Copyright	(c) Sven Panne 2002-2019
License	BSD3
Maintainer	Sven Panne <svenpanne@gmail.com>
Stability	stable
Portability	portable
Safe Haskell	None
Language	Haskell2010

Graphics.Rendering.OpenGL.GL.PerFragment

Contents

Discarding Primitives Before Rasterization
Scissor Test
Multisample Fragment Operations
Depth Bounds Test
Alpha Test
Stencil Test
Depth Buffer Test
Blending
Dithering
Logical Operation

Description

This module corresponds to section 4.1 (Per-Fragment Operations) of the OpenGL 2.1 specs.

Synopsis

rasterizerDiscard :: StateVar Capability
discardingRasterizer :: IO a -> IO a
scissor :: StateVar (Maybe (Position, Size))
sampleAlphaToCoverage :: StateVar Capability
sampleAlphaToOne :: StateVar Capability
sampleCoverage :: StateVar (Maybe (GLclampf, Bool))
depthBounds :: StateVar (Maybe (GLclampd, GLclampd))
data ComparisonFunction
- = Never
- | Less
- | Equal
- | Lequal
- | Greater
- | Notequal
- | Gequal
- | Always
alphaFunc :: StateVar (Maybe (ComparisonFunction, GLclampf))
stencilTest :: StateVar Capability
stencilFunc :: StateVar (ComparisonFunction, GLint, GLuint)
stencilFuncSeparate :: Face -> StateVar (ComparisonFunction, GLint, GLuint)
data StencilOp
- = OpZero
- | OpKeep
- | OpReplace
- | OpIncr
- | OpIncrWrap
- | OpDecr
- | OpDecrWrap
- | OpInvert
stencilOp :: StateVar (StencilOp, StencilOp, StencilOp)
stencilOpSeparate :: Face -> StateVar (StencilOp, StencilOp, StencilOp)
activeStencilFace :: StateVar (Maybe Face)
depthFunc :: StateVar (Maybe ComparisonFunction)
blend :: StateVar Capability
blendBuffer :: DrawBufferIndex -> StateVar Capability
data BlendEquation
- = FuncAdd
- | FuncSubtract
- | FuncReverseSubtract
- | Min
- | Max
- | LogicOp
blendEquation :: StateVar BlendEquation
blendEquationSeparate :: StateVar (BlendEquation, BlendEquation)
data BlendingFactor
- = Zero
- | One
- | SrcColor
- | OneMinusSrcColor
- | DstColor
- | OneMinusDstColor
- | SrcAlpha
- | OneMinusSrcAlpha
- | DstAlpha
- | OneMinusDstAlpha
- | ConstantColor
- | OneMinusConstantColor
- | ConstantAlpha
- | OneMinusConstantAlpha
- | SrcAlphaSaturate
blendFuncSeparate :: StateVar ((BlendingFactor, BlendingFactor), (BlendingFactor, BlendingFactor))
blendFunc :: StateVar (BlendingFactor, BlendingFactor)
blendColor :: StateVar (Color4 GLclampf)
dither :: StateVar Capability
data LogicOp
- = Clear
- | And
- | AndReverse
- | Copy
- | AndInverted
- | Noop
- | Xor
- | Or
- | Nor
- | Equiv
- | Invert
- | OrReverse
- | CopyInverted
- | OrInverted
- | Nand
- | Set
logicOp :: StateVar (Maybe LogicOp)

