copy-buffer ( to-buffer-ptr: buffer-ptr from-buffer-ptr: buffer-ptr size: integer -- )
GPU-accelerated rendering » Buffer objects

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Vocabulary
gpu.buffers

Inputs

to-buffer-ptr	a buffer-ptr
from-buffer-ptr	a buffer-ptr
size	an integer

Outputs
None

Word description
Instructs the GPU to asynchronously copy size bytes from from-buffer-ptr into to-buffer-ptr.

Notes
This word requires that the graphics context support OpenGL 3.1 or the GL_ARB_copy_buffer extension.

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

Definition

USING: accessors opengl.gl typed ;

IN: gpu.buffers

TYPED:: copy-buffer
    ( to-buffer-ptr: buffer-ptr from-buffer-ptr: buffer-ptr size: integer -- )
    GL_COPY_WRITE_BUFFER to-buffer-ptr buffer>> glBindBuffer
    GL_COPY_READ_BUFFER from-buffer-ptr buffer>> glBindBuffer
    GL_COPY_READ_BUFFER GL_COPY_WRITE_BUFFER from-buffer-ptr
    offset>> to-buffer-ptr offset>> size glCopyBufferSubData ;