BufferUploads::CPUAccess Namespace Reference

Container for CPUAccess::Enum. More...

Typedefs
typedef unsigned	BitField

Enumerations
enum	Enum { Read = 1<<0, Write = 1<<1, WriteDynamic = (1<<2)|Write }
	Determines CPU access privileges More...

Detailed Description

Container for CPUAccess::Enum.

Enumeration Type Documentation

enum BufferUploads::CPUAccess::Enum

Determines CPU access privileges

Determines what access (if any) the CPU will have to the buffer. This can control how the object is stored in memory in into what memory it is stored.

It is always a good idea to use as few flags as possible. Many buffers should be fine with a CPUAccess flag of "0".

Note that this flag can change how the system performs upload operations. For example, in D3D11, when the CPUAccess::WriteDynamic flag is set, UpdateSubresource() can't be used to some types of buffers. In these cases, Map() is used instead.

Try to avoid "WriteDynamic" unless the buffer will be Locked multiple times per frame. If a buffer only needs to be updated once per frame (or less), use CPUAccess::Write

Enumerator
Read	CPU can read from this resource (using IManager::Resource_Readback)
Write	CPU can write to this resource, but will only do so once (or less) per frame.
WriteDynamic	CPU can write to this resource, and will lock it multiple times during a single per frame.