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
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 = (le_int32) yUnitsToPoints(2000.0);
36 fDescent = (le_int32) yUnitsToPoints(600.0);
37
38 return;
39 }
40
~SimpleFontInstance()41 SimpleFontInstance::~SimpleFontInstance()
42 {
43 // nothing to do...
44 }
45
getFontTable(LETag tableTag,size_t & length) const46 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
getGlyphAdvance(LEGlyphID glyph,LEPoint & advance) const61 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
getUnitsPerEM() const77 le_int32 SimpleFontInstance::getUnitsPerEM() const
78 {
79 return 2048;
80 }
81
getAscent() const82 le_int32 SimpleFontInstance::getAscent() const
83 {
84 return fAscent;
85 }
86
getDescent() const87 le_int32 SimpleFontInstance::getDescent() const
88 {
89 return fDescent;
90 }
91
getLeading() const92 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...
mapCharToGlyph(LEUnicode32 ch,const LECharMapper * mapper,le_bool filterZeroWidth) const99 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...
mapCharToGlyph(LEUnicode32 ch,const LECharMapper * mapper) const106 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const
107 {
108 return LEFontInstance::mapCharToGlyph(ch, mapper);
109 }
110
mapCharToGlyph(LEUnicode32 ch) const111 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch) const
112 {
113 return (LEGlyphID) ch;
114 }
115
getXPixelsPerEm() const116 float SimpleFontInstance::getXPixelsPerEm() const
117 {
118 return fPointSize;
119 }
120
getYPixelsPerEm() const121 float SimpleFontInstance::getYPixelsPerEm() const
122 {
123 return fPointSize;
124 }
125
getScaleFactorX() const126 float SimpleFontInstance::getScaleFactorX() const
127 {
128 return 1.0;
129 }
130
getScaleFactorY() const131 float SimpleFontInstance::getScaleFactorY() const
132 {
133 return 1.0;
134 }
135
getGlyphPoint(LEGlyphID,le_int32,LEPoint &) const136 le_bool SimpleFontInstance::getGlyphPoint(LEGlyphID /*glyph*/, le_int32 /*pointNumber*/, LEPoint &/*point*/) const
137 {
138 return FALSE;
139 }
140
141