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
|
//
// Copyright 2016 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// UseInterfaceBlockFields.cpp: insert statements to reference all members in InterfaceBlock list at
// the beginning of main. This is to work around a Mac driver that treats unused standard/shared
// uniform blocks as inactive.
#include "compiler/translator/UseInterfaceBlockFields.h"
#include "compiler/translator/IntermNode.h"
#include "compiler/translator/util.h"
namespace sh
{
namespace
{
class UseUniformBlockMembers : public TIntermTraverser
{
public:
UseUniformBlockMembers(const InterfaceBlockList &blocks)
: TIntermTraverser(true, false, false), mBlocks(blocks), mCodeInserted(false)
{
}
protected:
bool visitAggregate(Visit visit, TIntermAggregate *node) override { return !mCodeInserted; }
bool visitFunctionDefinition(Visit visit, TIntermFunctionDefinition *node) override;
private:
void insertUseCode(TIntermSequence *sequence);
void AddFieldUseStatements(const ShaderVariable &var, TIntermSequence *sequence);
const InterfaceBlockList &mBlocks;
bool mCodeInserted;
};
bool UseUniformBlockMembers::visitFunctionDefinition(Visit visit, TIntermFunctionDefinition *node)
{
ASSERT(visit == PreVisit);
if (node->getFunctionSymbolInfo()->isMain())
{
TIntermBlock *body = node->getBody();
ASSERT(body);
insertUseCode(body->getSequence());
mCodeInserted = true;
return false;
}
return !mCodeInserted;
}
void UseUniformBlockMembers::AddFieldUseStatements(const ShaderVariable &var,
TIntermSequence *sequence)
{
TString name = TString(var.name.c_str());
TType type = GetShaderVariableType(var);
if (var.isArray())
{
size_t pos = name.find_last_of('[');
if (pos != TString::npos)
{
name = name.substr(0, pos);
}
TType elementType = type;
elementType.clearArrayness();
TIntermSymbol *arraySymbol = new TIntermSymbol(0, name, type);
for (unsigned int i = 0; i < var.arraySize; ++i)
{
TIntermBinary *element =
new TIntermBinary(EOpIndexDirect, arraySymbol, TIntermTyped::CreateIndexNode(i));
sequence->insert(sequence->begin(), element);
}
}
else if (var.isStruct())
{
TIntermSymbol *structSymbol = new TIntermSymbol(0, name, type);
for (unsigned int i = 0; i < var.fields.size(); ++i)
{
TIntermBinary *element = new TIntermBinary(EOpIndexDirectStruct, structSymbol,
TIntermTyped::CreateIndexNode(i));
sequence->insert(sequence->begin(), element);
}
}
else
{
TIntermSymbol *symbol = new TIntermSymbol(0, name, type);
sequence->insert(sequence->begin(), symbol);
}
}
void UseUniformBlockMembers::insertUseCode(TIntermSequence *sequence)
{
for (const auto &block : mBlocks)
{
if (block.instanceName.empty())
{
for (const auto &var : block.fields)
{
AddFieldUseStatements(var, sequence);
}
}
else if (block.arraySize > 0)
{
TType type = GetInterfaceBlockType(block);
TString name = TString(block.instanceName.c_str());
TIntermSymbol *arraySymbol = new TIntermSymbol(0, name, type);
for (unsigned int i = 0; i < block.arraySize; ++i)
{
TIntermBinary *instanceSymbol = new TIntermBinary(EOpIndexDirect, arraySymbol,
TIntermTyped::CreateIndexNode(i));
for (unsigned int j = 0; j < block.fields.size(); ++j)
{
TIntermBinary *element =
new TIntermBinary(EOpIndexDirectInterfaceBlock, instanceSymbol,
TIntermTyped::CreateIndexNode(j));
sequence->insert(sequence->begin(), element);
}
}
}
else
{
TType type = GetInterfaceBlockType(block);
TString name = TString(block.instanceName.c_str());
TIntermSymbol *blockSymbol = new TIntermSymbol(0, name, type);
for (unsigned int i = 0; i < block.fields.size(); ++i)
{
TIntermBinary *element = new TIntermBinary(
EOpIndexDirectInterfaceBlock, blockSymbol, TIntermTyped::CreateIndexNode(i));
sequence->insert(sequence->begin(), element);
}
}
}
}
} // namespace anonymous
void UseInterfaceBlockFields(TIntermNode *root, const InterfaceBlockList &blocks)
{
UseUniformBlockMembers useUniformBlock(blocks);
root->traverse(&useUniformBlock);
}
} // namespace sh
|
