Implement support for ASTC compressed KTX textures - #37

Merged

JimBobSquarePants merged 159 commits into

SixLabors:mainfrom

Erik-White:implement-astc-decoding

Jul 30, 2026

Commits on Feb 27, 2026

Add ASTC decoding support
Erik-White
committed
6577b4c
Integrate AstcSharp ASTC decoder
Erik-White
committed
6e58d6f
Use existing test utils for Astc tests
Erik-White
committed
0aba876
Add HDR support
Erik-White
committed
44599c8
Fix overflow issue
Erik-White
committed
724bd61
Move KTX1 test images to subdirectories
Erik-White
committed
abd3b4c

Commits on Mar 6, 2026

Remove unused AstcSharp reference
Erik-White
committed
86ff81a
Small fixes and variable naming
Erik-White
committed
94d0f72
Astc files are little endian
Erik-White
committed
e7ce5fa
Update shared infra
Erik-White
committed
1d3acec

Commits on Mar 11, 2026

Add more defensive checks for ASTC input
Erik-White
committed
438959e

Commits on May 9, 2026

Remove unused decoder overload
Erik-White
committed
fd19b63
Use correct pixel format for VK_FORMAT_R16G16B16A16_SFLOAT
Erik-White
committed
58814e5
Add R16G16_SFLOAT, R16G16B16_SFLOAT, R32_SFLOAT, BC3_UNORM_BLOCK support
Erik-White
committed
ee624ca
Add cubemap test extension
Erik-White
committed
ccc9737
Use standard library methods for swapping endianess
Erik-White
committed
a7a0b55
Avoid partial reads
Erik-White
committed
a232b62
Guard against malformed cubemaps
Erik-White
committed
42bed20
Tests for new guards
Erik-White
committed
3af005b
Validate block lengths and dimensions
Erik-White
committed
42caec4
Document sRGB handling
Erik-White
committed
8085dc9
Add explicit handling for vulkan formats
Erik-White
committed
aaac865
Implement support for sfloat block types
Erik-White
committed
063f551
Add guards for non seekable streams
Erik-White
committed
f426588
Avoid boxing conversions in TryGetBits
Erik-White
committed
c9e3014
Consolidate overlapping endian handlers
Erik-White
committed
73424dd
Prevent buffer corruption in ShiftBuffer
Erik-White
committed
4ca0f94
Correctly handle arraypool semantics
Erik-White
committed
4d393b4
Address thread safety in BISD and DecimationTable
Erik-White
committed
734dd5c
Make sure to throw when HDR endpoint is sent to DecodeColorsForMode
Erik-White
committed
1a794cd
Don't silently truncate HDR via LDR API
Erik-White
committed
17cc728
Tighten image comparison tolerances
Erik-White
committed
f0edcb0
Improve readme
Erik-White
committed
b38bfda
Major tidy up of minor details
Erik-White
committed
cfc8ef9
Fix the astcencodercsharp dependency path
Erik-White
committed
f53d718
Combine DecodeBiseValues and DecodeBiseWeights
Erik-White
committed
2a3e400
Combine writer methods for fused LDR/HDR decoders
Erik-White
committed
af204fd

Commits on May 10, 2026

Fix benchmarks test data path
Erik-White
committed
cdf6a9e
Clean up and formatting
Erik-White
committed
b9eb410
Split out test methods from LogicalBlock
Erik-White
committed
9ce3e3b
Refactor LogicalBlock tests to remove intrusive, low value tests
Erik-White
committed
9ba4575
Move LnsToSf16 out of LogicalBlock
Erik-White
committed
6697e13
Clean up unused methods in Partition
Erik-White
committed
db6ae9c
Refactor decoder to simplify where possible
Erik-White
committed
a6307c6
Refactor large encoding methods to smaller, more understandable units
Erik-White
committed
7620476
Split out private classes
Erik-White
committed
e165ec6
Continue refactoring to break down large encoding methods
Erik-White
committed
7d89e04
Split up and refactor block methods
Erik-White
committed
02e6f8e
Split up split/search/write phases to separate opeations
Erik-White
committed
f4bd0be
Refactor and split up DecodeAllBlocks for LDR/HDR
Erik-White
committed
641e14c
Consolidate bit placement logic via ApplyBitPlacements
Erik-White
committed
5720aaf
Extract common swap/pack function
Erik-White
committed
d0f25cd
Remove IntermediateBlock
Erik-White
committed
06425f6
remove redundant endpoint.IsHdr branch
Erik-White
committed
e02a617
Unify DecodeAllBlocks methods
Erik-White
committed
e317acb
Streamline DecompressBlock methods to thin wrappers
Erik-White
committed
dcf5c8f
Cache partitions across blocks
Erik-White
committed
22b3cf1
Consolidate interpolation functions
Erik-White
committed
163434c
Reference ASTC spec in pipeline where possible
Erik-White
committed
d909006
Consolidate small repeated functions
Erik-White
committed
68dcfcd

