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KhronosGroup / Vulkan-Portability

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Add VkPhysicalDevicePortabilitySubsetFeaturesKHR:: samplingExplicitLODRepeatingEdgeAccuracyConformance capability #55

Open billhollings opened 2 years ago

billhollings commented 2 years ago

Some CTS tests fail on the sampling accuracy of all pixels when using explicit mipmap sampling with repeating edges.

This might be fixable with generally relaxed testing thresholds on the CTS tests.

In the meantime, these use cases can be disabled in CTS and reported as Not Supported, by adding a VkPhysicalDevicePortabilitySubsetFeaturesKHR:: samplingExplicitLODRepeatingEdgeAccuracyConformance capability.

This affects 7 CTS tests:

dEQP-VK.texture.explicit_lod.2d.sizes.31x55_nearest_linear_mipmap_nearest_repeat
dEQP-VK.texture.explicit_lod.2d.sizes.31x55_nearest_linear_mipmap_linear_repeat
dEQP-VK.texture.explicit_lod.2d.sizes.31x55_linear_linear_mipmap_linear_repeat
dEQP-VK.texture.explicit_lod.2d.sizes.57x35_nearest_linear_mipmap_nearest_repeat
dEQP-VK.texture.explicit_lod.2d.sizes.57x35_nearest_linear_mipmap_linear_repeat
dEQP-VK.texture.explicit_lod.2d.sizes.57x35_linear_linear_mipmap_nearest_repeat
dEQP-VK.texture.explicit_lod.2d.sizes.57x35_linear_linear_mipmap_linear_repeat
  Fail (Verification failed)