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	/*
	* 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;
	}
	}

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