nkeynes@295 | 1 | /**
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nkeynes@561 | 2 | * $Id$
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nkeynes@295 | 3 | *
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nkeynes@295 | 4 | * Scene-save support. This is mainly for test/debug purposes.
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nkeynes@295 | 5 | *
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nkeynes@295 | 6 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@295 | 7 | *
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nkeynes@295 | 8 | * This program is free software; you can redistribute it and/or modify
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nkeynes@295 | 9 | * it under the terms of the GNU General Public License as published by
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nkeynes@295 | 10 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@295 | 11 | * (at your option) any later version.
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nkeynes@295 | 12 | *
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nkeynes@295 | 13 | * This program is distributed in the hope that it will be useful,
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nkeynes@295 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@295 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@295 | 16 | * GNU General Public License for more details.
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nkeynes@295 | 17 | */
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nkeynes@295 | 18 |
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nkeynes@295 | 19 | #include <stdio.h>
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nkeynes@295 | 20 | #include <errno.h>
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nkeynes@295 | 21 | #include <time.h>
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nkeynes@669 | 22 | #include <string.h>
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nkeynes@295 | 23 | #include "pvr2/pvr2.h"
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nkeynes@677 | 24 | #include "pvr2/pvr2mmio.h"
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nkeynes@295 | 25 | #include "dreamcast.h"
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nkeynes@295 | 26 |
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nkeynes@295 | 27 | /**
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nkeynes@295 | 28 | * Size of pages for the purposes of saving - this has nothing to do with the
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nkeynes@295 | 29 | * actual page size, of course.
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nkeynes@295 | 30 | */
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nkeynes@295 | 31 | #define SAVE_PAGE_SIZE 1024
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nkeynes@295 | 32 | #define SAVE_PAGE_COUNT 8192
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nkeynes@295 | 33 |
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nkeynes@295 | 34 | extern char *video_base;
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nkeynes@295 | 35 |
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nkeynes@295 | 36 | /* Determine pages of memory to save. Start walking from the render tilemap
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nkeynes@295 | 37 | * data and build up a page list
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nkeynes@295 | 38 | */
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nkeynes@295 | 39 | static void pvr2_find_referenced_pages( char *pages )
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nkeynes@295 | 40 | {
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nkeynes@295 | 41 | /* Dummy implementation - save everything */
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nkeynes@295 | 42 | memset( pages, 1, SAVE_PAGE_COUNT );
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nkeynes@295 | 43 | }
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nkeynes@295 | 44 |
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nkeynes@295 | 45 | /**
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nkeynes@295 | 46 | * Save the current rendering data to a file for later analysis.
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nkeynes@295 | 47 | * @return 0 on success, non-zero on failure.
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nkeynes@295 | 48 | */
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nkeynes@295 | 49 | int pvr2_render_save_scene( const gchar *filename )
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nkeynes@295 | 50 | {
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nkeynes@295 | 51 | struct header {
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nkeynes@736 | 52 | char magic[16];
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nkeynes@736 | 53 | uint32_t version;
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nkeynes@736 | 54 | uint32_t timestamp;
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nkeynes@736 | 55 | uint32_t frame_count;
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nkeynes@295 | 56 | } scene_header;
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nkeynes@295 | 57 |
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nkeynes@295 | 58 | char page_map[SAVE_PAGE_COUNT];
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nkeynes@295 | 59 | int i,j;
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nkeynes@295 | 60 | pvr2_find_referenced_pages(page_map);
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nkeynes@736 | 61 |
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nkeynes@295 | 62 | FILE *f = fopen( filename, "wo" );
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nkeynes@295 | 63 | if( f == NULL ) {
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nkeynes@736 | 64 | ERROR( "Unable to open file '%s' to write scene data: %s", filename, strerror(errno) );
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nkeynes@736 | 65 | return -1;
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nkeynes@295 | 66 | }
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nkeynes@295 | 67 |
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nkeynes@295 | 68 | /* Header */
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nkeynes@295 | 69 | memcpy( scene_header.magic, SCENE_SAVE_MAGIC, 16 );
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nkeynes@295 | 70 | scene_header.version = SCENE_SAVE_VERSION;
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nkeynes@295 | 71 | scene_header.timestamp = time(NULL);
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nkeynes@295 | 72 | scene_header.frame_count = pvr2_get_frame_count();
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nkeynes@295 | 73 | fwrite( &scene_header, sizeof(scene_header), 1, f );
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nkeynes@295 | 74 |
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nkeynes@295 | 75 | /* PVR2 registers - could probably be more specific, but doesn't
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nkeynes@295 | 76 | * really use a lot of space. Loader is assumed to know which
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nkeynes@295 | 77 | * registers actually need to be set.
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nkeynes@295 | 78 | */
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nkeynes@295 | 79 | fwrite( mmio_region_PVR2.mem, 0x1000, 1, f );
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nkeynes@295 | 80 | fwrite( mmio_region_PVR2PAL.mem, 0x1000, 1, f );
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nkeynes@295 | 81 |
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nkeynes@295 | 82 | /* Write out the VRAM pages we care about */
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nkeynes@295 | 83 | for( i=0; i<SAVE_PAGE_COUNT; i++ ) {
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nkeynes@736 | 84 | if( page_map[i] != 0 ) {
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nkeynes@736 | 85 | for( j=i+1; j<SAVE_PAGE_COUNT && page_map[j] != 0; j++ );
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nkeynes@736 | 86 | /* Write region from i..j-1 */
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nkeynes@736 | 87 | uint32_t start = i * SAVE_PAGE_SIZE;
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nkeynes@736 | 88 | uint32_t length = (j-i) * SAVE_PAGE_SIZE;
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nkeynes@736 | 89 | fwrite( &start, sizeof(uint32_t), 1, f );
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nkeynes@736 | 90 | fwrite( &length, sizeof(uint32_t), 1, f );
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nkeynes@736 | 91 | fwrite( video_base + start, 1, length, f );
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nkeynes@736 | 92 | i = j-1;
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nkeynes@736 | 93 | }
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nkeynes@295 | 94 | }
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nkeynes@295 | 95 | /* Write out the EOF marker */
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nkeynes@295 | 96 | uint32_t eof = 0xFFFFFFFF;
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nkeynes@295 | 97 | fwrite( &eof, sizeof(uint32_t), 1, f );
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nkeynes@295 | 98 | fclose( f );
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nkeynes@429 | 99 | return 0;
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nkeynes@295 | 100 | }
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