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Reflection: Implement the std140 block offset calculation rules.

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git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24027 e7fa87d3-cd2b-0410-9028-fcbf551c1848
This commit is contained in:
John Kessenich 2013-11-13 05:40:44 +00:00
parent c043498b02
commit 568bc3ae55
5 changed files with 228 additions and 37 deletions
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48
Test/baseResults/reflection.vert.out
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@ -8,26 +8,54 @@ Linked vertex stage:
Uniform reflection:
0:anonMember3: offset 32, type 35666, arraySize 1, index 0
1:s.a: offset -1, type 35666, arraySize 1, index -1
2:anonMember1: offset 0, type 35666, arraySize 1, index 0
3:uf1: offset -1, type 35666, arraySize 1, index -1
4:uf2: offset -1, type 35666, arraySize 1, index -1
5:ablock.member3: offset 32, type 35666, arraySize 1, index 1
0: anonMember3: offset 80, type 35666, arraySize 1, index 0
1: s.a: offset -1, type 35666, arraySize 1, index -1
2: ablock.scalar: offset 12, type 35666, arraySize 1, index 1
3: m23: offset 16, type 35666, arraySize 1, index 0
4: scalarAfterm23: offset 48, type 35666, arraySize 1, index 0
5: c_m23: offset 16, type 35666, arraySize 1, index 2
6: c_scalarAfterm23: offset 64, type 35666, arraySize 1, index 2
7: scalarBeforeArray: offset 96, type 35666, arraySize 1, index 0
8: floatArray: offset 112, type 35666, arraySize 5, index 0
9: scalarAfterArray: offset 192, type 35666, arraySize 1, index 0
10: ablock.memvec2: offset 48, type 35666, arraySize 1, index 1
11: ablock.memf1: offset 56, type 35666, arraySize 1, index 1
12: ablock.memf2: offset 60, type 35666, arraySize 1, index 1
13: ablock.memf3: offset 64, type 35666, arraySize 1, index 1
14: ablock.memvec2a: offset 72, type 35666, arraySize 1, index 1
15: anonMember1: offset 0, type 35666, arraySize 1, index 0
16: uf1: offset -1, type 35666, arraySize 1, index -1
17: uf2: offset -1, type 35666, arraySize 1, index -1
18: ablock.member3: offset 32, type 35666, arraySize 1, index 1
Uniform block reflection:
0: nameless: offset -1, type -1, arraySize 1, index -1
1: ablock: offset -1, type -1, arraySize 1, index -1
2: c_nameless: offset -1, type -1, arraySize 1, index -1
Live names
ablock: 1
ablock.member3: 5
anonMember1: 2
ablock.member3: 18
ablock.memf1: 11
ablock.memf2: 12
ablock.memf3: 13
ablock.memvec2: 10
ablock.memvec2a: 14
ablock.scalar: 2
anonMember1: 15
anonMember3: 0
c_m23: 5
c_nameless: 2
c_scalarAfterm23: 6
floatArray: 8
liveFunction1(: -1
liveFunction2(: -1
m23: 3
nameless: 0
s.a: 1
uf1: 3
uf2: 4
scalarAfterArray: 9
scalarAfterm23: 4
scalarBeforeArray: 7
uf1: 16
uf2: 17

38
Test/reflection.vert
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@ -1,22 +1,41 @@
#version 440 core
uniform nameless {
layout(std140, row_major) uniform nameless {
vec3 anonMember1;
mat3x2 m23;
int scalarAfterm23;
vec4 anonDeadMember2;
vec4 anonMember3;
int scalarBeforeArray;
float floatArray[5];
int scalarAfterArray;
};
uniform named {
layout(std140, column_major) uniform c_nameless {
vec3 c_anonMember1;
mat3x2 c_m23;
int c_scalarAfterm23;
vec4 c_anonDeadMember2;
vec4 c_anonMember3;
};
layout(std140) uniform named {
vec3 deadMember1;
int scalar;
vec4 member2;
vec4 member3;
vec2 memvec2;
float memf1;
bool memf2;
int memf3;
vec2 memvec2a;
} ablock;
uniform namelessdead {
layout(std140) uniform namelessdead {
int a;
};
uniform namedDead {
layout(std140) uniform namedDead {
