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lxdream.org :: lxdream/src/pvr2/tacore.c
lxdream 0.9.1
released Jun 29
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filename src/pvr2/tacore.c
changeset 736:a02d1475ccfd
prev677:3ee62740ff8f
next753:1fe39c3a9bbc
author nkeynes
date Mon Jul 14 07:44:42 2008 +0000 (13 years ago)
permissions -rw-r--r--
last change Re-indent everything consistently
Fix include guards for consistency as well
file annotate diff log raw
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/**
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 * $Id$
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 *
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 * PVR2 Tile Accelerator implementation
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 *
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 * Copyright (c) 2005 Nathan Keynes.
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 */
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#include <string.h>
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#include "lxdream.h"
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#include "pvr2/pvr2.h"
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#include "pvr2/pvr2mmio.h"
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#include "asic.h"
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#include "dream.h"
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#define STATE_IDLE                 0
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#define STATE_IN_LIST              1
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#define STATE_IN_POLYGON           2
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#define STATE_EXPECT_POLY_BLOCK2   3
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#define STATE_EXPECT_VERTEX_BLOCK2 4
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#define STATE_ERROR                5
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#define STATE_EXPECT_END_VERTEX_BLOCK2 7
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#define TA_CMD(i) ( (i) >> 29 )
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#define TA_CMD_END_LIST 0
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#define TA_CMD_CLIP 1
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#define TA_CMD_POLYGON_CONTEXT 4
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#define TA_CMD_SPRITE_CONTEXT 5
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#define TA_CMD_VERTEX 7
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#define TA_LIST_NONE -1
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#define TA_LIST_OPAQUE 0
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#define TA_LIST_OPAQUE_MOD 1
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#define TA_LIST_TRANS 2
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#define TA_LIST_TRANS_MOD 3
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#define TA_LIST_PUNCH_OUT 4
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#define TA_IS_MODIFIER_LIST(list) (list == TA_LIST_OPAQUE_MOD || list == TA_LIST_TRANS_MOD)
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#define TA_GROW_UP 0
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#define TA_GROW_DOWN 1
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#define TA_VERTEX_NONE                        -1
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#define TA_VERTEX_PACKED                      0x00
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#define TA_VERTEX_TEX_PACKED                  0x08
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#define TA_VERTEX_TEX_SPEC_PACKED             0x0C
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#define TA_VERTEX_TEX_UV16_PACKED             0x09
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#define TA_VERTEX_TEX_UV16_SPEC_PACKED        0x0D
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#define TA_VERTEX_FLOAT                       0x10
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#define TA_VERTEX_TEX_FLOAT                   0x18
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#define TA_VERTEX_TEX_SPEC_FLOAT              0x1C
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#define TA_VERTEX_TEX_UV16_FLOAT              0x19
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#define TA_VERTEX_TEX_UV16_SPEC_FLOAT         0x1D
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#define TA_VERTEX_INTENSITY                   0x20
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#define TA_VERTEX_TEX_INTENSITY               0x28
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#define TA_VERTEX_TEX_SPEC_INTENSITY          0x2C
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#define TA_VERTEX_TEX_UV16_INTENSITY          0x29
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#define TA_VERTEX_TEX_UV16_SPEC_INTENSITY     0x2D
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#define TA_VERTEX_PACKED_MOD                  0x40
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#define TA_VERTEX_TEX_PACKED_MOD              0x48
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#define TA_VERTEX_TEX_SPEC_PACKED_MOD         0x4C
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#define TA_VERTEX_TEX_UV16_PACKED_MOD         0x49
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#define TA_VERTEX_TEX_UV16_SPEC_PACKED_MOD    0x4D
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#define TA_VERTEX_INTENSITY_MOD               0x60
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#define TA_VERTEX_TEX_INTENSITY_MOD           0x68
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#define TA_VERTEX_TEX_SPEC_INTENSITY_MOD      0x6C
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#define TA_VERTEX_TEX_UV16_INTENSITY_MOD      0x69
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#define TA_VERTEX_TEX_UV16_SPEC_INTENSITY_MOD 0x6D
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#define TA_VERTEX_SPRITE                      0x80
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#define TA_VERTEX_TEX_SPRITE                  0x88
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#define TA_VERTEX_MOD_VOLUME                  0x81
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#define TA_VERTEX_LISTLESS                    0xFF
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#define TA_IS_NORMAL_POLY() (ta_status.current_vertex_type < TA_VERTEX_SPRITE)
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static int strip_lengths[4] = {3,4,6,8}; /* in vertexes */
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#define TA_POLYCMD_LISTTYPE(i) ( ((i) >> 24) & 0x0F )
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#define TA_POLYCMD_USELENGTH(i) ( i & 0x00800000 )
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#define TA_POLYCMD_LENGTH(i)  strip_lengths[((i >> 18) & 0x03)]
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#define TA_POLYCMD_CLIP(i)  ((i>>16)&0x03)
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#define TA_POLYCMD_CLIP_NONE 0
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#define TA_POLYCMD_CLIP_INSIDE 2
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#define TA_POLYCMD_CLIP_OUTSIDE 3
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#define TA_POLYCMD_COLOURFMT(i)  (i & 0x00000030)
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#define TA_POLYCMD_COLOURFMT_ARGB32 0x00000000
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#define TA_POLYCMD_COLOURFMT_FLOAT 0x00000010
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#define TA_POLYCMD_COLOURFMT_INTENSITY 0x00000020
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#define TA_POLYCMD_COLOURFMT_LASTINT 0x00000030
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#define TA_POLYCMD_MODIFIED 0x00000080
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#define TA_POLYCMD_FULLMOD  0x00000040
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#define TA_POLYCMD_TEXTURED 0x00000008
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#define TA_POLYCMD_SPECULAR 0x00000004
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#define TA_POLYCMD_SHADED 0x00000002
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#define TA_POLYCMD_UV16 0x00000001
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#define TA_POLYCMD_IS_SPECULAR(i) ((i & 0x0000000C)==0x0000000C) /* Only applies to textured polys */
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#define TA_POLYCMD_IS_FULLMOD(i) ((i & 0x000000C0)==0x000000C0)
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#define TA_IS_END_VERTEX(i) (i & 0x10000000)
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/** Note these are not the IEEE 754 definitions - the TA treats NANs
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 * as if they were INFs of the appropriate sign.
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 */
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#define TA_IS_INF(f) (((*((uint32_t *)&f)) & 0xFF800000) == 0x7F800000)
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#define TA_IS_NINF(f) (((*((uint32_t *)&f)) & 0xFF800000) == 0xFF800000)
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#define MIN3( x1, x2, x3 ) ( (x1)<(x2)? ((x1)<(x3)?(x1):(x3)) : ((x2)<(x3)?(x2):(x3)) )
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#define MAX3( x1, x2, x3 ) ( (x1)>(x2)? ((x1)>(x3)?(x1):(x3)) : ((x2)>(x3)?(x2):(x3)) )
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#define TILESLOT( x, y ) (ta_status.current_tile_matrix + (ta_status.current_tile_size * (y * ta_status.width+ x) << 2))
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extern char *video_base;
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#define PVRRAM(addr) (*(uint32_t *)(video_base + ((addr)&PVR2_RAM_MASK)))
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struct pvr2_ta_vertex {
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    float x,y,z;
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    uint32_t detail[8]; /* 0-8 detail words */
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};
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struct tile_bounds {
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    int32_t x1, y1, x2, y2;
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};
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struct pvr2_ta_status {
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    int32_t state;
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    int32_t width, height; /* Tile resolution, ie 20x15 */
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    int32_t tilelist_dir; /* Growth direction of the tilelist, 0 = up, 1 = down */
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    uint32_t tilelist_size; /* Size of the tilelist segments */
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    uint32_t tilelist_start; /* Initial address of the tilelist */
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    uint32_t polybuf_start; /* Initial bank address of the polygon buffer (ie &0x00F00000) */
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    int32_t current_vertex_type;
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    uint32_t accept_vertexes; /* 0 = NO, 1 = YES */
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    int32_t vertex_count; /* index of last start-vertex seen, or -1 if no vertexes 
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     * are present
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     */
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    uint32_t max_vertex;     /* Maximum number of vertexes in the current polygon (3/4/6/8) */
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    uint32_t current_list_type;
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    uint32_t current_tile_matrix; /* Memory location of the first tile for the current list. */
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    uint32_t current_tile_size; /* Size of the tile matrix space  in 32-bit words (0/8/16/32)*/
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    uint32_t intensity1, intensity2;
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    struct tile_bounds clip;
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    int32_t clip_mode;
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    /**
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     * Current working object
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     */
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    int32_t poly_context_size;
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    int32_t poly_vertex_size;
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    int32_t poly_parity;
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    uint32_t poly_context[5];
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    uint32_t poly_pointer;
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    struct tile_bounds last_triangle_bounds;
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    struct pvr2_ta_vertex poly_vertex[8];
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    uint32_t debug_output;
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};
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static struct pvr2_ta_status ta_status;
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static int tilematrix_sizes[4] = {0,8,16,32};
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/**
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 * Convenience union - ta data is either 32-bit integer or 32-bit float.
