1 /* 2 ******************************************************************************* 3 * 4 * 2016 and later: Unicode, Inc. and others. 5 * License & terms of use: http://www.unicode.org/copyright.html#License 6 * 7 ******************************************************************************* 8 ******************************************************************************* 9 * 10 * Copyright (C) 1999-2013, International Business Machines 11 * Corporation and others. All Rights Reserved. 12 * 13 ******************************************************************************* 14 * file name: SimpleFontInstance.cpp 15 * 16 * created on: 03/30/2006 17 * created by: Eric R. Mader 18 */ 19 20 #include "unicode/utypes.h" 21 #include "unicode/uchar.h" 22 23 #include "layout/LETypes.h" 24 #include "layout/LEFontInstance.h" 25 26 #include "layout/CanonShaping.h" 27 #include "SimpleFontInstance.h" 28 29 SimpleFontInstance::SimpleFontInstance(float pointSize, LEErrorCode &status) 30 : fPointSize(pointSize), fAscent(0), fDescent(0) 31 { 32 if (LE_FAILURE(status)) { 33 return; 34 } 35 36 fAscent = (le_int32) yUnitsToPoints(2000.0); 37 fDescent = (le_int32) yUnitsToPoints(600.0); 38 39 return; 40 } 41 42 SimpleFontInstance::~SimpleFontInstance() 43 { 44 // nothing to do... 45 } 46 47 const void *SimpleFontInstance::getFontTable(LETag tableTag) const 48 { 49 if (tableTag == LE_GSUB_TABLE_TAG) { 50 return CanonShaping::glyphSubstitutionTable; 51 } 52 53 if (tableTag == LE_GDEF_TABLE_TAG) { 54 return CanonShaping::glyphDefinitionTable; 55 } 56 57 return NULL; 58 } 59 60 void SimpleFontInstance::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const 61 { 62 #if 0 63 if (u_getCombiningClass((UChar32) glyph) == 0) { 64 advance.fX = xUnitsToPoints(2048); 65 } else { 66 advance.fX = 0; 67 } 68 #else 69 advance.fX = xUnitsToPoints(2048); 70 #endif 71 72 advance.fY = 0; 73 } 74 75 le_int32 SimpleFontInstance::getUnitsPerEM() const 76 { 77 return 2048; 78 } 79 80 le_int32 SimpleFontInstance::getAscent() const 81 { 82 return fAscent; 83 } 84 85 le_int32 SimpleFontInstance::getDescent() const 86 { 87 return fDescent; 88 } 89 90 le_int32 SimpleFontInstance::getLeading() const 91 { 92 return 0; 93 } 94 95 // We really want to inherit this method from the superclass, but some compilers 96 // issue a warning if we don't implement it... 97 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const 98 { 99 return LEFontInstance::mapCharToGlyph(ch, mapper, filterZeroWidth); 100 } 101 102 // We really want to inherit this method from the superclass, but some compilers 103 // issue a warning if we don't implement it... 104 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const 105 { 106 return LEFontInstance::mapCharToGlyph(ch, mapper); 107 } 108 109 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch) const 110 { 111 return (LEGlyphID) ch; 112 } 113 114 float SimpleFontInstance::getXPixelsPerEm() const 115 { 116 return fPointSize; 117 } 118 119 float SimpleFontInstance::getYPixelsPerEm() const 120 { 121 return fPointSize; 122 } 123 124 float SimpleFontInstance::getScaleFactorX() const 125 { 126 return 1.0; 127 } 128 129 float SimpleFontInstance::getScaleFactorY() const 130 { 131 return 1.0; 132 } 133 134 le_bool SimpleFontInstance::getGlyphPoint(LEGlyphID /*glyph*/, le_int32 /*pointNumber*/, LEPoint &/*point*/) const 135 { 136 return FALSE; 137 } 138 139
