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.h
11  *
12  *   created on: 03/30/2006
13  *   created by: Eric R. Mader
14  */
15 
16 #ifndef __SIMPLEFONTINSTANCE_H
17 #define __SIMPLEFONTINSTANCE_H
18 
19 #include "layout/LETypes.h"
20 #include "layout/LEFontInstance.h"
21 
22 U_NAMESPACE_USE
23 
24 class SimpleFontInstance : public LEFontInstance
25 {
26 private:
27     float     fPointSize;
28     le_int32  fAscent;
29     le_int32  fDescent;
30 
31 protected:
32     const void *readFontTable(LETag tableTag) const;
33 
34 public:
35     SimpleFontInstance(float pointSize, LEErrorCode &status);
36 
37     virtual ~SimpleFontInstance();
38 
39     virtual const void *getFontTable(LETag tableTag, size_t &length) const;
40 
41     virtual le_int32 getUnitsPerEM() const;
42 
43     virtual le_int32 getAscent() const;
44 
45     virtual le_int32 getDescent() const;
46 
47     virtual le_int32 getLeading() const;
48 
49     // We really want to inherit this method from the superclass, but some compilers
50     // issue a warning if we don't implement it...
51     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const;
52 
53     // We really want to inherit this method from the superclass, but some compilers
54     // issue a warning if we don't implement it...
55     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const;
56 
57     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const;
58 
59     virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;
60 
61     virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;
62 
63     float getXPixelsPerEm() const;
64 
65     float getYPixelsPerEm() const;
66 
67     float getScaleFactorX() const;
68 
69     float getScaleFactorY() const;
70 
71 };
72 
73 #endif
74