31 | import sun.java2d.SunGraphics2D; |
| 32 | import sun.font.GlyphList; |
| 33 | import sun.awt.SunHints; |
| 34 | |
| 35 | import java.awt.Shape; |
| 36 | import java.awt.geom.AffineTransform; |
| 37 | import java.awt.font.TextLayout; |
| 38 | |
| 39 | /** |
| 40 | * A delegate pipe of SG2D for drawing "large" text with |
| 41 | * a solid source colour to an opaque destination. |
| 42 | * The text is drawn as a filled outline. |
| 43 | * Since the developer is not explicitly requesting this way of |
| 44 | * rendering, this should not be used if the current paint is not |
| 45 | * a solid colour. |
| 46 | * |
| 47 | * If text anti-aliasing is requested by the application, and |
| 48 | * filling path, an anti-aliasing fill pipe needs to |
| 49 | * be invoked. |
| 50 | * This involves making some of the same decisions as in the |
| 51 | * validatePipe call, which may be in a SurfaceData subclass, so |
| 52 | * its awkward to always ensure that the correct pipe is used. |
| 53 | * The easiest thing, rather than reproducing much of that logic |
| 54 | * is to call validatePipe() which works but is expensive, although |
| 55 | * probably not compared to the cost of filling the path. |
| 56 | * Note if AA hint is ON but text-AA hint is OFF this logic will |
| 57 | * produce AA text which perhaps isn't what the user expected. |
| 58 | * Note that the glyphvector obeys its FRC, not the G2D. |
| 59 | */ |
| 60 | |
| 61 | public class OutlineTextRenderer implements TextPipe { |
| 62 | |
| 63 | // Text with a height greater than the threshhold will be |
| 64 | // drawn via this pipe. |
| 65 | public static final int THRESHHOLD = 100; |
| 66 | |
| 67 | public void drawChars(SunGraphics2D g2d, |
| 68 | char data[], int offset, int length, |
| 69 | int x, int y) { |
| 70 | |
| 71 | String s = new String(data, offset, length); |
| 72 | drawString(g2d, s, x, y); |
| 73 | } |
| 74 | |
| 75 | public void drawString(SunGraphics2D g2d, String str, double x, double y) { |
| 76 | |
| 77 | if ("".equals(str)) { |
| 78 | return; // TextLayout constructor throws IAE on "". |
| 79 | } |
| 80 | TextLayout tl = new TextLayout(str, g2d.getFont(), |
| 81 | g2d.getFontRenderContext()); |
| 82 | Shape s = tl.getOutline(AffineTransform.getTranslateInstance(x, y)); |
| 83 | |
| 84 | int textAAHint = g2d.getFontInfo().aaHint; |
| 85 | |
| 86 | int prevaaHint = - 1; |
| 87 | if (textAAHint != SunHints.INTVAL_TEXT_ANTIALIAS_OFF && |
| 88 | g2d.antialiasHint != SunHints.INTVAL_ANTIALIAS_ON) { |
| 89 | prevaaHint = g2d.antialiasHint; |
| 90 | g2d.antialiasHint = SunHints.INTVAL_ANTIALIAS_ON; |
| 91 | g2d.validatePipe(); |
| 92 | } else if (textAAHint == SunHints.INTVAL_TEXT_ANTIALIAS_OFF |
| 93 | && g2d.antialiasHint != SunHints.INTVAL_ANTIALIAS_OFF) { |
| 94 | prevaaHint = g2d.antialiasHint; |
| 95 | g2d.antialiasHint = SunHints.INTVAL_ANTIALIAS_OFF; |
| 96 | g2d.validatePipe(); |
| 97 | } |
| 98 | |
| 99 | g2d.fill(s); |
| 100 | |
| 101 | if (prevaaHint != -1) { |
| 102 | g2d.antialiasHint = prevaaHint; |
| 103 | g2d.validatePipe(); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | public void drawGlyphVector(SunGraphics2D g2d, GlyphVector gv, |
| 108 | float x, float y) { |
| 109 | |
| 110 | |
| 111 | Shape s = gv.getOutline(x, y); |
| 112 | int prevaaHint = - 1; |
| 113 | FontRenderContext frc = gv.getFontRenderContext(); |
| 114 | boolean aa = frc.isAntiAliased(); |
| 115 | |
| 116 | /* aa will be true if any AA mode has been specified. |
| 117 | * ie for LCD and 'gasp' modes too. |
| 118 | * We will check if 'gasp' has resolved AA to be "OFF", and |
| 119 | * in all other cases (ie AA ON and all LCD modes) use AA outlines. |
| 120 | */ |
| 121 | if (aa) { |
| 122 | if (g2d.getGVFontInfo(gv.getFont(), frc).aaHint == |
| 123 | SunHints.INTVAL_TEXT_ANTIALIAS_OFF) { |
| 124 | aa = false; |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | if (aa && g2d.antialiasHint != SunHints.INTVAL_ANTIALIAS_ON) { |
| 129 | prevaaHint = g2d.antialiasHint; |
| 130 | g2d.antialiasHint = SunHints.INTVAL_ANTIALIAS_ON; |
| 131 | g2d.validatePipe(); |
| 132 | } else if (!aa && g2d.antialiasHint != SunHints.INTVAL_ANTIALIAS_OFF) { |
| 133 | prevaaHint = g2d.antialiasHint; |
| 134 | g2d.antialiasHint = SunHints.INTVAL_ANTIALIAS_OFF; |
| 135 | g2d.validatePipe(); |
| 136 | } |
| 137 | |
| 138 | g2d.fill(s); |
| 139 | |
| 140 | if (prevaaHint != -1) { |
| 141 | g2d.antialiasHint = prevaaHint; |
| 142 | g2d.validatePipe(); |
| 143 | } |
| 144 | } |
| 145 | } |