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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

05/02/2014 opengl.org