1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/pvr2/rendsave.c	Wed Jan 24 08:11:14 2007 +0000
     1.3 @@ -0,0 +1,97 @@
     1.4 +/**
     1.5 + * $Id: rendsave.c,v 1.1 2007-01-16 10:34:46 nkeynes Exp $
     1.6 + *
     1.7 + * Scene-save support. This is mainly for test/debug purposes.
     1.8 + *
     1.9 + * Copyright (c) 2005 Nathan Keynes.
    1.10 + *
    1.11 + * This program is free software; you can redistribute it and/or modify
    1.12 + * it under the terms of the GNU General Public License as published by
    1.13 + * the Free Software Foundation; either version 2 of the License, or
    1.14 + * (at your option) any later version.
    1.15 + *
    1.16 + * This program is distributed in the hope that it will be useful,
    1.17 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.18 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.19 + * GNU General Public License for more details.
    1.20 + */
    1.21 +
    1.22 +#include <stdio.h>
    1.23 +#include <errno.h>
    1.24 +#include <time.h>
    1.25 +#include "pvr2/pvr2.h"
    1.26 +#include "dreamcast.h"
    1.27 +
    1.28 +/**
    1.29 + * Size of pages for the purposes of saving - this has nothing to do with the 
    1.30 + * actual page size, of course.
    1.31 + */
    1.32 +#define SAVE_PAGE_SIZE 1024
    1.33 +#define SAVE_PAGE_COUNT 8192
    1.34 +
    1.35 +extern char *video_base;
    1.36 +
    1.37 +/* Determine pages of memory to save. Start walking from the render tilemap
    1.38 + * data and build up a page list
    1.39 + */
    1.40 +static void pvr2_find_referenced_pages( char *pages )
    1.41 +{
    1.42 +    /* Dummy implementation - save everything */
    1.43 +    memset( pages, 1, SAVE_PAGE_COUNT );
    1.44 +}
    1.45 +
    1.46 +/**
    1.47 + * Save the current rendering data to a file for later analysis.
    1.48 + * @return 0 on success, non-zero on failure.
    1.49 + */
    1.50 +int pvr2_render_save_scene( const gchar *filename )
    1.51 +{
    1.52 +    struct header {
    1.53 +	char magic[16];
    1.54 +	uint32_t version;
    1.55 +	uint32_t timestamp;
    1.56 +	uint32_t frame_count;
    1.57 +    } scene_header;
    1.58 +
    1.59 +    char page_map[SAVE_PAGE_COUNT];
    1.60 +    int i,j;
    1.61 +    pvr2_find_referenced_pages(page_map);
    1.62 +    
    1.63 +    FILE *f = fopen( filename, "wo" ); 
    1.64 +    if( f == NULL ) {
    1.65 +	ERROR( "Unable to open file '%s' to write scene data: %s", filename, strerror(errno) );
    1.66 +	return -1;
    1.67 +    }
    1.68 +
    1.69 +    /* Header */
    1.70 +    memcpy( scene_header.magic, SCENE_SAVE_MAGIC, 16 );
    1.71 +    scene_header.version = SCENE_SAVE_VERSION;
    1.72 +    scene_header.timestamp = time(NULL);
    1.73 +    scene_header.frame_count = pvr2_get_frame_count();
    1.74 +    fwrite( &scene_header, sizeof(scene_header), 1, f );
    1.75 +
    1.76 +    /* PVR2 registers - could probably be more specific, but doesn't 
    1.77 +     * really use a lot of space. Loader is assumed to know which
    1.78 +     * registers actually need to be set.
    1.79 +     */
    1.80 +    fwrite( mmio_region_PVR2.mem, 0x1000, 1, f );
    1.81 +    fwrite( mmio_region_PVR2PAL.mem, 0x1000, 1, f );
    1.82 +
    1.83 +    /* Write out the VRAM pages we care about */
    1.84 +    for( i=0; i<SAVE_PAGE_COUNT; i++ ) {
    1.85 +	if( page_map[i] != 0 ) {
    1.86 +	    for( j=i+1; j<SAVE_PAGE_COUNT && page_map[j] != 0; j++ );
    1.87 +	    /* Write region from i..j-1 */
    1.88 +	    uint32_t start = i * SAVE_PAGE_SIZE;
    1.89 +	    uint32_t length = (j-i) * SAVE_PAGE_SIZE;
    1.90 +	    fwrite( &start, sizeof(uint32_t), 1, f );
    1.91 +	    fwrite( &length, sizeof(uint32_t), 1, f );
    1.92 +	    fwrite( video_base + start, 1, length, f );
    1.93 +	    i = j-1;
    1.94 +	}
    1.95 +    }
    1.96 +    /* Write out the EOF marker */
    1.97 +    uint32_t eof = 0xFFFFFFFF;
    1.98 +    fwrite( &eof, sizeof(uint32_t), 1, f );
    1.99 +    fclose( f );
   1.100 +}