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
|
//
// "$Id$"
//
// Fl_XPM_Image routines.
//
// Copyright 1997-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
// Contents:
//
//
//
// Include necessary header files...
//
#include <FL/Fl.H>
#include <FL/Fl_XPM_Image.H>
#include <stdio.h>
#include <stdlib.h>
#include <FL/fl_utf8.h>
#include "flstring.h"
//
// 'hexdigit()' - Convert a hex digit to an integer.
//
static int hexdigit(int x) { // I - Hex digit...
if (isdigit(x)) return x-'0';
if (isupper(x)) return x-'A'+10;
if (islower(x)) return x-'a'+10;
return 20;
}
#define MAXSIZE 2048
#define INITIALLINES 256
/**
The constructor loads the XPM image from the name filename.
<P>The destructor free all memory and server resources that are used by
the image.
*/
Fl_XPM_Image::Fl_XPM_Image(const char *name) : Fl_Pixmap((char *const*)0) {
FILE *f;
if ((f = fl_fopen(name, "rb")) == NULL) return;
// read all the c-strings out of the file:
char** new_data = new char *[INITIALLINES];
char** temp_data;
int malloc_size = INITIALLINES;
char buffer[MAXSIZE+20];
int i = 0;
int W,H,ncolors,chars_per_pixel;
while (fgets(buffer,MAXSIZE+20,f)) {
if (buffer[0] != '\"') continue;
char *myp = buffer;
char *q = buffer+1;
while (*q != '\"' && myp < buffer+MAXSIZE) {
if (*q == '\\') switch (*++q) {
case '\r':
case '\n':
if (!fgets(q,(int) (buffer+MAXSIZE+20-q),f)) { /* no problem if we hit EOF */ } break;
case 0:
break;
case 'x': {
q++;
int n = 0;
for (int x = 0; x < 2; x++) {
int xd = hexdigit(*q);
if (xd > 15) break;
n = (n<<4)+xd;
q++;
}
*myp++ = n;
} break;
default: {
int c = *q++;
if (c>='0' && c<='7') {
c -= '0';
for (int x=0; x<2; x++) {
int xd = hexdigit(*q);
if (xd>7) break;
c = (c<<3)+xd;
q++;
}
}
*myp++ = c;
} break;
} else {
*myp++ = *q++;
}
}
*myp++ = 0;
if (i >= malloc_size) {
temp_data = new char *[malloc_size + INITIALLINES];
memcpy(temp_data, new_data, sizeof(char *) * malloc_size);
delete[] new_data;
new_data = temp_data;
malloc_size += INITIALLINES;
}
// first line has 4 ints: width, height, ncolors, chars_per_pixel
// followed by color segment:
// if ncolors < 0 this is FLTK (non standard) compressed colormap - all colors coded in single line of 4*ncolors bytes
// otherwise - ncolor lines of at least chars_per_pixel bytes
// followed by pic segment: H lines of at least chars_per_pixel*W bytes
// next line: would have loved to use measure_pixmap, but it doesn't return all the data!
if ((!i) && (sscanf(buffer,"%d%d%d%d", &W, &H, &ncolors, &chars_per_pixel) < 4)) goto bad_data; // first line
else if ((i > (ncolors<0?1:ncolors)) && (myp-buffer-1<W*chars_per_pixel)) goto bad_data; // pic segment
else if (myp-buffer-1<(ncolors<0?-ncolors*4:chars_per_pixel)) goto bad_data; // color segment
new_data[i] = new char[myp-buffer+1];
memcpy(new_data[i], buffer,myp-buffer);
new_data[i][myp-buffer] = 0;
i++;
}
fclose(f);
f = NULL;
if ((!i) || (i<1+(ncolors<0?1:ncolors)+H)) goto bad_data;
data((const char **)new_data, i);
alloc_data = 1;
measure();
return;
// dealloc and close as needed when bad data was found
bad_data:
while (i > 0) delete[] new_data[--i];
delete[] new_data;
if (f) fclose(f);
}
//
// End of "$Id$".
//
|
