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
|
/**
* $Id$
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contributors: Amorilia (amorilia@gamebox.net)
*
* ***** END GPL LICENSE BLOCK *****
*/
#include <stddef.h>
#include <dds_api.h>
#include <Stream.h>
#include <DirectDrawSurface.h>
#include <stdio.h> // printf
#include <fstream>
extern "C" {
#include "imbuf.h"
#include "IMB_imbuf_types.h"
#include "IMB_imbuf.h"
#include "IMB_allocimbuf.h"
int imb_save_dds(struct ImBuf * ibuf, char *name, int flags)
{
return(0); /* todo: finish this function */
/* check image buffer */
if (ibuf == 0) return (0);
if (ibuf->rect == 0) return (0);
/* open file for writing */
std::ofstream fildes(name);
/* write header */
fildes << "DDS ";
fildes.close();
return(1);
}
int imb_is_a_dds(unsigned char *mem) // note: use at most first 32 bytes
{
/* heuristic check to see if mem contains a DDS file */
/* header.fourcc == FOURCC_DDS */
if ((mem[0] != 'D') || (mem[1] != 'D') || (mem[2] != 'S') || (mem[3] != ' ')) return(0);
/* header.size == 124 */
if ((mem[4] != 124) || mem[5] || mem[6] || mem[7]) return(0);
return(1);
}
struct ImBuf *imb_load_dds(unsigned char *mem, size_t size, int flags)
{
struct ImBuf * ibuf = 0;
DirectDrawSurface dds(mem, size); /* reads header */
unsigned char bits_per_pixel;
unsigned int *rect;
Image img;
unsigned int numpixels = 0;
int col;
unsigned char *cp = (unsigned char *) &col;
Color32 pixel;
Color32 *pixels = 0;
if(!imb_is_a_dds(mem))
return (0);
/* check if DDS is valid and supported */
if (!dds.isValid()) {
/* no need to print error here, just testing if it is a DDS */
if(flags & IB_test)
return (0);
printf("DDS: not valid; header follows\n");
dds.printInfo();
return(0);
}
if (!dds.isSupported()) {
printf("DDS: format not supported\n");
return(0);
}
if ((dds.width() > 65535) || (dds.height() > 65535)) {
printf("DDS: dimensions too large\n");
return(0);
}
/* convert DDS into ImBuf */
// TODO use the image RGB or RGBA tag to determine the bits per pixel
if (dds.hasAlpha()) bits_per_pixel = 32;
else bits_per_pixel = 24;
ibuf = IMB_allocImBuf(dds.width(), dds.height(), bits_per_pixel, 0, 0);
if (ibuf == 0) return(0); /* memory allocation failed */
ibuf->ftype = DDS;
ibuf->profile = IB_PROFILE_SRGB;
if ((flags & IB_test) == 0) {
if (!imb_addrectImBuf(ibuf)) return(ibuf);
if (ibuf->rect == 0) return(ibuf);
rect = ibuf->rect;
dds.mipmap(&img, 0, 0); /* load first face, first mipmap */
pixels = img.pixels();
numpixels = dds.width() * dds.height();
cp[3] = 0xff; /* default alpha if alpha channel is not present */
for (unsigned int i = 0; i < numpixels; i++) {
pixel = pixels[i];
cp[0] = pixel.r; /* set R component of col */
cp[1] = pixel.g; /* set G component of col */
cp[2] = pixel.b; /* set B component of col */
if (bits_per_pixel == 32)
cp[3] = pixel.a; /* set A component of col */
rect[i] = col;
}
IMB_flipy(ibuf);
}
return(ibuf);
}
} // extern "C"
|
