2012 Khronos Group
glInvalidateBufferSubData 3G
glInvalidateBufferSubData invalidate a region of a buffer object's data store

## C Specification

void `glInvalidateBufferSubData` GLuint buffer GLintptr offset GLsizeiptr length

## Parameters

buffer

  The name of a buffer object, a subrange of whose data store to invalidate.

offset

  The offset within the buffer's data store of the start of the range to be invalidated.

length

  The length of the range within the buffer's data store to be invalidated.

## Description

`glInvalidateBufferSubData` invalidates all or part of the content of the data store of a buffer object. After invalidation, the content of the specified range of the buffer's data store becomes undefined. The start of the range is given by offset and its size is given by length, both measured in basic machine units.

## Errors

`GL_INVALID_VALUE` is generated if offset or length is negative, or if offset + length is greater than the value of `GL_BUFFER_SIZE` for buffer.

`GL_INVALID_VALUE` is generated if buffer is not the name of an existing buffer object.

`GL_INVALID_OPERATION` is generated if any part of buffer is currently mapped.

## Associated Gets

glGetBufferParameter with argument `GL_BUFFER_SIZE`

## See Also

glInvalidateTexSubImage,, glInvalidateTexImage, glInvalidateBufferData, glInvalidateFramebuffer, glInvalidateSubFramebuffer.

## Copyright

Copyright 2012 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/.