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
|
/**************************************************************************
*
* Copyright 2003 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.
*
**************************************************************************/
#include "pipe/p_util.h"
#include "pipe/p_shader_tokens.h"
#include "pipe/draw/draw_context.h"
#include "pipe/draw/draw_vertex.h"
#include "pipe/draw/draw_private.h"
#include "sp_context.h"
#include "sp_state.h"
static int
find_vs_output(const struct pipe_shader_state *vs,
uint semantic_name,
uint semantic_index)
{
uint i;
for (i = 0; i < vs->num_outputs; i++) {
if (vs->output_semantic_name[i] == semantic_name &&
vs->output_semantic_index[i] == semantic_index)
return i;
}
return -1;
}
/**
* Determine how to map vertex program outputs to fragment program inputs.
* Basically, this will be used when computing the triangle interpolation
* coefficients from the post-transform vertex attributes.
*/
static void calculate_vertex_layout( struct softpipe_context *softpipe )
{
const struct pipe_shader_state *vs = &softpipe->vs->shader;
const struct pipe_shader_state *fs = &softpipe->fs->shader;
const enum interp_mode colorInterp
= softpipe->rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
struct vertex_info *vinfo = &softpipe->vertex_info;
uint i;
if (softpipe->vbuf) {
/* if using the post-transform vertex buffer, tell draw_vbuf to
* simply emit the whole post-xform vertex as-is:
*/
struct vertex_info *vinfo_vbuf = &softpipe->vertex_info_vbuf;
vinfo_vbuf->num_attribs = 0;
draw_emit_vertex_attr(vinfo_vbuf, EMIT_ALL, INTERP_NONE, 0);
vinfo_vbuf->size = 4 * vs->num_outputs + sizeof(struct vertex_header)/4;
}
/*
* Loop over fragment shader inputs, searching for the matching output
* from the vertex shader.
*/
vinfo->num_attribs = 0;
for (i = 0; i < fs->num_inputs; i++) {
int src;
switch (fs->input_semantic_name[i]) {
case TGSI_SEMANTIC_POSITION:
src = find_vs_output(vs, TGSI_SEMANTIC_POSITION, 0);
assert(src >= 0);
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_POS, src);
break;
case TGSI_SEMANTIC_COLOR:
src = find_vs_output(vs, TGSI_SEMANTIC_COLOR,
fs->input_semantic_index[i]);
assert(src >= 0);
draw_emit_vertex_attr(vinfo, EMIT_4F, colorInterp, src);
break;
case TGSI_SEMANTIC_FOG:
src = find_vs_output(vs, TGSI_SEMANTIC_FOG, 0);
#if 1
if (src < 0) /* XXX temp hack, try demos/fogcoord.c with this */
src = 0;
#endif
assert(src >= 0);
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
break;
case TGSI_SEMANTIC_GENERIC:
/* this includes texcoords and varying vars */
src = find_vs_output(vs, TGSI_SEMANTIC_GENERIC,
fs->input_semantic_index[i]);
assert(src >= 0);
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
break;
default:
assert(0);
}
}
softpipe->psize_slot = find_vs_output(vs, TGSI_SEMANTIC_PSIZE, 0);
if (softpipe->psize_slot >= 0) {
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT,
softpipe->psize_slot);
}
draw_compute_vertex_size(vinfo);
}
/**
* Recompute cliprect from scissor bounds, scissor enable and surface size.
*/
static void
compute_cliprect(struct softpipe_context *sp)
{
unsigned surfWidth, surfHeight;
if (sp->framebuffer.num_cbufs > 0) {
surfWidth = sp->framebuffer.cbufs[0]->width;
surfHeight = sp->framebuffer.cbufs[0]->height;
}
else {
/* no surface? */
surfWidth = sp->scissor.maxx;
surfHeight = sp->scissor.maxy;
}
if (sp->rasterizer->scissor) {
/* clip to scissor rect */
sp->cliprect.minx = MAX2(sp->scissor.minx, 0);
sp->cliprect.miny = MAX2(sp->scissor.miny, 0);
sp->cliprect.maxx = MIN2(sp->scissor.maxx, surfWidth);
sp->cliprect.maxy = MIN2(sp->scissor.maxy, surfHeight);
}
else {
/* clip to surface bounds */
sp->cliprect.minx = 0;
sp->cliprect.miny = 0;
sp->cliprect.maxx = surfWidth;
sp->cliprect.maxy = surfHeight;
}
}
/* Hopefully this will remain quite simple, otherwise need to pull in
* something like the state tracker mechanism.
*/
void softpipe_update_derived( struct softpipe_context *softpipe )
{
if (softpipe->dirty & (SP_NEW_RASTERIZER |
SP_NEW_FS |
SP_NEW_VS))
calculate_vertex_layout( softpipe );
if (softpipe->dirty & (SP_NEW_SCISSOR |
SP_NEW_DEPTH_STENCIL_ALPHA |
SP_NEW_FRAMEBUFFER))
compute_cliprect(softpipe);
if (softpipe->dirty & (SP_NEW_BLEND |
SP_NEW_DEPTH_STENCIL_ALPHA |
SP_NEW_FRAMEBUFFER |
SP_NEW_RASTERIZER |
SP_NEW_FS |
SP_NEW_QUERY))
sp_build_quad_pipeline(softpipe);
softpipe->dirty = 0;
}
|
