Graphics.GL.Low.Framebuffer

Framebuffers, FBO, RBO...

Example

This example program renders an animating object to an off-screen framebuffer. The resulting texture is then show on a full-screen quad with an effect.

The vertex shader for this program is

The two fragment shaders, one for the object, one for the effect, are

And the output looks like

Documentation

newFBO :: IO FBO

Create a new framebuffer object. Before the framebuffer can be used for rendering it must have a color image attachment.

bindFramebuffer :: Framebuffer a => a -> IO ()

Binds an FBO or the default framebuffer to the framebuffer binding target. Replaces the framebuffer already bound there.

deleteFBO :: FBO -> IO ()

Delete an FBO.

attachTex2D :: Attachable a => Tex2D a -> IO ()

Attach a 2D texture to the FBO currently bound to the framebuffer binding target.

attachCubeMap :: Attachable a => CubeMap a -> Side -> IO ()

Attach one of the sides of a cubemap texture to the FBO currently bound to the framebuffer binding target.

attachRBO :: Attachable a => RBO a -> IO ()

Attach an RBO to the FBO currently bound to the framebuffer binding target.

newRBO :: InternalFormat a => Int -> Int -> IO (RBO a)

Create a new renderbuffer with the specified dimensions.

deleteRBO :: RBO a -> IO ()

Delete an RBO.

data FBO

A framebuffer object is an alternative rendering destination. Once an FBO is bound to framebuffer binding target, it is possible to attach images (textures or RBOs) for color, depth, or stencil rendering.

Instances

Show FBO

GLObject FBO

Framebuffer FBO

data DefaultFramebuffer

The default framebuffer.

Constructors

DefaultFramebuffer

Instances

Show DefaultFramebuffer

Default DefaultFramebuffer

Framebuffer DefaultFramebuffer

data RBO a

An RBO is a kind of image object used for rendering. The only thing you can do with an RBO is attach it to an FBO.

Instances

Show (RBO a)

GLObject (RBO a)