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
|
/*
* This file is part of RUfl
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license
* Copyright 2005 John-Mark Bell <jmb202@ecs.soton.ac.uk>
*/
#include <assert.h>
#include <stdio.h>
#include "oslib/font.h"
#include "rufl_internal.h"
/**
* Process a Draw path object
*
* \param path Pointer to path block
* \param funcs Struct of callback functions
* \param user User pointer to be passed to callbacks
* \return Pointer to word after this path, or NULL to terminate processing
*/
static int *process_path(int *path, struct rufl_decomp_funcs *funcs,
void *user)
{
/* skip forward to style entry */
path += 9;
/* skip dash pattern */
if (path[0] & (1<<7))
path += path[2] + 2;
/* and move to start of path components */
path++;
while (path[0] != 0) {
switch (path[0]) {
case 2: /* Move to */
if (funcs->move_to((os_coord *)(path + 1), user))
return NULL;
path += 3;
break;
case 5: /* Close path */
path++;
break;
case 6: /* Cubic Bezier to */
if (funcs->cubic_to((os_coord *)(path + 1),
(os_coord *)(path + 3),
(os_coord *)(path + 5),
user))
return NULL;
path += 7;
break;
case 8: /* Line to */
if (funcs->line_to((os_coord *)(path + 1), user))
return NULL;
path += 3;
break;
default: /* Anything else is broken */
assert(0);
}
}
/* + 1 to account for tag 0 - end of path */
return path + 1;
}
rufl_code rufl_decompose_glyph(const char *font_family,
rufl_style font_style, unsigned int font_size,
const char *string, size_t len,
struct rufl_decomp_funcs *funcs, void *user)
{
int *buf, *p, *ep;
int buf_size;
char *buf_end;
rufl_code err;
/* Get required buffer size */
rufl_fm_error = xfont_switch_output_to_buffer(
font_NO_OUTPUT | font_ADD_HINTS, (byte *)8, 0);
if (rufl_fm_error) {
LOG("xfont_switch_output_to_buffer: 0x%x: %s",
rufl_fm_error->errnum,
rufl_fm_error->errmess);
return rufl_FONT_MANAGER_ERROR;
}
err = rufl_paint(font_family, font_style, font_size, string, len,
0, 0, rufl_BLEND_FONT);
if (err) {
/* reset font redirection - too bad if this fails */
xfont_switch_output_to_buffer(0, 0, 0);
return err;
}
rufl_fm_error = xfont_switch_output_to_buffer(0, NULL, &buf_end);
if (rufl_fm_error) {
LOG("xfont_switch_output_to_buffer: 0x%x: %s",
rufl_fm_error->errnum,
rufl_fm_error->errmess);
return rufl_FONT_MANAGER_ERROR;
}
buf_size = buf_end - (char *)NULL;
/* Allocate and initialise buffer */
buf = malloc(buf_size);
if (!buf) {
LOG("Failed to allocate decompose buffer of size %i", buf_size);
return rufl_OUT_OF_MEMORY;
}
buf[0] = 0;
buf[1] = buf_size - 8;
/* Populate buffer */
rufl_fm_error = xfont_switch_output_to_buffer(
font_ADD_HINTS, (byte *)buf, 0);
if (rufl_fm_error) {
LOG("xfont_switch_output_to_buffer: 0x%x: %s",
rufl_fm_error->errnum,
rufl_fm_error->errmess);
free(buf);
return rufl_FONT_MANAGER_ERROR;
}
err = rufl_paint(font_family, font_style, font_size, string, len,
0, 0, rufl_BLEND_FONT);
if (err) {
/* reset font redirection - too bad if this fails */
xfont_switch_output_to_buffer(0, 0, 0);
free(buf);
return err;
}
rufl_fm_error = xfont_switch_output_to_buffer(0, 0, &buf_end);
if (rufl_fm_error) {
LOG("xfont_switch_output_to_buffer: 0x%x: %s",
rufl_fm_error->errnum,
rufl_fm_error->errmess);
free(buf);
return rufl_FONT_MANAGER_ERROR;
}
ep = (int *)(void *)buf_end;
/* Parse buffer, calling callbacks as required */
for (p = buf; p < ep;) {
if (p[0] != 2) {
LOG("Object type %d not known", p[0]);
break;
}
p = process_path(p, funcs, user);
/* Have the callbacks asked for us to stop? */
if (p == NULL)
break;
}
free(buf);
return rufl_OK;
}
|