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 */
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union ta_data {
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    unsigned int i;
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    float f;
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};
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void pvr2_ta_reset() {
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    ta_status.state = STATE_ERROR; /* State not valid until initialized */
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    ta_status.debug_output = 0;
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}
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void pvr2_ta_save_state( FILE *f )
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{
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    fwrite( &ta_status, sizeof(ta_status), 1, f );
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}
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int pvr2_ta_load_state( FILE *f )
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{
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    if( fread( &ta_status, sizeof(ta_status), 1, f ) != 1 )
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        return 1;
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    return 0;
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}
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void pvr2_ta_init() {
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    ta_status.state = STATE_IDLE;
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    ta_status.current_list_type = -1;
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    ta_status.current_vertex_type = -1;
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    ta_status.poly_parity = 0;
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    ta_status.vertex_count = 0;
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    ta_status.max_vertex = 3;
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    ta_status.current_vertex_type = TA_VERTEX_LISTLESS;
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    ta_status.poly_vertex_size = 0;
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    memset(&ta_status.poly_context[1], 0, 4);
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    ta_status.last_triangle_bounds.x1 = -1;
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    ta_status.accept_vertexes = TRUE;
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    ta_status.clip.x1 = 0;
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    ta_status.clip.y1 = 0;
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    ta_status.clip_mode = TA_POLYCMD_CLIP_NONE;
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    uint32_t size = MMIO_READ( PVR2, TA_TILESIZE );
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    ta_status.width = (size & 0xFFFF) + 1;
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    ta_status.height = (size >> 16) + 1;
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    ta_status.clip.x2 = ta_status.width-1;
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    ta_status.clip.y2 = ta_status.height-1;
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    uint32_t control = MMIO_READ( PVR2, TA_TILECFG );
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    ta_status.tilelist_dir = (control >> 20) & 0x01;
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    ta_status.tilelist_size = tilematrix_sizes[ (control & 0x03) ];
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    MMIO_WRITE( PVR2, TA_POLYPOS, MMIO_READ( PVR2, TA_POLYBASE ) );
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    uint32_t plistpos = MMIO_READ( PVR2, TA_LISTBASE ) >> 2;
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    if( ta_status.tilelist_dir == TA_GROW_DOWN ) {
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        plistpos -= ta_status.tilelist_size;
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    }
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    MMIO_WRITE( PVR2, TA_LISTPOS, plistpos );
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    ta_status.tilelist_start = plistpos;
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    ta_status.polybuf_start = MMIO_READ( PVR2, TA_POLYBASE ) & 0x00F00000;
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}
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static uint32_t parse_float_colour( float a, float r, float g, float b ) {
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    int ai,ri,gi,bi;
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    if( TA_IS_INF(a) ) {
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        ai = 255;
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    } else {
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        ai = 256 * CLAMP(a,0.0,1.0) - 1;
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        if( ai < 0 ) ai = 0;
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    }
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    if( TA_IS_INF(r) ) {
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        ri = 255;
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    } else {
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        ri = 256 * CLAMP(r,0.0,1.0) - 1;
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        if( ri < 0 ) ri = 0;
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    }
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    if( TA_IS_INF(g) ) {
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        gi = 255;
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    } else {
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        gi = 256 * CLAMP(g,0.0,1.0) - 1;
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        if( gi < 0 ) gi = 0;
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    }
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    if( TA_IS_INF(b) ) {
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        bi = 255;
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    } else {
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        bi = 256 * CLAMP(b,0.0,1.0) - 1;
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        if( bi < 0 ) bi = 0;
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    }
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    return (ai << 24) | (ri << 16) | (gi << 8) | bi;
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}
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static uint32_t parse_intensity_colour( uint32_t base, float intensity )
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{
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    unsigned int i = (unsigned int)(256 * CLAMP(intensity, 0.0,1.0));
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    return
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    (((((base & 0xFF) * i) & 0xFF00) |
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            (((base & 0xFF00) * i) & 0xFF0000) |
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            (((base & 0xFF0000) * i) & 0xFF000000)) >> 8) |
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            (base & 0xFF000000);
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}
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/**
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 * Initialize the specified TA list.
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 */
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static void ta_init_list( unsigned int listtype ) {
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    int config = MMIO_READ( PVR2, TA_TILECFG );
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    int tile_matrix = MMIO_READ( PVR2, TA_TILEBASE );
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    int list_end = MMIO_READ( PVR2, TA_LISTEND );
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    ta_status.current_tile_matrix = tile_matrix;
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    /* If the list grows down, the end must be < tile matrix start. 
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     * If it grows up, the end must be > tile matrix start.
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     * Don't ask me why, it just does...
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     */
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    if( ((ta_status.tilelist_dir == TA_GROW_DOWN && list_end <= tile_matrix) ||
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            (ta_status.tilelist_dir == TA_GROW_UP && list_end >= tile_matrix )) &&
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            listtype <= TA_LIST_PUNCH_OUT ) {
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        int i;
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        uint32_t *p;
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        for( i=0; i < listtype; i++ ) {
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            int size = tilematrix_sizes[(config & 0x03)] << 2;
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            ta_status.current_tile_matrix += ta_status.width * ta_status.height * size;
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            config >>= 4;
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        }
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        ta_status.current_tile_size = tilematrix_sizes[(config & 0x03)];
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        /* Initialize each tile to 0xF0000000 */
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        if( ta_status.current_tile_size != 0 ) {
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            p = (uint32_t *)(video_base + ta_status.current_tile_matrix);
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            for( i=0; i< ta_status.width * ta_status.height; i++ ) {
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                *p = 0xF0000000;
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                p += ta_status.current_tile_size;
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            }
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        }
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    } else {
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        ta_status.current_tile_size = 0;
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    }
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    if( tile_matrix == list_end ) {
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        ta_status.current_tile_size = 0;
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    }
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    ta_status.state = STATE_IN_LIST;
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    ta_status.current_list_type = listtype;
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    ta_status.last_triangle_bounds.x1 = -1;
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}
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static int list_events[5] = {EVENT_PVR_OPAQUE_DONE, EVENT_PVR_OPAQUEMOD_DONE, 
nkeynes@736
   319
        EVENT_PVR_TRANS_DONE, EVENT_PVR_TRANSMOD_DONE,
nkeynes@736
   320
        EVENT_PVR_PUNCHOUT_DONE };
nkeynes@189
   321
nkeynes@189
   322
static void ta_end_list() {
nkeynes@189
   323
    if( ta_status.current_list_type != TA_LIST_NONE ) {
nkeynes@736
   324
        asic_event( list_events[ta_status.current_list_type] );
nkeynes@189
   325
    }
nkeynes@206
   326
    ta_status.current_list_type = TA_LIST_NONE;
nkeynes@206
   327
    ta_status.current_vertex_type = TA_VERTEX_LISTLESS;
nkeynes@206
   328
    ta_status.poly_vertex_size = 0;
nkeynes@206
   329
    memset(&ta_status.poly_context[1], 0, 4);
nkeynes@206
   330
    ta_status.state = STATE_IDLE;
nkeynes@206
   331
}
nkeynes@206
   332
nkeynes@206
   333
static void ta_bad_input_error() {
nkeynes@206
   334
    asic_event( EVENT_PVR_BAD_INPUT );
nkeynes@189
   335
}
nkeynes@189
   336
nkeynes@189
   337
/**
nkeynes@189
   338
 * Write data out to the polygon buffer.
nkeynes@189
   339
 * If the end-of-buffer is reached, asserts EVENT_PVR_PRIM_ALLOC_FAIL
nkeynes@189
   340
 * @param data to be written
nkeynes@189
   341
 * @param length Number of 32-bit words to write.
nkeynes@189
   342
 * @return number of words actually written
nkeynes@189
   343
 */
nkeynes@189
   344
static int ta_write_polygon_buffer( uint32_t *data, int length )
nkeynes@189
   345
{
nkeynes@189
   346
    int rv;
nkeynes@189
   347
    int posn = MMIO_READ( PVR2, TA_POLYPOS );
nkeynes@189
   348
    int end = MMIO_READ( PVR2, TA_POLYEND );
nkeynes@189
   349
    uint32_t *target = (uint32_t *)(video_base + posn);
nkeynes@189
   350
    for( rv=0; rv < length; rv++ ) {
nkeynes@736
   351
        if( posn == end ) {
nkeynes@736
   352
            asic_event( EVENT_PVR_PRIM_ALLOC_FAIL );
nkeynes@736
   353
            //	    ta_status.state = STATE_ERROR;
nkeynes@736
   354
            break;
nkeynes@736
   355
        }
nkeynes@736
   356
        if( posn < PVR2_RAM_SIZE ) {
nkeynes@736
   357
            *target++ = *data++;
nkeynes@736
   358
        }
nkeynes@736
   359
        posn += 4;
nkeynes@189
   360
    }
nkeynes@189
   361
nkeynes@189
   362
    MMIO_WRITE( PVR2, TA_POLYPOS, posn );
nkeynes@189
   363
    return rv;
nkeynes@189
   364
}
nkeynes@189
   365
nkeynes@193
   366
#define TA_NO_ALLOC 0xFFFFFFFF
nkeynes@193
   367
nkeynes@189
   368
/**
nkeynes@193
   369
 * Allocate a new tile list block from the grow space and update the
nkeynes@193
   370
 * word at reference to be a link to the new block.
