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
|
/*
* Copyright © 2011 Intel Corporation
*
* 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#ifndef INTEL_RESLVE_MAP_H
#define INTEL_RESLVE_MAP_H
#include <stdint.h>
#include "blorp/blorp.h"
#include "compiler/glsl/list.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Enum for keeping track of the fast clear state of a buffer associated with
* a miptree.
*
* Fast clear works by deferring the memory writes that would be used to clear
* the buffer, so that instead of performing them at the time of the clear
* operation, the hardware automatically performs them at the time that the
* buffer is later accessed for rendering. The MCS buffer keeps track of
* which regions of the buffer still have pending clear writes.
*
* This enum keeps track of the driver's knowledge of pending fast clears in
* the MCS buffer.
*
* MCS buffers only exist on Gen7+.
*/
enum intel_fast_clear_state
{
/**
* No deferred clears are pending for this miptree, and the contents of the
* color buffer are entirely correct. An MCS buffer may or may not exist
* for this miptree. If it does exist, it is entirely in the "no deferred
* clears pending" state. If it does not exist, it will be created the
* first time a fast color clear is executed.
*
* In this state, the color buffer can be used for purposes other than
* rendering without needing a render target resolve.
*
* Since there is no such thing as a "fast color clear resolve" for MSAA
* buffers, an MSAA buffer will never be in this state.
*/
INTEL_FAST_CLEAR_STATE_RESOLVED,
/**
* An MCS buffer exists for this miptree, and deferred clears are pending
* for some regions of the color buffer, as indicated by the MCS buffer.
* The contents of the color buffer are only correct for the regions where
* the MCS buffer doesn't indicate a deferred clear.
*
* If a single-sample buffer is in this state, a render target resolve must
* be performed before it can be used for purposes other than rendering.
*/
INTEL_FAST_CLEAR_STATE_UNRESOLVED,
/**
* An MCS buffer exists for this miptree, and deferred clears are pending
* for the entire color buffer, and the contents of the MCS buffer reflect
* this. The contents of the color buffer are undefined.
*
* If a single-sample buffer is in this state, a render target resolve must
* be performed before it can be used for purposes other than rendering.
*
* If the client attempts to clear a buffer which is already in this state,
* the clear can be safely skipped, since the buffer is already clear.
*/
INTEL_FAST_CLEAR_STATE_CLEAR,
};
/**
* \brief Map of miptree slices to needed resolves.
*
* The map is implemented as a linear doubly-linked list.
*
* In the intel_resolve_map*() functions, the \c head argument is not
* inspected for its data. It only serves as an anchor for the list.
*
* \par Design Discussion
*
* There are two possible ways to record which miptree slices need
* resolves. 1) Maintain a flag for every miptree slice in the texture,
* likely in intel_mipmap_level::slice, or 2) maintain a list of only
* those slices that need a resolve.
*
* Immediately before drawing, a full depth resolve performed on each
* enabled depth texture. If design 1 were chosen, then at each draw call
* it would be necessary to iterate over each miptree slice of each
* enabled depth texture in order to query if each slice needed a resolve.
* In the worst case, this would require 2^16 iterations: 16 texture
* units, 16 miplevels, and 256 depth layers (assuming maximums for OpenGL
* 2.1).
*
* By choosing design 2, the number of iterations is exactly the minimum
* necessary.
*/
struct intel_resolve_map {
struct exec_node link;
uint32_t level;
uint32_t layer;
union {
enum blorp_hiz_op need;
enum intel_fast_clear_state fast_clear_state;
};
};
void
intel_resolve_map_set(struct exec_list *resolve_map,
uint32_t level,
uint32_t layer,
unsigned new_state);
const struct intel_resolve_map *
intel_resolve_map_find_any(const struct exec_list *resolve_map,
uint32_t start_level, uint32_t num_levels,
uint32_t start_layer, uint32_t num_layers);
static inline const struct intel_resolve_map *
intel_resolve_map_const_get(const struct exec_list *resolve_map,
uint32_t level,
uint32_t layer)
{
return intel_resolve_map_find_any(resolve_map, level, 1, layer, 1);
}
static inline struct intel_resolve_map *
intel_resolve_map_get(struct exec_list *resolve_map,
uint32_t level,
uint32_t layer)
{
return (struct intel_resolve_map *)intel_resolve_map_find_any(
resolve_map, level, 1, layer, 1);
}
void
intel_resolve_map_remove(struct intel_resolve_map *resolve_map);
void
intel_resolve_map_clear(struct exec_list *resolve_map);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* INTEL_RESLVE_MAP_H */
|
