VK_EXT_fragment_density_map mentions non-existent flag: VK_IMAGE_CREATE_FRAGMENT_DENSITY_MAP_OFFSETS_BIT_EXT

[wheeland]

https://github.com/KhronosGroup/Vulkan-Docs/blob/main/appendices/VK_EXT_fragment_density_map.txt mentions on line 146 that // All attachments must be created with VK_IMAGE_CREATE_FRAGMENT_DENSITY_MAP_OFFSETS_BIT_EXT.

However, this flag doesn't exist in the Vulkan headers nor in the rest of the Vulkan docs and is never mentioned anywhere else.

[wheeland]

There is VK_IMAGE_CREATE_FRAGMENT_DENSITY_MAP_OFFSET_BIT_QCOM from VK_QCOM_fragment_density_map_offset, but this extension is not required by VK_EXT_fragment_density_map, so the comment doesn't really seem to make a lot of sense here.

[jackohound]

Agree, the comment is wrong as it stands and this code sample is not intended to be dependent on VK_QCOM_fragment_density_map_offset extension. I think the line should simply be removed. I'll submit a fix.

[mnetsch]

Agreed, I think I made a copy+paste error when writing the offsets extension

[speedym]

@jackohound Note that there is the following wording in the spec: Subpass color and depth attachments can be created as subsampled, which can help to further optimize rendering in areas of low density. but the comment in the code says: Color attachments can be created with VK_IMAGE_CREATE_SUBSAMPLED_BIT_EXT.

Maybe the code comment could be clarified to include both depth & color attachments?