/[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 13 - (show annotations)
Mon Oct 11 18:19:09 1999 UTC (22 years, 3 months ago) by frodo
File MIME type: text/plain
File size: 8089 byte(s)
(Frodo) Current status images: Parsing kind of works, but the number of
        pixels does not match. What am I doing wrong?

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_mbm_jumptable_section(const psiconv_buffer buf,int lev,
27 psiconv_u32 off, int *length,
28 psiconv_mbm_jumptable_section *result)
29 {
30 int res = 0;
31 int len = 0;
32 psiconv_u32 listlen,temp;
33 int i;
34
35 psiconv_progress(lev+1,off+len,"Going to read the mbm jumptable section");
36 (*result) = psiconv_list_new(sizeof(psiconv_u32));
37
38 psiconv_progress(lev+2,off+len,"Going to read the list length");
39 listlen = psiconv_read_u32(buf,lev+2,off+len);
40 psiconv_debug(lev+2,off+len,"List length: %08x",listlen);
41 len += 4;
42
43 psiconv_progress(lev+2,off+len,"Going to read the list");
44 for (i = 0; i < listlen; i++) {
45 temp = psiconv_read_u32(buf,lev+2,off+len);
46 psiconv_list_add(*result,&temp);
47 psiconv_debug(lev+3,off+len,"Offset: %08x",temp);
48 len += 4;
49 }
50
51 if (length)
52 *length = len;
53
54 psiconv_progress(lev+1,off+len-1,"End of mbm jumptable section "
55 "(total length: %08x)", len);
56
57 return res;
58 }
59
60 int psiconv_parse_paint_data_section(const psiconv_buffer buf,int lev,
61 psiconv_u32 off, int *length,
62 psiconv_paint_data_section *result)
63 {
64 int res = 0;
65 int len = 0;
66 int read_err = 0;
67 psiconv_u32 size,offset,picsize,temp,datasize,pixelnr,datanr,linelen;
68 psiconv_u8 marker;
69 int i;
70
71 psiconv_progress(lev+1,off,"Going to read a paint data section");
72 (*result) = malloc(sizeof(**result));
73
74 psiconv_progress(lev+2,off+len,"Going to read section size");
75 size = psiconv_read_u32(buf,lev+2,off+len);
76 psiconv_debug(lev+2,off+len,"Section size: %08x",size);
77 len += 4;
78
79 psiconv_progress(lev+2,off+len,"Going to read pixel data offset");
80 offset = psiconv_read_u32(buf,lev+2,off+len);
81 if (offset != 0x28) {
82 psiconv_warn(lev+2,off+len,
83 "Paint data section data offset has unexpected value");
84 psiconv_debug(lev+2,off+len,
85 "Data offset: read %08x, expected %08x",offset,0x28);
86 res = -1;
87 }
88 len += 4;
89
90 psiconv_progress(lev+2,off+len,"Going to read picture X size");
91 (*result)->xsize = psiconv_read_u32(buf,lev+2,off+len);
92 psiconv_debug(lev+2,off+len,"Picture X size: %08x:",(*result)->xsize);
93 len += 4;
94
95 psiconv_progress(lev+2,off+len,"Going to read picture Y size");
96 (*result)->ysize = psiconv_read_u32(buf,lev+2,off+len);
97 psiconv_debug(lev+2,off+len,"Picture Y size: %08x:",(*result)->ysize);
98 len += 4;
99
100 picsize = (*result)->ysize * (*result)->xsize * 2;
101 linelen = (*result)->xsize;
102
103 psiconv_progress(lev+2,off+len,"Going to read 6 unused longs");
104 for (i = 0 ; i < 6; i++) {
105 temp = psiconv_read_u32(buf,lev+2,off+len);
106 if (temp != 0x00) {
107 psiconv_warn(lev+2,off+len,
108 "Paint data section prologue has unknown values");
109 psiconv_debug(lev+2,off+len,
110 "offset %02x: read %08x, expected %08x",i,temp,0x00);
111 res = -1;
112 }
113 len += 4;
114 }
115
116 (*result)->red = malloc(sizeof(float) * picsize);
117 (*result)->green = malloc(sizeof(float) * picsize);
118 (*result)->blue = malloc(sizeof(float) * picsize);
119 len = offset;
