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
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/**
* $Id$
*
* ***** 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.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
#include "BLI_blenlib.h"
#include "imbuf.h"
#include "imbuf_patch.h"
#include "IMB_imbuf_types.h"
#include "IMB_imbuf.h"
#include "IMB_allocimbuf.h"
#include "IMB_cmap.h"
#include "IMB_bmp.h"
/* some code copied from article on microsoft.com, copied
here for enhanced BMP support in the future
http://www.microsoft.com/msj/defaultframe.asp?page=/msj/0197/mfcp1/mfcp1.htm&nav=/msj/0197/newnav.htm
*/
typedef struct BMPINFOHEADER{
unsigned int biSize;
unsigned int biWidth;
unsigned int biHeight;
unsigned short biPlanes;
unsigned short biBitCount;
unsigned int biCompression;
unsigned int biSizeImage;
unsigned int biXPelsPerMeter;
unsigned int biYPelsPerMeter;
unsigned int biClrUsed;
unsigned int biClrImportant;
} BMPINFOHEADER;
typedef struct BMPHEADER {
unsigned short biType;
unsigned int biSize;
unsigned short biRes1;
unsigned short biRes2;
unsigned int biOffBits;
} BMPHEADER;
#define BMP_FILEHEADER_SIZE 14
static int checkbmp(unsigned char *mem)
{
int ret_val = 0;
BMPINFOHEADER bmi;
unsigned int u;
if (mem) {
if ((mem[0] == 'B') && (mem[1] == 'M')) {
/* skip fileheader */
mem += BMP_FILEHEADER_SIZE;
} else {
}
/* for systems where an int needs to be 4 bytes aligned */
memcpy(&bmi, mem, sizeof(bmi));
u = LITTLE_LONG(bmi.biSize);
/* we only support uncompressed 24 or 32 bits images for now */
if (u >= sizeof(BMPINFOHEADER)) {
if ((bmi.biCompression == 0) && (bmi.biClrUsed == 0)) {
u = LITTLE_SHORT(bmi.biBitCount);
if (u >= 16) {
ret_val = 1;
}
}
}
}
return(ret_val);
}
int imb_is_a_bmp(void *buf) {
return checkbmp(buf);
}
struct ImBuf *imb_bmp_decode(unsigned char *mem, int size, int flags)
{
struct ImBuf *ibuf = 0;
BMPINFOHEADER bmi;
int x, y, depth, skip, i;
unsigned char *bmp, *rect;
unsigned short col;
if (checkbmp(mem) == 0) return(0);
if ((mem[0] == 'B') && (mem[1] == 'M')) {
/* skip fileheader */
mem += BMP_FILEHEADER_SIZE;
}
/* for systems where an int needs to be 4 bytes aligned */
memcpy(&bmi, mem, sizeof(bmi));
skip = LITTLE_LONG(bmi.biSize);
x = LITTLE_LONG(bmi.biWidth);
y = LITTLE_LONG(bmi.biHeight);
depth = LITTLE_SHORT(bmi.biBitCount);
/* printf("skip: %d, x: %d y: %d, depth: %d (%x)\n", skip, x, y,
depth, bmi.biBitCount); */
/* printf("skip: %d, x: %d y: %d, depth: %d (%x)\n", skip, x, y,
depth, bmi.biBitCount); */
if (flags & IB_test) {
ibuf = IMB_allocImBuf(x, y, depth, 0, 0);
} else {
ibuf = IMB_allocImBuf(x, y, depth, IB_rect, 0);
bmp = mem + skip;
rect = (unsigned char *) ibuf->rect;
if (depth == 16) {
for (i = x * y; i > 0; i--) {
col = bmp[0] + (bmp[1] << 8);
rect[0] = ((col >> 10) & 0x1f) << 3;
rect[1] = ((col >> 5) & 0x1f) << 3;
rect[2] = ((col >> 0) & 0x1f) << 3;
rect[3] = 255;
rect += 4; bmp += 2;
}
} else if (depth == 24) {
for (i = y; i > 0; i--) {
int j;
for (j = x ; j > 0; j--) {
rect[0] = bmp[2];
rect[1] = bmp[1];
rect[2] = bmp[0];
rect[3] = 255;
rect += 4; bmp += 3;
}
/* for 24-bit images, rows are padded to multiples of 4 */
bmp += x % 4;
}
} else if (depth == 32) {
for (i = x * y; i > 0; i--) {
rect[0] = bmp[2];
rect[1] = bmp[1];
rect[2] = bmp[0];
rect[3] = bmp[3];
rect += 4; bmp += 4;
}
}
}
if (ibuf) {
ibuf->ftype = BMP;
ibuf->profile = IB_PROFILE_SRGB;
}
return(ibuf);
}
/* Couple of helper functions for writing our data */
static int putIntLSB(unsigned int ui,FILE *ofile) {
putc((ui>>0)&0xFF,ofile);
putc((ui>>8)&0xFF,ofile);
putc((ui>>16)&0xFF,ofile);
return putc((ui>>24)&0xFF,ofile);
}
static int putShortLSB(unsigned short us,FILE *ofile) {
putc((us>>0)&0xFF,ofile);
return putc((us>>8)&0xFF,ofile);
}
/* Found write info at http://users.ece.gatech.edu/~slabaugh/personal/c/bitmapUnix.c */
short imb_savebmp(struct ImBuf *ibuf, char *name, int flags) {
BMPINFOHEADER infoheader;
int bytesize, extrabytes, x, y, t, ptr;
uchar *data;
FILE *ofile;
extrabytes = (4 - ibuf->x*3 % 4) % 4;
bytesize = (ibuf->x * 3 + extrabytes) * ibuf->y;
data = (uchar *) ibuf->rect;
ofile = fopen(name,"wb");
if (!ofile) return 0;
putShortLSB(19778,ofile); /* "BM" */
putIntLSB(0,ofile); /* This can be 0 for BI_RGB bitmaps */
putShortLSB(0,ofile); /* Res1 */
putShortLSB(0,ofile); /* Res2 */
putIntLSB(BMP_FILEHEADER_SIZE + sizeof(infoheader),ofile);
putIntLSB(sizeof(infoheader),ofile);
putIntLSB(ibuf->x,ofile);
putIntLSB(ibuf->y,ofile);
putShortLSB(1,ofile);
putShortLSB(24,ofile);
putIntLSB(0,ofile);
putIntLSB(bytesize + BMP_FILEHEADER_SIZE + sizeof(infoheader),ofile);
putIntLSB(0,ofile);
putIntLSB(0,ofile);
putIntLSB(0,ofile);
putIntLSB(0,ofile);
/* Need to write out padded image data in bgr format */
for (y=0;y<ibuf->y;y++) {
for (x=0;x<ibuf->x;x++) {
ptr=(x + y * ibuf->x) * 4;
if (putc(data[ptr+2],ofile) == EOF) return 0;
if (putc(data[ptr+1],ofile) == EOF) return 0;
if (putc(data[ptr],ofile) == EOF) return 0;
}
/* add padding here */
for (t=0;t<extrabytes;t++) if (putc(0,ofile) == EOF) return 0;
}
if (ofile) {
fflush(ofile);
fclose(ofile);
}
return 1;
}
|