nkeynes@189
   371
 */
nkeynes@193
   372
static uint32_t ta_alloc_tilelist( uint32_t reference ) {
nkeynes@189
   373
    uint32_t posn = MMIO_READ( PVR2, TA_LISTPOS );
nkeynes@193
   374
    uint32_t limit = MMIO_READ( PVR2, TA_LISTEND ) >> 2;
nkeynes@189
   375
    uint32_t newposn;
nkeynes@189
   376
    if( ta_status.tilelist_dir == TA_GROW_DOWN ) {
nkeynes@736
   377
        newposn = posn - ta_status.tilelist_size;
nkeynes@736
   378
        if( posn == limit ) {
nkeynes@736
   379
            PVRRAM(posn<<2) = 0xF0000000;
nkeynes@736
   380
            PVRRAM(reference) = 0xE0000000 | (posn<<2);
nkeynes@736
   381
            return TA_NO_ALLOC;
nkeynes@736
   382
        } else if( posn < limit ) {
nkeynes@736
   383
            PVRRAM(reference) = 0xE0000000 | (posn<<2);
nkeynes@736
   384
            return TA_NO_ALLOC;
nkeynes@736
   385
        } else if( newposn <= limit ) {
nkeynes@736
   386
        } else if( newposn <= (limit + ta_status.tilelist_size) ) {
nkeynes@736
   387
            asic_event( EVENT_PVR_MATRIX_ALLOC_FAIL );
nkeynes@736
   388
            MMIO_WRITE( PVR2, TA_LISTPOS, newposn );
nkeynes@736
   389
        } else {
nkeynes@736
   390
            MMIO_WRITE( PVR2, TA_LISTPOS, newposn );
nkeynes@736
   391
        }
nkeynes@736
   392
        PVRRAM(reference) = 0xE0000000 | (posn<<2);
nkeynes@736
   393
        return posn << 2;
nkeynes@189
   394
    } else {
nkeynes@736
   395
        newposn = posn + ta_status.tilelist_size;
nkeynes@736
   396
        if( posn == limit ) {
nkeynes@736
   397
            PVRRAM(posn<<2) = 0xF0000000;
nkeynes@736
   398
            PVRRAM(reference) = 0xE0000000 | (posn<<2);
nkeynes@736
   399
            return TA_NO_ALLOC;
nkeynes@736
   400
        } else if ( posn > limit ) {
nkeynes@736
   401
            PVRRAM(reference) = 0xE0000000 | (posn<<2);
nkeynes@736
   402
            return TA_NO_ALLOC;
nkeynes@736
   403
        } else if( newposn >= limit ) {
nkeynes@736
   404
        } else if( newposn >= (limit - ta_status.tilelist_size) ) {
nkeynes@736
   405
            asic_event( EVENT_PVR_MATRIX_ALLOC_FAIL );
nkeynes@736
   406
            MMIO_WRITE( PVR2, TA_LISTPOS, newposn );
nkeynes@736
   407
        } else {
nkeynes@736
   408
            MMIO_WRITE( PVR2, TA_LISTPOS, newposn );
nkeynes@736
   409
        }	    
nkeynes@736
   410
        PVRRAM(reference) = 0xE0000000 | (posn<<2);
nkeynes@736
   411
        return posn << 2;
nkeynes@189
   412
    }
nkeynes@189
   413
}
nkeynes@189
   414
nkeynes@189
   415
/**
nkeynes@189
   416
 * Write a tile entry out to the matrix.
nkeynes@189
   417
 */
nkeynes@429
   418
static void ta_write_tile_entry( int x, int y, uint32_t tile_entry ) {
nkeynes@189
   419
    uint32_t tile = TILESLOT(x,y);
nkeynes@193
   420
    uint32_t tilestart = tile;
nkeynes@189
   421
    uint32_t value;
nkeynes@189
   422
    uint32_t lasttri = 0;
nkeynes@429
   423
    int i;
nkeynes@189
   424
nkeynes@203
   425
    if( ta_status.clip_mode == TA_POLYCMD_CLIP_OUTSIDE &&
nkeynes@736
   426
            x >= ta_status.clip.x1 && x <= ta_status.clip.x2 &&
nkeynes@736
   427
            y >= ta_status.clip.y1 && y <= ta_status.clip.y2 ) {
nkeynes@736
   428
        /* Tile clipped out */
nkeynes@736
   429
        return;
nkeynes@203
   430
    }
nkeynes@203
   431
nkeynes@189
   432
    if( (tile_entry & 0x80000000) && 
nkeynes@736
   433
            ta_status.last_triangle_bounds.x1 != -1 &&
nkeynes@736
   434
            ta_status.last_triangle_bounds.x1 <= x &&
nkeynes@736
   435
            ta_status.last_triangle_bounds.x2 >= x &&
nkeynes@736
   436
            ta_status.last_triangle_bounds.y1 <= y &&
nkeynes@736
   437
            ta_status.last_triangle_bounds.y2 >= y ) {
nkeynes@736
   438
        /* potential for triangle stacking */
nkeynes@736
   439
        lasttri = tile_entry & 0xE1E00000;
nkeynes@189
   440
    }
nkeynes@736
   441
nkeynes@736
   442
nkeynes@189
   443
    if( PVRRAM(tile) == 0xF0000000 ) {
nkeynes@736
   444
        PVRRAM(tile) = tile_entry;
nkeynes@736
   445
        PVRRAM(tile+4) = 0xF0000000;
nkeynes@736
   446
        return;
nkeynes@189
   447
    }
nkeynes@189
   448
nkeynes@189
   449
    while(1) {
nkeynes@736
   450
        value = PVRRAM(tile);
nkeynes@736
   451
        for( i=1; i<ta_status.current_tile_size; i++ ) {
nkeynes@736
   452
            tile += 4;
nkeynes@736
   453
            uint32_t nextval = PVRRAM(tile);
nkeynes@736
   454
            if( nextval == 0xF0000000 ) {
nkeynes@736
   455
                if( lasttri != 0 && lasttri == (value&0xE1E00000) ) {
nkeynes@736
   456
                    int count = (value & 0x1E000000) + 0x02000000;
nkeynes@736
   457
                    if( count < 0x20000000 ) {
nkeynes@736
   458
                        PVRRAM(tile-4) = (value & 0xE1FFFFFF) | count;
nkeynes@736
   459
                        return;
nkeynes@736
   460
                    }
nkeynes@736
   461
                }
nkeynes@736
   462
                if( i < ta_status.current_tile_size-1 ) {
nkeynes@736
   463
                    PVRRAM(tile) = tile_entry;
nkeynes@736
   464
                    PVRRAM(tile+4) = 0xF0000000;
nkeynes@736
   465
                    return;
nkeynes@736
   466
                }
nkeynes@736
   467
            }
nkeynes@736
   468
            value = nextval;
nkeynes@736
   469
        }
nkeynes@189
   470
nkeynes@736
   471
        if( value == 0xF0000000 ) {
nkeynes@736
   472
            tile = ta_alloc_tilelist(tile);
nkeynes@736
   473
            if( tile != TA_NO_ALLOC ) {
nkeynes@736
   474
                PVRRAM(tile) = tile_entry;
nkeynes@736
   475
                PVRRAM(tile+4) = 0xF0000000;
nkeynes@736
   476
            }
nkeynes@736
   477
            return;
nkeynes@736
   478
        } else if( (value & 0xFF000000) == 0xE0000000 ) {
nkeynes@736
   479
            value &= 0x00FFFFFF;
nkeynes@736
   480
            if( value == tilestart )
nkeynes@736
   481
                return; /* Loop */
nkeynes@736
   482
            tilestart = tile = value;
nkeynes@736
   483
        } else {
nkeynes@736
   484
            /* This should never happen */
nkeynes@736
   485
            return;
nkeynes@736
   486
        }
nkeynes@189
   487
    }
nkeynes@189
   488
}
nkeynes@189
   489
nkeynes@189
   490
/**
nkeynes@189
   491
 * Write a completed polygon out to the memory buffers 
nkeynes@189
   492
 * OPTIMIZEME: This is not terribly efficient at the moment.
nkeynes@189
   493
 */
nkeynes@189
   494
static void ta_commit_polygon( ) {
nkeynes@189
   495
    int i, x, y;
nkeynes@189
   496
    int tx[ta_status.vertex_count], ty[ta_status.vertex_count];
nkeynes@189
   497
    struct tile_bounds triangle_bound[ta_status.vertex_count - 2];
nkeynes@189
   498
    struct tile_bounds polygon_bound;
nkeynes@189
   499
    uint32_t poly_context[5];
nkeynes@189
   500
nkeynes@189
   501
    memcpy( poly_context, ta_status.poly_context, ta_status.poly_context_size * 4 );
nkeynes@189
   502
nkeynes@189
   503
    /* Compute the tile coordinates for each vertex (need to be careful with
nkeynes@189
   504
     * clamping here)
nkeynes@189
   505
     */
nkeynes@189
   506
    for( i=0; i<ta_status.vertex_count; i++ ) {
nkeynes@736
   507
        if( ta_status.poly_vertex[i].x < 0.0 || TA_IS_NINF(ta_status.poly_vertex[i].x) ) {
nkeynes@736
   508
            tx[i] = -1;
nkeynes@736
   509
        } else if( ta_status.poly_vertex[i].x > (float)INT_MAX || TA_IS_INF(ta_status.poly_vertex[i].x) ) {
nkeynes@736
   510
            tx[i] = INT_MAX/32;
nkeynes@736
   511
        } else {
nkeynes@736
   512
            tx[i] = (int)(ta_status.poly_vertex[i].x / 32.0);
nkeynes@736
   513
        }
nkeynes@736
   514
        if( ta_status.poly_vertex[i].y < 0.0 || TA_IS_NINF(ta_status.poly_vertex[i].y)) {
nkeynes@736
   515
            ty[i] = -1;
nkeynes@736
   516
        } else if( ta_status.poly_vertex[i].y > (float)INT_MAX || TA_IS_INF(ta_status.poly_vertex[i].y) ) {
nkeynes@736
   517
            ty[i] = INT_MAX/32;
nkeynes@736
   518
        } else {
nkeynes@736
   519
            ty[i] = (int)(ta_status.poly_vertex[i].y / 32.0);
nkeynes@736
   520
        }
nkeynes@736
   521
nkeynes@189
   522
    }
nkeynes@189
   523
nkeynes@189
   524
    /* Compute bounding box for each triangle individually, as well
nkeynes@189
   525
     * as the overall polygon.
