icuSources/test/perf/leperf/SimpleFontInstance.cpp

   1 /*
   2  *******************************************************************************
   3  *
   4  *   Copyright (C) 1999-2013, 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 "layout/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