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
|
// Oliver Eiden <[email protected]>
// 23.3.99
// changed the mapping from 3-3-2 decoded pixels to 8-8-8 decoded true-color pixels
// now it uses the same mapping as xv, this leads to better visual results
// Patch merged in HEAD by Chris Spiegel <[email protected]>
// This library is distributed under the conditions of the GNU LGPL.
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <tqimage.h>
#include <kdelibs_export.h>
#include "xview.h"
#define BUFSIZE 1024
static const int b_255_3[]= {0,85,170,255}, // index*255/3
rg_255_7[]={0,36,72,109,145,182,218,255}; // index *255/7
KDE_EXPORT void kimgio_xv_read( TQImageIO *_imageio )
{
int x=-1;
int y=-1;
int maxval=-1;
TQIODevice *iodev = _imageio->ioDevice();
char str[ BUFSIZE ];
// magic number must be "P7 332"
iodev->readLine( str, BUFSIZE );
if (strncmp(str,"P7 332",6)) return;
// next line #XVVERSION
iodev->readLine( str, BUFSIZE );
if (strncmp(str, "#XVVERSION", 10))
return;
// now it gets interesting, #BUILTIN means we are out.
// if IMGINFO comes, we are happy!
iodev->readLine( str, BUFSIZE );
if (strncmp(str, "#IMGINFO:", 9))
return;
// after this an #END_OF_COMMENTS signals everything to be ok!
iodev->readLine( str, BUFSIZE );
if (strncmp(str, "#END_OF", 7))
return;
// now a last line with width, height, maxval which is
// supposed to be 255
iodev->readLine( str, BUFSIZE );
sscanf(str, "%d %d %d", &x, &y, &maxval);
if (maxval != 255) return;
int blocksize = x*y;
if(x < 0 || y < 0 || blocksize < x || blocksize < y)
return;
// now follows a binary block of x*y bytes.
char *block = (char*) malloc(blocksize);
if(!block)
return;
if (iodev->readBlock(block, blocksize) != blocksize )
{
return;
}
// Create the image
TQImage image( x, y, 8, maxval + 1, TQImage::BigEndian );
if( image.isNull()) {
free(block);
return;
}
// how do the color handling? they are absolute 24bpp
// or at least can be calculated as such.
int r,g,b;
for ( int j = 0; j < 256; j++ )
{
r = rg_255_7[((j >> 5) & 0x07)];
g = rg_255_7[((j >> 2) & 0x07)];
b = b_255_3[((j >> 0) & 0x03)];
image.setColor( j, tqRgb( r, g, b ) );
}
for ( int py = 0; py < y; py++ )
{
uchar *data = image.scanLine( py );
memcpy( data, block + py * x, x );
}
_imageio->setImage( image );
_imageio->setqStatus( 0 );
free(block);
return;
}
KDE_EXPORT void kimgio_xv_write( TQImageIO *imageio )
{
TQIODevice& f = *( imageio->ioDevice() );
// Removed "f.open(...)" and "f.close()" (tanghus)
const TQImage& image = imageio->image();
int w = image.width(), h = image.height();
char str[ 1024 ];
// magic number must be "P7 332"
f.writeBlock( "P7 332\n", 7 );
// next line #XVVERSION
f.writeBlock( "#XVVERSION:\n", 12 );
// now it gets interesting, #BUILTIN means we are out.
// if IMGINFO comes, we are happy!
f.writeBlock( "#IMGINFO:\n", 10 );
// after this an #END_OF_COMMENTS signals everything to be ok!
f.writeBlock( "#END_OF_COMMENTS:\n", 18 );
// now a last line with width, height, maxval which is supposed to be 255
sprintf( str, "%i %i 255\n", w, h );
f.writeBlock( str, strlen( str ) );
if ( image.depth() == 1 )
{
image.convertDepth( 8 );
}
uchar* buffer = new uchar[ w ];
for ( int py = 0; py < h; py++ )
{
uchar *data = const_cast<TQImage&>(image).scanLine( py );
for ( int px = 0; px < w; px++ )
{
int r, g, b;
if ( image.depth() == 32 )
{
QRgb *data32 = (QRgb*) data;
r = tqRed( *data32 ) >> 5;
g = tqGreen( *data32 ) >> 5;
b = tqBlue( *data32 ) >> 6;
data += sizeof( QRgb );
}
else
{
QRgb color = image.color( *data );
r = tqRed( color ) >> 5;
g = tqGreen( color ) >> 5;
b = tqBlue( color ) >> 6;
data++;
}
buffer[ px ] = ( r << 5 ) | ( g << 2 ) | b;
}
f.writeBlock( (const char*)buffer, w );
}
delete[] buffer;
imageio->setqStatus( 0 );
}
|
