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
|
/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
* Copyright 2008 VMware, Inc. 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.
*
**************************************************************************/
/* Vertices are just an array of floats, with all the attributes
* packed. We currently assume a layout like:
*
* attr[0][0..3] - window position
* attr[1..n][0..3] - remaining attributes.
*
* Attributes are assumed to be 4 floats wide but are packed so that
* all the enabled attributes run contiguously.
*/
#include "util/u_math.h"
#include "util/u_memory.h"
#include "pipe/p_defines.h"
#include "pipe/p_shader_tokens.h"
#include "lp_context.h"
#include "lp_state.h"
#include "lp_quad.h"
#include "lp_quad_pipe.h"
#include "lp_texture.h"
#include "lp_tex_sample.h"
struct quad_shade_stage
{
struct quad_stage stage; /**< base class */
struct tgsi_exec_machine *machine;
struct tgsi_exec_vector *inputs, *outputs;
};
/** cast wrapper */
static INLINE struct quad_shade_stage *
quad_shade_stage(struct quad_stage *qs)
{
return (struct quad_shade_stage *) qs;
}
/**
* Execute fragment shader for the four fragments in the quad.
*/
static boolean
shade_quad(struct quad_stage *qs, struct quad_header *quad)
{
struct quad_shade_stage *qss = quad_shade_stage( qs );
struct llvmpipe_context *llvmpipe = qs->llvmpipe;
struct tgsi_exec_machine *machine = qss->machine;
boolean z_written;
/* run shader */
quad->inout.mask &= llvmpipe->fs->run( llvmpipe->fs, machine, quad );
if (quad->inout.mask == 0)
return FALSE;
/* store outputs */
z_written = FALSE;
{
const ubyte *sem_name = llvmpipe->fs->info.output_semantic_name;
const ubyte *sem_index = llvmpipe->fs->info.output_semantic_index;
const uint n = qss->stage.llvmpipe->fs->info.num_outputs;
uint i;
for (i = 0; i < n; i++) {
switch (sem_name[i]) {
case TGSI_SEMANTIC_COLOR:
{
uint cbuf = sem_index[i];
memcpy(quad->output.color[cbuf],
&machine->Outputs[i].xyzw[0].f[0],
sizeof(quad->output.color[0]) );
}
break;
case TGSI_SEMANTIC_POSITION:
{
uint j;
for (j = 0; j < 4; j++) {
quad->output.depth[j] = machine->Outputs[0].xyzw[2].f[j];
}
z_written = TRUE;
}
break;
}
}
}
if (!z_written) {
/* compute Z values now, as in the quad earlyz stage */
/* XXX we should really only do this if the earlyz stage is not used */
const float fx = (float) quad->input.x0;
const float fy = (float) quad->input.y0;
const float dzdx = quad->posCoef->dadx[2];
const float dzdy = quad->posCoef->dady[2];
const float z0 = quad->posCoef->a0[2] + dzdx * fx + dzdy * fy;
quad->output.depth[0] = z0;
quad->output.depth[1] = z0 + dzdx;
quad->output.depth[2] = z0 + dzdy;
quad->output.depth[3] = z0 + dzdx + dzdy;
}
return TRUE;
}
static void
shade_quads(struct quad_stage *qs,
struct quad_header *quads[],
unsigned nr)
{
struct quad_shade_stage *qss = quad_shade_stage( qs );
struct llvmpipe_context *llvmpipe = qs->llvmpipe;
struct tgsi_exec_machine *machine = qss->machine;
unsigned i, pass = 0;
machine->Consts = llvmpipe->mapped_constants[PIPE_SHADER_FRAGMENT];
machine->InterpCoefs = quads[0]->coef;
for (i = 0; i < nr; i++) {
if (shade_quad(qs, quads[i]))
quads[pass++] = quads[i];
}
if (pass)
qs->next->run(qs->next, quads, pass);
}
/**
* Per-primitive (or per-begin?) setup
*/
static void
shade_begin(struct quad_stage *qs)
{
struct quad_shade_stage *qss = quad_shade_stage(qs);
struct llvmpipe_context *llvmpipe = qs->llvmpipe;
llvmpipe->fs->prepare( llvmpipe->fs,
qss->machine,
(struct tgsi_sampler **)
llvmpipe->tgsi.frag_samplers_list );
qs->next->begin(qs->next);
}
static void
shade_destroy(struct quad_stage *qs)
{
struct quad_shade_stage *qss = (struct quad_shade_stage *) qs;
tgsi_exec_machine_destroy(qss->machine);
FREE( qs );
}
struct quad_stage *
lp_quad_shade_stage( struct llvmpipe_context *llvmpipe )
{
struct quad_shade_stage *qss = CALLOC_STRUCT(quad_shade_stage);
if (!qss)
goto fail;
qss->stage.llvmpipe = llvmpipe;
qss->stage.begin = shade_begin;
qss->stage.run = shade_quads;
qss->stage.destroy = shade_destroy;
qss->machine = tgsi_exec_machine_create();
if (!qss->machine)
goto fail;
return &qss->stage;
fail:
if (qss && qss->machine)
tgsi_exec_machine_destroy(qss->machine);
FREE(qss);
return NULL;
}
|