int b;
} bblock;
@ -68,6 +87,17 @@ void main()
liveFunction2();
f = anonMember3.z;
f = s.a;
f = ablock.scalar;
f = m23[1].y + scalarAfterm23;
f = c_m23[1].y + c_scalarAfterm23;
f += scalarBeforeArray;
f += floatArray[2];
f += scalarAfterArray;
f += ablock.memvec2.x;
f += ablock.memf1;
f += float(ablock.memf2);
f += ablock.memf3;
f += ablock.memvec2a.y;
} else
f = ufDead3;
}

23
glslang/Include/Types.h
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@ -490,6 +490,8 @@ typedef std::map<TTypeList*, TTypeList*>::const_iterator TStructureMapIterator;
class TType {
public:
POOL_ALLOCATOR_NEW_DELETE(GetThreadPoolAllocator())
// for "empty" type (no args) or simple scalar/vector/matrix
explicit TType(TBasicType t = EbtVoid, TStorageQualifier q = EvqTemporary, int vs = 1, int mc = 0, int mr = 0) :
basicType(t), vectorSize(vs), matrixCols(mc), matrixRows(mr), arraySizes(0),
structure(0), structureSize(0), fieldName(0), typeName(0)
@ -498,6 +500,7 @@ public:
qualifier.clear();
qualifier.storage = q;
}
// for explicit precision qualifier
TType(TBasicType t, TStorageQualifier q, TPrecisionQualifier p, int vs = 1, int mc = 0, int mr = 0) :
basicType(t), vectorSize(vs), matrixCols(mc), matrixRows(mr), arraySizes(0),
structure(0), structureSize(0), fieldName(0), typeName(0)
@ -508,7 +511,8 @@ public:
qualifier.precision = p;
assert(p >= 0 && p <= EpqHigh);
}
explicit TType(const TPublicType &p) :
// for turning a TPublicType into a TType
explicit TType(const TPublicType& p) :
basicType(p.basicType), vectorSize(p.vectorSize), matrixCols(p.matrixCols), matrixRows(p.matrixRows), arraySizes(p.arraySizes),
structure(0), structureSize(0), fieldName(0), typeName(0)
{
@ -522,6 +526,23 @@ public:
typeName = NewPoolTString(p.userDef->getTypeName().c_str());
}
}
// to efficiently make a dereferenced type
// without ever duplicating the outer structure that will be thrown away
// and using only shallow copy
TType(const TType& type, int derefIndex)
{
if (! type.isArray() && (type.basicType == EbtStruct || type.basicType == EbtBlock)) {
// do a structure dereference
const TTypeList& memberList = *type.getStruct();
shallowCopy(*memberList[derefIndex].type);
return;
} else {
// do an array/vector/matrix dereference
shallowCopy(type);
dereference();
}
}
// for making structures, ...
TType(TTypeList* userDef, const TString& n) :
basicType(EbtStruct), vectorSize(1), matrixCols(0), matrixRows(0),
arraySizes(0), structure(userDef), fieldName(0)

27
glslang/MachineIndependent/ParseHelper.cpp
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@ -500,13 +500,11 @@ TIntermTyped* TParseContext::handleBracketDereference(TSourceLoc loc, TIntermTyp
result = intermediate.addConstantUnion(unionArray, TType(EbtFloat, EvqConst), loc);
} else {
// Insert valid dereferenced result
TType newType;
newType.shallowCopy(base->getType());
TType newType(base->getType(), 0); // dereferenced type
if (base->getType().getQualifier().storage == EvqConst && index->getQualifier().storage == EvqConst)
newType.getQualifier().storage = EvqConst;
else
newType.getQualifier().storage = EvqTemporary;
newType.dereference();
result->setType(newType);
if (anyIndexLimits)
@ -3024,9 +3022,7 @@ TIntermTyped* TParseContext::convertInitializerList(TSourceLoc loc, const TType&
arrayType.shallowCopy(type);
arrayType.setArraySizes(type);
arrayType.changeArraySize(initList->getSequence().size());
TType elementType;
elementType.shallowCopy(arrayType); // TODO: 4.3 simplification: arrays of arrays: combine this with deref.