nkeynes@189
   526
     */
nkeynes@189
   527
nkeynes@189
   528
    for( i=0; i<ta_status.vertex_count-2; i++ ) {
nkeynes@736
   529
        triangle_bound[i].x1 = MIN3(tx[i],tx[i+1],tx[i+2]);
nkeynes@736
   530
        triangle_bound[i].x2 = MAX3(tx[i],tx[i+1],tx[i+2]);
nkeynes@736
   531
        triangle_bound[i].y1 = MIN3(ty[i],ty[i+1],ty[i+2]);
nkeynes@736
   532
        triangle_bound[i].y2 = MAX3(ty[i],ty[i+1],ty[i+2]);
nkeynes@736
   533
        if( i == 0 ) {
nkeynes@736
   534
            polygon_bound.x1 = triangle_bound[0].x1;
nkeynes@736
   535
            polygon_bound.y1 = triangle_bound[0].y1;
nkeynes@736
   536
            polygon_bound.x2 = triangle_bound[0].x2;
nkeynes@736
   537
            polygon_bound.y2 = triangle_bound[0].y2;
nkeynes@736
   538
        } else {
nkeynes@736
   539
            polygon_bound.x1 = MIN(polygon_bound.x1, triangle_bound[i].x1);
nkeynes@736
   540
            polygon_bound.x2 = MAX(polygon_bound.x2, triangle_bound[i].x2);
nkeynes@736
   541
            polygon_bound.y1 = MIN(polygon_bound.y1, triangle_bound[i].y1);
nkeynes@736
   542
            polygon_bound.y2 = MAX(polygon_bound.y2, triangle_bound[i].y2);
nkeynes@736
   543
        }
nkeynes@189
   544
    }
nkeynes@189
   545
nkeynes@189
   546
    /* Clamp the polygon bounds to the frustum */
nkeynes@189
   547
    if( polygon_bound.x1 < 0 ) polygon_bound.x1 = 0;
nkeynes@189
   548
    if( polygon_bound.x2 >= ta_status.width ) polygon_bound.x2 = ta_status.width-1;
nkeynes@189
   549
    if( polygon_bound.y1 < 0 ) polygon_bound.y1 = 0;
nkeynes@189
   550
    if( polygon_bound.y2 >= ta_status.width ) polygon_bound.y2 = ta_status.height-1;
nkeynes@189
   551
nkeynes@189
   552
    /* Set the "single tile" flag if it's entirely contained in 1 tile */
nkeynes@189
   553
    if( polygon_bound.x1 == polygon_bound.x2 &&
nkeynes@736
   554
            polygon_bound.y1 == polygon_bound.y2 ) {
nkeynes@736
   555
        poly_context[0] |= 0x00200000;
nkeynes@189
   556
    }
nkeynes@736
   557
nkeynes@203
   558
    /* If the polygon is entirely clipped, don't even write the polygon data */
nkeynes@203
   559
    switch( ta_status.clip_mode ) {
nkeynes@203
   560
    case TA_POLYCMD_CLIP_NONE:
nkeynes@736
   561
        if( polygon_bound.x2 < 0 || polygon_bound.x1 >= ta_status.width ||
nkeynes@736
   562
                polygon_bound.y2 < 0 || polygon_bound.y1 >= ta_status.height ) {
nkeynes@736
   563
            return;
nkeynes@736
   564
        }
nkeynes@736
   565
        break;
nkeynes@203
   566
    case TA_POLYCMD_CLIP_INSIDE:
nkeynes@736
   567
        if( polygon_bound.x2 < ta_status.clip.x1 || polygon_bound.x1 > ta_status.clip.x2 ||
nkeynes@736
   568
                polygon_bound.y2 < ta_status.clip.y1 || polygon_bound.y1 > ta_status.clip.y2 ) {
nkeynes@736
   569
            return;
nkeynes@736
   570
        } else {
nkeynes@736
   571
            /* Clamp to clip bounds */
nkeynes@736
   572
            if( polygon_bound.x1 < ta_status.clip.x1 ) polygon_bound.x1 = ta_status.clip.x1;
nkeynes@736
   573
            if( polygon_bound.x2 > ta_status.clip.x2 ) polygon_bound.x2 = ta_status.clip.x2;
nkeynes@736
   574
            if( polygon_bound.y1 < ta_status.clip.y1 ) polygon_bound.y1 = ta_status.clip.y1;
nkeynes@736
   575
            if( polygon_bound.y2 > ta_status.clip.y2 ) polygon_bound.y2 = ta_status.clip.y2;
nkeynes@736
   576
        }
nkeynes@736
   577
        break;
nkeynes@203
   578
    case TA_POLYCMD_CLIP_OUTSIDE:
nkeynes@736
   579
        if( polygon_bound.x1 >= ta_status.clip.x1 && polygon_bound.x2 <= ta_status.clip.x2 &&
nkeynes@736
   580
                polygon_bound.y1 >= ta_status.clip.y1 && polygon_bound.y2 <= ta_status.clip.y2 ) {
nkeynes@736
   581
            return;
nkeynes@736
   582
        }
nkeynes@736
   583
        break;
nkeynes@203
   584
    }
nkeynes@189
   585
nkeynes@189
   586
    /* Ok, we're good to go - write out the polygon first */
nkeynes@215
   587
    uint32_t tile_entry = (MMIO_READ( PVR2, TA_POLYPOS ) - ta_status.polybuf_start) >> 2 | 
nkeynes@736
   588
    ta_status.poly_pointer;
nkeynes@736
   589
nkeynes@189
   590
    int status = ta_write_polygon_buffer( poly_context, ta_status.poly_context_size );
nkeynes@189
   591
    if( status == 0 ) {
nkeynes@736
   592
        /* No memory available - abort */
nkeynes@736
   593
        return;
nkeynes@189
   594
    } else {
nkeynes@736
   595
        for( i=0; i<ta_status.vertex_count && status != 0; i++ ) {
nkeynes@736
   596
            status = ta_write_polygon_buffer( (uint32_t *)(&ta_status.poly_vertex[i]), 3 + ta_status.poly_vertex_size );
nkeynes@736
   597
        }
nkeynes@189
   598
    }
nkeynes@189
   599
nkeynes@193
   600
    if( ta_status.current_tile_size == 0 ) {
nkeynes@736
   601
        /* No memory for tile entry, so don't write anything */
nkeynes@736
   602
        return;
nkeynes@193
   603
    }
nkeynes@193
   604
nkeynes@189
   605
    /* And now the tile entries. Triangles are different from everything else */
nkeynes@189
   606
    if( ta_status.vertex_count == 3 ) {
nkeynes@736
   607
        tile_entry |= 0x80000000;
nkeynes@736
   608
        for( y=polygon_bound.y1; y<=polygon_bound.y2; y++ ) {
nkeynes@736
   609
            for( x=polygon_bound.x1; x<=polygon_bound.x2; x++ ) {
nkeynes@736
   610
                ta_write_tile_entry( x,y,tile_entry );
nkeynes@736
   611
            }
nkeynes@736
   612
        }
nkeynes@736
   613
        ta_status.last_triangle_bounds.x1 = polygon_bound.x1;
nkeynes@736
   614
        ta_status.last_triangle_bounds.y1 = polygon_bound.y1;
nkeynes@736
   615
        ta_status.last_triangle_bounds.x2 = polygon_bound.x2;
nkeynes@736
   616
        ta_status.last_triangle_bounds.y2 = polygon_bound.y2;
nkeynes@189
   617
    } else if( ta_status.current_vertex_type == TA_VERTEX_SPRITE ||
nkeynes@736
   618
            ta_status.current_vertex_type == TA_VERTEX_TEX_SPRITE ) {
nkeynes@736
   619
        tile_entry |= 0xA0000000;
nkeynes@736
   620
        for( y=polygon_bound.y1; y<=polygon_bound.y2; y++ ) {
nkeynes@736
   621
            for( x=polygon_bound.x1; x<=polygon_bound.x2; x++ ) {
nkeynes@736
   622
                ta_write_tile_entry( x,y,tile_entry );
nkeynes@736
   623
            }
nkeynes@736
   624
        }
nkeynes@736
   625
        ta_status.last_triangle_bounds.x1 = polygon_bound.x1;
nkeynes@736
   626
        ta_status.last_triangle_bounds.y1 = polygon_bound.y1;
nkeynes@736
   627
        ta_status.last_triangle_bounds.x2 = polygon_bound.x2;
nkeynes@736
   628
        ta_status.last_triangle_bounds.y2 = polygon_bound.y2;
nkeynes@189
   629
    } else {
nkeynes@736
   630
        for( y=polygon_bound.y1; y<=polygon_bound.y2; y++ ) {
nkeynes@736
   631
            for( x=polygon_bound.x1; x<=polygon_bound.x2; x++ ) {
nkeynes@736
   632
                uint32_t entry = tile_entry;
nkeynes@736
   633
                for( i=0; i<ta_status.vertex_count-2; i++ ) {
nkeynes@736
   634
                    if( triangle_bound[i].x1 <= x && triangle_bound[i].x2 >= x &&
nkeynes@736
   635
                            triangle_bound[i].y1 <= y && triangle_bound[i].y2 >= y ) {
nkeynes@736
   636
                        entry |= (0x40000000>>i);
nkeynes@736
   637
                    }
nkeynes@736
   638
                }
nkeynes@736
   639
                ta_write_tile_entry( x, y, entry );
nkeynes@736
   640
            }
nkeynes@736
   641
        }
nkeynes@736
   642
        ta_status.last_triangle_bounds.x1 = -1;
nkeynes@189
   643
    }
nkeynes@189
   644
}
nkeynes@189
   645
nkeynes@189
   646
/**
nkeynes@189
   647
 * Variant of ta_split_polygon called when vertex_count == max_vertex, but 
nkeynes@189
   648
 * the client hasn't sent the LAST VERTEX flag. Commit the poly as normal
nkeynes@189
   649
 * first, then start a new poly with the first 2 vertexes taken from the 
nkeynes@189
   650
 * current one.
