filename | src/pvr2/rendsave.c |
changeset | 677:3ee62740ff8f |
prev | 669:ab344e42bca9 |
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author | nkeynes |
date | Sun Jun 22 06:49:00 2008 +0000 (15 years ago) |
permissions | -rw-r--r-- |
last change | Big cleanup of the command-line options Add an actual manpage (*gasp*) |
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1 /**
2 * $Id$
3 *
4 * Scene-save support. This is mainly for test/debug purposes.
5 *
6 * Copyright (c) 2005 Nathan Keynes.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
19 #include <stdio.h>
20 #include <errno.h>
21 #include <time.h>
22 #include <string.h>
23 #include "pvr2/pvr2.h"
24 #include "pvr2/pvr2mmio.h"
25 #include "dreamcast.h"
27 /**
28 * Size of pages for the purposes of saving - this has nothing to do with the
29 * actual page size, of course.
30 */
31 #define SAVE_PAGE_SIZE 1024
32 #define SAVE_PAGE_COUNT 8192
34 extern char *video_base;
36 /* Determine pages of memory to save. Start walking from the render tilemap
37 * data and build up a page list
38 */
39 static void pvr2_find_referenced_pages( char *pages )
40 {
41 /* Dummy implementation - save everything */
42 memset( pages, 1, SAVE_PAGE_COUNT );
43 }
45 /**
46 * Save the current rendering data to a file for later analysis.
47 * @return 0 on success, non-zero on failure.
48 */
49 int pvr2_render_save_scene( const gchar *filename )
50 {
51 struct header {
52 char magic[16];
53 uint32_t version;
54 uint32_t timestamp;
55 uint32_t frame_count;
56 } scene_header;
58 char page_map[SAVE_PAGE_COUNT];
59 int i,j;
60 pvr2_find_referenced_pages(page_map);
62 FILE *f = fopen( filename, "wo" );
63 if( f == NULL ) {
64 ERROR( "Unable to open file '%s' to write scene data: %s", filename, strerror(errno) );
65 return -1;
66 }
68 /* Header */
69 memcpy( scene_header.magic, SCENE_SAVE_MAGIC, 16 );
70 scene_header.version = SCENE_SAVE_VERSION;
71 scene_header.timestamp = time(NULL);
72 scene_header.frame_count = pvr2_get_frame_count();
73 fwrite( &scene_header, sizeof(scene_header), 1, f );
75 /* PVR2 registers - could probably be more specific, but doesn't
76 * really use a lot of space. Loader is assumed to know which
77 * registers actually need to be set.
78 */
79 fwrite( mmio_region_PVR2.mem, 0x1000, 1, f );
80 fwrite( mmio_region_PVR2PAL.mem, 0x1000, 1, f );
82 /* Write out the VRAM pages we care about */
83 for( i=0; i<SAVE_PAGE_COUNT; i++ ) {
84 if( page_map[i] != 0 ) {
85 for( j=i+1; j<SAVE_PAGE_COUNT && page_map[j] != 0; j++ );
86 /* Write region from i..j-1 */
87 uint32_t start = i * SAVE_PAGE_SIZE;
88 uint32_t length = (j-i) * SAVE_PAGE_SIZE;
89 fwrite( &start, sizeof(uint32_t), 1, f );
90 fwrite( &length, sizeof(uint32_t), 1, f );
91 fwrite( video_base + start, 1, length, f );
92 i = j-1;
93 }
94 }
95 /* Write out the EOF marker */
96 uint32_t eof = 0xFFFFFFFF;
97 fwrite( &eof, sizeof(uint32_t), 1, f );
98 fclose( f );
99 return 0;
100 }
.