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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2006, 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 | /* | ||
| 29 | * This isn't a critical performance case, so don't do any | ||
| 30 | * char->glyph map caching for Type1 fonts. The ones that are used | ||
| 31 | * in composites will be cached there. | ||
| 32 | */ | ||
| 33 | |||
| 34 | public final class Type1GlyphMapper extends CharToGlyphMapper { | ||
| 35 | |||
| 36 | Type1Font font; | ||
| 37 | FontScaler scaler; | ||
| 38 | |||
| 39 | public Type1GlyphMapper(Type1Font font) { | ||
| 40 | this.font = font; | ||
| 41 | initMapper(); | ||
| 42 | } | ||
| 43 | |||
| 44 | private void initMapper() { | ||
| 45 | scaler = font.getScaler(); | ||
| 46 | try { | ||
| 47 | missingGlyph = scaler.getMissingGlyphCode(); | ||
| 48 | } catch (FontScalerException fe) { | ||
| 49 | scaler = FontScaler.getNullScaler(); | ||
| 50 | try { | ||
| 51 | missingGlyph = scaler.getMissingGlyphCode(); | ||
| 52 | } catch (FontScalerException e) { //should not happen | ||
| 53 | missingGlyph = 0; | ||
| 54 | } | ||
| 55 | } | ||
| 56 | } | ||
| 57 | |||
| 58 | public int getNumGlyphs() { | ||
| 59 | try { | ||
| 60 | return scaler.getNumGlyphs(); | ||
| 61 | } catch (FontScalerException e) { | ||
| 62 | scaler = FontScaler.getNullScaler(); | ||
| 63 | return getNumGlyphs(); | ||
| 64 | } | ||
| 65 | } | ||
| 66 | |||
| 67 | public int getMissingGlyphCode() { | ||
| 68 | return missingGlyph; | ||
| 69 | } | ||
| 70 | |||
| 71 | public boolean canDisplay(char ch) { | ||
| 72 | try { | ||
| 73 | return scaler.getGlyphCode(ch) != missingGlyph; | ||
| 74 | } catch(FontScalerException e) { | ||
| 75 | scaler = FontScaler.getNullScaler(); | ||
| 76 | return canDisplay(ch); | ||
| 77 | } | ||
| 78 | } | ||
| 79 | |||
| 80 | public int charToGlyph(char ch) { | ||
| 81 | try { | ||
| 82 | return scaler.getGlyphCode(ch); | ||
| 83 | } catch (FontScalerException e) { | ||
| 84 | scaler = FontScaler.getNullScaler(); | ||
| 85 | return charToGlyph(ch); | ||
| 86 | } | ||
| 87 | } | ||
| 88 | |||
| 89 | public int charToGlyph(int ch) { | ||
| 90 | if (ch < 0 || ch > 0xffff) { | ||
| 91 | return missingGlyph; | ||
| 92 | } else { | ||
| 93 | try { | ||
| 94 | return scaler.getGlyphCode((char)ch); | ||
| 95 | } catch (FontScalerException e) { | ||
| 96 | scaler = FontScaler.getNullScaler(); | ||
| 97 | return charToGlyph(ch); | ||
| 98 | } | ||
| 99 | } | ||
| 100 | } | ||
| 101 | |||
| 102 | public void charsToGlyphs(int count, char[] unicodes, int[] glyphs) { | ||
| 103 | /* The conversion into surrogates is misleading. | ||
| 104 | * The Type1 glyph mapper only accepts 16 bit unsigned shorts. | ||
| 105 | * If its > not in the range it can use assign the missing glyph. | ||
| 106 | */ | ||
| 107 | for (int i=0; i<count; i++) { | ||
| 108 | int code = unicodes[i]; // char is unsigned. | ||
| 109 | |||
| 110 | if (code >= HI_SURROGATE_START && | ||
| 111 | code <= HI_SURROGATE_END && i < count - 1) { | ||
| 112 | char low = unicodes[i + 1]; | ||
| 113 | |||
| 114 | if (low >= LO_SURROGATE_START && | ||
| 115 | low <= LO_SURROGATE_END) { | ||
| 116 | code = (code - HI_SURROGATE_START) * | ||
| 117 | 0x400 + low - LO_SURROGATE_START + 0x10000; | ||
| 118 | glyphs[i + 1] = 0xFFFF; // invisible glyph | ||
| 119 | } | ||
| 120 | } | ||
| 121 | glyphs[i] = charToGlyph(code); | ||
| 122 | if (code >= 0x10000) { | ||
| 123 | i += 1; // Empty glyph slot after surrogate | ||
| 124 | } | ||
| 125 | } | ||
| 126 | } | ||
| 127 | |||
| 128 | public void charsToGlyphs(int count, int[] unicodes, int[] glyphs) { | ||
| 129 | /* I believe this code path is never exercised. Its there mainly | ||
| 130 | * for surrogates and/or the opentype engine which aren't likely | ||
| 131 | * to be an issue for Type1 fonts. So no need to optimise it. | ||
| 132 | */ | ||
| 133 | for (int i=0; i<count; i++) { | ||
| 134 | glyphs[i] = charToGlyph(unicodes[i]); | ||
| 135 | } | ||
| 136 | } | ||
| 137 | |||
| 138 | |||
| 139 | /* This variant checks if shaping is needed and immediately | ||
| 140 | * returns true if it does. A caller of this method should be expecting | ||
| 141 | * to check the return type because it needs to know how to handle | ||
| 142 | * the character data for display. | ||
| 143 | */ | ||
| 144 | public boolean charsToGlyphsNS(int count, char[] unicodes, int[] glyphs) { | ||
| 145 | |||
| 146 | for (int i=0; i<count; i++) { | ||
| 147 | int code = unicodes[i]; // char is unsigned. | ||
| 148 | |||
| 149 | if (code >= HI_SURROGATE_START && | ||
| 150 | code <= HI_SURROGATE_END && i < count - 1) { | ||
| 151 | char low = unicodes[i + 1]; | ||
| 152 | |||
| 153 | if (low >= LO_SURROGATE_START && | ||
| 154 | low <= LO_SURROGATE_END) { | ||
| 155 | code = (code - HI_SURROGATE_START) * | ||
| 156 | 0x400 + low - LO_SURROGATE_START + 0x10000; | ||
| 157 | glyphs[i + 1] = INVISIBLE_GLYPH_ID; | ||
| 158 | } | ||
| 159 | } | ||
| 160 | |||
| 161 | glyphs[i] = charToGlyph(code); | ||
| 162 | |||
| 163 | if (code < FontUtilities.MIN_LAYOUT_CHARCODE) { | ||
| 164 | continue; | ||
| 165 | } | ||
| 166 | else if (FontUtilities.isComplexCharCode(code)) { | ||
| 167 | return true; | ||
| 168 | } | ||
| 169 | else if (code >= 0x10000) { | ||
| 170 | i += 1; // Empty glyph slot after surrogate | ||
| 171 | continue; | ||
| 172 | } | ||
| 173 | } | ||
| 174 | |||
| 175 | return false; | ||
| 176 | } | ||
| 177 | } | ||