1 /* 2 ******************************************************************************* 3 * 4 * Copyright (C) 1999-2007, International Business Machines 5 * Corporation and others. All Rights Reserved. 6 * 7 ******************************************************************************* 8 * file name: SimpleFontInstance.cpp 9 * 10 * created on: 03/30/2006 11 * created by: Eric R. Mader 12 */ 13 14 #include "unicode/utypes.h" 15 #include "unicode/uchar.h" 16 17 #include "layout/LETypes.h" 18 #include "layout/LEFontInstance.h" 19 20 #include "CanonShaping.h" 21 #include "SimpleFontInstance.h" 22 23 SimpleFontInstance::SimpleFontInstance(float pointSize, LEErrorCode &status) 24 : fPointSize(pointSize), fAscent(0), fDescent(0) 25 { 26 if (LE_FAILURE(status)) { 27 return; 28 } 29 30 fAscent = (le_int32) yUnitsToPoints(2000.0); 31 fDescent = (le_int32) yUnitsToPoints(600.0); 32 33 return; 34 } 35 36 SimpleFontInstance::~SimpleFontInstance() 37 { 38 // nothing to do... 39 } 40 41 const void *SimpleFontInstance::getFontTable(LETag tableTag) const 42 { 43 if (tableTag == LE_GSUB_TABLE_TAG) { 44 return CanonShaping::glyphSubstitutionTable; 45 } 46 47 if (tableTag == LE_GDEF_TABLE_TAG) { 48 return CanonShaping::glyphDefinitionTable; 49 } 50 51 return NULL; 52 } 53 54 void SimpleFontInstance::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const 55 { 56 #if 0 57 if (u_getCombiningClass((UChar32) glyph) == 0) { 58 advance.fX = xUnitsToPoints(2048); 59 } else { 60 advance.fX = 0; 61 } 62 #else 63 advance.fX = xUnitsToPoints(2048); 64 #endif 65 66 advance.fY = 0; 67 } 68 69 le_int32 SimpleFontInstance::getUnitsPerEM() const 70 { 71 return 2048; 72 } 73 74 le_int32 SimpleFontInstance::getAscent() const 75 { 76 return fAscent; 77 } 78 79 le_int32 SimpleFontInstance::getDescent() const 80 { 81 return fDescent; 82 } 83 84 le_int32 SimpleFontInstance::getLeading() const 85 { 86 return 0; 87 } 88 89 // We really want to inherit this method from the superclass, but some compilers 90 // issue a warning if we don't implement it... 91 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const 92 { 93 return LEFontInstance::mapCharToGlyph(ch, mapper, filterZeroWidth); 94 } 95 96 // We really want to inherit this method from the superclass, but some compilers 97 // issue a warning if we don't implement it... 98 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const 99 { 100 return LEFontInstance::mapCharToGlyph(ch, mapper); 101 } 102 103 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch) const 104 { 105 return (LEGlyphID) ch; 106 } 107 108 float SimpleFontInstance::getXPixelsPerEm() const 109 { 110 return fPointSize; 111 } 112 113 float SimpleFontInstance::getYPixelsPerEm() const 114 { 115 return fPointSize; 116 } 117 118 float SimpleFontInstance::getScaleFactorX() const 119 { 120 return 1.0; 121 } 122 123 float SimpleFontInstance::getScaleFactorY() const 124 { 125 return 1.0; 126 } 127 128 le_bool SimpleFontInstance::getGlyphPoint(LEGlyphID /*glyph*/, le_int32 /*pointNumber*/, LEPoint &/*point*/) const 129 { 130 return FALSE; 131 } 132 133
