OpenGL-2.2.1.1: A binding for the OpenGL graphics system Contents Index

Graphics.Rendering.OpenGL.GLU.Errors Portability portable Stability stable Maintainer sven.panne@aedion.de

Description

This module corresponds to section 2.5 (GL Errors) of the OpenGL 2.1 specs and chapter 8 (Errors) of the GLU specs, offering a generalized view of errors in GL and GLU.

Synopsis

data Error = Error ErrorCategory String data ErrorCategory = InvalidEnum | InvalidValue | InvalidOperation | StackOverflow | StackUnderflow | OutOfMemory | TableTooLarge | TesselatorError | NURBSError errors :: GettableStateVar [Error]

Documentation

data Error

GL/GLU errors consist of a general error category and a description of what went wrong. Constructors Error ErrorCategory String Instances Eq Error Ord Error Show Error

data ErrorCategory

General GL/GLU error categories Constructors InvalidEnum InvalidValue InvalidOperation StackOverflow StackUnderflow OutOfMemory TableTooLarge TesselatorError NURBSError Instances Eq ErrorCategory Ord ErrorCategory Show ErrorCategory

errors :: GettableStateVar [Error]

When an error occurs, it is recorded in this state variable and no further errors are recorded. Reading errors returns the currently recorded errors (there may be more than one due to a possibly distributed implementation) and resets the state variable to [], re-enabling the recording of future errors. The value [] means that there has been no detectable error since the last time errors was read, or since the GL was initialized.

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