1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/pvr2/ta.c	Wed Feb 15 13:11:50 2006 +0000
     1.3 @@ -0,0 +1,99 @@
     1.4 +/**
     1.5 + * $Id: ta.c,v 1.1 2006-02-15 13:11:46 nkeynes Exp $
     1.6 + *
     1.7 + * PVR2 Tile Accelerator support. In principle this does a lot more work
     1.8 + * than is currently implemented - we cheat. A lot.
     1.9 + *
    1.10 + * Copyright (c) 2005 Nathan Keynes.
    1.11 + *
    1.12 + * This program is free software; you can redistribute it and/or modify
    1.13 + * it under the terms of the GNU General Public License as published by
    1.14 + * the Free Software Foundation; either version 2 of the License, or
    1.15 + * (at your option) any later version.
    1.16 + *
    1.17 + * This program is distributed in the hope that it will be useful,
    1.18 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.19 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.20 + * GNU General Public License for more details.
    1.21 + */
    1.22 +
    1.23 +#include "pvr2/pvr2.h"
    1.24 +#include "asic.h"
    1.25 +#include "dream.h"
    1.26 +
    1.27 +/** Tile Accelerator */
    1.28 +
    1.29 +struct tacmd {
    1.30 +    uint32_t command;
    1.31 +    uint32_t param1;
    1.32 +    uint32_t param2;
    1.33 +    uint32_t texture;
    1.34 +    float alpha;
    1.35 +    float red;
    1.36 +    float green;
    1.37 +    float blue;
    1.38 +};
    1.39 +
    1.40 +struct vertex_type1 {
    1.41 +    uint32_t command;
    1.42 +    float x, y, z;
    1.43 +    uint32_t blank, blank2;
    1.44 +    uint32_t col;
    1.45 +    float f;
    1.46 +};
    1.47 +
    1.48 +/**
    1.49 + * (Re)initialize the tile accelerator in preparation for the next scene.
    1.50 + * Normally called immediately before commencing polygon transmission.
    1.51 + */
    1.52 +void pvr2_ta_init( void )
    1.53 +{
    1.54 +
    1.55 +}
    1.56 +
    1.57 +char pvr2ta_remainder[8];
    1.58 +unsigned int pvr2_last_poly_type = 0;
    1.59 +
    1.60 +/**
    1.61 + * Write a block of data to the tile accelerator, adding the data to the 
    1.62 + * current scene. We don't make any particular attempt to interpret the data
    1.63 + * at this stage, deferring that until render time.
    1.64 + */
    1.65 +void pvr2_ta_write( char *buf, uint32_t length )
    1.66 +{
    1.67 +    int i;
    1.68 +    struct tacmd *cmd_list = (struct tacmd *)buf;
    1.69 +    int count = length >> 5;
    1.70 +    for( i=0; i<count; i++ ){
    1.71 +	unsigned int type = (cmd_list[i].command >> 24) & 0xFF;
    1.72 +	if( type == 0xE0 || type == 0xF0 ) {
    1.73 +	    struct vertex_type1 *vert = (struct vertex_type1 *)&cmd_list[i];
    1.74 +	    DEBUG( "PVR2 vrt: %f %f %f %08X %08X %08X %f", vert->x, vert->y, vert->z, vert->blank, vert->blank2, vert->col, vert->f );
    1.75 +	} else {
    1.76 +	    DEBUG( "PVR2 cmd: %08X %08X %08X %08X %08X %08X %08X %08X", cmd_list[i].command, cmd_list[i].param1, cmd_list[i].param2, cmd_list[i].texture, cmd_list[i].alpha, cmd_list[i].red, cmd_list[i].green, cmd_list[i].blue );
    1.77 +	}
    1.78 +	if( type == 0 ) {
    1.79 +	    /* End of list */
    1.80 +	    switch( pvr2_last_poly_type ) {
    1.81 +	    case 0x80: /* Opaque polys */
    1.82 +		asic_event( EVENT_PVR_OPAQUE_DONE );
    1.83 +		break;
    1.84 +	    case 0x81: /* Opaque poly modifier */
    1.85 +		asic_event( EVENT_PVR_OPAQUEMOD_DONE );
    1.86 +		break;
    1.87 +	    case 0x82: /* Transparent polys */
    1.88 +		asic_event( EVENT_PVR_TRANS_DONE );
    1.89 +		break;
    1.90 +	    case 0x83: /* Transparent poly modifier */
    1.91 +		asic_event( EVENT_PVR_TRANSMOD_DONE );
    1.92 +		break;
    1.93 +	    case 0x84: /* Punchthrough */
    1.94 +		asic_event( EVENT_PVR_PUNCHOUT_DONE );
    1.95 +		break;
    1.96 +	    }
    1.97 +	    pvr2_last_poly_type = 0;
    1.98 +	} else if( type >= 0x80 && type <= 0x84 ) {
    1.99 +	    pvr2_last_poly_type = type;
   1.100 +	}
   1.101 +    }
   1.102 +}