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Add 8-bit/16-bit transform feedback support for future use

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This commit is contained in:
Rex Xu 2019-01-21 16:50:17 +08:00
parent dc2d5673a1
commit eaf31ab98c
8 changed files with 288 additions and 9 deletions
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33
glslang/MachineIndependent/ParseHelper.cpp
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@ -5463,14 +5463,23 @@ void TParseContext::layoutTypeCheck(const TSourceLoc& loc, const TType& type)
// "The offset must be a multiple of the size of the first component of the first
// qualified variable or block member, or a compile-time error results. Further, if applied to an aggregate
// containing a double, the offset must also be a multiple of 8..."
if (type.containsBasicType(EbtDouble) && ! IsMultipleOfPow2(qualifier.layoutXfbOffset, 8))
error(loc, "type contains double; xfb_offset must be a multiple of 8", "xfb_offset", "");
// ..., if applied to an aggregate containing a float16_t, the offset must also be a multiple of 2..."
else if (type.containsBasicType(EbtFloat16) && !IsMultipleOfPow2(qualifier.layoutXfbOffset, 2))
error(loc, "type contains half float; xfb_offset must be a multiple of 2", "xfb_offset", "");
// containing a double or 64-bit integer, the offset must also be a multiple of 8..."
if ((type.containsBasicType(EbtDouble) || type.containsBasicType(EbtInt64) || type.containsBasicType(EbtUint64)) &&
! IsMultipleOfPow2(qualifier.layoutXfbOffset, 8))
error(loc, "type contains double or 64-bit integer; xfb_offset must be a multiple of 8", "xfb_offset", "");
#ifdef AMD_EXTENSIONS
else if ((type.containsBasicType(EbtBool) || type.containsBasicType(EbtFloat) ||
type.containsBasicType(EbtInt) || type.containsBasicType(EbtUint)) &&
! IsMultipleOfPow2(qualifier.layoutXfbOffset, 4))
error(loc, "must be a multiple of size of first component", "xfb_offset", "");
// ..., if applied to an aggregate containing a half float or 16-bit integer, the offset must also be a multiple of 2..."
else if ((type.containsBasicType(EbtFloat16) || type.containsBasicType(EbtInt16) || type.containsBasicType(EbtUint16)) &&
!IsMultipleOfPow2(qualifier.layoutXfbOffset, 2))
error(loc, "type contains half float or 16-bit integer; xfb_offset must be a multiple of 2", "xfb_offset", "");
#else
else if (! IsMultipleOfPow2(qualifier.layoutXfbOffset, 4))
error(loc, "must be a multiple of size of first component", "xfb_offset", "");
#endif
}
if (qualifier.hasXfbStride() && qualifier.hasXfbBuffer()) {
@ -7287,12 +7296,24 @@ void TParseContext::fixXfbOffsets(TQualifier& qualifier, TTypeList& typeList)
for (unsigned int member = 0; member < typeList.size(); ++member) {
TQualifier& memberQualifier = typeList[member].type->getQualifier();
bool contains64BitType = false;
#ifdef AMD_EXTENSIONS
bool contains32BitType = false;
bool contains16BitType = false;
int memberSize = intermediate.computeTypeXfbSize(*typeList[member].type, contains64BitType, contains32BitType, contains16BitType);
#else
int memberSize = intermediate.computeTypeXfbSize(*typeList[member].type, contains64BitType);
#endif
// see if we need to auto-assign an offset to this member
if (! memberQualifier.hasXfbOffset()) {
// "if applied to an aggregate containing a double or 64-bit integer, the offset must also be a multiple of 8"
if (contains64BitType)
RoundToPow2(nextOffset, 8);
#ifdef AMD_EXTENSIONS
else if (contains32BitType)
RoundToPow2(nextOffset, 4);
else if (contains16BitType)
RoundToPow2(nextOffset, 2);
#endif
memberQualifier.layoutXfbOffset = nextOffset;
} else
nextOffset = memberQualifier.layoutXfbOffset;