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
|
/*
* This file is part of RUfl
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license
* Copyright 2006 James Bursa <james@semichrome.net>
*/
#ifndef RUFL_H
#define RUFL_H
#include <inttypes.h>
#include <stdbool.h>
#include <stdlib.h>
#include "oslib/os.h"
/** Return code for RUfl functions. */
typedef enum {
/** Success. */
rufl_OK,
/** Failure: memory was exhausted. */
rufl_OUT_OF_MEMORY,
/** Failure: Font Manager error; details in rufl_fm_error. */
rufl_FONT_MANAGER_ERROR,
/** Failure: no font with this name exists. */
rufl_FONT_NOT_FOUND,
/** Failure: file input / output error: details in errno. */
rufl_IO_ERROR,
/** Failure: file input unexpected eof. */
rufl_IO_EOF,
} rufl_code;
/** Font weight and slant. Normal weight is 400, 700 gives the "Bold" weight of
* fonts. */
typedef enum {
rufl_WEIGHT_100 = 1,
rufl_WEIGHT_200 = 2,
rufl_WEIGHT_300 = 3,
rufl_WEIGHT_400 = 4,
rufl_WEIGHT_500 = 5,
rufl_WEIGHT_600 = 6,
rufl_WEIGHT_700 = 7,
rufl_WEIGHT_800 = 8,
rufl_WEIGHT_900 = 9,
rufl_SLANTED = 0x100,
} rufl_style;
/** rufl_paint flags */
#define rufl_BLEND_FONT 0x01
/** Last Font Manager error. */
extern os_error *rufl_fm_error;
/** List of available font families. */
extern const char **rufl_family_list;
/** Number of entries in rufl_family_list. */
extern size_t rufl_family_list_entries;
/** Menu of font families. */
extern void *rufl_family_menu;
/* Callbacks used by rufl_decompose_glyph */
typedef int (*rufl_move_to_func)(os_coord *to, void *user);
typedef int (*rufl_line_to_func)(os_coord *to, void *user);
typedef int (*rufl_cubic_to_func)(os_coord *control1, os_coord *control2,
os_coord *to, void *user);
struct rufl_decomp_funcs {
rufl_move_to_func move_to;
rufl_line_to_func line_to;
rufl_cubic_to_func cubic_to;
};
/**
* Initialise RUfl.
*
* All available fonts are scanned. May take some time.
*/
rufl_code rufl_init(void);
/**
* Render Unicode text.
*/
rufl_code rufl_paint(const char *font_family, rufl_style font_style,
unsigned int font_size,
const char *string, size_t length,
int x, int y, unsigned int flags);
/**
* Measure the width of Unicode text.
*/
rufl_code rufl_width(const char *font_family, rufl_style font_style,
unsigned int font_size,
const char *string, size_t length,
int *width);
/**
* Find where in a string a x coordinate falls.
*/
rufl_code rufl_x_to_offset(const char *font_family, rufl_style font_style,
unsigned int font_size,
const char *string, size_t length,
int click_x,
size_t *char_offset, int *actual_x);
/**
* Find the prefix of a string that will fit in a specified width.
*/
rufl_code rufl_split(const char *font_family, rufl_style font_style,
unsigned int font_size,
const char *string, size_t length,
int width,
size_t *char_offset, int *actual_x);
/** Type of callback function for rufl_paint_callback(). */
typedef void (*rufl_callback_t)(void *context,
const char *font_name, unsigned int font_size,
const uint8_t *s8, const uint32_t *s32, unsigned int n,
int x, int y);
/**
* Render text, but call a callback instead of each call to Font_Paint.
*/
rufl_code rufl_paint_callback(const char *font_family, rufl_style font_style,
unsigned int font_size,
const char *string, size_t length,
int x, int y,
rufl_callback_t callback, void *context);
/**
* Decompose a glyph to a path.
*/
rufl_code rufl_decompose_glyph(const char *font_family,
rufl_style font_style, unsigned int font_size,
const char *string, size_t length,
struct rufl_decomp_funcs *funcs, void *user);
/**
* Read metrics for a font
*/
rufl_code rufl_font_metrics(const char *font_family, rufl_style font_style,
os_box *bbox, int32_t *xkern, int32_t *ykern, int32_t *italic,
int32_t *ascent, int32_t *descent,
int32_t *xheight, int32_t *cap_height,
int8_t *uline_position, uint8_t *uline_thickness);
/**
* Read metrics for a glyph
*/
rufl_code rufl_glyph_metrics(const char *font_family,
rufl_style font_style, unsigned int font_size,
const char *string, size_t length,
int32_t *x_bearing, int32_t *y_bearing,
int32_t *width, int32_t *height,
int32_t *x_advance, int32_t *y_advance);
/**
* Determine the maximum bounding box of a font.
*/
rufl_code rufl_font_bbox(const char *font_family, rufl_style font_style,
unsigned int font_size, os_box *bbox);
/**
* Dump the internal library state to stdout.
*/
void rufl_dump_state(bool verbose);
/**
* Clear the internal font handle cache.
*
* Call this function on mode changes or output redirection changes.
*/
void rufl_invalidate_cache(void);
/**
* Free all resources used by the library.
*/
void rufl_quit(void);
#endif
|
