Comments (4)
MarkCallow
commented on July 20, 2024
1
toktx (in the ktx2 branch) now supports PNG input. It can create .ktx and .ktx2 files. I could not use stb_image.h because it does not provide access to PNG auxiliary chunks which are needed for color correctness of the created textures.
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MarkCallow
commented on July 20, 2024
1
I miswrote. Sorry! They're called ancillary chunks. You should be able to find the information using the proper name. I've now corrected my previous comment.
The change to load PNG ancillary chunks was made in PR #96.
PR #102 also has a change related to color correctness. Converting Netpbm input files from BT.709's OETF to sRGB's.
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MarkCallow
commented on July 20, 2024
Yup. It's on the TO DO list.
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rotoglup
commented on July 20, 2024
Hello @MarkCallow, this is great :) Would you mind sharing a link to the relevant code or commit ? I'd like to learn more about the ancillary chunks, but GitHub search did not help me on this... Thanks
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Related Issues (20)
- Allow A8B8G8R8 PACK32 formats
- Loading KTX1 and KTX2 file on Linux/OpenGL 4.3 leads to weird error if not luch the program with sudo HOT 4
- Project install installs fmt lib HOT 1
- Preceding `ktx` command name with option leads to error HOT 1
- WebGL test gets shader compile error
- Converting transfer functions (using assign-oetf and convert-oetf) HOT 15
- samplePositions possibly incorrect for single-plane 4:2:2 YUV formats HOT 4
- The JNI binding for input swizzling is broken
- No option to apply `zstd`/`zlib` compression via JNI HOT 21
- Improvements for the Java/JNI bindings HOT 4
- Synchronizing auto-generated files with bindings HOT 2
- How to call `CreateFromMemory`? HOT 2
- Memoy leak when ktxTexture2_DeflateZstd fails
- Running in docker container (GLIBC not found error) HOT 2
- CI build scripts prevent local use with test updates by initializing CTS submodule
- Skipping mipmaps when loading from disk HOT 2
- The execution speed of the ktxTexture2_CompressBasisEx method is quite slow HOT 15
- No definition for ktxTexture2_Destroy in ktx.h HOT 3
- Enabling Automatic Mipmap Generation Causes Validation Error HOT 1
- ktxTexture_SetImageFromMemory should document pointer lifetime guarantees HOT 2
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