nkeynes@189
   651
 */
nkeynes@189
   652
static void ta_split_polygon() {
nkeynes@189
   653
    ta_commit_polygon();
nkeynes@189
   654
    if( TA_IS_NORMAL_POLY() ) { 
nkeynes@736
   655
        /* This only applies to ordinary polys - Sprites + modifier lists are
nkeynes@736
   656
         * handled differently
nkeynes@736
   657
         */
nkeynes@736
   658
        if( ta_status.vertex_count == 3 ) {
nkeynes@736
   659
            /* Triangles use an odd/even scheme */
nkeynes@736
   660
            if( ta_status.poly_parity == 0 ) {
nkeynes@736
   661
                memcpy( &ta_status.poly_vertex[0], &ta_status.poly_vertex[2], 
nkeynes@736
   662
                        sizeof(struct pvr2_ta_vertex) );
nkeynes@736
   663
                ta_status.poly_parity = 1;
nkeynes@736
   664
            } else {
nkeynes@736
   665
                memcpy( &ta_status.poly_vertex[1], &ta_status.poly_vertex[2],
nkeynes@736
   666
                        sizeof(struct pvr2_ta_vertex) );
nkeynes@736
   667
                ta_status.poly_parity = 0;
nkeynes@736
   668
            }
nkeynes@736
   669
        } else {
nkeynes@736
   670
            /* Everything else just uses the last 2 vertexes in order */
nkeynes@736
   671
            memcpy( &ta_status.poly_vertex[0], &ta_status.poly_vertex[ta_status.vertex_count-2], 
nkeynes@736
   672
                    sizeof(struct pvr2_ta_vertex)*2 );
nkeynes@736
   673
            ta_status.poly_parity = 0;
nkeynes@736
   674
        }
nkeynes@736
   675
        ta_status.vertex_count = 2;
nkeynes@189
   676
    } else {
nkeynes@736
   677
        ta_status.vertex_count = 0;
nkeynes@189
   678
    }
nkeynes@189
   679
}
nkeynes@189
   680
nkeynes@189
   681
/**
nkeynes@189
   682
 * Parse the polygon context block and setup the internal state to receive
nkeynes@189
   683
 * vertexes.
nkeynes@189
   684
 * @param data 32 bytes of parameter data.
nkeynes@189
   685
 */
nkeynes@189
   686
static void ta_parse_polygon_context( union ta_data *data ) {
nkeynes@189
   687
    int colourfmt = TA_POLYCMD_COLOURFMT(data[0].i);
nkeynes@194
   688
    if( TA_POLYCMD_USELENGTH(data[0].i) ) {
nkeynes@736
   689
        ta_status.max_vertex = TA_POLYCMD_LENGTH(data[0].i);
nkeynes@194
   690
    }
nkeynes@203
   691
    ta_status.clip_mode = TA_POLYCMD_CLIP(data[0].i);
nkeynes@203
   692
    if( ta_status.clip_mode == 1 ) { /* Reserved - treat as CLIP_INSIDE */
nkeynes@736
   693
        ta_status.clip_mode = TA_POLYCMD_CLIP_INSIDE;
nkeynes@203
   694
    }
nkeynes@189
   695
    ta_status.vertex_count = 0;
nkeynes@189
   696
    ta_status.poly_context[0] = 
nkeynes@736
   697
        (data[1].i & 0xFC1FFFFF) | ((data[0].i & 0x0B) << 22);
nkeynes@189
   698
    ta_status.poly_context[1] = data[2].i;
nkeynes@189
   699
    ta_status.poly_context[3] = data[4].i;
nkeynes@189
   700
    ta_status.poly_parity = 0;
nkeynes@189
   701
    if( data[0].i & TA_POLYCMD_TEXTURED ) {
nkeynes@736
   702
        ta_status.current_vertex_type = data[0].i & 0x0D;
nkeynes@736
   703
        ta_status.poly_context[2] = data[3].i;
nkeynes@736
   704
        ta_status.poly_context[4] = data[5].i;
nkeynes@736
   705
        if( data[0].i & TA_POLYCMD_SPECULAR ) {
nkeynes@736
   706
            ta_status.poly_context[0] |= 0x01000000;
nkeynes@736
   707
            ta_status.poly_vertex_size = 4;
nkeynes@736
   708
        } else {
nkeynes@736
   709
            ta_status.poly_vertex_size = 3;
nkeynes@736
   710
        }
nkeynes@736
   711
        if( data[0].i & TA_POLYCMD_UV16 ) {
nkeynes@736
   712
            ta_status.poly_vertex_size--;
nkeynes@736
   713
        }
nkeynes@189
   714
    } else {
nkeynes@736
   715
        ta_status.current_vertex_type = 0;
nkeynes@736
   716
        ta_status.poly_vertex_size = 1;
nkeynes@736
   717
        ta_status.poly_context[2] = 0;
nkeynes@736
   718
        ta_status.poly_context[4] = 0;
nkeynes@189
   719
    }
nkeynes@189
   720
nkeynes@189
   721
    ta_status.poly_pointer = (ta_status.poly_vertex_size << 21);
nkeynes@189
   722
    ta_status.poly_context_size = 3;
nkeynes@189
   723
    if( data[0].i & TA_POLYCMD_MODIFIED ) {
nkeynes@736
   724
        ta_status.poly_pointer |= 0x01000000;
nkeynes@736
   725
        if( data[0].i & TA_POLYCMD_FULLMOD ) {
nkeynes@736
   726
            ta_status.poly_context_size = 5;
nkeynes@736
   727
            ta_status.poly_vertex_size <<= 1;
nkeynes@736
   728
            ta_status.current_vertex_type |= 0x40;
nkeynes@736
   729
            /* Modified/float not supported - behaves as per last intensity */
nkeynes@736
   730
            if( colourfmt == TA_POLYCMD_COLOURFMT_FLOAT ) {
nkeynes@736
   731
                colourfmt = TA_POLYCMD_COLOURFMT_LASTINT;
nkeynes@736
   732
            }
nkeynes@736
   733
        }
nkeynes@189
   734
    }
nkeynes@736
   735
nkeynes@189
   736
    if( colourfmt == TA_POLYCMD_COLOURFMT_INTENSITY ) {
nkeynes@736
   737
        if( TA_POLYCMD_IS_FULLMOD(data[0].i) ||
nkeynes@736
   738
                TA_POLYCMD_IS_SPECULAR(data[0].i) ) {
nkeynes@736
   739
            ta_status.state = STATE_EXPECT_POLY_BLOCK2;
nkeynes@736
   740
        } else {
nkeynes@736
   741
            ta_status.intensity1 = 
nkeynes@736
   742
                parse_float_colour( data[4].f, data[5].f, data[6].f, data[7].f );
nkeynes@736
   743
        }
nkeynes@189
   744
    } else if( colourfmt == TA_POLYCMD_COLOURFMT_LASTINT ) {
nkeynes@736
   745
        colourfmt = TA_POLYCMD_COLOURFMT_INTENSITY;
nkeynes@189
   746
    }
nkeynes@189
   747
nkeynes@189
   748
    ta_status.current_vertex_type |= colourfmt;
nkeynes@189
   749
}
nkeynes@189
   750
nkeynes@189
   751
/**
nkeynes@189
   752
 * Parse the modifier volume context block and setup the internal state to 
nkeynes@189
   753
 * receive modifier vertexes.
nkeynes@189
   754
 * @param data 32 bytes of parameter data.
nkeynes@189
   755
 */
nkeynes@189
   756
static void ta_parse_modifier_context( union ta_data *data ) {
nkeynes@189
   757
    ta_status.current_vertex_type = TA_VERTEX_MOD_VOLUME;
nkeynes@189
   758
    ta_status.poly_vertex_size = 0;
nkeynes@206
   759
    ta_status.clip_mode = TA_POLYCMD_CLIP(data[0].i);
nkeynes@206
   760
    if( ta_status.clip_mode == 1 ) { /* Reserved - treat as CLIP_INSIDE */
nkeynes@736
   761
        ta_status.clip_mode = TA_POLYCMD_CLIP_INSIDE;
nkeynes@206
   762
    }
nkeynes@189
   763
    ta_status.poly_context_size = 3;
nkeynes@189
   764
    ta_status.poly_context[0] = (data[1].i & 0xFC1FFFFF) |
nkeynes@736
   765
    ((data[0].i & 0x0B)<<22);
nkeynes@189
   766
    if( TA_POLYCMD_IS_SPECULAR(data[0].i) ) {
nkeynes@736
   767
        ta_status.poly_context[0] |= 0x01000000;
nkeynes@189
   768
    }
nkeynes@189
   769
    ta_status.poly_context[1] = 0;
nkeynes@189
   770
    ta_status.poly_context[2] = 0;
nkeynes@189
   771
    ta_status.vertex_count = 0;
nkeynes@189
   772
    ta_status.max_vertex = 3;
nkeynes@189
   773
    ta_status.poly_pointer = 0;
nkeynes@189
   774
}
nkeynes@189
   775
nkeynes@189
   776
/**
nkeynes@189
   777
 * Parse the sprite context block and setup the internal state to receive
nkeynes@189
   778
 * vertexes.
nkeynes@189
   779
 * @param data 32 bytes of parameter data.
