2012 Khronos Group
glClearBufferData 3G
glClearBufferData fill a buffer object's data store with a fixed value

## C Specification

void `glClearBufferData` GLenum target GLenum internalformat GLenum format GLenum type const void * data

## Parameters

target

  Specify the target of the operation. target must be one of the global buffer binding targets.

internalformat

  The internal format with which the data will be stored in the buffer object.

size

  The size, in basic machine units of the range of the data store to fill.

format

  The format of the data in memory addressed by data.

type

  The type of the data in memory addressed by data.

data

  The address of a memory location storing the data to be replicated into the buffer's data store.

## Description

`glClearBufferData` fills the entirety of a buffer object's data store with data from client memory. Data, initially supplied in a format specified by format in data type type is read from the memory address given by data and converted into the internal representation given by internalforamt. This converted data is then replicated throughout the buffer object's data store.

If data is NULL, then the buffer's data store is filled with zeros.

## Errors

`GL_INVALID_ENUM` is generated if target not one of the generic buffer binding targets.

`GL_INVALID_VALUE` is generated if no buffer is bound to target.

`GL_INVALID_ENUM` is generated if internalformat is not a sized internal format.

`GL_INVALID_OPERATION` is generated if any part of the buffer's data store is mapped with glMapBufferRange or glMapBuffer.

## See Also

glClearBufferSubData.

## Copyright

Copyright 2011-2012 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/.