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
|
/**
* @file
* @ingroup common_render
* @brief @ref textspan_size
*/
/*************************************************************************
* Copyright (c) 2011 AT&T Intellectual Property
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-v10.html
*
* Contributors: Details at https://graphviz.org
*************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <cdt/cdt.h>
#include <common/render.h>
#include <common/textspan_lut.h>
#include <util/alloc.h>
#include <util/strcasecmp.h>
/* estimate_textspan_size:
* Estimate size of textspan, for given face and size, in points.
*/
static void
estimate_textspan_size(textspan_t * span, char **fontpath)
{
double fontsize;
int flags = span->font->flags;
bool bold = (flags & HTML_BF) != 0;
bool italic = (flags & HTML_IF) != 0;
fontsize = span->font->size;
span->size.x = 0.0;
span->size.y = fontsize * LINESPACING;
span->yoffset_layout = 0.0;
span->yoffset_centerline = 0.1 * fontsize;
span->layout = NULL;
span->free_layout = NULL;
span->size.x = fontsize * estimate_text_width_1pt(span->font->name, span->str, bold, italic);
if (fontpath)
*fontpath = "[internal hard-coded]";
}
/*
* This table maps standard Postscript font names to URW Type 1 fonts.
*/
static PostscriptAlias postscript_alias[] = {
#include "ps_font_equiv.h"
};
static int fontcmpf(const void *a, const void *b)
{
return strcasecmp(a, ((const PostscriptAlias*)b)->name);
}
static PostscriptAlias* translate_postscript_fontname(char* fontname)
{
return bsearch(fontname, postscript_alias,
sizeof(postscript_alias) / sizeof(PostscriptAlias),
sizeof(PostscriptAlias), fontcmpf);
}
pointf textspan_size(GVC_t *gvc, textspan_t * span)
/// Estimates size of a textspan, in points.
{
char **fpp = NULL, *fontpath = NULL;
textfont_t *font;
assert(span->font);
font = span->font;
assert(font->name);
/* only need to find alias once per font, since they are unique in dict */
if (! font->postscript_alias)
font->postscript_alias = translate_postscript_fontname(font->name);
if (Verbose && emit_once(font->name))
fpp = &fontpath;
if (! gvtextlayout(gvc, span, fpp))
estimate_textspan_size(span, fpp);
if (fpp) {
if (fontpath)
fprintf(stderr, "fontname: \"%s\" resolved to: %s\n",
font->name, fontpath);
else
fprintf(stderr, "fontname: unable to resolve \"%s\"\n", font->name);
}
return span->size;
}
static void *textfont_makef(void *obj, Dtdisc_t *disc) {
(void)disc;
textfont_t *f1 = obj;
textfont_t *f2 = gv_alloc(sizeof(textfont_t));
/* key */
if (f1->name) f2->name = gv_strdup(f1->name);
if (f1->color) f2->color = gv_strdup(f1->color);
f2->flags = f1->flags;
f2->size = f1->size;
/* non key */
f2->postscript_alias = f1->postscript_alias;
return f2;
}
static void textfont_freef(void *obj) {
textfont_t *f = obj;
free(f->name);
free(f->color);
free(f);
}
static int textfont_comparf(void *key1, void *key2) {
int rc;
textfont_t *f1 = key1, *f2 = key2;
if (f1->name || f2->name) {
if (! f1->name) return -1;
if (! f2->name) return 1;
rc = strcmp(f1->name, f2->name);
if (rc) return rc;
}
if (f1->color || f2->color) {
if (! f1->color) return -1;
if (! f2->color) return 1;
rc = strcmp(f1->color, f2->color);
if (rc) return rc;
}
if (f1->flags < f2->flags) return -1;
if (f1->flags > f2->flags) return 1;
if (f1->size < f2->size) return -1;
if (f1->size > f2->size) return 1;
return 0;
}
void textfont_dict_open(GVC_t *gvc) {
DTDISC(&gvc->textfont_disc, 0, sizeof(textfont_t), -1, textfont_makef, textfont_freef, textfont_comparf);
gvc->textfont_dt = dtopen(&(gvc->textfont_disc), Dtoset);
}
void textfont_dict_close(GVC_t *gvc)
{
dtclose(gvc->textfont_dt);
}
|
