| /* |
| * Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.font; |
| |
| /* |
| * This isn't a critical performance case, so don't do any |
| * char->glyph map caching for Type1 fonts. The ones that are used |
| * in composites will be cached there. |
| */ |
| |
| public final class Type1GlyphMapper extends CharToGlyphMapper { |
| |
| Type1Font font; |
| FontScaler scaler; |
| |
| public Type1GlyphMapper(Type1Font font) { |
| this.font = font; |
| initMapper(); |
| } |
| |
| private void initMapper() { |
| scaler = font.getScaler(); |
| try { |
| missingGlyph = scaler.getMissingGlyphCode(); |
| } catch (FontScalerException fe) { |
| scaler = FontScaler.getNullScaler(); |
| try { |
| missingGlyph = scaler.getMissingGlyphCode(); |
| } catch (FontScalerException e) { //should not happen |
| missingGlyph = 0; |
| } |
| } |
| } |
| |
| public int getNumGlyphs() { |
| try { |
| return scaler.getNumGlyphs(); |
| } catch (FontScalerException e) { |
| scaler = FontScaler.getNullScaler(); |
| return getNumGlyphs(); |
| } |
| } |
| |
| public int getMissingGlyphCode() { |
| return missingGlyph; |
| } |
| |
| public boolean canDisplay(char ch) { |
| try { |
| return scaler.getGlyphCode(ch) != missingGlyph; |
| } catch(FontScalerException e) { |
| scaler = FontScaler.getNullScaler(); |
| return canDisplay(ch); |
| } |
| } |
| |
| public int charToGlyph(char ch) { |
| try { |
| return scaler.getGlyphCode(ch); |
| } catch (FontScalerException e) { |
| scaler = FontScaler.getNullScaler(); |
| return charToGlyph(ch); |
| } |
| } |
| |
| public int charToGlyph(int ch) { |
| if (ch < 0 || ch > 0xffff) { |
| return missingGlyph; |
| } else { |
| try { |
| return scaler.getGlyphCode((char)ch); |
| } catch (FontScalerException e) { |
| scaler = FontScaler.getNullScaler(); |
| return charToGlyph(ch); |
| } |
| } |
| } |
| |
| public void charsToGlyphs(int count, char[] unicodes, int[] glyphs) { |
| /* The conversion into surrogates is misleading. |
| * The Type1 glyph mapper only accepts 16 bit unsigned shorts. |
| * If its > not in the range it can use assign the missing glyph. |
| */ |
| for (int i=0; i<count; i++) { |
| int code = unicodes[i]; // char is unsigned. |
| |
| if (code >= HI_SURROGATE_START && |
| code <= HI_SURROGATE_END && i < count - 1) { |
| char low = unicodes[i + 1]; |
| |
| if (low >= LO_SURROGATE_START && |
| low <= LO_SURROGATE_END) { |
| code = (code - HI_SURROGATE_START) * |
| 0x400 + low - LO_SURROGATE_START + 0x10000; |
| glyphs[i + 1] = 0xFFFF; // invisible glyph |
| } |
| } |
| glyphs[i] = charToGlyph(code); |
| if (code >= 0x10000) { |
| i += 1; // Empty glyph slot after surrogate |
| } |
| } |
| } |
| |
| public void charsToGlyphs(int count, int[] unicodes, int[] glyphs) { |
| /* I believe this code path is never exercised. Its there mainly |
| * for surrogates and/or the opentype engine which aren't likely |
| * to be an issue for Type1 fonts. So no need to optimise it. |
| */ |
| for (int i=0; i<count; i++) { |
| glyphs[i] = charToGlyph(unicodes[i]); |
| } |
| } |
| |
| |
| /* This variant checks if shaping is needed and immediately |
| * returns true if it does. A caller of this method should be expecting |
| * to check the return type because it needs to know how to handle |
| * the character data for display. |
| */ |
| public boolean charsToGlyphsNS(int count, char[] unicodes, int[] glyphs) { |
| |
| for (int i=0; i<count; i++) { |
| int code = unicodes[i]; // char is unsigned. |
| |
| if (code >= HI_SURROGATE_START && |
| code <= HI_SURROGATE_END && i < count - 1) { |
| char low = unicodes[i + 1]; |
| |
| if (low >= LO_SURROGATE_START && |
| low <= LO_SURROGATE_END) { |
| code = (code - HI_SURROGATE_START) * |
| 0x400 + low - LO_SURROGATE_START + 0x10000; |
| glyphs[i + 1] = INVISIBLE_GLYPH_ID; |
| } |
| } |
| |
| glyphs[i] = charToGlyph(code); |
| |
| if (code < FontUtilities.MIN_LAYOUT_CHARCODE) { |
| continue; |
| } |
| else if (FontUtilities.isComplexCharCode(code)) { |
| return true; |
| } |
| else if (code >= 0x10000) { |
| i += 1; // Empty glyph slot after surrogate |
| continue; |
| } |
| } |
| |
| return false; |
| } |
| } |