1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/*
* Authors:
* Keith Whitwell <keith@tungstengraphics.com>
*/
#ifndef DRAW_PT_H
#define DRAW_PT_H
#include "pipe/p_compiler.h"
typedef unsigned (*pt_elt_func)( const void *elts, unsigned idx );
struct draw_pt_middle_end;
struct draw_context;
/* We use the top couple of bits in the vertex fetch index to convey a
* little API information. This limits the number of vertices we can
* address to only 1 billion -- if that becomes a problem, these could
* be moved out & passed separately.
*/
#define DRAW_PT_EDGEFLAG (1<<30)
#define DRAW_PT_RESET_STIPPLE (1<<31)
#define DRAW_PT_FLAG_MASK (3<<30)
/* The "front end" - prepare sets of fetch, draw elements for the
* middle end.
*
* Currenly one version of this:
* - vcache - catchall implementation, decomposes to TRI/LINE/POINT prims
* Later:
* - varray, varray_split
* - velement, velement_split
*
* Currenly only using the vcache version.
*/
struct draw_pt_front_end {
void (*prepare)( struct draw_pt_front_end *,
unsigned prim,
struct draw_pt_middle_end *,
unsigned opt );
void (*run)( struct draw_pt_front_end *,
pt_elt_func elt_func,
const void *elt_ptr,
unsigned count );
void (*finish)( struct draw_pt_front_end * );
void (*destroy)( struct draw_pt_front_end * );
};
/* The "middle end" - prepares actual hardware vertices for the
* hardware backend.
*
* Currently two versions of this:
* - fetch, vertex shade, cliptest, prim-pipeline
* - fetch, emit (ie passthrough)
* Later:
* - fetch, vertex shade, cliptest, maybe-pipeline, maybe-emit
* - fetch, vertex shade, emit
*
* Currenly only using the passthrough version.
*/
struct draw_pt_middle_end {
void (*prepare)( struct draw_pt_middle_end *,
unsigned prim,
unsigned opt );
void (*run)( struct draw_pt_middle_end *,
const unsigned *fetch_elts,
unsigned fetch_count,
const ushort *draw_elts,
unsigned draw_count );
void (*finish)( struct draw_pt_middle_end * );
void (*destroy)( struct draw_pt_middle_end * );
};
/* The "back end" - supplied by the driver, defined in draw_vbuf.h.
*
* Not sure whether to wrap the prim pipeline up as an alternate
* backend. Would be a win for everything except pure passthrough
* mode...
*/
struct vbuf_render;
/* Helper functions.
*/
pt_elt_func draw_pt_elt_func( struct draw_context *draw );
const void *draw_pt_elt_ptr( struct draw_context *draw,
unsigned start );
/* Implementations:
*/
struct draw_pt_front_end *draw_pt_vcache( struct draw_context *draw );
struct draw_pt_middle_end *draw_pt_fetch_emit( struct draw_context *draw );
struct draw_pt_middle_end *draw_pt_fetch_pipeline( struct draw_context *draw );
struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit(struct draw_context *draw);
#endif
|
