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Diffstat (limited to 'Build/source/libs/icu/icu-49.1/layout/LEFontInstance.cpp')
-rw-r--r-- | Build/source/libs/icu/icu-49.1/layout/LEFontInstance.cpp | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/Build/source/libs/icu/icu-49.1/layout/LEFontInstance.cpp b/Build/source/libs/icu/icu-49.1/layout/LEFontInstance.cpp new file mode 100644 index 00000000000..eaca51a51b3 --- /dev/null +++ b/Build/source/libs/icu/icu-49.1/layout/LEFontInstance.cpp @@ -0,0 +1,154 @@ +/* + ******************************************************************************* + * + * 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(); +} + +void LEFontInstance::getKernPair(LEGlyphID leftGlyph, LEGlyphID rightGlyph, LEPoint &kern) const +{ + kern.fX = kern.fY = 0; +} + +U_NAMESPACE_END + |