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Cam Mannett
e08871d5c0
When vkCmdBuildAccelerationStructuresKHR is called, the input buffers used for the build are copied into host-accessible memory, so when initial state serialisation is triggers it can be copied into the capture file. To unify the behaviour of the different geometry types, there is only one readback buffer per AS, and in the case of triangle data it can contain the vertex, index, and transform data concatenated into a single contiguous block. The buffer data along with build arguments are stored in a ref-counted VkAccelerationStructureInfo object held by the AS's VkResourceRecord. Once the info object is destroyed, then the copied buffer mem is also freed. Serialisation of the initial state will follow in later patches. Caveats: * vkCmdBuildAccelerationStructuresIndirectKHR is not handled * VkAccelerationStructureGeometryInstancesDataKHR::arrayOfPointers mode is not handled