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

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Revision 13 - (hide annotations)
Mon Oct 11 18:19:09 1999 UTC (24 years, 5 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 frodo 10 /*
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 frodo 12 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 frodo 13 "(total length: %08x)", len);
56 frodo 12
57     return res;
58     }
59    
60 frodo 10 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 frodo 12 int read_err = 0;
67 frodo 13 psiconv_u32 size,offset,picsize,temp,datasize,pixelnr,datanr,linelen;
68 frodo 11 psiconv_u8 marker;
69     int i;
70 frodo 10
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 frodo 13 if (offset != 0x28) {
82 frodo 10 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 frodo 12 res = -1;
87 frodo 10 }
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 frodo 13 picsize = (*result)->ysize * (*result)->xsize * 2;
101     linelen = (*result)->xsize;
102 frodo 10
103 frodo 11 psiconv_progress(lev+2,off+len,"Going to read 6 unused longs");
104 frodo 10 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 frodo 12 res = -1;
112 frodo 10 }
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 frodo 11 psiconv_progress(lev+2,off+len,"Going to read the pixel data");
123 frodo 10 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 frodo 12 res = -1;
141     read_err = 1;
142 frodo 10 } 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 frodo 12 res = -1;
174     read_err = 1;
175 frodo 10 } else {
176     temp = psiconv_read_u8(buf,lev+3,off+len+datanr);
177 frodo 13 for (i = 0; i < marker; i++) {
178 frodo 10 (*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 frodo 12 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 frodo 10 len += datanr;
209    
210     if (length)
211     *length = len;
212    
213     psiconv_progress(lev+1,off+len-1,"End of paint data section "
214 frodo 13 "(total length: %08x)", len);
215 frodo 10
216     return res;
217     }
218    
219    

frodo@frodo.looijaard.name
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