Luna::RHI::IBuffer::unmap

virtual void unmap(usize write_begin, usize write_end)=0

Invalidates the pointer to the mapped data, and synchronizes changed data with device when needed. Map/unmap operations are reference counted, for each map operation, you need to call unmap once to finally unmap the memory.

Parameters

• in write_begin

  The offset, in bytes, of the beginning of the data range that is changed by CPU and should be synchronized.

• in write_end

  The offset, in bytes, of the ending of the data range that is changed by CPU and should be synchronized.

If write_begin <= write_end, no data will be synchronized, which is required if resource heap type is not MemoryType::upload.

If write_end is larger than the subresource size (like setting to USIZE_MAX), the write range will be clamped to [write_begin, resource_size).