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
SimpleFontInstance(float pointSize,LEErrorCode & status)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
~SimpleFontInstance()42 SimpleFontInstance::~SimpleFontInstance()
43 {
44 // nothing to do...
45 }
46
getFontTable(LETag tableTag) const47 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
getGlyphAdvance(LEGlyphID glyph,LEPoint & advance) const60 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
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 (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