| Portability | portable |
|---|---|
| Stability | stable |
| Maintainer | Sven Panne <svenpanne@gmail.com> |
| Safe Haskell | None |
Graphics.Rendering.OpenGL.GL.QueryObjects
Description
This module corresponds to section 4.2 (Query Objects and Asynchronous Queries) of the OpenGL 4.4 specs.
- data QueryObject
- type QueryIndex = GLuint
- maxVertexStreams :: GettableStateVar QueryIndex
- data QueryTarget
- beginQuery :: QueryTarget -> QueryObject -> IO ()
- endQuery :: QueryTarget -> IO ()
- withQuery :: QueryTarget -> QueryObject -> IO a -> IO a
- currentQuery :: QueryTarget -> GettableStateVar (Maybe QueryObject)
- queryCounterBits :: QueryTarget -> GettableStateVar GLsizei
- queryResultAvailable :: QueryObject -> GettableStateVar Bool
- class Storable a => QueryResult a
- queryResult :: QueryResult a => QueryObject -> GettableStateVar a
- timestampQuery :: QueryObject -> IO ()
- timestamp :: GettableStateVar GLuint64
Creating and Delimiting Queries
data QueryObject Source
type QueryIndex = GLuintSource
data QueryTarget Source
Constructors
| SamplesPassed | |
| AnySamplesPassed | |
| AnySamplesPassedConservative | |
| TimeElapsed | |
| PrimitivesGenerated QueryIndex | |
| TransformFeedbackPrimitivesWritten QueryIndex |
Instances
beginQuery :: QueryTarget -> QueryObject -> IO ()Source
endQuery :: QueryTarget -> IO ()Source
withQuery :: QueryTarget -> QueryObject -> IO a -> IO aSource
Convenience function for an exception-safe combination of beginQuery and
endQuery.
Query Target Queries
Query Object Queries
class Storable a => QueryResult a Source
queryResult :: QueryResult a => QueryObject -> GettableStateVar aSource
Time Queries
timestampQuery :: QueryObject -> IO ()Source
Record the time after all previous commands on the GL client and server state and the framebuffer have been fully realized
timestamp :: GettableStateVar GLuint64Source
Contains the GL time after all previous commands have reached the GL server but have not yet necessarily executed.