Buffer

Holds a block of GPU memory. The length of a buffer cannot be changed after creation.

Types

BufferProps

Property	Type	Description
usage?	number	Bit mask of Usage flags
byteLength?	number	Length of buffer (cannot be changed after creation).
data?	ArrayBuffer | ArrayBufferView	Data to be copied into buffer. byteLength will be deduced if not supplied.
byteOffset?	number	Offset for data
indexType?	'uint16' | 'uint32'	If props.usage & Buffer.INDEX

Usage

Usage expresses two things: The type of buffer and what operations can be performed on it.

Note that the allowed combinations are very limited, especially in WebGPU.

Usage Flag	Value	Description
Buffer.INDEX	0x0010	An index buffer (array of 16 or 32 bit unsigned integers
Buffer.VERTEX	0x0020	A vertex buffer (a binary column)
Buffer.UNIFORM	0x0040	A uniform buffer
Buffer.STORAGE	0x0080	A storage buffer
Buffer.INDIRECT	0x0100
Buffer.QUERY_RESOLVE	0x0200
Buffer.MAP_READ	0x01	Whether the buffer can be mapped for read
Buffer.MAP_WRITE	0x02	Whether the buffer can be mapped for write
Buffer.COPY_SRC	0x0004	Supports commandEncoder.copyBufferTo...
Buffer.COPY_DST	0x0008	Supports commandEncoder.copy...ToBuffer

Members

• device: Device - holds a reference to the Device that created this Buffer.
• handle: unknown - holds the underlying WebGL or WebGPU shader object
• props: BufferProps - holds a copy of the BufferProps used to create this Buffer.

Methods

constructor(props: BufferProps)

Buffer is an abstract class and cannot be instantiated directly. Create with device.createBuffer(...).

destroy(): void

Free up any GPU resources associated with this buffer immediately (instead of waiting for garbage collection).