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//
// Copyright (c) 2002-2010 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/VariableInfo.h"
static TString arrayBrackets(int index)
{
TStringStream stream;
stream << "[" << index << "]";
return stream.str();
}
// Returns the data type for an attribute or uniform.
static ShDataType getVariableDataType(const TType& type)
{
switch (type.getBasicType()) {
case EbtFloat:
if (type.isMatrix()) {
switch (type.getNominalSize()) {
case 2: return SH_FLOAT_MAT2;
case 3: return SH_FLOAT_MAT3;
case 4: return SH_FLOAT_MAT4;
default: UNREACHABLE();
}
} else if (type.isVector()) {
switch (type.getNominalSize()) {
case 2: return SH_FLOAT_VEC2;
case 3: return SH_FLOAT_VEC3;
case 4: return SH_FLOAT_VEC4;
default: UNREACHABLE();
}
} else {
return SH_FLOAT;
}
case EbtInt:
if (type.isMatrix()) {
UNREACHABLE();
} else if (type.isVector()) {
switch (type.getNominalSize()) {
case 2: return SH_INT_VEC2;
case 3: return SH_INT_VEC3;
case 4: return SH_INT_VEC4;
default: UNREACHABLE();
}
} else {
return SH_INT;
}
case EbtBool:
if (type.isMatrix()) {
UNREACHABLE();
} else if (type.isVector()) {
switch (type.getNominalSize()) {
case 2: return SH_BOOL_VEC2;
case 3: return SH_BOOL_VEC3;
case 4: return SH_BOOL_VEC4;
default: UNREACHABLE();
}
} else {
return SH_BOOL;
}
case EbtSampler2D: return SH_SAMPLER_2D;
case EbtSamplerCube: return SH_SAMPLER_CUBE;
case EbtSamplerExternalOES: return SH_SAMPLER_EXTERNAL_OES;
case EbtSampler2DRect: return SH_SAMPLER_2D_RECT_ARB;
default: UNREACHABLE();
}
return SH_NONE;
}
static void getBuiltInVariableInfo(const TType& type,
const TString& name,
const TString& mappedName,
TVariableInfoList& infoList);
static void getUserDefinedVariableInfo(const TType& type,
const TString& name,
const TString& mappedName,
TVariableInfoList& infoList);
// Returns info for an attribute or uniform.
static void getVariableInfo(const TType& type,
const TString& name,
const TString& mappedName,
TVariableInfoList& infoList)
{
if (type.getBasicType() == EbtStruct) {
if (type.isArray()) {
for (int i = 0; i < type.getArraySize(); ++i) {
TString lname = name + arrayBrackets(i);
TString lmappedName = mappedName + arrayBrackets(i);
getUserDefinedVariableInfo(type, lname, lmappedName, infoList);
}
} else {
getUserDefinedVariableInfo(type, name, mappedName, infoList);
}
} else {
getBuiltInVariableInfo(type, name, mappedName, infoList);
}
}
void getBuiltInVariableInfo(const TType& type,
const TString& name,
const TString& mappedName,
TVariableInfoList& infoList)
{
ASSERT(type.getBasicType() != EbtStruct);
TVariableInfo varInfo;
if (type.isArray()) {
varInfo.name = (name + "[0]").c_str();
varInfo.mappedName = (mappedName + "[0]").c_str();
varInfo.size = type.getArraySize();
} else {
varInfo.name = name.c_str();
varInfo.mappedName = mappedName.c_str();
varInfo.size = 1;
}
varInfo.type = getVariableDataType(type);
infoList.push_back(varInfo);
}
void getUserDefinedVariableInfo(const TType& type,
const TString& name,
const TString& mappedName,
TVariableInfoList& infoList)
{
ASSERT(type.getBasicType() == EbtStruct);
const TTypeList* structure = type.getStruct();
for (size_t i = 0; i < structure->size(); ++i) {
const TType* fieldType = (*structure)[i].type;
getVariableInfo(*fieldType,
name + "." + fieldType->getFieldName(),
mappedName + "." + fieldType->getFieldName(),
infoList);
}
}
TVariableInfo::TVariableInfo()
{
}
TVariableInfo::TVariableInfo(ShDataType type, int size)
: type(type),
size(size)
{
}
CollectAttribsUniforms::CollectAttribsUniforms(TVariableInfoList& attribs,
TVariableInfoList& uniforms)
: mAttribs(attribs),
mUniforms(uniforms)
{
}
// We are only interested in attribute and uniform variable declaration.
void CollectAttribsUniforms::visitSymbol(TIntermSymbol*)
{
}
void CollectAttribsUniforms::visitConstantUnion(TIntermConstantUnion*)
{
}
bool CollectAttribsUniforms::visitBinary(Visit, TIntermBinary*)
{
return false;
}
bool CollectAttribsUniforms::visitUnary(Visit, TIntermUnary*)
{
return false;
}
bool CollectAttribsUniforms::visitSelection(Visit, TIntermSelection*)
{
return false;
}
bool CollectAttribsUniforms::visitAggregate(Visit, TIntermAggregate* node)
{
bool visitChildren = false;
switch (node->getOp())
{
case EOpSequence:
// We need to visit sequence children to get to variable declarations.
visitChildren = true;
break;
case EOpDeclaration: {
const TIntermSequence& sequence = node->getSequence();
TQualifier qualifier = sequence.front()->getAsTyped()->getQualifier();
if (qualifier == EvqAttribute || qualifier == EvqUniform)
{
TVariableInfoList& infoList = qualifier == EvqAttribute ?
mAttribs : mUniforms;
for (TIntermSequence::const_iterator i = sequence.begin();
i != sequence.end(); ++i)
{
const TIntermSymbol* variable = (*i)->getAsSymbolNode();
// The only case in which the sequence will not contain a
// TIntermSymbol node is initialization. It will contain a
// TInterBinary node in that case. Since attributes and unifroms
// cannot be initialized in a shader, we must have only
// TIntermSymbol nodes in the sequence.
ASSERT(variable != NULL);
getVariableInfo(variable->getType(),
variable->getOriginalSymbol(),
variable->getSymbol(),
infoList);
}
}
break;
}
default: break;
}
return visitChildren;
}
bool CollectAttribsUniforms::visitLoop(Visit, TIntermLoop*)
{
return false;
}
bool CollectAttribsUniforms::visitBranch(Visit, TIntermBranch*)
{
return false;
}
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