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

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Revision 15 - (hide 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 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 15 psiconv_progress(lev+2,off+len,"Going to read 6 unknown longs");
104 frodo 10 for (i = 0 ; i < 6; i++) {
105     temp = psiconv_read_u32(buf,lev+2,off+len);
106 frodo 15 if (temp != (i==2?0x02:i==5?0x01:0x00)) {
107 frodo 10 psiconv_warn(lev+2,off+len,
108     "Paint data section prologue has unknown values");
109     psiconv_debug(lev+2,off+len,
110 frodo 15 "offset %02x: read %08x, expected %08x",i,temp,
111     i==2?0x02:i==5?0x01:0x00);
112 frodo 12 res = -1;
113 frodo 10 }
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 frodo 11 psiconv_progress(lev+2,off+len,"Going to read the pixel data");
124 frodo 10 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 frodo 15 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 frodo 10 }
145 frodo 15 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 frodo 10 }
172 frodo 15 } else { /* marker < 0x080 */
173     if (datasize == datanr) {
174 frodo 10 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 frodo 15 read_err = 1;
180 frodo 12 res = -1;
181 frodo 10 } else {
182     temp = psiconv_read_u8(buf,lev+3,off+len+datanr);
183 frodo 15 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 frodo 10 }
221     }
222     datanr += 1;
223     }
224     }
225 frodo 12 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 frodo 10 len += datanr;
234    
235     if (length)
236     *length = len;
237    
238     psiconv_progress(lev+1,off+len-1,"End of paint data section "
239 frodo 13 "(total length: %08x)", len);
240 frodo 10
241     return res;
242     }
243    
244    

frodo@frodo.looijaard.name
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