glGetBufferParameteriv — return parameters of a buffer object
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.
dataReturns the requested parameter.
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.
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.
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.
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/.