nkeynes@189
   780
 */
nkeynes@189
   781
static void ta_parse_sprite_context( union ta_data *data ) {
nkeynes@189
   782
    ta_status.poly_context_size = 3;
nkeynes@189
   783
    ta_status.poly_context[0] = (data[1].i & 0xFC1FFFFF) |
nkeynes@736
   784
    ((data[0].i & 0x0B)<<22) | 0x00400000;
nkeynes@340
   785
    ta_status.clip_mode = TA_POLYCMD_CLIP(data[0].i);
nkeynes@340
   786
    if( ta_status.clip_mode == 1 ) { /* Reserved - treat as CLIP_INSIDE */
nkeynes@736
   787
        ta_status.clip_mode = TA_POLYCMD_CLIP_INSIDE;
nkeynes@340
   788
    }
nkeynes@189
   789
    if( TA_POLYCMD_IS_SPECULAR(data[0].i) ) {
nkeynes@736
   790
        ta_status.poly_context[0] |= 0x01000000;
nkeynes@189
   791
    }
nkeynes@189
   792
    ta_status.poly_context[1] = data[2].i;
nkeynes@189
   793
    ta_status.poly_context[2] = data[3].i;
nkeynes@189
   794
    if( data[0].i & TA_POLYCMD_TEXTURED ) {
nkeynes@736
   795
        ta_status.poly_vertex_size = 2;
nkeynes@736
   796
        ta_status.poly_vertex[2].detail[1] = data[4].i;
nkeynes@736
   797
        ta_status.current_vertex_type = TA_VERTEX_TEX_SPRITE;
nkeynes@189
   798
    } else {
nkeynes@736
   799
        ta_status.poly_vertex_size = 1;
nkeynes@736
   800
        ta_status.poly_vertex[2].detail[0] = data[4].i;
nkeynes@736
   801
        ta_status.current_vertex_type = TA_VERTEX_SPRITE;
nkeynes@189
   802
    }
nkeynes@189
   803
    ta_status.vertex_count = 0;
nkeynes@189
   804
    ta_status.max_vertex = 4;
nkeynes@189
   805
    ta_status.poly_pointer = (ta_status.poly_vertex_size << 21);
nkeynes@189
   806
}
nkeynes@189
   807
nkeynes@189
   808
/**
nkeynes@189
   809
 * Copy the last read vertex into all vertexes up to max_vertex. Used for
nkeynes@189
   810
 * Aborted polygons under some circumstances.
nkeynes@189
   811
 */
nkeynes@189
   812
static void ta_fill_vertexes( ) {
nkeynes@189
   813
    int i;
nkeynes@189
   814
    for( i=ta_status.vertex_count; i<ta_status.max_vertex; i++ ) {
nkeynes@736
   815
        memcpy( &ta_status.poly_vertex[i], &ta_status.poly_vertex[ta_status.vertex_count-1],
nkeynes@736
   816
                sizeof( struct pvr2_ta_vertex ) );
nkeynes@189
   817
    }
nkeynes@189
   818
}
nkeynes@189
   819
nkeynes@189
   820
static void ta_parse_vertex( union ta_data *data ) {
nkeynes@189
   821
    struct pvr2_ta_vertex *vertex = &ta_status.poly_vertex[ta_status.vertex_count];
nkeynes@189
   822
    vertex->x = data[1].f;
nkeynes@189
   823
    vertex->y = data[2].f;
nkeynes@189
   824
    vertex->z = data[3].f;
nkeynes@189
   825
nkeynes@189
   826
    switch( ta_status.current_vertex_type ) {
nkeynes@189
   827
    case TA_VERTEX_PACKED:
nkeynes@736
   828
        vertex->detail[0] = data[6].i;
nkeynes@736
   829
        break;
nkeynes@189
   830
    case TA_VERTEX_FLOAT:
nkeynes@736
   831
        vertex->detail[0] = parse_float_colour( data[4].f, data[5].f, data[6].f, data[7].f );
nkeynes@736
   832
        break;
nkeynes@189
   833
    case TA_VERTEX_INTENSITY:
nkeynes@736
   834
        vertex->detail[0] = parse_intensity_colour( ta_status.intensity1, data[6].f );
nkeynes@736
   835
        break;
nkeynes@189
   836
nkeynes@189
   837
    case TA_VERTEX_TEX_SPEC_PACKED:
nkeynes@736
   838
        vertex->detail[3] = data[7].i; /* ARGB */
nkeynes@736
   839
        /* Fallthrough */
nkeynes@189
   840
    case TA_VERTEX_TEX_PACKED:
nkeynes@736
   841
        vertex->detail[0] = data[4].i; /* U */
nkeynes@736
   842
        vertex->detail[1] = data[5].i; /* V */
nkeynes@736
   843
        vertex->detail[2] = data[6].i; /* ARGB */
nkeynes@736
   844
        break;
nkeynes@189
   845
    case TA_VERTEX_TEX_UV16_SPEC_PACKED:
nkeynes@736
   846
        vertex->detail[2] = data[7].i; /* ARGB */
nkeynes@736
   847
        /* Fallthrough */
nkeynes@189
   848
    case TA_VERTEX_TEX_UV16_PACKED:
nkeynes@736
   849
        vertex->detail[0] = data[4].i; /* UV */
nkeynes@736
   850
        vertex->detail[1] = data[6].i; /* ARGB */
nkeynes@736
   851
        break;
nkeynes@189
   852
nkeynes@189
   853
    case TA_VERTEX_TEX_FLOAT:
nkeynes@189
   854
    case TA_VERTEX_TEX_SPEC_FLOAT:
nkeynes@736
   855
        vertex->detail[0] = data[4].i; /* U */
nkeynes@736
   856
        vertex->detail[1] = data[5].i; /* UV */
nkeynes@736
   857
        ta_status.state = STATE_EXPECT_VERTEX_BLOCK2;
nkeynes@736
   858
        break;
nkeynes@189
   859
    case TA_VERTEX_TEX_UV16_FLOAT:
nkeynes@189
   860
    case TA_VERTEX_TEX_UV16_SPEC_FLOAT:
nkeynes@736
   861
        vertex->detail[0] = data[4].i; /* UV */
nkeynes@736
   862
        ta_status.state = STATE_EXPECT_VERTEX_BLOCK2;
nkeynes@736
   863
        break;
nkeynes@189
   864
nkeynes@189
   865
    case TA_VERTEX_TEX_SPEC_INTENSITY:
nkeynes@736
   866
        vertex->detail[3] = parse_intensity_colour( ta_status.intensity2, data[7].f );
nkeynes@736
   867
        /* Fallthrough */
nkeynes@189
   868
    case TA_VERTEX_TEX_INTENSITY:
nkeynes@736
   869
        vertex->detail[0] = data[4].i; /* U */
nkeynes@736
   870
        vertex->detail[1] = data[5].i; /* V */
nkeynes@736
   871
        vertex->detail[2] = parse_intensity_colour( ta_status.intensity1, data[6].f );
nkeynes@736
   872
        break;
nkeynes@189
   873
    case TA_VERTEX_TEX_UV16_SPEC_INTENSITY:
nkeynes@736
   874
        vertex->detail[2] = parse_intensity_colour( ta_status.intensity2, data[7].f );
nkeynes@736
   875
        /* Fallthrough */
nkeynes@189
   876
    case TA_VERTEX_TEX_UV16_INTENSITY:
nkeynes@736
   877
        vertex->detail[0] = data[4].i; /* UV */
nkeynes@736
   878
        vertex->detail[1] = parse_intensity_colour( ta_status.intensity1, data[6].f );
nkeynes@736
   879
        break;
nkeynes@189
   880
nkeynes@189
   881
    case TA_VERTEX_PACKED_MOD:
nkeynes@736
   882
        vertex->detail[0] = data[4].i; /* ARGB */
nkeynes@736
   883
        vertex->detail[1] = data[5].i; /* ARGB */
nkeynes@736
   884
        break;
nkeynes@189
   885
    case TA_VERTEX_INTENSITY_MOD:
nkeynes@736
   886
        vertex->detail[0] = parse_intensity_colour( ta_status.intensity1, data[4].f );
nkeynes@736
   887
        vertex->detail[1] = parse_intensity_colour( ta_status.intensity2, data[5].f );
nkeynes@736
   888
        break;
nkeynes@189
   889
nkeynes@189
   890
    case TA_VERTEX_TEX_SPEC_PACKED_MOD:
nkeynes@736
   891
        vertex->detail[3] = data[7].i; /* ARGB0 */
nkeynes@736
   892
        /* Fallthrough */
nkeynes@189
   893
    case TA_VERTEX_TEX_PACKED_MOD:
nkeynes@736
   894
        vertex->detail[0] = data[4].i; /* U0 */
nkeynes@736
   895
        vertex->detail[1] = data[5].i; /* V0 */
nkeynes@736
   896
        vertex->detail[2] = data[6].i; /* ARGB0 */
nkeynes@736
   897
        ta_status.state = STATE_EXPECT_VERTEX_BLOCK2;
nkeynes@736
   898
        break;
nkeynes@189
   899
    case TA_VERTEX_TEX_UV16_SPEC_PACKED_MOD:
nkeynes@736
   900
        vertex->detail[2] = data[7].i; /* ARGB0 */
nkeynes@736
   901
        /* Fallthrough */
nkeynes@189
   902
    case TA_VERTEX_TEX_UV16_PACKED_MOD:
nkeynes@736
   903
        vertex->detail[0] = data[4].i; /* UV0 */
nkeynes@736
   904
        vertex->detail[1] = data[6].i; /* ARGB0 */
nkeynes@736
   905
        ta_status.state = STATE_EXPECT_VERTEX_BLOCK2;
nkeynes@736
   906
        break;
nkeynes@189
   907
nkeynes@189
   908
    case TA_VERTEX_TEX_SPEC_INTENSITY_MOD:
nkeynes@736
   909
        vertex->detail[3] = parse_intensity_colour( ta_status.intensity1, data[7].f );
nkeynes@736
   910
        /* Fallthrough */
nkeynes@189
   911
