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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2005, 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.font; | ||
| 27 | |||
| 28 | import java.awt.Font; | ||
| 29 | import java.awt.font.FontRenderContext; | ||
| 30 | import java.awt.geom.AffineTransform; | ||
| 31 | import static sun.awt.SunHints.*; | ||
| 32 | |||
| 33 | /* | ||
| 34 | * This class encapsulates every thing needed that distinguishes a strike. | ||
| 35 | * It can be used as a key to locate a FontStrike in a Hashmap/cache. | ||
| 36 | * It is not mutatable, but contains mutatable AffineTransform objects, | ||
| 37 | * which for performance reasons it does not keep private copies of. | ||
| 38 | * Therefore code constructing these must pass in transforms it guarantees | ||
| 39 | * not to mutate. | ||
| 40 | */ | ||
| 41 | public class FontStrikeDesc { | ||
| 42 | |||
| 43 | /* Values to use as a mask that is used for faster comparison of | ||
| 44 | * two strikes using just an int equality test. | ||
| 45 | * The ones we don't use are listed here but commented out. | ||
| 46 | * ie style is already built and hint "OFF" values are zero. | ||
| 47 | * Note that this is used as a strike key and the same strike is used | ||
| 48 | * for HRGB and HBGR, so only the orientation needed (H or V) is needed | ||
| 49 | * to construct and distinguish a FontStrikeDesc. The rgb ordering | ||
| 50 | * needed for rendering is stored in the graphics state. | ||
| 51 | */ | ||
| 52 | // static final int STYLE_PLAIN = Font.PLAIN; // 0x0000 | ||
| 53 | // static final int STYLE_BOLD = Font.BOLD; // 0x0001 | ||
| 54 | // static final int STYLE_ITALIC = Font.ITALIC; // 0x0002 | ||
| 55 | // static final int STYLE_BOLDITALIC = Font.BOLD|Font.ITALIC; // 0x0003 | ||
| 56 | // static final int AA_OFF = 0x0000; | ||
| 57 | static final int AA_ON = 0x0010; | ||
| 58 | static final int AA_LCD_H = 0x0020; | ||
| 59 | static final int AA_LCD_V = 0x0040; | ||
| 60 | // static final int FRAC_METRICS_OFF = 0x0000; | ||
| 61 | static final int FRAC_METRICS_ON = 0x0100; | ||
| 62 | static final int FRAC_METRICS_SP = 0x0200; | ||
| 63 | |||
| 64 | /* devTx is to get an inverse transform to get user space values | ||
| 65 | * for metrics. Its not used otherwise, as the glyphTx is the important | ||
| 66 | * one. But it does mean that a strike representing a 6pt font and identity | ||
| 67 | * graphics transform is not equal to one for a 12 pt font and 2x scaled | ||
| 68 | * graphics transform. Its likely to be very rare that this causes | ||
| 69 | * duplication. | ||
| 70 | */ | ||
| 71 | AffineTransform devTx; | ||
| 72 | AffineTransform glyphTx; // all of ptSize, Font tx and Graphics tx. | ||
| 73 | int style; | ||
| 74 | int aaHint; | ||
| 75 | int fmHint; | ||
| 76 | private int hashCode; | ||
| 77 | private int valuemask; | ||
| 78 | |||
| 79 | public int hashCode() { | ||
| 80 | /* Can cache hashcode since a strike(desc) is immutable.*/ | ||
| 81 | if (hashCode == 0) { | ||
| 82 | hashCode = glyphTx.hashCode() + devTx.hashCode() + valuemask; | ||
| 83 | } | ||
| 84 | return hashCode; | ||
| 85 | } | ||
| 86 | |||
| 87 | public boolean equals(Object obj) { | ||
| 88 | try { | ||
| 89 | FontStrikeDesc desc = (FontStrikeDesc)obj; | ||
