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
177
178
179
180
181
182
183
184
185
186
187
188
|
/*
* ***** 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@users.sourceforge.net)
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/imbuf/intern/dds/dds_api.cpp
* \ingroup imbdds
*/
extern "C" {
#include "BLI_utildefines.h"
}
#include <stddef.h>
#include <dds_api.h>
#include <Stream.h>
#include <DirectDrawSurface.h>
#include <FlipDXT.h>
#include <stdio.h> // printf
#include <fstream>
#if defined (WIN32)
#include "utfconv.h"
#endif
extern "C" {
#include "imbuf.h"
#include "IMB_imbuf_types.h"
#include "IMB_imbuf.h"
#include "IMB_allocimbuf.h"
#include "IMB_colormanagement.h"
#include "IMB_colormanagement_intern.h"
int imb_save_dds(struct ImBuf *ibuf, const 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;
#if defined (WIN32)
wchar_t *wname = alloc_utf16_from_8(name, 0);
fildes.open(wname);
free(wname);
#else
fildes.open(name);
#endif
/* write header */
fildes << "DDS ";
fildes.close();
return(1);
}
int imb_is_a_dds(const 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(const unsigned char *mem, size_t size, int flags, char colorspace[IM_MAX_SPACE])
{
struct ImBuf *ibuf = NULL;
DirectDrawSurface dds((unsigned char *)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;
/* OCIO_TODO: never was able to save DDS, so can't test loading
* but profile used to be set to sRGB and can't see rect_float here, so
* default byte space should work fine
*/
colorspace_set_default_role(colorspace, IM_MAX_SPACE, COLOR_ROLE_DEFAULT_BYTE);
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 */
dds.mipmap(&img, 0, 0); /* load first face, first mipmap */
pixels = img.pixels();
numpixels = dds.width() * dds.height();
bits_per_pixel = 24;
if (img.format() == Image::Format_ARGB) {
/* check that there is effectively an alpha channel */
for (unsigned int i = 0; i < numpixels; i++) {
pixel = pixels[i];
if (pixel.a != 255) {
bits_per_pixel = 32;
break;
}
}
}
ibuf = IMB_allocImBuf(dds.width(), dds.height(), bits_per_pixel, 0);
if (ibuf == 0) return(0); /* memory allocation failed */
ibuf->ftype = IMB_FTYPE_DDS;
ibuf->dds_data.fourcc = dds.fourCC();
ibuf->dds_data.nummipmaps = dds.mipmapCount();
if ((flags & IB_test) == 0) {
if (!imb_addrectImBuf(ibuf)) return(ibuf);
if (ibuf->rect == 0) return(ibuf);
rect = ibuf->rect;
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 (dds.hasAlpha())
cp[3] = pixel.a; /* set A component of col */
rect[i] = col;
}
if (ibuf->dds_data.fourcc != FOURCC_DDS) {
ibuf->dds_data.data = (unsigned char *)dds.readData(ibuf->dds_data.size);
/* flip compressed texture */
FlipDXTCImage(dds.width(), dds.height(), dds.mipmapCount(), dds.fourCC(), ibuf->dds_data.data);
}
else {
ibuf->dds_data.data = NULL;
ibuf->dds_data.size = 0;
}
/* flip uncompressed texture */
IMB_flipy(ibuf);
}
return(ibuf);
}
} // extern "C"
|
