lxdream 0.9.1| filename | src/pvr2/ta.c |
| changeset | 100:995e42e96cc9 |
| next | 103:9b9cfc5855e0 |
| author | nkeynes |
| date | Wed Feb 15 13:11:50 2006 +0000 (16 years ago) |
| permissions | -rw-r--r-- |
| last change | Split pvr2.c out to separate files for TA and renderer, minor renames change pvrdma to use mem_copy_to_sh4 |
| view | annotate | diff | log | raw |
1 /**
2 * $Id: ta.c,v 1.1 2006-02-15 13:11:46 nkeynes Exp $
3 *
4 * PVR2 Tile Accelerator support. In principle this does a lot more work
5 * than is currently implemented - we cheat. A lot.
6 *
7 * Copyright (c) 2005 Nathan Keynes.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
20 #include "pvr2/pvr2.h"
21 #include "asic.h"
22 #include "dream.h"
24 /** Tile Accelerator */
26 struct tacmd {
27 uint32_t command;
28 uint32_t param1;
29 uint32_t param2;
30 uint32_t texture;
31 float alpha;
32 float red;
33 float green;
34 float blue;
35 };
37 struct vertex_type1 {
38 uint32_t command;
39 float x, y, z;
40 uint32_t blank, blank2;
41 uint32_t col;
42 float f;
43 };
45 /**
46 * (Re)initialize the tile accelerator in preparation for the next scene.
47 * Normally called immediately before commencing polygon transmission.
48 */
49 void pvr2_ta_init( void )
50 {
52 }
54 char pvr2ta_remainder[8];
55 unsigned int pvr2_last_poly_type = 0;
57 /**
58 * Write a block of data to the tile accelerator, adding the data to the
59 * current scene. We don't make any particular attempt to interpret the data
60 * at this stage, deferring that until render time.
61 */
62 void pvr2_ta_write( char *buf, uint32_t length )
63 {
64 int i;
65 struct tacmd *cmd_list = (struct tacmd *)buf;
66 int count = length >> 5;
67 for( i=0; i<count; i++ ){
68 unsigned int type = (cmd_list[i].command >> 24) & 0xFF;
69 if( type == 0xE0 || type == 0xF0 ) {
70 struct vertex_type1 *vert = (struct vertex_type1 *)&cmd_list[i];
71 DEBUG( "PVR2 vrt: %f %f %f %08X %08X %08X %f", vert->x, vert->y, vert->z, vert->blank, vert->blank2, vert->col, vert->f );
72 } else {
73 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 );
74 }
75 if( type == 0 ) {
76 /* End of list */
77 switch( pvr2_last_poly_type ) {
78 case 0x80: /* Opaque polys */
79 asic_event( EVENT_PVR_OPAQUE_DONE );
80 break;
81 case 0x81: /* Opaque poly modifier */
82 asic_event( EVENT_PVR_OPAQUEMOD_DONE );
83 break;
84 case 0x82: /* Transparent polys */
85 asic_event( EVENT_PVR_TRANS_DONE );
86 break;
87 case 0x83: /* Transparent poly modifier */
88 asic_event( EVENT_PVR_TRANSMOD_DONE );
89 break;
90 case 0x84: /* Punchthrough */
91 asic_event( EVENT_PVR_PUNCHOUT_DONE );
92 break;
93 }
94 pvr2_last_poly_type = 0;
95 } else if( type >= 0x80 && type <= 0x84 ) {
96 pvr2_last_poly_type = type;
97 }
98 }
99 }
.