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
|
//
// Copyright (c) 2002-2013 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.
//
#include "compiler/translator/TranslatorHLSL.h"
#include "compiler/translator/AddDefaultReturnStatements.h"
#include "compiler/translator/ArrayReturnValueToOutParameter.h"
#include "compiler/translator/BreakVariableAliasingInInnerLoops.h"
#include "compiler/translator/EmulatePrecision.h"
#include "compiler/translator/ExpandIntegerPowExpressions.h"
#include "compiler/translator/IntermNodePatternMatcher.h"
#include "compiler/translator/OutputHLSL.h"
#include "compiler/translator/RemoveDynamicIndexing.h"
#include "compiler/translator/RewriteElseBlocks.h"
#include "compiler/translator/RewriteTexelFetchOffset.h"
#include "compiler/translator/RewriteUnaryMinusOperatorInt.h"
#include "compiler/translator/SeparateArrayInitialization.h"
#include "compiler/translator/SeparateDeclarations.h"
#include "compiler/translator/SeparateExpressionsReturningArrays.h"
#include "compiler/translator/SimplifyLoopConditions.h"
#include "compiler/translator/SplitSequenceOperator.h"
#include "compiler/translator/UnfoldShortCircuitToIf.h"
namespace sh
{
TranslatorHLSL::TranslatorHLSL(sh::GLenum type, ShShaderSpec spec, ShShaderOutput output)
: TCompiler(type, spec, output)
{
}
void TranslatorHLSL::translate(TIntermNode *root, ShCompileOptions compileOptions)
{
const ShBuiltInResources &resources = getResources();
int numRenderTargets = resources.EXT_draw_buffers ? resources.MaxDrawBuffers : 1;
sh::AddDefaultReturnStatements(root);
SeparateDeclarations(root);
// Note that SimplifyLoopConditions needs to be run before any other AST transformations that
// may need to generate new statements from loop conditions or loop expressions.
SimplifyLoopConditions(root,
IntermNodePatternMatcher::kExpressionReturningArray |
IntermNodePatternMatcher::kUnfoldedShortCircuitExpression |
IntermNodePatternMatcher::kDynamicIndexingOfVectorOrMatrixInLValue,
getTemporaryIndex(), getSymbolTable(), getShaderVersion());
SplitSequenceOperator(root,
IntermNodePatternMatcher::kExpressionReturningArray |
IntermNodePatternMatcher::kUnfoldedShortCircuitExpression |
IntermNodePatternMatcher::kDynamicIndexingOfVectorOrMatrixInLValue,
getTemporaryIndex(), getSymbolTable(), getShaderVersion());
// Note that SeparateDeclarations needs to be run before UnfoldShortCircuitToIf.
UnfoldShortCircuitToIf(root, getTemporaryIndex());
SeparateExpressionsReturningArrays(root, getTemporaryIndex());
// Note that SeparateDeclarations needs to be run before SeparateArrayInitialization.
SeparateArrayInitialization(root);
// HLSL doesn't support arrays as return values, we'll need to make functions that have an array
// as a return value to use an out parameter to transfer the array data instead.
ArrayReturnValueToOutParameter(root, getTemporaryIndex());
if (!shouldRunLoopAndIndexingValidation(compileOptions))
{
// HLSL doesn't support dynamic indexing of vectors and matrices.
RemoveDynamicIndexing(root, getTemporaryIndex(), getSymbolTable(), getShaderVersion());
}
// Work around D3D9 bug that would manifest in vertex shaders with selection blocks which
// use a vertex attribute as a condition, and some related computation in the else block.
if (getOutputType() == SH_HLSL_3_0_OUTPUT && getShaderType() == GL_VERTEX_SHADER)
{
sh::RewriteElseBlocks(root, getTemporaryIndex());
}
// Work around an HLSL compiler frontend aliasing optimization bug.
// TODO(cwallez) The date is 2016-08-25, Microsoft said the bug would be fixed
// in the next release of d3dcompiler.dll, it would be nice to detect the DLL
// version and only apply the workaround if it is too old.
sh::BreakVariableAliasingInInnerLoops(root);
bool precisionEmulation =
getResources().WEBGL_debug_shader_precision && getPragma().debugShaderPrecision;
if (precisionEmulation)
{
EmulatePrecision emulatePrecision(getSymbolTable(), getShaderVersion());
root->traverse(&emulatePrecision);
emulatePrecision.updateTree();
emulatePrecision.writeEmulationHelpers(getInfoSink().obj, getShaderVersion(),
getOutputType());
}
if ((compileOptions & SH_EXPAND_SELECT_HLSL_INTEGER_POW_EXPRESSIONS) != 0)
{
sh::ExpandIntegerPowExpressions(root, getTemporaryIndex());
}
if ((compileOptions & SH_REWRITE_TEXELFETCHOFFSET_TO_TEXELFETCH) != 0)
{
sh::RewriteTexelFetchOffset(root, getSymbolTable(), getShaderVersion());
}
if (((compileOptions & SH_REWRITE_INTEGER_UNARY_MINUS_OPERATOR) != 0) &&
getShaderType() == GL_VERTEX_SHADER)
{
sh::RewriteUnaryMinusOperatorInt(root);
}
sh::OutputHLSL outputHLSL(getShaderType(), getShaderVersion(), getExtensionBehavior(),
getSourcePath(), getOutputType(), numRenderTargets, getUniforms(), compileOptions);
outputHLSL.output(root, getInfoSink().obj);
mInterfaceBlockRegisterMap = outputHLSL.getInterfaceBlockRegisterMap();
mUniformRegisterMap = outputHLSL.getUniformRegisterMap();
}
bool TranslatorHLSL::shouldFlattenPragmaStdglInvariantAll()
{
// Not necessary when translating to HLSL.
return false;
}
bool TranslatorHLSL::hasInterfaceBlock(const std::string &interfaceBlockName) const
{
return (mInterfaceBlockRegisterMap.count(interfaceBlockName) > 0);
}
unsigned int TranslatorHLSL::getInterfaceBlockRegister(const std::string &interfaceBlockName) const
{
ASSERT(hasInterfaceBlock(interfaceBlockName));
return mInterfaceBlockRegisterMap.find(interfaceBlockName)->second;
}
const std::map<std::string, unsigned int> *TranslatorHLSL::getUniformRegisterMap() const
{
return &mUniformRegisterMap;
}
} // namespace sh
|
