@rygorous Er, since when are mipmap sizes rounded up from the previous dimension
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@rygorous Er, since when are mipmap sizes rounded up from the previous dimension?
If I feed a 123x456 image to texconv, the first mip is 61x228. Vulkan Images chapter apparently doesn't specify rounding (time for a bug report!), ARB_texture_non_power_of_two spec explicitly rounds down, DirectXTex rounds down, NVIDIA's got a paper on this saying round down, and I've been dealing with this issue directly for a couple months.
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@rygorous Er, since when are mipmap sizes rounded up from the previous dimension?
If I feed a 123x456 image to texconv, the first mip is 61x228. Vulkan Images chapter apparently doesn't specify rounding (time for a bug report!), ARB_texture_non_power_of_two spec explicitly rounds down, DirectXTex rounds down, NVIDIA's got a paper on this saying round down, and I've been dealing with this issue directly for a couple months.
@EricLasota @rygorous Huh. I was also sure it rounded up, but nope - the spec in DX11.3 is clear - it rounds down.
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@EricLasota @rygorous Huh. I was also sure it rounded up, but nope - the spec in DX11.3 is clear - it rounds down.
@TomF @rygorous The Vulkan spec actually says round up but the validation layer rounds down, whee
edit: Bug report deployed! https://github.com/KhronosGroup/Vulkan-Docs/issues/2588
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