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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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13
hlsl/hlslParseHelper.cpp
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@ -8695,12 +8695,25 @@ void HlslParseContext::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);
// "if applied to an aggregate containing a half float or 16-bit integer, the offset must also be a multiple of 2"
else if (contains16BitType)
RoundToPow2(nextOffset, 2);
#endif
memberQualifier.layoutXfbOffset = nextOffset;
} else
nextOffset = memberQualifier.layoutXfbOffset;