    case TA_VERTEX_TEX_INTENSITY_MOD:
nkeynes@736
   912
        vertex->detail[0] = data[4].i; /* U0 */
nkeynes@736
   913
        vertex->detail[1] = data[5].i; /* V0 */
nkeynes@736
   914
        vertex->detail[2] = parse_intensity_colour( ta_status.intensity1, data[6].f );
nkeynes@736
   915
        ta_status.state = STATE_EXPECT_VERTEX_BLOCK2;
nkeynes@736
   916
        break;
nkeynes@189
   917
    case TA_VERTEX_TEX_UV16_SPEC_INTENSITY_MOD:
nkeynes@736
   918
        vertex->detail[2] = parse_intensity_colour( ta_status.intensity1, data[7].f );
nkeynes@736
   919
        /* Fallthrough */
nkeynes@189
   920
    case TA_VERTEX_TEX_UV16_INTENSITY_MOD:
nkeynes@736
   921
        vertex->detail[0] = data[4].i; /* UV0 */
nkeynes@736
   922
        vertex->detail[1] = parse_intensity_colour( ta_status.intensity1, data[6].f );
nkeynes@736
   923
        ta_status.state = STATE_EXPECT_VERTEX_BLOCK2;
nkeynes@736
   924
        break;
nkeynes@736
   925
nkeynes@189
   926
    case TA_VERTEX_SPRITE:
nkeynes@189
   927
    case TA_VERTEX_TEX_SPRITE:
nkeynes@189
   928
    case TA_VERTEX_MOD_VOLUME:
nkeynes@206
   929
    case TA_VERTEX_LISTLESS:
nkeynes@736
   930
        vertex++;
nkeynes@736
   931
        vertex->x = data[4].f;
nkeynes@736
   932
        vertex->y = data[5].f;
nkeynes@736
   933
        vertex->z = data[6].f;
nkeynes@736
   934
        vertex++;
nkeynes@736
   935
        vertex->x = data[7].f;
nkeynes@736
   936
        ta_status.vertex_count += 2;
nkeynes@736
   937
        ta_status.state = STATE_EXPECT_VERTEX_BLOCK2;
nkeynes@736
   938
        break;
nkeynes@189
   939
    }
nkeynes@189
   940
    ta_status.vertex_count++;
nkeynes@189
   941
}
nkeynes@189
   942
nkeynes@189
   943
static void ta_parse_vertex_block2( union ta_data *data ) {
nkeynes@189
   944
    struct pvr2_ta_vertex *vertex = &ta_status.poly_vertex[ta_status.vertex_count-1];
nkeynes@189
   945
nkeynes@189
   946
    switch( ta_status.current_vertex_type ) {
nkeynes@189
   947
    case TA_VERTEX_TEX_SPEC_FLOAT:
nkeynes@736
   948
        vertex->detail[3] = parse_float_colour( data[4].f, data[5].f, data[6].f, data[7].f );
nkeynes@736
   949
        /* Fallthrough */
nkeynes@189
   950
    case TA_VERTEX_TEX_FLOAT:
nkeynes@736
   951
        vertex->detail[2] = parse_float_colour( data[0].f, data[1].f, data[2].f, data[3].f );
nkeynes@736
   952
        break;
nkeynes@189
   953
    case TA_VERTEX_TEX_UV16_SPEC_FLOAT:
nkeynes@736
   954
        vertex->detail[2] = parse_float_colour( data[4].f, data[5].f, data[6].f, data[7].f );
nkeynes@736
   955
        /* Fallthrough */
nkeynes@189
   956
    case TA_VERTEX_TEX_UV16_FLOAT:
nkeynes@736
   957
        vertex->detail[1] = parse_float_colour( data[0].f, data[1].f, data[2].f, data[3].f );
nkeynes@736
   958
        break;
nkeynes@189
   959
    case TA_VERTEX_TEX_PACKED_MOD:
nkeynes@736
   960
        vertex->detail[3] = data[0].i; /* U1 */
nkeynes@736
   961
        vertex->detail[4] = data[1].i; /* V1 */
nkeynes@736
   962
        vertex->detail[5] = data[2].i; /* ARGB1 */
nkeynes@736
   963
        break;
nkeynes@189
   964
    case TA_VERTEX_TEX_SPEC_PACKED_MOD:
nkeynes@736
   965
        vertex->detail[4] = data[0].i; /* U1 */
nkeynes@736
   966
        vertex->detail[5] = data[1].i; /* V1 */
nkeynes@736
   967
        vertex->detail[6] = data[2].i; /* ARGB1 */
nkeynes@736
   968
        vertex->detail[7] = data[3].i; /* ARGB1 */
nkeynes@736
   969
        break;
nkeynes@189
   970
    case TA_VERTEX_TEX_UV16_PACKED_MOD:
nkeynes@736
   971
        vertex->detail[2] = data[0].i; /* UV1 */
nkeynes@736
   972
        vertex->detail[3] = data[2].i; /* ARGB1 */
nkeynes@736
   973
        break;
nkeynes@189
   974
    case TA_VERTEX_TEX_UV16_SPEC_PACKED_MOD:
nkeynes@736
   975
        vertex->detail[3] = data[0].i; /* UV1 */
nkeynes@736
   976
        vertex->detail[4] = data[2].i; /* ARGB1 */
nkeynes@736
   977
        vertex->detail[5] = data[3].i; /* ARGB1 */
nkeynes@736
   978
        break;
nkeynes@189
   979
nkeynes@189
   980
    case TA_VERTEX_TEX_INTENSITY_MOD:
nkeynes@736
   981
        vertex->detail[3] = data[0].i; /* U1 */
nkeynes@736
   982
        vertex->detail[4] = data[1].i; /* V1 */
nkeynes@736
   983
        vertex->detail[5] = parse_intensity_colour( ta_status.intensity2, data[2].f ); /* ARGB1 */
nkeynes@736
   984
        break;
nkeynes@189
   985
    case TA_VERTEX_TEX_SPEC_INTENSITY_MOD:
nkeynes@736
   986
        vertex->detail[4] = data[0].i; /* U1 */
nkeynes@736
   987
        vertex->detail[5] = data[1].i; /* V1 */
nkeynes@736
   988
        vertex->detail[6] = parse_intensity_colour( ta_status.intensity2, data[2].f ); /* ARGB1 */
nkeynes@736
   989
        vertex->detail[7] = parse_intensity_colour( ta_status.intensity2, data[3].f ); /* ARGB1 */
nkeynes@736
   990
        break;
nkeynes@189
   991
    case TA_VERTEX_TEX_UV16_INTENSITY_MOD:
nkeynes@736
   992
        vertex->detail[2] = data[0].i; /* UV1 */
nkeynes@736
   993
        vertex->detail[3] = parse_intensity_colour( ta_status.intensity2, data[2].f ); /* ARGB1 */
nkeynes@736
   994
        break;
nkeynes@189
   995
    case TA_VERTEX_TEX_UV16_SPEC_INTENSITY_MOD:
nkeynes@736
   996
        vertex->detail[3] = data[0].i; /* UV1 */
nkeynes@736
   997
        vertex->detail[4] = parse_intensity_colour( ta_status.intensity2, data[2].f ); /* ARGB1 */
nkeynes@736
   998
        vertex->detail[5] = parse_intensity_colour( ta_status.intensity2, data[3].f ); /* ARGB1 */
nkeynes@736
   999
        break;
nkeynes@189
  1000
nkeynes@189
  1001
    case TA_VERTEX_SPRITE:
nkeynes@736
  1002
        vertex->y = data[0].f;
nkeynes@736
  1003
        vertex->z = data[1].f;
nkeynes@736
  1004
        vertex++;
nkeynes@736
  1005
        ta_status.vertex_count++;
nkeynes@736
  1006
        vertex->x = data[2].f;
nkeynes@736
  1007
        vertex->y = data[3].f;
nkeynes@736
  1008
        vertex->z = 0;
nkeynes@736
  1009
        vertex->detail[0] = 0;
nkeynes@736
  1010
        ta_status.poly_vertex[0].detail[0] = 0;
nkeynes@736
  1011
        ta_status.poly_vertex[1].detail[0] = 0;
nkeynes@736
  1012
        break;
nkeynes@189
  1013
    case TA_VERTEX_TEX_SPRITE:
nkeynes@736
  1014
        vertex->y = data[0].f;
nkeynes@736
  1015
        vertex->z = data[1].f;
nkeynes@736
  1016
        vertex++;
nkeynes@736
  1017
        ta_status.vertex_count++;
nkeynes@736
  1018
        vertex->x = data[2].f;
nkeynes@736
  1019
        vertex->y = data[3].f;
nkeynes@736
  1020
        vertex->z = 0;
nkeynes@736
  1021
        vertex->detail[0] = 0;
nkeynes@736
  1022
        vertex->detail[1] = 0;
nkeynes@736
  1023
        ta_status.poly_vertex[0].detail[0] = data[5].i;
nkeynes@736
  1024
        ta_status.poly_vertex[0].detail[1] = 0;
nkeynes@736
  1025
        ta_status.poly_vertex[1].detail[0] = data[6].i;
nkeynes@736
  1026
        ta_status.poly_vertex[1].detail[1] = 0;
nkeynes@736
  1027
        ta_status.poly_vertex[2].detail[0] = data[7].i;
nkeynes@736
  1028
        break;
nkeynes@189
  1029
    case TA_VERTEX_MOD_VOLUME:
nkeynes@206
  1030
    case TA_VERTEX_LISTLESS:
nkeynes@736
  1031
        vertex->y = data[0].f;
nkeynes@736
  1032
        vertex->z = data[1].f;
nkeynes@736
  1033
        break;
nkeynes@189
  1034
    }
nkeynes@194
  1035
    ta_status.state = STATE_IN_POLYGON;
nkeynes@189
  1036
}
nkeynes@189
  1037
nkeynes@189
  1038
/**
nkeynes@189
  1039
 * Process 1 32-byte block of ta data
nkeynes@189
  1040
 */
nkeynes@429
  1041
void pvr2_ta_process_block( unsigned char *input ) {
nkeynes@189
  1042
