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
|
/**************************************************************************
*
* Copyright 2010 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 THE AUTHORS 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.
*
**************************************************************************/
/**
* Transform feedback functions.
*
* \author Brian Paul
* Marek Olšák
*/
#include "main/bufferobj.h"
#include "main/context.h"
#include "main/transformfeedback.h"
#include "st_cb_bufferobjects.h"
#include "st_cb_xformfb.h"
#include "st_context.h"
#include "pipe/p_context.h"
#include "util/u_draw.h"
#include "util/u_inlines.h"
#include "cso_cache/cso_context.h"
struct st_transform_feedback_object {
struct gl_transform_feedback_object base;
unsigned num_targets;
struct pipe_stream_output_target *targets[PIPE_MAX_SO_BUFFERS];
/* This encapsulates the count that can be used as a source for draw_vbo.
* It contains a stream output target from the last call of
* EndTransformFeedback. */
struct pipe_stream_output_target *draw_count;
};
static INLINE struct st_transform_feedback_object *
st_transform_feedback_object(struct gl_transform_feedback_object *obj)
{
return (struct st_transform_feedback_object *) obj;
}
static struct gl_transform_feedback_object *
st_new_transform_feedback(struct gl_context *ctx, GLuint name)
{
struct st_transform_feedback_object *obj;
obj = CALLOC_STRUCT(st_transform_feedback_object);
if (!obj)
return NULL;
obj->base.Name = name;
obj->base.RefCount = 1;
return &obj->base;
}
static void
st_delete_transform_feedback(struct gl_context *ctx,
struct gl_transform_feedback_object *obj)
{
struct st_transform_feedback_object *sobj =
st_transform_feedback_object(obj);
unsigned i;
pipe_so_target_reference(&sobj->draw_count, NULL);
/* Unreference targets. */
for (i = 0; i < sobj->num_targets; i++) {
pipe_so_target_reference(&sobj->targets[i], NULL);
}
for (i = 0; i < Elements(sobj->base.Buffers); i++) {
_mesa_reference_buffer_object(ctx, &sobj->base.Buffers[i], NULL);
}
free(obj);
}
/* XXX Do we really need the mode? */
static void
st_begin_transform_feedback(struct gl_context *ctx, GLenum mode,
struct gl_transform_feedback_object *obj)
{
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct st_transform_feedback_object *sobj =
st_transform_feedback_object(obj);
unsigned i, max_num_targets;
max_num_targets = MIN2(Elements(sobj->base.Buffers),
Elements(sobj->targets));
/* Convert the transform feedback state into the gallium representation. */
for (i = 0; i < max_num_targets; i++) {
struct st_buffer_object *bo = st_buffer_object(sobj->base.Buffers[i]);
if (bo) {
/* Check whether we need to recreate the target. */
if (!sobj->targets[i] ||
sobj->targets[i] == sobj->draw_count ||
sobj->targets[i]->buffer != bo->buffer ||
sobj->targets[i]->buffer_offset != sobj->base.Offset[i] ||
sobj->targets[i]->buffer_size != sobj->base.Size[i]) {
/* Create a new target. */
struct pipe_stream_output_target *so_target =
pipe->create_stream_output_target(pipe, bo->buffer,
sobj->base.Offset[i],
sobj->base.Size[i]);
pipe_so_target_reference(&sobj->targets[i], NULL);
sobj->targets[i] = so_target;
}
sobj->num_targets = i+1;
} else {
pipe_so_target_reference(&sobj->targets[i], NULL);
}
}
/* Start writing at the beginning of each target. */
cso_set_stream_outputs(st->cso_context, sobj->num_targets, sobj->targets,
0);
}
static void
st_pause_transform_feedback(struct gl_context *ctx,
struct gl_transform_feedback_object *obj)
{
struct st_context *st = st_context(ctx);
cso_set_stream_outputs(st->cso_context, 0, NULL, 0);
}
static void
st_resume_transform_feedback(struct gl_context *ctx,
struct gl_transform_feedback_object *obj)
{
struct st_context *st = st_context(ctx);
struct st_transform_feedback_object *sobj =
st_transform_feedback_object(obj);
cso_set_stream_outputs(st->cso_context, sobj->num_targets, sobj->targets,
~0);
}
static struct pipe_stream_output_target *
st_transform_feedback_get_draw_target(struct gl_transform_feedback_object *obj)
{
struct st_transform_feedback_object *sobj =
st_transform_feedback_object(obj);
unsigned i;
for (i = 0; i < Elements(sobj->targets); i++) {
if (sobj->targets[i]) {
return sobj->targets[i];
}
}
assert(0);
return NULL;
}
static void
st_end_transform_feedback(struct gl_context *ctx,
struct gl_transform_feedback_object *obj)
{
struct st_context *st = st_context(ctx);
struct st_transform_feedback_object *sobj =
st_transform_feedback_object(obj);
cso_set_stream_outputs(st->cso_context, 0, NULL, 0);
pipe_so_target_reference(&sobj->draw_count,
st_transform_feedback_get_draw_target(obj));
}
void
st_transform_feedback_draw_init(struct gl_transform_feedback_object *obj,
struct pipe_draw_info *out)
{
struct st_transform_feedback_object *sobj =
st_transform_feedback_object(obj);
out->count_from_stream_output = sobj->draw_count;
}
void
st_init_xformfb_functions(struct dd_function_table *functions)
{
functions->NewTransformFeedback = st_new_transform_feedback;
functions->DeleteTransformFeedback = st_delete_transform_feedback;
functions->BeginTransformFeedback = st_begin_transform_feedback;
functions->EndTransformFeedback = st_end_transform_feedback;
functions->PauseTransformFeedback = st_pause_transform_feedback;
functions->ResumeTransformFeedback = st_resume_transform_feedback;
}
|
