read-buffer ( buffer-ptr: buffer-ptr size: integer -- data: byte-array )
GPU-accelerated rendering » Buffer objects

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Vocabulary
gpu.buffers

Inputs

buffer-ptr	a buffer-ptr
size	an integer

Outputs

data	a byte-array

Word description
Reads size bytes from buffer into a new byte-array.

See also
allocate-buffer, allocate-byte-array, buffer-size, update-buffer, copy-buffer, with-mapped-buffer

Definition

USING: accessors byte-arrays gpu.buffers.private opengl.gl typed
;

IN: gpu.buffers

TYPED:: read-buffer
    ( buffer-ptr: buffer-ptr size: integer -- data: byte-array )
    buffer-ptr buffer>> :> buffer buffer bind-buffer :> target
    size <byte-array> :> data target buffer-ptr offset>> size
    data glGetBufferSubData data ;