elementType.dereference();
TType elementType(arrayType, 0); // dereferenced type
for (size_t i = 0; i < initList->getSequence().size(); ++i) {
initList->getSequence()[i] = convertInitializerList(loc, elementType, initList->getSequence()[i]->getAsTyped());
if (initList->getSequence()[i] == 0)
@ -3049,9 +3045,7 @@ TIntermTyped* TParseContext::convertInitializerList(TSourceLoc loc, const TType&
error(loc, "wrong number of matrix columns:", "initializer list", type.getCompleteString().c_str());
return 0;
}
TType vectorType;
vectorType.shallowCopy(type); // TODO: 4.3 simplification: arrays of arrays: combine this with deref.
vectorType.dereference();
TType vectorType(type, 0); // dereferenced type
for (int i = 0; i < type.getMatrixCols(); ++i) {
initList->getSequence()[i] = convertInitializerList(loc, vectorType, initList->getSequence()[i]->getAsTyped());
if (initList->getSequence()[i] == 0)
@ -3088,10 +3082,11 @@ TIntermTyped* TParseContext::addConstructor(TSourceLoc loc, TIntermNode* node, c
if (op == EOpConstructStruct)
memberTypes = type.getStruct()->begin();
TType elementType;
elementType.shallowCopy(type);
const TType* elementType;
if (type.isArray())
elementType.dereference(); // TODO: 4.3 simplification: arrays of arrays: combine this with deref.
elementType = &TType(type, 0); // dereferenced type
else
elementType = &type;
bool singleArg;
if (aggrNode) {
@ -3107,7 +3102,7 @@ TIntermTyped* TParseContext::addConstructor(TSourceLoc loc, TIntermNode* node, c
// If structure constructor or array constructor is being called
// for only one parameter inside the structure, we need to call constructStruct function once.
if (type.isArray())
newNode = constructStruct(node, elementType, 1, node->getLoc());
newNode = constructStruct(node, *elementType, 1, node->getLoc());
else if (op == EOpConstructStruct)
newNode = constructStruct(node, *(*memberTypes).type, 1, node->getLoc());
else
@ -3135,7 +3130,7 @@ TIntermTyped* TParseContext::addConstructor(TSourceLoc loc, TIntermNode* node, c
for (TIntermSequence::iterator p = sequenceVector.begin();
p != sequenceVector.end(); p++, paramCount++) {
if (type.isArray())
newNode = constructStruct(*p, elementType, paramCount+1, node->getLoc());
newNode = constructStruct(*p, *elementType, paramCount+1, node->getLoc());
else if (op == EOpConstructStruct)
newNode = constructStruct(*p, *(memberTypes[paramCount]).type, paramCount+1, node->getLoc());
else
@ -3724,9 +3719,7 @@ TIntermTyped* TParseContext::addConstMatrixNode(TSourceLoc loc, int index, TInte
//
TIntermTyped* TParseContext::addConstArrayNode(TSourceLoc loc, int index, TIntermTyped* node)
{
TType arrayElementType;
arrayElementType.shallowCopy(node->getType()); // TODO: 4.3 simplification: arrays of arrays: combine this with deref.
arrayElementType.dereference();
TType arrayElementType(node->getType(), 0); // dereferenced type
if (index >= node->getType().getArraySize() || index < 0) {
error(loc, "", "[", "array index '%d' out of range", index);

129
glslang/MachineIndependent/reflection.cpp
View File

@ -65,7 +65,7 @@ namespace glslang {
//
// The traverser: mostly pass through, except
// - processing function-call nodes to push live functions onto the stack of functions to process
// - processing binary nodes to see if they are dereferences of aggregates to track
// - processing binary nodes to see if they are dereferences of an aggregates to track
// - processing symbol nodes to see if they are non-aggregate objects to track
// - processing selection nodes to trim semantically dead code
//
@ -87,7 +87,7 @@ public:
}
}
// Add a simple uniform variable reference to the uniform database, no derefence involved.
// Add a simple uniform variable reference to the uniform database, no dereference involved.
void addUniform(const TIntermSymbol& symbol)
{
if (reflection.nameToIndex.find(symbol.getName()) == reflection.nameToIndex.end()) {
@ -98,7 +98,126 @@ public:
}
}
// Add a complex uniform reference where blocks/struct/arrays are involved in tha access.
static const int baseAlignmentVec4Std140 = 16;
// align a value: if 'value' is not aligned to 'alignment', move it up to a multiple of alignment
void align(int& value, int alignment)
{
int error = value % alignment;
if (error)
value += alignment - error;
}
// return the size and alignment of a scalar
int getBaseAlignmentScalar(const TType& type, int& size)
{
switch (type.getBasicType()) {
case EbtDouble: size = 8; return 8;
default: size = 4; return 4;
}
}
// Implement base-alignment and size rules from section 7.6.2.2 Standard Uniform Block Layout
// Operates recursively.
