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KhronosGroup / KTX-Specification Public

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Add UASTC HDR and XUASTC LDR formats#216

Open

MarkCallow wants to merge 50 commits into

mainKhronosGroup/KTX-Specification:mainfrom

uastc_hdrKhronosGroup/KTX-Specification:uastc_hdrCopy head branch name to clipboard

Conversation Commits50 (50)Checks Files changed

Open

Add UASTC HDR and XUASTC LDR formats#216
MarkCallow wants to merge 50 commits into
mainfrom
uastc_hdr

Commits

Commits on Jul 9, 2026

Add UASTC HDR.
MarkCallow
committed
Address review comments.
MarkCallow
committed
Remove excess spaces.
MarkCallow
committed
Clarify that GPUs must support ASTC HDR to use UASTC HDR directly.
MarkCallow
committed
Fix channel id -> type and require SAMPLE_DATATYPE_FLOAT.
MarkCallow
committed
Revert channel id->type changes.
MarkCallow
committed
Update language on use of VK_FORMAT_UNDEFINED.
MarkCallow
committed
Add note re. Vulkan ASTC HDR names.
MarkCallow
committed
Make supercompression statements for UASTC {,HDR} more generic.
MarkCallow
committed
Improve RDO language.
MarkCallow
committed
Fix RDO description.
MarkCallow
committed
Update for UASTC HDR 6x6.
MarkCallow
committed
Tweak formatting.
MarkCallow
committed
Fine tune UASTC HDR language for two block sizes.
MarkCallow
committed
Add KTXmapRange metadata.
MarkCallow
committed
Fine tune KTXmapRange.
MarkCallow
committed
Address review comments on KTXmapRange.
MarkCallow
committed
First cut at adding GPU Photo 6x6.
MarkCallow
committed
Use just GPU Photo to allow for future formats.
MarkCallow
committed
Align rebase bytesPlane changes coming with rebase.
MarkCallow
committed
Address further review comments.
MarkCallow
committed
Fix typo and say KTXmapRange values must be finite.
MarkCallow
committed
Make KTXmapRange language more normative.
MarkCallow
committed
Fix bad link and formatting in KTXmapRange equation.
MarkCallow
committed
Make this doc revision 5 (draft).
MarkCallow
committed
Move GPU Photo supercompression to vendor list.
MarkCallow
committed
Fix copy-paste error.
MarkCallow
committed
Update based on latest information from Binomial.
MarkCallow
committed
Rename Basis Universal ASTC to Basis Universal UASTC
MarkCallow
committed
Fix link to UASTC HDR 6x6 spec.
MarkCallow
committed
Add ToC.
MarkCallow
committed
Update rev history to note addition of ToC.
MarkCallow
committed
Fix texelDimension values and add requirement for sampleLower 0.
MarkCallow
committed
State that UASTC 6x6 6-byte header is not included.
MarkCallow
committed
Improve spec for calculating size of UASTC 6x6 images.
MarkCallow
committed
Address all but one of @lexaknyazev's comments.
MarkCallow
committed
Minor tweaks.
MarkCallow
committed
Address @lexaknyazev mapRange comments.
MarkCallow
committed
Make content block wider. Restore ribbon logo.
MarkCallow
committed
Remove deprecated max-width attribute.
MarkCallow
committed
Make files with incompatible formats and KTXmapRange invalid.
MarkCallow
committed
Restore UAH6i header; add rgbSliceType.
MarkCallow
committed
Address review comments.
MarkCallow
committed
Match compression type language used in latest Binomial bitstream specification.
MarkCallow
committed
Don't use undefined "word".
MarkCallow
committed
Add information on carriage of XUASTC LDR.
MarkCallow
committed
Add XUASTC metadata.
MarkCallow
committed
Improve language for XUASTC metadata items.
MarkCallow
committed
Specify restrictions in use of xuastc metadata.
MarkCallow
committed
Refine rules for XUASTC metadata.
MarkCallow
committed

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