1 /*
2 * FTGL - OpenGL font library
3 *
4 * Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sublicense, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be
15 * included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
21 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26 #include "config.h"
27
28 #include "FTSize.h"
29
30
FTSize()31 FTSize::FTSize()
32 : ftFace(0),
33 ftSize(0),
34 size(0),
35 xResolution(0),
36 yResolution(0),
37 err(0)
38 {}
39
40
~FTSize()41 FTSize::~FTSize()
42 {}
43
44
CharSize(FT_Face * face,unsigned int pointSize,unsigned int xRes,unsigned int yRes)45 bool FTSize::CharSize(FT_Face* face, unsigned int pointSize, unsigned int xRes, unsigned int yRes)
46 {
47 if(size != pointSize || xResolution != xRes || yResolution != yRes)
48 {
49 err = FT_Set_Char_Size(*face, 0L, pointSize * 64, xResolution, yResolution);
50
51 if(!err)
52 {
53 ftFace = face;
54 size = pointSize;
55 xResolution = xRes;
56 yResolution = yRes;
57 ftSize = (*ftFace)->size;
58 }
59 }
60
61 return !err;
62 }
63
64
CharSize() const65 unsigned int FTSize::CharSize() const
66 {
67 return size;
68 }
69
70
Ascender() const71 float FTSize::Ascender() const
72 {
73 return ftSize == 0 ? 0.0f : static_cast<float>(ftSize->metrics.ascender) / 64.0f;
74 }
75
76
Descender() const77 float FTSize::Descender() const
78 {
79 return ftSize == 0 ? 0.0f : static_cast<float>(ftSize->metrics.descender) / 64.0f;
80 }
81
82
Height() const83 float FTSize::Height() const
84 {
85 if(0 == ftSize)
86 {
87 return 0.0f;
88 }
89
90 if(FT_IS_SCALABLE((*ftFace)))
91 {
92 return ((*ftFace)->bbox.yMax - (*ftFace)->bbox.yMin) * ((float)ftSize->metrics.y_ppem / (float)(*ftFace)->units_per_EM);
93 }
94 else
95 {
96 return static_cast<float>(ftSize->metrics.height) / 64.0f;
97 }
98 }
99
100
Width() const101 float FTSize::Width() const
102 {
103 if(0 == ftSize)
104 {
105 return 0.0f;
106 }
107
108 if(FT_IS_SCALABLE((*ftFace)))
109 {
110 return ((*ftFace)->bbox.xMax - (*ftFace)->bbox.xMin) * (static_cast<float>(ftSize->metrics.x_ppem) / static_cast<float>((*ftFace)->units_per_EM));
111 }
112 else
113 {
114 return static_cast<float>(ftSize->metrics.max_advance) / 64.0f;
115 }
116 }
117
118
Underline() const119 float FTSize::Underline() const
120 {
121 return 0.0f;
122 }
123
124