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
|
/*
* The Mana World
* Copyright (C) 2004 The Mana World Development Team
*
* This file is part of The Mana World.
*
* This program 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; either version 2 of the License, or
* any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <list>
#include <guichan/exception.hpp>
#include "truetypefont.h"
#include "../graphics.h"
#include "../resources/image.h"
#define CACHE_SIZE 256
class TextChunk
{
public:
TextChunk(const std::string &text, const gcn::Color &color) :
img(NULL), text(text), color(color)
{
}
~TextChunk()
{
delete img;
}
bool operator==(const TextChunk &chunk) const
{
return (chunk.text == text && chunk.color == color);
}
void generate(TTF_Font *font)
{
SDL_Color sdlCol;
sdlCol.b = color.b;
sdlCol.r = color.r;
sdlCol.g = color.g;
SDL_Surface *surface = TTF_RenderUTF8_Blended(
font, text.c_str(), sdlCol);
if (!surface)
{
throw "Rendering font to surface failed: " +
std::string(TTF_GetError());
}
img = Image::load(surface);
SDL_FreeSurface(surface);
}
Image *img;
std::string text;
gcn::Color color;
};
// Word surfaces cache
static std::list<TextChunk> cache;
typedef std::list<TextChunk>::iterator CacheIterator;
static int fontCounter;
TrueTypeFont::TrueTypeFont(const std::string &filename, int size)
{
if (fontCounter == 0 && TTF_Init() == -1)
{
throw GCN_EXCEPTION("Unable to initialize SDL_ttf: " +
std::string(TTF_GetError()));
}
++fontCounter;
mFont = TTF_OpenFont(filename.c_str(), size);
if (mFont == NULL)
{
throw GCN_EXCEPTION("SDLTrueTypeFont::SDLTrueTypeFont: " +
std::string(TTF_GetError()));
}
}
TrueTypeFont::~TrueTypeFont()
{
TTF_CloseFont(mFont);
--fontCounter;
if (fontCounter == 0)
{
TTF_Quit();
}
}
void TrueTypeFont::drawString(gcn::Graphics *graphics,
const std::string &text,
int x, int y)
{
if (text.empty())
return;
Graphics *g = dynamic_cast<Graphics *>(graphics);
if (!g)
{
throw "Not a valid graphics object!";
}
gcn::Color col = g->getColor();
const float alpha = col.a / 255.0f;
/* The alpha value is ignored at string generation so avoid caching the
* same text with different alpha values.
*/
col.a = 255;
TextChunk chunk(text, col);
bool found = false;
for (CacheIterator i = cache.begin(); i != cache.end(); i++)
{
if (chunk == (*i))
{
// Raise priority: move it to front
cache.splice(cache.begin(), cache, i);
found = true;
break;
}
}
// Surface not found
if (!found)
{
if (cache.size() >= CACHE_SIZE)
{
cache.pop_back();
}
cache.push_front(chunk);
cache.front().generate(mFont);
}
cache.front().img->setAlpha(alpha);
g->drawImage(cache.front().img, x, y);
}
int TrueTypeFont::getWidth(const std::string &text) const
{
int w, h;
TTF_SizeUTF8(mFont, text.c_str(), &w, &h);
return w;
}
int TrueTypeFont::getHeight() const
{
return TTF_FontHeight(mFont);
}
|
