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GLGETBUFFERPARAMETER(3G)	 OpenGL Manual	      GLGETBUFFERPARAMETER(3G)

NAME
       glGetBufferParameteriv - return parameters of a buffer object

C SPECIFICATION
       void glGetBufferParameteriv(GLenum target, GLenum value, GLint * data);

       void glGetBufferParameteri64v(GLenum target, GLenum value,
				     GLint64 * data);

PARAMETERS
       target
	   Specifies the target buffer object. The symbolic constant must be
	   GL_ARRAY_BUFFER, GL_ATOMIC_COUNTER_BUFFER, GL_COPY_READ_BUFFER,
	   GL_COPY_WRITE_BUFFER, GL_DRAW_INDIRECT_BUFFER,
	   GL_DISPATCH_INDIRECT_BUFFER, GL_ELEMENT_ARRAY_BUFFER,
	   GL_PIXEL_PACK_BUFFER, GL_PIXEL_UNPACK_BUFFER,
	   GL_SHADER_STORAGE_BUFFER, GL_TEXTURE_BUFFER,
	   GL_TRANSFORM_FEEDBACK_BUFFER, or GL_UNIFORM_BUFFER.

       value
	   Specifies the symbolic name of a buffer object parameter. Accepted
	   values are GL_BUFFER_ACCESS, GL_BUFFER_MAPPED, GL_BUFFER_SIZE, or
	   GL_BUFFER_USAGE.

       data
	   Returns the requested parameter.

DESCRIPTION
       glGetBufferParameteriv returns in data a selected parameter of the
       buffer object specified by target.

       value names a specific buffer object parameter, as follows:

       GL_BUFFER_ACCESS

	   params returns the access policy set while mapping the buffer
	   object. The initial value is GL_READ_WRITE.

       GL_BUFFER_MAPPED

	   params returns a flag indicating whether the buffer object is
	   currently mapped. The initial value is GL_FALSE.

       GL_BUFFER_SIZE

	   params returns the size of the buffer object, measured in bytes.
	   The initial value is 0.

       GL_BUFFER_USAGE

	   params returns the buffer object's usage pattern. The initial value
	   is GL_STATIC_DRAW.

NOTES
       If an error is generated, no change is made to the contents of data.

       The GL_ATOMIC_COUNTER_BUFER target is available only if the GL version
       is 4.2 or greater.

       The GL_DISPATCH_INDIRECT_BUFFER and GL_SHADER_STORAGE_BUFFER targets
       are available only if the GL version is 4.3 or greater.

ERRORS
       GL_INVALID_ENUM is generated if target or value is not an accepted
       value.

       GL_INVALID_OPERATION is generated if the reserved buffer object name 0
       is bound to target.

SEE ALSO
       glBindBuffer(), glBufferData(), glMapBuffer(), glUnmapBuffer()

COPYRIGHT
       Copyright © 2005 Addison-Wesley. 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	      GLGETBUFFERPARAMETER(3G)

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