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
|
/**************************************************************************
*
* 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.
*
**************************************************************************/
/**
* \brief Apply AA coverage to quad alpha valus
* \author Brian Paul
*/
#include "pipe/p_defines.h"
#include "util/u_memory.h"
#include "lp_context.h"
#include "lp_quad.h"
#include "lp_quad_pipe.h"
/**
* Multiply quad's alpha values by the fragment coverage.
*/
static void
coverage_quad(struct quad_stage *qs, struct quad_header *quad)
{
struct llvmpipe_context *llvmpipe = qs->llvmpipe;
const uint prim = quad->input.prim;
if ((llvmpipe->rasterizer->poly_smooth && prim == QUAD_PRIM_TRI) ||
(llvmpipe->rasterizer->line_smooth && prim == QUAD_PRIM_LINE) ||
(llvmpipe->rasterizer->point_smooth && prim == QUAD_PRIM_POINT)) {
uint cbuf;
/* loop over colorbuffer outputs */
for (cbuf = 0; cbuf < llvmpipe->framebuffer.nr_cbufs; cbuf++) {
float (*quadColor)[4] = quad->output.color[cbuf];
unsigned j;
for (j = 0; j < QUAD_SIZE; j++) {
assert(quad->input.coverage[j] >= 0.0);
assert(quad->input.coverage[j] <= 1.0);
quadColor[3][j] *= quad->input.coverage[j];
}
}
}
qs->next->run(qs->next, quad);
}
static void coverage_begin(struct quad_stage *qs)
{
qs->next->begin(qs->next);
}
static void coverage_destroy(struct quad_stage *qs)
{
FREE( qs );
}
struct quad_stage *lp_quad_coverage_stage( struct llvmpipe_context *llvmpipe )
{
struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
stage->llvmpipe = llvmpipe;
stage->begin = coverage_begin;
stage->run = coverage_quad;
stage->destroy = coverage_destroy;
return stage;
}
|