| 90 | return (desc.valuemask == this.valuemask && | ||
| 91 | desc.glyphTx.equals(this.glyphTx) && | ||
| 92 | desc.devTx.equals(this.devTx)); | ||
| 93 | } catch (Exception e) { | ||
| 94 | /* class cast or NP exceptions should not happen often, if ever, | ||
| 95 | * and I am hoping that this is faster than an instanceof check. | ||
| 96 | */ | ||
| 97 | return false; | ||
| 98 | } | ||
| 99 | } | ||
| 100 | |||
| 101 | FontStrikeDesc() { | ||
| 102 | // used with init | ||
| 103 | } | ||
| 104 | |||
| 105 | |||
| 106 | /* This maps a public text AA hint value into one of the subset of values | ||
| 107 | * used to index strikes. For the purpose of the strike cache there are | ||
| 108 | * only 4 values : OFF, ON, LCD_HRGB, LCD_VRGB. | ||
| 109 | * Font and ptSize are needed to resolve the 'gasp' table. The ptSize | ||
| 110 | * must therefore include device and font transforms. | ||
| 111 | */ | ||
| 112 | public static int getAAHintIntVal(Object aa, Font2D font2D, int ptSize) { | ||
| 113 | if (aa == VALUE_TEXT_ANTIALIAS_OFF || | ||
| 114 | aa == VALUE_TEXT_ANTIALIAS_DEFAULT) { | ||
| 115 | return INTVAL_TEXT_ANTIALIAS_OFF; | ||
| 116 | } else if (aa == VALUE_TEXT_ANTIALIAS_ON) { | ||
| 117 | return INTVAL_TEXT_ANTIALIAS_ON; | ||
| 118 | } else if (aa == VALUE_TEXT_ANTIALIAS_GASP) { | ||
| 119 | if (font2D.useAAForPtSize(ptSize)) { | ||
| 120 | return INTVAL_TEXT_ANTIALIAS_ON; | ||
| 121 | } else { | ||
| 122 | return INTVAL_TEXT_ANTIALIAS_OFF; | ||
| 123 | } | ||
| 124 | } else if (aa == VALUE_TEXT_ANTIALIAS_LCD_HRGB || | ||
| 125 | aa == VALUE_TEXT_ANTIALIAS_LCD_HBGR) { | ||
| 126 | return INTVAL_TEXT_ANTIALIAS_LCD_HRGB; | ||
| 127 | } else if (aa == VALUE_TEXT_ANTIALIAS_LCD_VRGB || | ||
| 128 | aa == VALUE_TEXT_ANTIALIAS_LCD_VBGR) { | ||
| 129 | return INTVAL_TEXT_ANTIALIAS_LCD_VRGB; | ||
| 130 | } else { | ||
| 131 | return INTVAL_TEXT_ANTIALIAS_OFF; | ||
| 132 | } | ||
| 133 | } | ||
| 134 | |||
| 135 | /* This maps a public text AA hint value into one of the subset of values | ||
| 136 | * used to index strikes. For the purpose of the strike cache there are | ||
| 137 | * only 4 values : OFF, ON, LCD_HRGB, LCD_VRGB. | ||
| 138 | * Font and FontRenderContext are needed to resolve the 'gasp' table. | ||
| 139 | * This is similar to the method above, but used by callers which have not | ||
| 140 | * already calculated the glyph device point size. | ||
| 141 | */ | ||
| 142 | public static int getAAHintIntVal(Font2D font2D, Font font, | ||
| 143 | FontRenderContext frc) { | ||
| 144 | Object aa = frc.getAntiAliasingHint(); | ||
| 145 | if (aa == VALUE_TEXT_ANTIALIAS_OFF || | ||
| 146 | aa == VALUE_TEXT_ANTIALIAS_DEFAULT) { | ||
| 147 | return INTVAL_TEXT_ANTIALIAS_OFF; | ||
| 148 | } else if (aa == VALUE_TEXT_ANTIALIAS_ON) { | ||
| 149 | return INTVAL_TEXT_ANTIALIAS_ON; | ||
| 150 | } else if (aa == VALUE_TEXT_ANTIALIAS_GASP) { | ||
| 151 | /* FRC.isIdentity() would have been useful */ | ||
| 152 | int ptSize; | ||
| 153 | AffineTransform tx = frc.getTransform(); | ||
| 154 | if (tx.isIdentity() && !font.isTransformed()) { | ||
| 155 | ptSize = font.getSize(); | ||
| 156 | } else { | ||
| 157 | /* one or both transforms is not identity */ | ||
| 158 | float size = font.getSize2D(); | ||