// If std140 is true, it does the rounding up to vec4 size required by std140,
// otherwise it does not, yielding std430 rules.
//
// Returns the size of the type.
int getBaseAlignment(const TType& type, int& size, bool std140)
{
int alignment;
// rules 4, 6, and 8
if (type.isArray()) {
TType derefType(type, 0);
alignment = getBaseAlignment(derefType, size, std140);
if (std140)
alignment = std::max(baseAlignmentVec4Std140, alignment);
align(size, alignment);
size *= type.getArraySize();
return alignment;
}
// rule 9
if (type.getBasicType() == EbtStruct) {
const TTypeList& memberList = *type.getStruct();
int size = 0;
int maxAlignment = std140 ? baseAlignmentVec4Std140 : 0;
for (size_t m = 0; m < memberList.size(); ++m) {
int memberSize;
int memberAlignment = getBaseAlignment(*memberList[m].type, memberSize, std140);
maxAlignment = std::max(maxAlignment, memberAlignment);
align(size, memberAlignment);
size += memberSize;
}
return maxAlignment;
}
// rule 1
if (type.isScalar())
return getBaseAlignmentScalar(type, size);
// rules 2 and 3
if (type.isVector()) {
int scalarAlign = getBaseAlignmentScalar(type, size);
switch (type.getVectorSize()) {
case 2:
size *= 2;
return 2 * scalarAlign;
default:
size *= type.getVectorSize();
return 4 * scalarAlign;
}
}
// rules 5 and 7
if (type.isMatrix()) {
TType derefType(type, 0);
// rule 5: deref to row, not to column, meaning the size of vector is num columns instead of num rows
if (type.getQualifier().layoutMatrix == ElmRowMajor)
derefType.setElementType(derefType.getBasicType(), type.getMatrixCols(), 0, 0, 0);
alignment = getBaseAlignment(derefType, size, std140);
if (std140)
alignment = std::max(baseAlignmentVec4Std140, alignment);
align(size, alignment);
if (type.getQualifier().layoutMatrix == ElmRowMajor)
size *= type.getMatrixRows();
else
size *= type.getMatrixCols();
return alignment;
}
assert(0); // all cases should be covered above
size = baseAlignmentVec4Std140;
return baseAlignmentVec4Std140;
}
// Calculate the offset of a block member, using the recursively defined
// block offset rules.
int getBlockMemberOffset(const TType& blockType, int index)
{
// TODO: reflection performance: cache these results instead of recomputing them
int offset = 0;
const TTypeList& memberList = *blockType.getStruct();
int memberSize;
for (int m = 0; m < index; ++m) {
int memberAlignment = getBaseAlignment(*memberList[m].type, memberSize, blockType.getQualifier().layoutPacking == ElpStd140);
align(offset, memberAlignment);
offset += memberSize;
}
int memberAlignment = getBaseAlignment(*memberList[index].type, memberSize, blockType.getQualifier().layoutPacking == ElpStd140);
align(offset, memberAlignment);
return offset;
}
// Add a complex uniform reference where blocks/struct/arrays are involved in the access.
void addDereferencedUniform(TIntermSymbol* base, TIntermBinary* node)
{
bool block = base->getBasicType() == EbtBlock;
@ -133,7 +252,7 @@ public:
}
int structIndex = node->getRight()->getAsConstantUnion()->getConstArray()[0].getIConst();
if (block)
offset = structIndex * 16; // TODO: reflection: compute std140 offsets
offset = getBlockMemberOffset(base->getType(), structIndex);
name.append((*base->getType().getStruct())[structIndex].type->getFieldName().c_str());
break;
}
@ -312,7 +431,7 @@ void TReflection::dump()
{
printf("Uniform reflection:\n");
for (size_t i = 0; i < indexToUniform.size(); ++i) {
printf("%d:", (int)i);
printf("%d: ", (int)i);
indexToUniform[i].dump();
}
printf("\n");