/[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 12 - (hide annotations)
Mon Oct 11 16:15:14 1999 UTC (24 years, 5 months ago) by frodo
File MIME type: text/plain
File size: 8042 byte(s)
(Frodo) Full MBM support - untested

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     "(total length: %08x", len);
56    
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 11 psiconv_u32 size,offset,picsize,temp,datasize,pixelnr,datanr;
68     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     if (size != 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 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     picsize = (*result)->ysize * (*result)->xsize;
101    
102 frodo 11 psiconv_progress(lev+2,off+len,"Going to read 6 unused longs");
103 frodo 10 for (i = 0 ; i < 6; i++) {
104     temp = psiconv_read_u32(buf,lev+2,off+len);
105     if (temp != 0x00) {
106     psiconv_warn(lev+2,off+len,
107     "Paint data section prologue has unknown values");
108     psiconv_debug(lev+2,off+len,
109     "offset %02x: read %08x, expected %08x",i,temp,0x00);
110 frodo 12 res = -1;
111 frodo 10 }
112     len += 4;
113     }
114    
115     (*result)->red = malloc(sizeof(float) * picsize);
116     (*result)->green = malloc(sizeof(float) * picsize);
117     (*result)->blue = malloc(sizeof(float) * picsize);
118     len = offset;
119     datasize = size - len;
120    
121 frodo 11 psiconv_progress(lev+2,off+len,"Going to read the pixel data");
122 frodo 10 pixelnr = 0;
123     datanr = 0;
124     while ((datanr < datasize) && (pixelnr < picsize)) {
125     marker = psiconv_read_u8(buf,lev+3,off+len+datanr);
126     psiconv_debug(lev+3,off+len+datanr,
127     "Pixelnr %08x, Datanr %08x: Read marker %02x",
128     pixelnr,datanr,marker);
129     datanr ++;
130     if (marker >= 0x80) {
131     /* 0x100 - marker bytes of data follow */
132     if ((0x100 - marker + datanr > datasize) ||
133     ((0x100 - marker) * 4 + pixelnr > picsize)) {
134     psiconv_warn(lev+3,off+len+datanr,"Corrupted picture data");
135     psiconv_debug(lev+3,off+len+datanr,
136     "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
137     "Datanr: %08x, marker: %02x",picsize,datasize,pixelnr,
138     datanr,marker);
139 frodo 12 res = -1;
140     read_err = 1;
141 frodo 10 } else {
142     for (i = 0; i < 0x100-marker; i++) {
143     temp = psiconv_read_u8(buf,lev+3,off+len+datanr+i);
144     (*result)->red[pixelnr + i*4] =
145     (*result)->green[pixelnr + i*4] =
146     (*result)->blue[pixelnr + i*4] =
147     (temp & 0x03) * (1.0/3.0);
148     (*result)->red[pixelnr + i*4 + 1] =
149     (*result)->green[pixelnr + i*4 +1] =
150     (*result)->blue[pixelnr + i*4 + 1] =
151     ((temp >> 2) & 0x03) * (1.0/3.0);
152     (*result)->red[pixelnr + i*4 + 2] =
153     (*result)->green[pixelnr + i*4 +2] =
154     (*result)->blue[pixelnr + i*4 + 2] =
155     ((temp >> 4) & 0x03) * (1.0/3.0);
156     (*result)->red[pixelnr + i*4 + 3] =
157     (*result)->green[pixelnr + i*4 +3] =
158     (*result)->blue[pixelnr + i*4 + 3] =
159     ((temp >> 6) & 0x03) * (1.0/3.0);
160     }
161     }
162     pixelnr += (0x100 - marker) * 4;
163     datanr += (0x100 - marker);
164     } else { /* marker < 0x080 */
165     if ((datanr + 1 > datasize) ||
166     (marker * 4 + pixelnr > picsize)) {
167     psiconv_warn(lev+3,off+len+datanr,"Corrupted picture data");
168     psiconv_debug(lev+3,off+len+datanr,
169     "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
170     "Datanr: %08x, marker: %02x",picsize,datasize,pixelnr,
171     datanr,marker);
172 frodo 12 res = -1;
173     read_err = 1;
174 frodo 10 } else {
175     temp = psiconv_read_u8(buf,lev+3,off+len+datanr);
176     for (i = 0; i < marker; i++) {
177     (*result)->red[pixelnr + i*4] =
178     (*result)->green[pixelnr + i*4] =
179     (*result)->blue[pixelnr + i*4] =
180     (temp & 0x03) * (1.0/3.0);
181     (*result)->red[pixelnr + i*4 + 1] =
182     (*result)->green[pixelnr + i*4 +1] =
183     (*result)->blue[pixelnr + i*4 + 1] =
184     ((temp >> 2) & 0x03) * (1.0/3.0);
185     (*result)->red[pixelnr + i*4 + 2] =
186     (*result)->green[pixelnr + i*4 +2] =
187     (*result)->blue[pixelnr + i*4 + 2] =
188     ((temp >> 4) & 0x03) * (1.0/3.0);
189     (*result)->red[pixelnr + i*4 + 3] =
190     (*result)->green[pixelnr + i*4 +3] =
191     (*result)->blue[pixelnr + i*4 + 3] =
192     ((temp >> 6) & 0x03) * (1.0/3.0);
193     }
194     }
195     pixelnr += marker * 4;
196     datanr += 1;
197     }
198     }
199 frodo 12 if (!read_err && ((datanr != datasize) || (pixelnr != picsize))) {
200     psiconv_warn(lev+2,off+len,"Corrupted picture data!");
201     psiconv_debug(lev+3,off+len+datanr,
202     "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
203     "Datanr: %08x",picsize,datasize,pixelnr,datanr);
204     res = -1;
205     }
206    
207 frodo 10 len += datanr;
208    
209     if (length)
210     *length = len;
211    
212     psiconv_progress(lev+1,off+len-1,"End of paint data section "
213     "(total length: %08x", len);
214    
215     return res;
216     }
217    
218    

frodo@frodo.looijaard.name
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