141 lines
3.2 KiB
C++
141 lines
3.2 KiB
C++
// Copyright (C) 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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*
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* Copyright (C) 1999-2015, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: SimpleFontInstance.cpp
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*
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* created on: 03/30/2006
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* created by: Eric R. Mader
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*/
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#include "unicode/utypes.h"
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#include "unicode/uchar.h"
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#include "layout/LETypes.h"
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#include "layout/LEFontInstance.h"
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#ifndef USING_ICULEHB
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#include "CanonShaping.h"
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#endif
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#include "SimpleFontInstance.h"
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SimpleFontInstance::SimpleFontInstance(float pointSize, LEErrorCode &status)
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: fPointSize(pointSize), fAscent(0), fDescent(0)
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{
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if (LE_FAILURE(status)) {
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return;
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}
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fAscent = (le_int32) yUnitsToPoints(2000.0);
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fDescent = (le_int32) yUnitsToPoints(600.0);
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return;
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}
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SimpleFontInstance::~SimpleFontInstance()
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{
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// nothing to do...
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}
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const void *SimpleFontInstance::getFontTable(LETag tableTag, size_t &length) const
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{
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length = -1; // unknown for this test.
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#ifndef USING_ICULEHB
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if (tableTag == LE_GSUB_TABLE_TAG) {
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return CanonShaping::glyphSubstitutionTable;
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}
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if (tableTag == LE_GDEF_TABLE_TAG) {
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return CanonShaping::glyphDefinitionTable;
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}
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#endif
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return NULL;
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}
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void SimpleFontInstance::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const
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{
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#if 0
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if (u_getCombiningClass((UChar32) glyph) == 0) {
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advance.fX = xUnitsToPoints(2048);
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} else {
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advance.fX = 0;
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}
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#else
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(void)glyph; // Suppress unused parameter compiler warning.
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advance.fX = xUnitsToPoints(2048);
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#endif
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advance.fY = 0;
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}
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le_int32 SimpleFontInstance::getUnitsPerEM() const
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{
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return 2048;
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}
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le_int32 SimpleFontInstance::getAscent() const
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{
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return fAscent;
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}
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le_int32 SimpleFontInstance::getDescent() const
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{
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return fDescent;
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}
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le_int32 SimpleFontInstance::getLeading() const
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{
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return 0;
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}
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// We really want to inherit this method from the superclass, but some compilers
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// issue a warning if we don't implement it...
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LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const
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{
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return LEFontInstance::mapCharToGlyph(ch, mapper, filterZeroWidth);
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}
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// We really want to inherit this method from the superclass, but some compilers
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// issue a warning if we don't implement it...
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LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const
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{
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return LEFontInstance::mapCharToGlyph(ch, mapper);
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}
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LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch) const
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{
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return (LEGlyphID) ch;
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}
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float SimpleFontInstance::getXPixelsPerEm() const
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{
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return fPointSize;
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}
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float SimpleFontInstance::getYPixelsPerEm() const
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{
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return fPointSize;
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}
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float SimpleFontInstance::getScaleFactorX() const
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{
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return 1.0;
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}
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float SimpleFontInstance::getScaleFactorY() const
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{
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return 1.0;
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}
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le_bool SimpleFontInstance::getGlyphPoint(LEGlyphID /*glyph*/, le_int32 /*pointNumber*/, LEPoint &/*point*/) const
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{
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return FALSE;
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}
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