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
|
/*
* Text layout and parsing functions
*
* Copyright (C) 2019 Patrick McDermott
*
* This file is part of fbcon2png.
*
* fbcon2png 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
* (at your option) any later version.
*
* fbcon2png 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 fbcon2png. If not, see <http://www.gnu.org/licenses/>.
*/
#include "text.h"
#include <stdlib.h>
#include <string.h>
#include <png.h>
#include "font.h"
#include "sgr.h"
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
struct text {
const char *string;
size_t width;
size_t height;
};
struct text *
text_new(const char *string)
{
struct text *text;
size_t width;
int eol;
if (!string) {
return NULL;
}
text = calloc(1, sizeof(*text));
if (!text) {
return NULL;
}
text->string = string;
width = 0;
eol = 0;
while (string && *string) {
if (*string == 0x1B && *(string + 1) == '[') { /* CSI */
string += 2;
for (; *string >= 0x30 && *string <= 0x3F; ++string);
for (; *string >= 0x20 && *string <= 0x2F; ++string);
if (*string >= 0x40 && *string <= 0x7E) {
++string;
}
eol = 0;
} else if (*string == '\n') {
text->width = MAX(text->width, width);
width = 0;
++text->height;
++string;
eol = 1;
} else {
++width;
++string;
eol = 0;
}
}
if (!eol) {
++text->height;
}
return text;
}
size_t
text_get_width(struct text *text)
{
return text->width;
}
size_t
text_get_height(struct text *text)
{
return text->height;
}
size_t
text_set_width(struct text *text, size_t width)
{
return text->width = MAX(text->width, width);
}
size_t
text_set_height(struct text *text, size_t height)
{
return text->height = MAX(text->height, height);
}
void
text_render(struct text *text, struct font *font, png_bytepp rows)
{
char *string_start;
char *string;
size_t row;
size_t col;
char *parameter;
png_color fg = {170, 170, 170};
png_color bg = { 0, 0, 0};
string_start = calloc(strlen(text->string) + 1, sizeof(*text->string));
if (!string_start) {
return;
}
memcpy(string_start, text->string, strlen(text->string) + 1);
string = string_start;
row = 0;
col = 0;
while (string && *string) {
if (*string == 0x1B && *(string + 1) == '[') { /* CSI */
string += 2;
parameter = string;
for (; *string >= 0x30 && *string <= 0x3F; ++string);
for (; *string >= 0x20 && *string <= 0x2F; ++string);
if (*string >= 0x40 && *string <= 0x7E) {
if (*string == 'm') {
*string = '\0';
sgr(parameter, &fg, &bg);
}
++string;
}
} else if (*string == '\n') {
for (; col < text->width; ++col) {
font_render(font, &fg,&bg, ' ', rows, row, col);
}
col = 0;
++row;
++string;
} else {
font_render(font, &fg, &bg, *string, rows, row, col);
++col;
++string;
}
}
for (; row < text->height; ++row) {
for (; col < text->width; ++col) {
font_render(font, &fg, &bg, ' ', rows, row, col);
}
col = 0;
}
free(string_start);
}
struct text *
text_destroy(struct text **text_p)
{
struct text *text;
text = *text_p;
free(text);
return text = NULL;
}
|
