glGetBufferPointerv : PyOpenGL 3.0.2 GL Man Pages

return the pointer to a mapped buffer object's data store

Signature

glGetBufferPointerv( GLenum ( target ) , GLenum ( pname ) , GLvoid ** ( params ) )-> void

glGetBufferPointerv( target , pname , params )

Retrieve a ctypes pointer to buffer's data

Parameters

Variables	Description
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 .
pname	Specifies the pointer to be returned. The symbolic constant must be GL_BUFFER_MAP_POINTER .
params	Returns the pointer value specified by pname .

Description

glGetBufferPointerv returns pointer information. pname is a symbolic constant indicating the pointer to be returned, which must be GL_BUFFER_MAP_POINTER , the pointer to which the buffer object's data store is mapped. If the data store is not currently mapped, NULL is returned. params is a pointer to a location in which to place the returned pointer value.

Notes

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

The initial value for the pointer is NULL .

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 pname is not an accepted value.

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

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/ .

glGetBufferPointerv