| 159 | if (tx.isIdentity()) { | ||
| 160 | tx = font.getTransform(); | ||
| 161 | tx.scale(size, size); | ||
| 162 | } else { | ||
| 163 | tx.scale(size, size); | ||
| 164 | if (font.isTransformed()) { | ||
| 165 | tx.concatenate(font.getTransform()); | ||
| 166 | } | ||
| 167 | } | ||
| 168 | double shearx = tx.getShearX(); | ||
| 169 | double scaley = tx.getScaleY(); | ||
| 170 | if (shearx != 0) { | ||
| 171 | scaley = Math.sqrt(shearx * shearx + scaley * scaley); | ||
| 172 | } | ||
| 173 | ptSize = (int)(Math.abs(scaley)+0.5); | ||
| 174 | } | ||
| 175 | if (font2D.useAAForPtSize(ptSize)) { | ||
| 176 | return INTVAL_TEXT_ANTIALIAS_ON; | ||
| 177 | } else { | ||
| 178 | return INTVAL_TEXT_ANTIALIAS_OFF; | ||
| 179 | } | ||
| 180 | } else if (aa == VALUE_TEXT_ANTIALIAS_LCD_HRGB || | ||
| 181 | aa == VALUE_TEXT_ANTIALIAS_LCD_HBGR) { | ||
| 182 | return INTVAL_TEXT_ANTIALIAS_LCD_HRGB; | ||
| 183 | } else if (aa == VALUE_TEXT_ANTIALIAS_LCD_VRGB || | ||
| 184 | aa == VALUE_TEXT_ANTIALIAS_LCD_VBGR) { | ||
| 185 | return INTVAL_TEXT_ANTIALIAS_LCD_VRGB; | ||
| 186 | } else { | ||
| 187 | return INTVAL_TEXT_ANTIALIAS_OFF; | ||
| 188 | } | ||
| 189 | } | ||
| 190 | |||
| 191 | public static int getFMHintIntVal(Object fm) { | ||
| 192 | if (fm == VALUE_FRACTIONALMETRICS_OFF || | ||
| 193 | fm == VALUE_FRACTIONALMETRICS_DEFAULT) { | ||
| 194 | return INTVAL_FRACTIONALMETRICS_OFF; | ||
| 195 | } else { | ||
| 196 | return INTVAL_FRACTIONALMETRICS_ON; | ||
| 197 | } | ||
| 198 | } | ||
| 199 | |||
| 200 | public FontStrikeDesc(AffineTransform devAt, AffineTransform at, | ||
| 201 | int fStyle, int aa, int fm) { | ||
| 202 | devTx = devAt; | ||
| 203 | glyphTx = at; // not cloning glyphTx. Callers trusted to not mutate it. | ||
| 204 | style = fStyle; | ||
| 205 | aaHint = aa; | ||
| 206 | fmHint = fm; | ||
| 207 | valuemask = fStyle; | ||
| 208 | switch (aa) { | ||
| 209 | case INTVAL_TEXT_ANTIALIAS_OFF : | ||
| 210 | break; | ||
| 211 | case INTVAL_TEXT_ANTIALIAS_ON : | ||
| 212 | valuemask |= AA_ON; | ||
| 213 | break; | ||
| 214 | case INTVAL_TEXT_ANTIALIAS_LCD_HRGB : | ||
| 215 | case INTVAL_TEXT_ANTIALIAS_LCD_HBGR : | ||
| 216 | valuemask |= AA_LCD_H; | ||
| 217 | break; | ||
| 218 | case INTVAL_TEXT_ANTIALIAS_LCD_VRGB : | ||
| 219 | case INTVAL_TEXT_ANTIALIAS_LCD_VBGR : | ||
| 220 | valuemask |= AA_LCD_V; | ||
| 221 | break; | ||
| 222 | default: break; | ||
| 223 | } | ||
| 224 | if (fm == INTVAL_FRACTIONALMETRICS_ON) { | ||
| 225 | valuemask |= FRAC_METRICS_ON; | ||
| 226 | } | ||
| 227 | } | ||
| 228 | |||
| 229 | FontStrikeDesc(FontStrikeDesc desc) { | ||
| 230 | devTx = desc.devTx; | ||
| 231 | // Clone the TX in this case as this is called when its known | ||
| 232 | // that "desc" is being re-used by its creator. | ||
| 233 | glyphTx = (AffineTransform)desc.glyphTx.clone(); | ||
| 234 | style = desc.style; | ||
| 235 | aaHint = desc.aaHint; | ||
| 236 | fmHint = desc.fmHint; | ||
| 237 | hashCode = desc.hashCode; | ||
| 238 | valuemask = desc.valuemask; | ||
| 239 | } | ||
| 240 | |||
| 241 | |||
| 242 | public String toString() { | ||
| 243 | return "FontStrikeDesc: Style="+style+ " AA="+aaHint+ " FM="+fmHint+ | ||
| 244 | " devTx="+devTx+ " devTx.FontTx.ptSize="+glyphTx; | ||
| 245 | } | ||
| 246 | } | ||