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
|
/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "constant_fold.h"
#include "graph.h"
#include "util_foreach.h"
CCL_NAMESPACE_BEGIN
ConstantFolder::ConstantFolder(ShaderGraph *graph, ShaderNode *node, ShaderOutput *output)
: graph(graph), node(node), output(output)
{
}
bool ConstantFolder::all_inputs_constant() const
{
foreach(ShaderInput *input, node->inputs) {
if(input->link) {
return false;
}
}
return true;
}
void ConstantFolder::make_constant(float value) const
{
foreach(ShaderInput *sock, output->links) {
sock->set(value);
}
graph->disconnect(output);
}
void ConstantFolder::make_constant(float3 value) const
{
foreach(ShaderInput *sock, output->links) {
sock->set(value);
}
graph->disconnect(output);
}
void ConstantFolder::make_constant_clamp(float value, bool clamp) const
{
make_constant(clamp ? saturate(value) : value);
}
void ConstantFolder::make_constant_clamp(float3 value, bool clamp) const
{
if (clamp) {
value.x = saturate(value.x);
value.y = saturate(value.y);
value.z = saturate(value.z);
}
make_constant(value);
}
void ConstantFolder::bypass(ShaderOutput *new_output) const
{
assert(new_output);
/* Remove all outgoing links from socket and connect them to new_output instead.
* The graph->relink method affects node inputs, so it's not safe to use in constant
* folding if the node has multiple outputs and will thus be folded multiple times. */
vector<ShaderInput*> outputs = output->links;
graph->disconnect(output);
foreach(ShaderInput *sock, outputs) {
graph->connect(new_output, sock);
}
}
void ConstantFolder::discard() const
{
assert(output->type() == SocketType::CLOSURE);
graph->disconnect(output);
}
void ConstantFolder::bypass_or_discard(ShaderInput *input) const
{
assert(input->type() == SocketType::CLOSURE);
if (input->link) {
bypass(input->link);
}
else {
discard();
}
}
bool ConstantFolder::try_bypass_or_make_constant(ShaderInput *input, float3 input_value, bool clamp) const
{
if(!input->link) {
make_constant_clamp(input_value, clamp);
return true;
}
else if(!clamp) {
bypass(input->link);
return true;
}
return false;
}
CCL_NAMESPACE_END
|
