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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 | +} | |