    union ta_data *data = (union ta_data *)input;
nkeynes@189
  1043
nkeynes@189
  1044
    switch( ta_status.state ) {
nkeynes@189
  1045
    case STATE_ERROR:
nkeynes@736
  1046
        /* Fatal error raised - stop processing until reset */
nkeynes@736
  1047
        return;
nkeynes@189
  1048
nkeynes@189
  1049
    case STATE_EXPECT_POLY_BLOCK2:
nkeynes@736
  1050
        /* This is always a pair of floating-point colours */
nkeynes@736
  1051
        ta_status.intensity1 = 
nkeynes@736
  1052
            parse_float_colour( data[0].f, data[1].f, data[2].f, data[3].f );
nkeynes@736
  1053
        ta_status.intensity2 =
nkeynes@736
  1054
            parse_float_colour( data[4].f, data[5].f, data[6].f, data[7].f );
nkeynes@736
  1055
        ta_status.state = STATE_IN_LIST;
nkeynes@736
  1056
        break;
nkeynes@189
  1057
nkeynes@189
  1058
    case STATE_EXPECT_VERTEX_BLOCK2:
nkeynes@736
  1059
        ta_parse_vertex_block2( data );
nkeynes@736
  1060
        if( ta_status.vertex_count == ta_status.max_vertex ) {
nkeynes@736
  1061
            ta_split_polygon();
nkeynes@736
  1062
        }
nkeynes@736
  1063
        break;
nkeynes@189
  1064
nkeynes@189
  1065
    case STATE_EXPECT_END_VERTEX_BLOCK2:
nkeynes@736
  1066
        ta_parse_vertex_block2( data );
nkeynes@736
  1067
        if( ta_status.vertex_count < 3 ) {
nkeynes@736
  1068
            ta_bad_input_error();
nkeynes@736
  1069
        } else {
nkeynes@736
  1070
            ta_commit_polygon();
nkeynes@736
  1071
        }
nkeynes@736
  1072
        ta_status.vertex_count = 0;
nkeynes@736
  1073
        ta_status.poly_parity = 0;
nkeynes@736
  1074
        ta_status.state = STATE_IN_LIST;
nkeynes@736
  1075
        break;
nkeynes@189
  1076
    case STATE_IN_LIST:
nkeynes@194
  1077
    case STATE_IN_POLYGON:
nkeynes@189
  1078
    case STATE_IDLE:
nkeynes@736
  1079
        switch( TA_CMD( data->i ) ) {
nkeynes@736
  1080
        case TA_CMD_END_LIST:
nkeynes@736
  1081
            if( ta_status.state == STATE_IN_POLYGON ) {
nkeynes@736
  1082
                ta_bad_input_error();
nkeynes@736
  1083
                ta_end_list();
nkeynes@736
  1084
                ta_status.state = STATE_ERROR; /* Abort further processing */
nkeynes@736
  1085
            } else {
nkeynes@736
  1086
                ta_end_list();
nkeynes@736
  1087
            }
nkeynes@736
  1088
            break;
nkeynes@736
  1089
        case TA_CMD_CLIP:
nkeynes@736
  1090
            if( ta_status.state == STATE_IN_POLYGON ) {
nkeynes@736
  1091
                ta_bad_input_error();
nkeynes@736
  1092
                ta_status.accept_vertexes = FALSE;
nkeynes@736
  1093
                /* Enter stuffed up mode */
nkeynes@736
  1094
            }
nkeynes@736
  1095
            ta_status.clip.x1 = data[4].i & 0x3F;
nkeynes@736
  1096
            ta_status.clip.y1 = data[5].i & 0x0F;
nkeynes@736
  1097
            ta_status.clip.x2 = data[6].i & 0x3F;
nkeynes@736
  1098
            ta_status.clip.y2 = data[7].i & 0x0F;
nkeynes@736
  1099
            if( ta_status.clip.x2 >= ta_status.width )
nkeynes@736
  1100
                ta_status.clip.x2 = ta_status.width - 1;
nkeynes@736
  1101
            if( ta_status.clip.y2 >= ta_status.height )
nkeynes@736
  1102
                ta_status.clip.y2 = ta_status.height - 1;
nkeynes@736
  1103
            break;
nkeynes@736
  1104
        case TA_CMD_POLYGON_CONTEXT:
nkeynes@736
  1105
            if( ta_status.state == STATE_IDLE ) {
nkeynes@736
  1106
                ta_init_list( TA_POLYCMD_LISTTYPE( data->i ) );
nkeynes@736
  1107
            }
nkeynes@189
  1108
nkeynes@736
  1109
            if( ta_status.vertex_count != 0 ) {
nkeynes@736
  1110
                /* Error, and not a very well handled one either */
nkeynes@736
  1111
                ta_bad_input_error();
nkeynes@736
  1112
                ta_status.accept_vertexes = FALSE;
nkeynes@736
  1113
            } else {
nkeynes@736
  1114
                if( TA_IS_MODIFIER_LIST( ta_status.current_list_type ) ) {
nkeynes@736
  1115
                    ta_parse_modifier_context(data);
nkeynes@736
  1116
                } else {
nkeynes@736
  1117
                    ta_parse_polygon_context(data);
nkeynes@736
  1118
                }
nkeynes@736
  1119
            }
nkeynes@736
  1120
            break;
nkeynes@736
  1121
        case TA_CMD_SPRITE_CONTEXT:
nkeynes@736
  1122
            if( ta_status.state == STATE_IDLE ) {
nkeynes@736
  1123
                ta_init_list( TA_POLYCMD_LISTTYPE( data->i ) );
nkeynes@736
  1124
            }
nkeynes@189
  1125
nkeynes@736
  1126
            if( ta_status.vertex_count != 0 ) {
nkeynes@736
  1127
                ta_fill_vertexes();
nkeynes@736
  1128
                ta_commit_polygon();
nkeynes@736
  1129
            }
nkeynes@736
  1130
nkeynes@736
  1131
            ta_parse_sprite_context(data);
nkeynes@736
  1132
            break;
nkeynes@736
  1133
        case TA_CMD_VERTEX:
nkeynes@736
  1134
            ta_status.state = STATE_IN_POLYGON;
nkeynes@736
  1135
            ta_parse_vertex(data);
nkeynes@736
  1136
nkeynes@736
  1137
            if( ta_status.state == STATE_EXPECT_VERTEX_BLOCK2 ) {
nkeynes@736
  1138
                if( TA_IS_END_VERTEX(data[0].i) ) {
nkeynes@736
  1139
                    ta_status.state = STATE_EXPECT_END_VERTEX_BLOCK2;
nkeynes@736
  1140
                }
nkeynes@736
  1141
            } else if( TA_IS_END_VERTEX(data->i) ) {
nkeynes@736
  1142
                if( ta_status.vertex_count < 3 ) {
nkeynes@736
  1143
                    ta_bad_input_error();
nkeynes@736
  1144
                } else {
nkeynes@736
  1145
                    ta_commit_polygon();
nkeynes@736
  1146
                }
nkeynes@736
  1147
                ta_status.vertex_count = 0;
nkeynes@736
  1148
                ta_status.poly_parity = 0;
nkeynes@736
  1149
                ta_status.state = STATE_IN_LIST;
nkeynes@736
  1150
            } else if( ta_status.vertex_count == ta_status.max_vertex ) {
nkeynes@736
  1151
                ta_split_polygon();
nkeynes@736
  1152
            }
nkeynes@736
  1153
            break;
nkeynes@736
  1154
        default:
nkeynes@736
  1155
            if( ta_status.state == STATE_IN_POLYGON ) {
nkeynes@736
  1156
                ta_bad_input_error();
nkeynes@736
  1157
            }
nkeynes@736
  1158
        }
nkeynes@736
  1159
        break;
nkeynes@189
  1160
    }
nkeynes@189
  1161
nkeynes@189
  1162
}
nkeynes@189
  1163
nkeynes@189
  1164
nkeynes@189
  1165
nkeynes@189
  1166
/**
nkeynes@189
  1167
 * Write a block of data to the tile accelerator, adding the data to the 
nkeynes@189
  1168
 * current scene. We don't make any particular attempt to interpret the data
nkeynes@189
  1169
 * at this stage, deferring that until render time.
nkeynes@189
  1170
 *
nkeynes@189
  1171
 * Currently copies the data verbatim to the vertex buffer, processing only
nkeynes@189
  1172
 * far enough to generate the correct end-of-list events. Tile buffer is
nkeynes@189
  1173
 * entirely ignored.
nkeynes@189
  1174
 */
nkeynes@429
  1175
void pvr2_ta_write( unsigned char *buf, uint32_t length )
nkeynes@189
  1176
{
nkeynes@189
  1177
    if( ta_status.debug_output ) {
nkeynes@736
  1178
        fwrite_dump32( (uint32_t *)buf, length, stderr );
nkeynes@189
  1179
    }
nkeynes@189
  1180
nkeynes@189
  1181
    for( ; length >=32; length -= 32 ) {
nkeynes@736
  1182
        pvr2_ta_process_block( buf );
nkeynes@736
  1183
        buf += 32;
nkeynes@189
  1184
    }
nkeynes@189
  1185
}
.