glGenBuffers, glBindBuffer, glBufferData, glBufferSubData, glGetBufferSubData
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/.
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glCopyBufferSubData: man3/glCopyBufferSubData.xml
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.
glCopyBufferSubData is available only if the GL version is 3.1 or greater.