| /* |
| * 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. |
| * |
| */ |
| |
| /* |
| ******************************************************************************* |
| * |
| * Copyright (C) 1999-2007, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ******************************************************************************* |
| * file name: LEFontInstance.cpp |
| * |
| * created on: 02/06/2003 |
| * created by: Eric R. Mader |
| */ |
| |
| #include "LETypes.h" |
| #include "LEScripts.h" |
| #include "LEFontInstance.h" |
| #include "LEGlyphStorage.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| UOBJECT_DEFINE_RTTI_IMPLEMENTATION(LEFontInstance) |
| |
| LECharMapper::~LECharMapper() |
| { |
| // nothing to do. |
| } |
| |
| LEFontInstance::~LEFontInstance() |
| { |
| // nothing to do |
| } |
| |
| const LEFontInstance *LEFontInstance::getSubFont(const LEUnicode chars[], le_int32 *offset, le_int32 limit, |
| le_int32 script, LEErrorCode &success) const |
| { |
| if (LE_FAILURE(success)) { |
| return NULL; |
| } |
| |
| if (chars == NULL || *offset < 0 || limit < 0 || *offset >= limit || script < 0 || script >= scriptCodeCount) { |
| success = LE_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } |
| |
| *offset = limit; |
| return this; |
| } |
| |
| void LEFontInstance::mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, |
| le_bool reverse, const LECharMapper *mapper, le_bool filterZeroWidth, LEGlyphStorage &glyphStorage) const |
| { |
| le_int32 i, out = 0, dir = 1; |
| |
| if (reverse) { |
| out = count - 1; |
| dir = -1; |
| } |
| |
| for (i = offset; i < offset + count; i += 1, out += dir) { |
| LEUnicode16 high = chars[i]; |
| LEUnicode32 code = high; |
| |
| if (i < offset + count - 1 && high >= 0xD800 && high <= 0xDBFF) { |
| LEUnicode16 low = chars[i + 1]; |
| |
| if (low >= 0xDC00 && low <= 0xDFFF) { |
| code = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000; |
| } |
| } |
| |
| glyphStorage[out] = mapCharToGlyph(code, mapper, filterZeroWidth); |
| |
| if (code >= 0x10000) { |
| i += 1; |
| glyphStorage[out += dir] = 0xFFFF; |
| } |
| } |
| } |
| |
| LEGlyphID LEFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const |
| { |
| return mapCharToGlyph(ch, mapper, TRUE); |
| } |
| |
| LEGlyphID LEFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const |
| { |
| LEUnicode32 mappedChar = mapper->mapChar(ch); |
| |
| if (mappedChar == 0xFFFE || mappedChar == 0xFFFF) { |
| return 0xFFFF; |
| } |
| |
| if (filterZeroWidth && (mappedChar == 0x200C || mappedChar == 0x200D)) { |
| return canDisplay(mappedChar)? 0x0001 : 0xFFFF; |
| } |
| |
| return mapCharToGlyph(mappedChar); |
| } |
| |
| le_bool LEFontInstance::canDisplay(LEUnicode32 ch) const |
| { |
| return LE_GET_GLYPH(mapCharToGlyph(ch)) != 0; |
| } |
| |
| float LEFontInstance::xUnitsToPoints(float xUnits) const |
| { |
| return (xUnits * getXPixelsPerEm()) / (float) getUnitsPerEM(); |
| } |
| |
| float LEFontInstance::yUnitsToPoints(float yUnits) const |
| { |
| return (yUnits * getYPixelsPerEm()) / (float) getUnitsPerEM(); |
| } |
| |
| void LEFontInstance::unitsToPoints(LEPoint &units, LEPoint &points) const |
| { |
| points.fX = xUnitsToPoints(units.fX); |
| points.fY = yUnitsToPoints(units.fY); |
| } |
| |
| float LEFontInstance::xPixelsToUnits(float xPixels) const |
| { |
| return (xPixels * getUnitsPerEM()) / (float) getXPixelsPerEm(); |
| } |
| |
| float LEFontInstance::yPixelsToUnits(float yPixels) const |
| { |
| return (yPixels * getUnitsPerEM()) / (float) getYPixelsPerEm(); |
| } |
| |
| void LEFontInstance::pixelsToUnits(LEPoint &pixels, LEPoint &units) const |
| { |
| units.fX = xPixelsToUnits(pixels.fX); |
| units.fY = yPixelsToUnits(pixels.fY); |
| } |
| |
| void LEFontInstance::transformFunits(float xFunits, float yFunits, LEPoint &pixels) const |
| { |
| pixels.fX = xUnitsToPoints(xFunits) * getScaleFactorX(); |
| pixels.fY = yUnitsToPoints(yFunits) * getScaleFactorY(); |
| } |
| |
| le_int32 LEFontInstance::getLineHeight() const |
| { |
| return getAscent() + getDescent() + getLeading(); |
| } |
| |
| U_NAMESPACE_END |
| |