Commits on May 13, 2026

Reorganize ASTC decoder
Erik-White
committed
28ff800
Remove state from BIS decoder
Erik-White
committed
872cb18
Consolidate EndpointCodec API
Erik-White
committed
d9806de

Commits on May 14, 2026

Combine LDR and HDR endpoint decode
Erik-White
committed
36cfc81
Avoid allocating LogicalBlock on the heap
Erik-White
committed
053ae6b
Annotate usage of stackalloc
Erik-White
committed
60dd5e5
Encapsulate block state during decoding
Erik-White
committed
4d0f25f
Extract HDR/LDR pixel methods from LogicalBlock
Erik-White
committed
e153824
Invert void extent check
Erik-White
committed
24a5e6d
Simplify bit placement lookup
Erik-White
committed
1badfa0
Store ordered encoding modes once
Erik-White
committed
a84e5f1
Store channel count in single location
Erik-White
committed
b0bb03a
Calculate BISE block size in one place
Erik-White
committed
2a01aeb
Move blend methods to interpolation
Erik-White
committed
bf49f40
TryReadBlockBits no longer needed
Erik-White
committed
9801606
Try to limit mutation of Partition
Erik-White
committed
dd517b4
Skip redundant bounds checks for bit count
Erik-White
committed
6093e2b
Remove redundant fields on Partition
Erik-White
committed
f51c202
Clean up BlueContract swap path
Erik-White
committed
380dc90
Move Rgba extensions to ColorEncoding
Erik-White
committed
a7bac74
Fix potential race in Partition construction
Erik-White
committed
c408084
Encapsulate IsFusable on BlockInfo
Erik-White
committed
3fc63b7
Build QuantizationMaps from static constructors
Erik-White
committed
4eeb587
Clean up redundant methods, properties, arguments
Erik-White
committed
4d88f9b
Don't silently fail on invalid blocks
Erik-White
committed
f378bbc
Don't return nullable quant maps
Erik-White
committed
b121b1c
Don't need to fully qualify names
Erik-White
committed
af22aef
Combine unquantize functions
Erik-White
committed
29e3405
return correct mode
Erik-White
committed
7dc6da6
BISE can be static
Erik-White
committed
cfcd86e
Small cleanups in BISE
Erik-White
committed
f6e5efb
Note swap semantics
Erik-White
committed
f9f9aa3
Tiny tidy
Erik-White
committed
07c91cb
BlockInfo should be immutable
Erik-White
committed
7fde153
Simplify CopyBlockRect
Erik-White
committed
94c15ee
Test for HDR void-extent blocks
Erik-White
committed
3b9bb20
Add regression tests for multithreaded and block decoding
Erik-White
committed
6d7aec2
Move references tests to main test project
Erik-White
committed
ccefd1b
Add LDR/HDR reference benchmarks
Erik-White
committed
2d0d52d
Add reference persistence benchmark
Erik-White
committed
bee1074
Add larger HDR test files
Erik-White
committed
b9363b1

