glCopyBufferSubData man page on RedHat
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GLCOPYBUFFERSUBDATA(3G) OpenGL Manual GLCOPYBUFFERSUBDATA(3G)
NAME
glCopyBufferSubData - copy part of the data store of a buffer object to
the data store of another buffer object
C SPECIFICATION
void glCopyBufferSubData(GLenum readtarget, GLenum writetarget,
GLintptr readoffset, GLintptr writeoffset,
GLsizeiptr size);
PARAMETERS
readtarget
Specifies the target from whose data store data should be read.
writetarget
Specifies the target to whose data store data should be written.
readoffset
Specifies the offset, in basic machine units, within the data store
of readtarget from which data should be read.
writeoffset
Specifies the offset, in basic machine units, within the data store
of writetarget to which data should be written.
size
Specifies the size, in basic machine units, of the data to be
copied from readtarget to writetarget.
DESCRIPTION
glCopyBufferSubData copies part of the data store attached to
readtarget to the data store attached to writetarget. The number of
basic machine units indicated by size is copied from the source, at
offset readoffset to the destination at writeoffset, also in basic
machine units.
readtarget and writetarget must be GL_ARRAY_BUFFER,
GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER, GL_ELEMENT_ARRAY_BUFFER,
GL_PIXEL_PACK_BUFFER, GL_PIXEL_UNPACK_BUFFER, GL_TEXTURE_BUFFER,
GL_TRANSFORM_FEEDBACK_BUFFER or GL_UNIFORM_BUFFER. Any of these targets
may be used, although the targets GL_COPY_READ_BUFFER and
GL_COPY_WRITE_BUFFER are provided specifically to allow copies between
buffers without disturbing other GL state.
readoffset, writeoffset and size must all be greater than or equal to
zero. Furthermore, readoffset + size must not exceeed the size of the
buffer object bound to readtarget, and readoffset + size must not
exceeed the size of the buffer bound to writetarget. If the same buffer
object is bound to both readtarget and writetarget, then the ranges
specified by readoffset, writeoffset and size must not overlap.
NOTES
glCopyBufferSubData is available only if the GL version is 3.1 or
greater.
ERRORS
GL_INVALID_VALUE is generated if any of readoffset, writeoffset or size
is negative, if readoffset + size exceeds the size of the buffer object
bound to readtarget or if writeoffset + size exceeds the size of the
buffer object bound to writetarget.
GL_INVALID_VALUE is generated if the same buffer object is bound to
both readtarget and writetarget and the ranges [readoffset, readoffset
+ size) and [writeoffset, writeoffset + size) overlap.
GL_INVALID_OPERATION is generated if zero is bound to readtarget or
writetarget.
GL_INVALID_OPERATION is generated if the buffer object bound to either
readtarget or writetarget is mapped.
SEE ALSO
glGenBuffers(), glBindBuffer(), glBufferData(), glBufferSubData(),
glGetBufferSubData()
COPYRIGHT
Copyright © 2010 Khronos Group. This material may be distributed
subject to the terms and conditions set forth in the Open Publication
License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.
AUTHORS
opengl.org
opengl.org 03/16/2013 GLCOPYBUFFERSUBDATA(3G)
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