icuSources/test/letest/SimpleFontInstance.cpp

   1 /*
   2  *******************************************************************************
   3  *
   4  *   Copyright (C) 1999-2015, 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 #ifndef USING_ICULEHB
  21 #include "CanonShaping.h"
  22 #endif
  23
  24 #include "SimpleFontInstance.h"
  25
  26 SimpleFontInstance::SimpleFontInstance(float pointSize, LEErrorCode &status)
  27     : fPointSize(pointSize), fAscent(0), fDescent(0)
  28 {
  29     if (LE_FAILURE(status)) {
  30         return;
  31     }
  32
  33     fAscent  = (le_int32) yUnitsToPoints(2000.0);
  34     fDescent = (le_int32) yUnitsToPoints(600.0);
  35
  36     return;
  37 }
  38
  39 SimpleFontInstance::~SimpleFontInstance()
  40 {
  41     // nothing to do...
  42 }
  43
  44 const void *SimpleFontInstance::getFontTable(LETag tableTag, size_t &length) const
  45 {
  46   length = -1; // unknown for this test.
  47 #ifndef USING_ICULEHB
  48     if (tableTag == LE_GSUB_TABLE_TAG) {
  49         return CanonShaping::glyphSubstitutionTable;
  50     }
  51
  52     if (tableTag == LE_GDEF_TABLE_TAG) {
  53         return CanonShaping::glyphDefinitionTable;
  54     }
  55 #endif
  56     return NULL;
  57 }
  58
  59 void SimpleFontInstance::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const
  60 {
  61 #if 0
  62     if (u_getCombiningClass((UChar32) glyph) == 0) {
  63         advance.fX = xUnitsToPoints(2048);
  64     } else {
  65         advance.fX = 0;
  66     }
  67 #else
  68     (void)glyph;  // Suppress unused parameter compiler warning.
  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