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 "layout/CanonShaping.h"
24 #endif
25
26 #include "SimpleFontInstance.h"
27
SimpleFontInstance(float pointSize,LEErrorCode & status)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 = static_cast<le_int32>(yUnitsToPoints(2000.0));
36 fDescent = static_cast<le_int32>(yUnitsToPoints(600.0));
37 }
38
~SimpleFontInstance()39 SimpleFontInstance::~SimpleFontInstance()
40 {
41 // nothing to do...
42 }
43
getFontTable(LETag tableTag,size_t & length) const44 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 nullptr;
57 }
58
getGlyphAdvance(LEGlyphID glyph,LEPoint & advance) const59 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
getUnitsPerEM() const75 le_int32 SimpleFontInstance::getUnitsPerEM() const
76 {
77 return 2048;
78 }
79
getAscent() const80 le_int32 SimpleFontInstance::getAscent() const
81 {
82 return fAscent;
83 }
84
getDescent() const85 le_int32 SimpleFontInstance::getDescent() const
86 {
87 return fDescent;
88 }
89
getLeading() const90 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...
mapCharToGlyph(LEUnicode32 ch,const LECharMapper * mapper,le_bool filterZeroWidth) const97 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...
mapCharToGlyph(LEUnicode32 ch,const LECharMapper * mapper) const104 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const
105 {
106 return LEFontInstance::mapCharToGlyph(ch, mapper);
107 }
108
mapCharToGlyph(LEUnicode32 ch) const109 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch) const
110 {
111 return static_cast<LEGlyphID>(ch);
112 }
113
getXPixelsPerEm() const114 float SimpleFontInstance::getXPixelsPerEm() const
115 {
116 return fPointSize;
117 }
118
getYPixelsPerEm() const119 float SimpleFontInstance::getYPixelsPerEm() const
120 {
121 return fPointSize;
122 }
123
getScaleFactorX() const124 float SimpleFontInstance::getScaleFactorX() const
125 {
126 return 1.0;
127 }
128
getScaleFactorY() const129 float SimpleFontInstance::getScaleFactorY() const
130 {
131 return 1.0;
132 }
133
getGlyphPoint(LEGlyphID,le_int32,LEPoint &) const134 le_bool SimpleFontInstance::getGlyphPoint(LEGlyphID /*glyph*/, le_int32 /*pointNumber*/, LEPoint &/*point*/) const
135 {
136 return false;
137 }
138
139