120 datasize = size - len;
121
122 psiconv_progress(lev+2,off+len,"Going to read the pixel data");
123 pixelnr = 0;
124 datanr = 0;
125 while ((datanr < datasize) && (pixelnr < picsize)) {
126 marker = psiconv_read_u8(buf,lev+3,off+len+datanr);
127 psiconv_debug(lev+3,off+len+datanr,
128 "Pixelnr %08x, Datanr %08x: Read marker %02x",
129 pixelnr,datanr,marker);
130 datanr ++;
131 if (marker >= 0x80) {
132 /* 0x100 - marker bytes of data follow */
133 if ((0x100 - marker + datanr > datasize) ||
134 ((0x100 - marker) * 4 + pixelnr > picsize)) {
135 psiconv_warn(lev+3,off+len+datanr,"Corrupted picture data");
136 psiconv_debug(lev+3,off+len+datanr,
137 "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
138 "Datanr: %08x, marker: %02x",picsize,datasize,pixelnr,
139 datanr,marker);
140 res = -1;
141 read_err = 1;
142 } else {
143 for (i = 0; i < 0x100-marker; i++) {
144 temp = psiconv_read_u8(buf,lev+3,off+len+datanr+i);
145 (*result)->red[pixelnr + i*4] =
146 (*result)->green[pixelnr + i*4] =
147 (*result)->blue[pixelnr + i*4] =
148 (temp & 0x03) * (1.0/3.0);
149 (*result)->red[pixelnr + i*4 + 1] =
150 (*result)->green[pixelnr + i*4 +1] =
151 (*result)->blue[pixelnr + i*4 + 1] =
152 ((temp >> 2) & 0x03) * (1.0/3.0);
153 (*result)->red[pixelnr + i*4 + 2] =
154 (*result)->green[pixelnr + i*4 +2] =
155 (*result)->blue[pixelnr + i*4 + 2] =
156 ((temp >> 4) & 0x03) * (1.0/3.0);
157 (*result)->red[pixelnr + i*4 + 3] =
158 (*result)->green[pixelnr + i*4 +3] =
159 (*result)->blue[pixelnr + i*4 + 3] =
160 ((temp >> 6) & 0x03) * (1.0/3.0);
161 }
162 }
163 pixelnr += (0x100 - marker) * 4;
164 datanr += (0x100 - marker);
165 } else { /* marker < 0x080 */
166 if ((datanr + 1 > datasize) ||
167 (marker * 4 + pixelnr > picsize)) {
168 psiconv_warn(lev+3,off+len+datanr,"Corrupted picture data");
169 psiconv_debug(lev+3,off+len+datanr,
170 "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
171 "Datanr: %08x, marker: %02x",picsize,datasize,pixelnr,
172 datanr,marker);
173 res = -1;
174 read_err = 1;
175 } else {
176 temp = psiconv_read_u8(buf,lev+3,off+len+datanr);
177 for (i = 0; i < marker; i++) {
178 (*result)->red[pixelnr + i*4] =
179 (*result)->green[pixelnr + i*4] =
180 (*result)->blue[pixelnr + i*4] =
181 (temp & 0x03) * (1.0/3.0);
182 (*result)->red[pixelnr + i*4 + 1] =
183 (*result)->green[pixelnr + i*4 +1] =
184 (*result)->blue[pixelnr + i*4 + 1] =
185 ((temp >> 2) & 0x03) * (1.0/3.0);
186 (*result)->red[pixelnr + i*4 + 2] =
187 (*result)->green[pixelnr + i*4 +2] =
188 (*result)->blue[pixelnr + i*4 + 2] =
189 ((temp >> 4) & 0x03) * (1.0/3.0);
190 (*result)->red[pixelnr + i*4 + 3] =
191 (*result)->green[pixelnr + i*4 +3] =
192 (*result)->blue[pixelnr + i*4 + 3] =
193 ((temp >> 6) & 0x03) * (1.0/3.0);
194 }
195 }
196 pixelnr += marker * 4;
197 datanr += 1;
198 }
199 }
200 if (!read_err && ((datanr != datasize) || (pixelnr != picsize))) {
201 psiconv_warn(lev+2,off+len,"Corrupted picture data!");
202 psiconv_debug(lev+3,off+len+datanr,
203 "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
204 "Datanr: %08x",picsize,datasize,pixelnr,datanr);
205 res = -1;
206 }
207
208 len += datanr;
209
210 if (length)
211 *length = len;
212
213 psiconv_progress(lev+1,off+len-1,"End of paint data section "
214 "(total length: %08x)", len);
215
216 return res;
217 }
218
219

frodo@frodo.looijaard.name
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