Commits on May 15, 2026

Add fuzzing tests with FuzzSharp
Erik-White
committed
4704375
Add support for fuzzing with libfuzzer
Erik-White
committed
cb7bf3e
Increase fuzzing coverage
Erik-White
committed
06e8257
Use ImageSharp guards
Erik-White
committed
4487d89
Remove old reference tests project
Erik-White
committed
ab09b5b
Rename HDR namespace to titlecase for consistency
Erik-White
committed
6fa49d9
Merge branch 'main' into implement-astc-decoding
Erik-White
committed
11758b9
Reorganize test data for consistency
Erik-White
committed
8e244ec
Add stream based overloads for AstcDecoder
Erik-White
committed
cae17ca
Use ImageSharp allocator
Erik-White
committed
845b24e
Improve ktx1 ASTC test coverage
Erik-White
committed
c0ff0f6
Fix off-by-one error in LDR quantization
Erik-White
committed
100aa5c

Commits on May 16, 2026

Revise doc references and include sources in repo
Erik-White
committed
e999744
Make sure to dispose images in tests
Erik-White
committed
35c78e2
Fix race in test output paths
Erik-White
committed
91317c6
Consolidate Hdr properties for BlockInfo
Erik-White
committed
d916af9
Clean up redundant code in DecompressImage
Erik-White
committed
6bf7b5a
Use integer maths for scale factor
Erik-White
committed
31a9def
Simplify partition cache key
Erik-White
committed
4933ec1
BlockModeDecoder lookup tables should be static
Erik-White
committed
d8ddf54
Enforce read only properties where possible
Erik-White
committed
07efe2d
Remove remaining encoding related code
Erik-White
committed
270bdd1
Use centralized value for channel count
Erik-White
committed
83c761c
Remove redundant argument name parameters
Erik-White
committed
060af19
Combine and simplify reference benchmark cases
Erik-White
committed
7e20e5f
Avoid buffer allocation overhead for reference decoder benchmark
Erik-White
committed
0af7e7a
Use ARM decoder as benchmark baseline
Erik-White
committed
83eae61
Write magenta error colour instead of black, or throwing
Erik-White
committed
ecc374e

Commits on May 17, 2026

Build fixes and tidy up
Erik-White
committed
5b216b3
Fix race condition with file name collisions
Erik-White
committed
e095e12
Convenience method for comparing cubemap faces
Erik-White
committed
7441ddf
Support test data subdirectories
Erik-White
committed
07793ba
Make sure to correctly dispose images in test
Erik-White
committed
d2f9574
Standarize existing KTX1 test
Erik-White
committed
5e0c597
Suppress strong naming warning for interactive tests
Erik-White
committed
4fffeda
Low dynamic range ASTC decoding
Erik-White
committed
5f07655
Low dynamic range ASTC decoding
Erik-White
committed
de13c78
Low dynamic range ASTC decoding
Erik-White
committed
9141144
Implement HDR decoding
Erik-White
committed
937643a
Add reference tests using ARM ASTC decoder
Erik-White
committed
cc9f338
Add benchmarks project
Erik-White
committed
542b32b

Commits on May 18, 2026

Update shared infra
Erik-White
committed
b2ed142
Implement ASTC decoding for KTX1
Erik-White
committed
1ba622f
Implement KTX2 ASTC decoding
Erik-White
committed
1f1c407

Commits on May 19, 2026

Fix missing access modifier
Erik-White
committed
57b80e0
Use correct access modifier
Erik-White
committed
14228a1

Commits on Jul 27, 2026

Fixes and improvements
Erik-White
committed
73539fc
Use standard library method for powers of two
Erik-White
committed
f7307c0
Tidy up
Erik-White
committed
cfa796a
Generic method for decoding dual plane
Erik-White
committed
c464704
Logical improvements
Erik-White
committed
d9c3cf0
Fully stream based decoding
Erik-White
committed
cd40455
Update readme
Erik-White
committed
7191a3c
Remove fuzz testing project
Erik-White
committed
9d8091c
Update benchmarks for streaming API
Erik-White
committed
93acb93
Merge remote-tracking branch 'upstream/main' into implement-astc-decoding
Erik-White
committed
91f6a15

Commits on Jul 28, 2026

Clean up, use constants instead of magic numbers where possible
Erik-White
committed
cfd288c
Clean up tests and improve comments
Erik-White
committed
8cf9fc3