Interface GPUBufferDescriptor

If true creates the buffer in an already mapped state, allowing getMappedRange to be called immediately. It is valid to set mappedAtCreation to true even if usage does not contain MAP_READ or MAP_WRITE. This can be used to set the buffer's initial data. Guarantees that even if the buffer creation eventually fails, it will still appear as if the mapped range can be written/read to until it is unmapped.

The size of the buffer in bytes.

The allowed usages for the buffer.