GLAPI/glGetBufferParameter

glGetBufferParameteriv

Core in version		4.6
Core since version		1.5

glGetBufferParameteriv: return parameters of a buffer object

Function Definition

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

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_QUERY_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.

The GL_QUERY_BUFFER target is available only if the GL version is 4.4 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, glMapBufferRange, glMapBuffer, glUnmapBuffer

Copyright

Copyright © 2005 Addison-Wesley. Copyright © 2010-2013 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/.