1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file fontcache.h Functions to read fonts from files and cache them. */
#ifndef FONTCACHE_H
#define FONTCACHE_H
#include "string_type.h"
#include "spritecache.h"
/** Glyphs are characters from a font. */
typedef uint32 GlyphID;
static const GlyphID SPRITE_GLYPH = 1U << 30;
/** Font cache for basic fonts. */
class FontCache {
private:
static FontCache *caches[FS_END]; ///< All the font caches.
protected:
FontCache *parent; ///< The parent of this font cache.
const FontSize fs; ///< The size of the font.
int height; ///< The height of the font.
int ascender; ///< The ascender value of the font.
int descender; ///< The descender value of the font.
int units_per_em; ///< The units per EM value of the font.
public:
FontCache(FontSize fs);
virtual ~FontCache();
/**
* Get the FontSize of the font.
* @return The FontSize.
*/
inline FontSize GetSize() const { return this->fs; }
/**
* Get the height of the font.
* @return The height of the font.
*/
inline int GetHeight() const { return this->height; }
/**
* Get the ascender value of the font.
* @return The ascender value of the font.
*/
inline int GetAscender() const { return this->ascender; }
/**
* Get the descender value of the font.
* @return The descender value of the font.
*/
inline int GetDescender() const{ return this->descender; }
/**
* Get the units per EM value of the font.
* @return The units per EM value of the font.
*/
inline int GetUnitsPerEM() const { return this->units_per_em; }
/**
* Get the SpriteID mapped to the given key
* @param key The key to get the sprite for.
* @return The sprite.
*/
virtual SpriteID GetUnicodeGlyph(WChar key) = 0;
/**
* Map a SpriteID to the key
* @param key The key to map to.
* @param sprite The sprite that is being mapped.
*/
virtual void SetUnicodeGlyph(WChar key, SpriteID sprite) = 0;
/** Initialize the glyph map */
virtual void InitializeUnicodeGlyphMap() = 0;
/** Clear the font cache. */
virtual void ClearFontCache() = 0;
/**
* Get the glyph (sprite) of the given key.
* @param key The key to look up.
* @return The sprite.
*/
virtual const Sprite *GetGlyph(GlyphID key) = 0;
/**
* Get the width of the glyph with the given key.
* @param key The key to look up.
* @return The width.
*/
virtual uint GetGlyphWidth(GlyphID key) = 0;
/**
* Do we need to draw a glyph shadow?
* @return True if it has to be done, otherwise false.
*/
virtual bool GetDrawGlyphShadow() = 0;
/**
* Map a character into a glyph.
* @param key The character.
* @return The glyph ID used to draw the character.
*/
virtual GlyphID MapCharToGlyph(WChar key) = 0;
/**
* Read a font table from the font.
* @param tag The of the table to load.
* @return The loaded table data.
*/
virtual const void *GetFontTable(uint32 tag) = 0;
/**
* Get the font cache of a given font size.
* @param fs The font size to look up.
* @return The font cache.
*/
static inline FontCache *Get(FontSize fs)
{
assert(fs < FS_END);
return FontCache::caches[fs];
}
/**
* Check whether the font cache has a parent.
*/
inline bool HasParent()
{
return this->parent != NULL;
}
};
/** Get the SpriteID mapped to the given font size and key */
static inline SpriteID GetUnicodeGlyph(FontSize size, WChar key)
{
return FontCache::Get(size)->GetUnicodeGlyph(key);
}
/** Map a SpriteID to the font size and key */
static inline void SetUnicodeGlyph(FontSize size, WChar key, SpriteID sprite)
{
FontCache::Get(size)->SetUnicodeGlyph(key, sprite);
}
/** Initialize the glyph map */
static inline void InitializeUnicodeGlyphMap()
{
for (FontSize fs = FS_BEGIN; fs < FS_END; fs++) {
FontCache::Get(fs)->InitializeUnicodeGlyphMap();
}
}
static inline void ClearFontCache() {
for (FontSize fs = FS_BEGIN; fs < FS_END; fs++) {
FontCache::Get(fs)->ClearFontCache();
}
}
/** Get the Sprite for a glyph */
static inline const Sprite *GetGlyph(FontSize size, WChar key)
{
FontCache *fc = FontCache::Get(size);
return fc->GetGlyph(fc->MapCharToGlyph(key));
}
/** Get the width of a glyph */
static inline uint GetGlyphWidth(FontSize size, WChar key)
{
FontCache *fc = FontCache::Get(size);
return fc->GetGlyphWidth(fc->MapCharToGlyph(key));
}
static inline bool GetDrawGlyphShadow(FontSize size)
{
return FontCache::Get(size)->GetDrawGlyphShadow();
}
#ifdef WITH_FREETYPE
/** Settings for a single freetype font. */
struct FreeTypeSubSetting {
char font[MAX_PATH]; ///< The name of the font, or path to the font.
uint size; ///< The (requested) size of the font.
bool aa; ///< Whether to do anti aliasing or not.
};
/** Settings for the freetype fonts. */
struct FreeTypeSettings {
FreeTypeSubSetting small; ///< The smallest font; mostly used for zoomed out view.
FreeTypeSubSetting medium; ///< The normal font size.
FreeTypeSubSetting large; ///< The largest font; mostly used for newspapers.
FreeTypeSubSetting mono; ///< The mono space font used for license/readme viewers.
};
extern FreeTypeSettings _freetype;
#endif /* WITH_FREETYPE */
void InitFreeType(bool monospace);
void UninitFreeType();
#endif /* FONTCACHE_H */
|
