/[public]/psiconv/trunk/lib/psiconv/parse_image.c
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Contents of /psiconv/trunk/lib/psiconv/parse_image.c

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Revision 11 - (show annotations)
Mon Oct 11 15:17:17 1999 UTC (24 years, 5 months ago) by frodo
File MIME type: text/plain
File size: 6558 byte(s)
(Frodo) Now image stuff compiles.

Only psiconv_parse_paint_data_section is defined at this moment, it is not
yet called.

1 /*
2 parse_image.c - Part of psiconv, a PSION 5 file formats converter
3 Copyright (c) 1999 Frodo Looijaard <frodol@dds.nl>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20 #include "config.h"
21 #include <stdlib.h>
22
23 #include "data.h"
24 #include "parse_routines.h"
25
26 int psiconv_parse_paint_data_section(const psiconv_buffer buf,int lev,
27 psiconv_u32 off, int *length,
28 psiconv_paint_data_section *result)
29 {
30 int res = 0;
31 int len = 0;
32 psiconv_u32 size,offset,picsize,temp,datasize,pixelnr,datanr;
33 psiconv_u8 marker;
34 int i;
35
36 psiconv_progress(lev+1,off,"Going to read a paint data section");
37 (*result) = malloc(sizeof(**result));
38
39 psiconv_progress(lev+2,off+len,"Going to read section size");
40 size = psiconv_read_u32(buf,lev+2,off+len);
41 psiconv_debug(lev+2,off+len,"Section size: %08x",size);
42 len += 4;
43
44 psiconv_progress(lev+2,off+len,"Going to read pixel data offset");
45 offset = psiconv_read_u32(buf,lev+2,off+len);
46 if (size != 0x28) {
47 psiconv_warn(lev+2,off+len,
48 "Paint data section data offset has unexpected value");
49 psiconv_debug(lev+2,off+len,
50 "Data offset: read %08x, expected %08x",offset,0x28);
51 }
52 len += 4;
53
54 psiconv_progress(lev+2,off+len,"Going to read picture X size");
55 (*result)->xsize = psiconv_read_u32(buf,lev+2,off+len);
56 psiconv_debug(lev+2,off+len,"Picture X size: %08x:",(*result)->xsize);
57 len += 4;
58
59 psiconv_progress(lev+2,off+len,"Going to read picture Y size");
60 (*result)->ysize = psiconv_read_u32(buf,lev+2,off+len);
61 psiconv_debug(lev+2,off+len,"Picture Y size: %08x:",(*result)->ysize);
62 len += 4;
63
64 picsize = (*result)->ysize * (*result)->xsize;
65
66 psiconv_progress(lev+2,off+len,"Going to read 6 unused longs");
67 for (i = 0 ; i < 6; i++) {
68 temp = psiconv_read_u32(buf,lev+2,off+len);
69 if (temp != 0x00) {
70 psiconv_warn(lev+2,off+len,
71 "Paint data section prologue has unknown values");
72 psiconv_debug(lev+2,off+len,
73 "offset %02x: read %08x, expected %08x",i,temp,0x00);
74 }
75 len += 4;
76 }
77
78 (*result)->red = malloc(sizeof(float) * picsize);
79 (*result)->green = malloc(sizeof(float) * picsize);
80 (*result)->blue = malloc(sizeof(float) * picsize);
81 len = offset;
82 datasize = size - len;
83
84 psiconv_progress(lev+2,off+len,"Going to read the pixel data");
85 pixelnr = 0;
86 datanr = 0;
87 while ((datanr < datasize) && (pixelnr < picsize)) {
88 marker = psiconv_read_u8(buf,lev+3,off+len+datanr);
89 psiconv_debug(lev+3,off+len+datanr,
90 "Pixelnr %08x, Datanr %08x: Read marker %02x",
91 pixelnr,datanr,marker);
92 datanr ++;
93 if (marker >= 0x80) {
94 /* 0x100 - marker bytes of data follow */
95 if ((0x100 - marker + datanr > datasize) ||
96 ((0x100 - marker) * 4 + pixelnr > picsize)) {
97 psiconv_warn(lev+3,off+len+datanr,"Corrupted picture data");
98 psiconv_debug(lev+3,off+len+datanr,
99 "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
100 "Datanr: %08x, marker: %02x",picsize,datasize,pixelnr,
101 datanr,marker);
102 } else {
103 for (i = 0; i < 0x100-marker; i++) {
104 temp = psiconv_read_u8(buf,lev+3,off+len+datanr+i);
105 (*result)->red[pixelnr + i*4] =
106 (*result)->green[pixelnr + i*4] =
107 (*result)->blue[pixelnr + i*4] =
108 (temp & 0x03) * (1.0/3.0);
109 (*result)->red[pixelnr + i*4 + 1] =
110 (*result)->green[pixelnr + i*4 +1] =
111 (*result)->blue[pixelnr + i*4 + 1] =
112 ((temp >> 2) & 0x03) * (1.0/3.0);
113 (*result)->red[pixelnr + i*4 + 2] =
114 (*result)->green[pixelnr + i*4 +2] =
115 (*result)->blue[pixelnr + i*4 + 2] =
116 ((temp >> 4) & 0x03) * (1.0/3.0);
117 (*result)->red[pixelnr + i*4 + 3] =
118 (*result)->green[pixelnr + i*4 +3] =
119 (*result)->blue[pixelnr + i*4 + 3] =
120 ((temp >> 6) & 0x03) * (1.0/3.0);
121 }
122 }
123 pixelnr += (0x100 - marker) * 4;
124 datanr += (0x100 - marker);
125 } else { /* marker < 0x080 */
126 if ((datanr + 1 > datasize) ||
127 (marker * 4 + pixelnr > picsize)) {
128 psiconv_warn(lev+3,off+len+datanr,"Corrupted picture data");
129 psiconv_debug(lev+3,off+len+datanr,
130 "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
131 "Datanr: %08x, marker: %02x",picsize,datasize,pixelnr,
132 datanr,marker);
133 } else {
134 temp = psiconv_read_u8(buf,lev+3,off+len+datanr);
135 for (i = 0; i < marker; i++) {
136 (*result)->red[pixelnr + i*4] =
137 (*result)->green[pixelnr + i*4] =
138 (*result)->blue[pixelnr + i*4] =
139 (temp & 0x03) * (1.0/3.0);
140 (*result)->red[pixelnr + i*4 + 1] =
141 (*result)->green[pixelnr + i*4 +1] =
142 (*result)->blue[pixelnr + i*4 + 1] =
143 ((temp >> 2) & 0x03) * (1.0/3.0);
144 (*result)->red[pixelnr + i*4 + 2] =
145 (*result)->green[pixelnr + i*4 +2] =
146 (*result)->blue[pixelnr + i*4 + 2] =
147 ((temp >> 4) & 0x03) * (1.0/3.0);
148 (*result)->red[pixelnr + i*4 + 3] =
149 (*result)->green[pixelnr + i*4 +3] =
150 (*result)->blue[pixelnr + i*4 + 3] =
151 ((temp >> 6) & 0x03) * (1.0/3.0);
152 }
153 }
154 pixelnr += marker * 4;
155 datanr += 1;
156 }
157 }
158 len += datanr;
159
160 if (length)
161 *length = len;
162
163 psiconv_progress(lev+1,off+len-1,"End of paint data section "
164 "(total length: %08x", len);
165
166 return res;
167 }
168
169

frodo@frodo.looijaard.name
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