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Always use size_t for byte offsets #449

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merged 2 commits into from
Sep 2, 2023

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emimvi
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@emimvi emimvi commented Sep 2, 2023

Hi!

I had a glft file with a single large buffer which i then used in many bufferViews/accessors.
This ended up silently creating an invalid file with negative byteOffsets due to a size_t->int cast overflowing in serialization.

This request fixes that serialization bug, and uses size_t for all byte offsets, instead of a mix depending on struct (bufferView, accessor, accessor::Sparse)

@syoyo
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syoyo commented Sep 2, 2023

Good catch!

https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#_accessor_byteoffset

The spec says byteOffset is ">=0", so we can use size_t(uint).
Let me give some time to review the PR

@syoyo syoyo merged commit 3d445cc into syoyo:release Sep 2, 2023
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syoyo commented Sep 2, 2023

Merged! Thanks!

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2 participants