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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/**************************************************************************
*
* 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;
#define PT_SHADE 0x1
#define PT_CLIPTEST 0x2
#define PT_PIPELINE 0x4
#define PT_MAX_MIDDLE 0x8
/* 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)
*/
struct draw_pt_middle_end {
void (*prepare)( struct draw_pt_middle_end *,
unsigned prim,
unsigned opt,
unsigned *max_vertices );
void (*run)( struct draw_pt_middle_end *,
const unsigned *fetch_elts,
unsigned fetch_count,
const ushort *draw_elts,
unsigned draw_count );
void (*run_linear)(struct draw_pt_middle_end *,
unsigned start,
unsigned count);
/* Transform all vertices in a linear range and then draw them with
* the supplied element list. May fail and return FALSE.
*/
boolean (*run_linear_elts)( struct draw_pt_middle_end *,
unsigned fetch_start,
unsigned fetch_count,
const ushort *draw_elts,
unsigned draw_count );
int (*get_max_vertex_count)( struct draw_pt_middle_end * );
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.
*/
struct vbuf_render;
struct vertex_header;
/* 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 );
/* Frontends:
*
* Currently only the general-purpose vcache implementation, could add
* a special case for tiny vertex buffers.
*/
struct draw_pt_front_end *draw_pt_vcache( struct draw_context *draw );
struct draw_pt_front_end *draw_pt_varray(struct draw_context *draw);
/* Middle-ends:
*
* Currently one general-purpose case which can do all possibilities,
* at the slight expense of creating a vertex_header in some cases
* unecessarily.
*
* The special case fetch_emit code avoids pipeline vertices
* altogether and builds hardware vertices directly from API
* vertex_elements.
*/
struct draw_pt_middle_end *draw_pt_fetch_emit( struct draw_context *draw );
struct draw_pt_middle_end *draw_pt_middle_fse( struct draw_context *draw );
struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit(struct draw_context *draw);
/* More helpers:
*/
boolean draw_pt_get_edgeflag( struct draw_context *draw,
unsigned idx );
/*******************************************************************************
* HW vertex emit:
*/
struct pt_emit;
void draw_pt_emit_prepare( struct pt_emit *emit,
unsigned prim,
unsigned *max_vertices );
void draw_pt_emit( struct pt_emit *emit,
const float (*vertex_data)[4],
unsigned vertex_count,
unsigned stride,
const ushort *elts,
unsigned count );
void draw_pt_emit_linear( struct pt_emit *emit,
const float (*vertex_data)[4],
unsigned vertex_count,
unsigned stride,
unsigned start,
unsigned count );
void draw_pt_emit_destroy( struct pt_emit *emit );
struct pt_emit *draw_pt_emit_create( struct draw_context *draw );
/*******************************************************************************
* API vertex fetch:
*/
struct pt_fetch;
void draw_pt_fetch_prepare( struct pt_fetch *fetch,
unsigned vertex_size );
void draw_pt_fetch_run( struct pt_fetch *fetch,
const unsigned *elts,
unsigned count,
char *verts );
void draw_pt_fetch_run_linear( struct pt_fetch *fetch,
unsigned start,
unsigned count,
char *verts );
void draw_pt_fetch_destroy( struct pt_fetch *fetch );
struct pt_fetch *draw_pt_fetch_create( struct draw_context *draw );
/*******************************************************************************
* Post-VS: cliptest, rhw, viewport
*/
struct pt_post_vs;
boolean draw_pt_post_vs_run( struct pt_post_vs *pvs,
struct vertex_header *pipeline_verts,
unsigned stride,
unsigned count );
void draw_pt_post_vs_prepare( struct pt_post_vs *pvs,
boolean bypass_clipping,
boolean identity_viewport,
boolean opengl );
struct pt_post_vs *draw_pt_post_vs_create( struct draw_context *draw );
void draw_pt_post_vs_destroy( struct pt_post_vs *pvs );
/*******************************************************************************
* Utils:
*/
void draw_pt_split_prim(unsigned prim, unsigned *first, unsigned *incr);
unsigned draw_pt_reduced_prim(unsigned prim);
#endif
|
