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Contents of /psiconv/trunk/lib/psiconv/parse_image.c

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Revision 15 - (show annotations)
Wed Oct 13 15:02:21 1999 UTC (24 years, 5 months ago) by frodo
File MIME type: text/plain
File size: 8710 byte(s)
(Frodo) Latest parse_paint_section changes

It still is not perfect, but it is certainly coming along

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 unknown longs");
104 for (i = 0 ; i < 6; i++) {
105 temp = psiconv_read_u32(buf,lev+2,off+len);
106 if (temp != (i==2?0x02:i==5?0x01:0x00)) {
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,
111 i==2?0x02:i==5?0x01:0x00);
112 res = -1;
113 }
114 len += 4;
115 }
116
117 (*result)->red = malloc(sizeof(float) * picsize);
118 (*result)->green = malloc(sizeof(float) * picsize);
119 (*result)->blue = malloc(sizeof(float) * picsize);
120 len = offset;
121 datasize = size - len;
122
123 psiconv_progress(lev+2,off+len,"Going to read the pixel data");
124 pixelnr = 0;
125 datanr = 0;
126 while ((datanr < datasize) && (pixelnr < picsize)) {
127 marker = psiconv_read_u8(buf,lev+3,off+len+datanr);
128 psiconv_debug(lev+3,off+len+datanr,
129 "Pixelnr %08x, Datanr %08x: Read marker %02x",
130 pixelnr,datanr,marker);
131 datanr ++;
132 if (marker >= 0x80) {
133 /* 0x100 - marker bytes of data follow */
134 for (i = 0; i < 0x100-marker; i++,datanr++) {
135 if ((picsize == pixelnr) || (datasize == datanr)) {
136 psiconv_warn(lev+3,off+len+datanr,"Corrupted picture data");
137 psiconv_debug(lev+3,off+len+datanr,
138 "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
139 "Datanr: %08x, marker: %02x",picsize,datasize,pixelnr,
140 datanr,marker);
141 read_err = 1;
142 res = -1;
143 break;
144 }
145 temp = psiconv_read_u8(buf,lev+3,off+len+datanr);
146 (*result)->red[pixelnr] =
147 (*result)->green[pixelnr] =
148 (*result)->blue[pixelnr] =
149 (temp & 0x03) * (1.0/3.0);
150 pixelnr ++;
151 if (pixelnr % linelen == 0)
152 continue;
153 (*result)->red[pixelnr] =
154 (*result)->green[pixelnr] =
155 (*result)->blue[pixelnr] =
156 ((temp >> 2) & 0x03) * (1.0/3.0);
157 pixelnr ++;
158 if (pixelnr % linelen == 0)
159 continue;
160 (*result)->red[pixelnr] =
161 (*result)->green[pixelnr] =
162 (*result)->blue[pixelnr] =
163 ((temp >> 4) & 0x03) * (1.0/3.0);
164 pixelnr ++;
165 if (pixelnr % linelen == 0)
166 continue;
167 (*result)->red[pixelnr] =
168 (*result)->green[pixelnr] =
169 (*result)->blue[pixelnr] =
170 ((temp >> 6) & 0x03) * (1.0/3.0);
171 }
172 } else { /* marker < 0x080 */
173 if (datasize == datanr) {
174 psiconv_warn(lev+3,off+len+datanr,"Corrupted picture data");
175 psiconv_debug(lev+3,off+len+datanr,
176 "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
177 "Datanr: %08x, marker: %02x",picsize,datasize,pixelnr,
178 datanr,marker);
179 read_err = 1;
180 res = -1;
181 } else {
182 temp = psiconv_read_u8(buf,lev+3,off+len+datanr);
183 for (i = 0; i <= marker; i++) {
184 if (picsize == pixelnr) {
185 psiconv_warn(lev+3,off+len+datanr,"Corrupted picture data");
186 psiconv_debug(lev+3,off+len+datanr,
187 "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
188 "Datanr: %08x, marker: %02x",picsize,datasize,pixelnr,
189 datanr,marker);
190 read_err = 1;
191 res = -1;
192 break;
193 }
194 (*result)->red[pixelnr] =
195 (*result)->green[pixelnr] =
196 (*result)->blue[pixelnr] =
197 (temp & 0x03) * (1.0/3.0);
198 pixelnr ++;
199 if (pixelnr % linelen == 0)
200 continue;
201 (*result)->red[pixelnr] =
202 (*result)->green[pixelnr] =
203 (*result)->blue[pixelnr] =
204 ((temp >> 2) & 0x03) * (1.0/3.0);
205 pixelnr ++;
206 if (pixelnr % linelen == 0)
207 continue;
208 (*result)->red[pixelnr] =
209 (*result)->green[pixelnr] =
210 (*result)->blue[pixelnr] =
211 ((temp >> 4) & 0x03) * (1.0/3.0);
212 pixelnr ++;
213 if (pixelnr % linelen == 0)
214 continue;
215 (*result)->red[pixelnr] =
216 (*result)->green[pixelnr] =
217 (*result)->blue[pixelnr] =
218 ((temp >> 6) & 0x03) * (1.0/3.0);
219 pixelnr ++;
220 }
221 }
222 datanr += 1;
223 }
224 }
225 if (!read_err && ((datanr != datasize) || (pixelnr != picsize))) {
226 psiconv_warn(lev+2,off+len,"Corrupted picture data!");
227 psiconv_debug(lev+3,off+len+datanr,
228 "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
229 "Datanr: %08x",picsize,datasize,pixelnr,datanr);
230 res = -1;
231 }
232
233 len += datanr;
234
235 if (length)
236 *length = len;
237
238 psiconv_progress(lev+1,off+len-1,"End of paint data section "
239 "(total length: %08x)", len);
240
241 return res;
242 }
243
244

frodo@frodo.looijaard.name
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