1 // 2016 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 /* 4 ******************************************************************************* 5 * 6 * Copyright (C) 1999-2015, International Business Machines 7 * Corporation and others. All Rights Reserved. 8 * 9 ******************************************************************************* 10 * file name: SimpleFontInstance.cpp 11 * 12 * created on: 03/30/2006 13 * created by: Eric R. Mader 14 */ 15 16 #include "unicode/utypes.h" 17 #include "unicode/uchar.h" 18 19 #include "layout/LETypes.h" 20 #include "layout/LEFontInstance.h" 21 22 #ifndef USING_ICULEHB 23 #include "CanonShaping.h" 24 #endif 25 26 #include "SimpleFontInstance.h" 27 28 SimpleFontInstance::SimpleFontInstance(float pointSize, LEErrorCode &status) 29 : fPointSize(pointSize), fAscent(0), fDescent(0) 30 { 31 if (LE_FAILURE(status)) { 32 return; 33 } 34 35 fAscent = (le_int32) yUnitsToPoints(2000.0); 36 fDescent = (le_int32) yUnitsToPoints(600.0); 37 38 return; 39 } 40 41 SimpleFontInstance::~SimpleFontInstance() 42 { 43 // nothing to do... 44 } 45 46 const void *SimpleFontInstance::getFontTable(LETag tableTag, size_t &length) const 47 { 48 length = -1; // unknown for this test. 49 #ifndef USING_ICULEHB 50 if (tableTag == LE_GSUB_TABLE_TAG) { 51 return CanonShaping::glyphSubstitutionTable; 52 } 53 54 if (tableTag == LE_GDEF_TABLE_TAG) { 55 return CanonShaping::glyphDefinitionTable; 56 } 57 #endif 58 return NULL; 59 } 60 61 void SimpleFontInstance::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const 62 { 63 #if 0 64 if (u_getCombiningClass((UChar32) glyph) == 0) { 65 advance.fX = xUnitsToPoints(2048); 66 } else { 67 advance.fX = 0; 68 } 69 #else 70 (void)glyph; // Suppress unused parameter compiler warning. 71 advance.fX = xUnitsToPoints(2048); 72 #endif 73 74 advance.fY = 0; 75 } 76 77 le_int32 SimpleFontInstance::getUnitsPerEM() const 78 { 79 return 2048; 80 } 81 82 le_int32 SimpleFontInstance::getAscent() const 83 { 84 return fAscent; 85 } 86 87 le_int32 SimpleFontInstance::getDescent() const 88 { 89 return fDescent; 90 } 91 92 le_int32 SimpleFontInstance::getLeading() const 93 { 94 return 0; 95 } 96 97 // We really want to inherit this method from the superclass, but some compilers 98 // issue a warning if we don't implement it... 99 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const 100 { 101 return LEFontInstance::mapCharToGlyph(ch, mapper, filterZeroWidth); 102 } 103 104 // We really want to inherit this method from the superclass, but some compilers 105 // issue a warning if we don't implement it... 106 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const 107 { 108 return LEFontInstance::mapCharToGlyph(ch, mapper); 109 } 110 111 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch) const 112 { 113 return (LEGlyphID) ch; 114 } 115 116 float SimpleFontInstance::getXPixelsPerEm() const 117 { 118 return fPointSize; 119 } 120 121 float SimpleFontInstance::getYPixelsPerEm() const 122 { 123 return fPointSize; 124 } 125 126 float SimpleFontInstance::getScaleFactorX() const 127 { 128 return 1.0; 129 } 130 131 float SimpleFontInstance::getScaleFactorY() const 132 { 133 return 1.0; 134 } 135 136 le_bool SimpleFontInstance::getGlyphPoint(LEGlyphID /*glyph*/, le_int32 /*pointNumber*/, LEPoint &/*point*/) const 137 { 138 return FALSE; 139 } 140 141
