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
|
/**************************************************************************
*
* 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>
*/
#include "pipe/p_util.h"
#include "pipe/p_defines.h"
#include "draw_private.h"
/**
* Rebuild the rendering pipeline.
*/
static struct draw_stage *validate_pipeline( struct draw_stage *stage )
{
struct draw_context *draw = stage->draw;
struct draw_stage *next = draw->pipeline.rasterize;
int need_det = 0;
int precalc_flat = 0;
/* Set the validate's next stage to the rasterize stage, so that it
* can be found later if needed for flushing.
*/
stage->next = next;
/*
* NOTE: we build up the pipeline in end-to-start order.
*
* TODO: make the current primitive part of the state and build
* shorter pipelines for lines & points.
*/
if ((draw->rasterizer->line_width != 1.0 && draw->convert_wide_lines) ||
(draw->rasterizer->point_size != 1.0 && draw->convert_wide_points) ||
draw->rasterizer->point_sprite) {
draw->pipeline.wide->next = next;
next = draw->pipeline.wide;
}
if (draw->rasterizer->line_stipple_enable) {
draw->pipeline.stipple->next = next;
next = draw->pipeline.stipple;
precalc_flat = 1; /* only needed for lines really */
}
if (draw->rasterizer->fill_cw != PIPE_POLYGON_MODE_FILL ||
draw->rasterizer->fill_ccw != PIPE_POLYGON_MODE_FILL) {
draw->pipeline.unfilled->next = next;
next = draw->pipeline.unfilled;
precalc_flat = 1; /* only needed for triangles really */
need_det = 1;
}
if (draw->rasterizer->flatshade && precalc_flat) {
draw->pipeline.flatshade->next = next;
next = draw->pipeline.flatshade;
}
if (draw->rasterizer->offset_cw ||
draw->rasterizer->offset_ccw) {
draw->pipeline.offset->next = next;
next = draw->pipeline.offset;
need_det = 1;
}
if (draw->rasterizer->light_twoside) {
draw->pipeline.twoside->next = next;
next = draw->pipeline.twoside;
need_det = 1;
}
/* Always run the cull stage as we calculate determinant there
* also.
*
* This can actually be a win as culling out the triangles can lead
* to less work emitting vertices, smaller vertex buffers, etc.
* It's difficult to say whether this will be true in general.
*/
if (need_det || draw->rasterizer->cull_mode) {
draw->pipeline.cull->next = next;
next = draw->pipeline.cull;
}
/* Clip stage
*/
if (!draw->rasterizer->bypass_clipping)
{
draw->pipeline.clip->next = next;
next = draw->pipeline.clip;
}
draw->pipeline.first = next;
return next;
}
static void validate_tri( struct draw_stage *stage,
struct prim_header *header )
{
struct draw_stage *pipeline = validate_pipeline( stage );
pipeline->tri( pipeline, header );
}
static void validate_line( struct draw_stage *stage,
struct prim_header *header )
{
struct draw_stage *pipeline = validate_pipeline( stage );
pipeline->line( pipeline, header );
}
static void validate_point( struct draw_stage *stage,
struct prim_header *header )
{
struct draw_stage *pipeline = validate_pipeline( stage );
pipeline->point( pipeline, header );
}
static void validate_reset_stipple_counter( struct draw_stage *stage )
{
struct draw_stage *pipeline = validate_pipeline( stage );
pipeline->reset_stipple_counter( pipeline );
}
static void validate_flush( struct draw_stage *stage,
unsigned flags )
{
/* May need to pass a backend flush on to the rasterize stage.
*/
if (stage->next)
stage->next->flush( stage->next, flags );
}
static void validate_destroy( struct draw_stage *stage )
{
FREE( stage );
}
/**
* Create validate pipeline stage.
*/
struct draw_stage *draw_validate_stage( struct draw_context *draw )
{
struct draw_stage *stage = CALLOC_STRUCT(draw_stage);
stage->draw = draw;
stage->next = NULL;
stage->point = validate_point;
stage->line = validate_line;
stage->tri = validate_tri;
stage->flush = validate_flush;
stage->reset_stipple_counter = validate_reset_stipple_counter;
stage->destroy = validate_destroy;
return stage;
}
|
