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GLGETBUFFERPARAMETER(3G)                         OpenGL 3.3                         GLGETBUFFERPARAMETER(3G)



NAME
       glGetBufferParameteriv - return parameters of a buffer object

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

PARAMETERS
       target
           Specifies the target buffer object. The symbolic constant must be GL_ARRAY_BUFFER,
           GL_ELEMENT_ARRAY_BUFFER, GL_PIXEL_PACK_BUFFER, or GL_PIXEL_UNPACK_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.

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 (C) 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/.



OpenGL 3.3                                       03/08/2011                         GLGETBUFFERPARAMETER(3G)