Discarding Primitives Before Rasterization

rasterizerDiscard :: StateVar Capability Source #

discardingRasterizer :: IO a -> IO a Source #

Scissor Test

scissor :: StateVar (Maybe (Position, Size)) Source #

Multisample Fragment Operations

sampleAlphaToCoverage :: StateVar Capability Source #

sampleAlphaToOne :: StateVar Capability Source #

sampleCoverage :: StateVar (Maybe (GLclampf, Bool)) Source #

Depth Bounds Test

depthBounds :: StateVar (Maybe (GLclampd, GLclampd)) Source #

Alpha Test

data ComparisonFunction Source #

Constructors

Never
Less
Equal
Lequal
Greater
Notequal
Gequal
Always

Instances

Eq ComparisonFunction Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.ComparisonFunction Methods (==) :: ComparisonFunction -> ComparisonFunction -> Bool # (/=) :: ComparisonFunction -> ComparisonFunction -> Bool #
Ord ComparisonFunction Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.ComparisonFunction Methods compare :: ComparisonFunction -> ComparisonFunction -> Ordering # (<) :: ComparisonFunction -> ComparisonFunction -> Bool # (<=) :: ComparisonFunction -> ComparisonFunction -> Bool # (>) :: ComparisonFunction -> ComparisonFunction -> Bool # (>=) :: ComparisonFunction -> ComparisonFunction -> Bool # max :: ComparisonFunction -> ComparisonFunction -> ComparisonFunction # min :: ComparisonFunction -> ComparisonFunction -> ComparisonFunction #
Show ComparisonFunction Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.ComparisonFunction Methods showsPrec :: Int -> ComparisonFunction -> ShowS # show :: ComparisonFunction -> String # showList :: [ComparisonFunction] -> ShowS #

alphaFunc :: StateVar (Maybe (ComparisonFunction, GLclampf)) Source #

Stencil Test

stencilTest :: StateVar Capability Source #

stencilFunc :: StateVar (ComparisonFunction, GLint, GLuint) Source #

stencilFuncSeparate :: Face -> StateVar (ComparisonFunction, GLint, GLuint) Source #

data StencilOp Source #

Constructors

OpZero
OpKeep
OpReplace
OpIncr
OpIncrWrap
OpDecr
OpDecrWrap
OpInvert

Instances

Eq StencilOp Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.PerFragment Methods (==) :: StencilOp -> StencilOp -> Bool # (/=) :: StencilOp -> StencilOp -> Bool #
Ord StencilOp Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.PerFragment Methods compare :: StencilOp -> StencilOp -> Ordering # (<) :: StencilOp -> StencilOp -> Bool # (<=) :: StencilOp -> StencilOp -> Bool # (>) :: StencilOp -> StencilOp -> Bool # (>=) :: StencilOp -> StencilOp -> Bool # max :: StencilOp -> StencilOp -> StencilOp # min :: StencilOp -> StencilOp -> StencilOp #
Show StencilOp Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.PerFragment Methods showsPrec :: Int -> StencilOp -> ShowS # show :: StencilOp -> String # showList :: [StencilOp] -> ShowS #

stencilOp :: StateVar (StencilOp, StencilOp, StencilOp) Source #

stencilOpSeparate :: Face -> StateVar (StencilOp, StencilOp, StencilOp) Source #

activeStencilFace :: StateVar (Maybe Face) Source #

Depth Buffer Test

depthFunc :: StateVar (Maybe ComparisonFunction) Source #

Blending

blend :: StateVar Capability Source #

blendBuffer :: DrawBufferIndex -> StateVar Capability Source #

enable or disable blending based on the buffer bound to the i'th drawBuffer that is the buffer fmap (!! i) (get drawBuffers)

data BlendEquation Source #

Constructors

FuncAdd
FuncSubtract
FuncReverseSubtract
Min
Max
LogicOp

Instances

Eq BlendEquation Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.PerFragment Methods (==) :: BlendEquation -> BlendEquation -> Bool # (/=) :: BlendEquation -> BlendEquation -> Bool #
Ord BlendEquation Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.PerFragment Methods compare :: BlendEquation -> BlendEquation -> Ordering # (<) :: BlendEquation -> BlendEquation -> Bool # (<=) :: BlendEquation -> BlendEquation -> Bool # (>) :: BlendEquation -> BlendEquation -> Bool # (>=) :: BlendEquation -> BlendEquation -> Bool # max :: BlendEquation -> BlendEquation -> BlendEquation # min :: BlendEquation -> BlendEquation -> BlendEquation #
Show BlendEquation Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.PerFragment Methods showsPrec :: Int -> BlendEquation -> ShowS # show :: BlendEquation -> String # showList :: [BlendEquation] -> ShowS #

blendEquation :: StateVar BlendEquation Source #

blendEquationSeparate :: StateVar (BlendEquation, BlendEquation) Source #

data BlendingFactor Source #

Constructors

Zero
One
SrcColor
OneMinusSrcColor
DstColor
OneMinusDstColor
SrcAlpha
OneMinusSrcAlpha
DstAlpha
OneMinusDstAlpha
ConstantColor
OneMinusConstantColor
ConstantAlpha
OneMinusConstantAlpha
SrcAlphaSaturate

Instances

Eq BlendingFactor Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.BlendingFactor Methods (==) :: BlendingFactor -> BlendingFactor -> Bool # (/=) :: BlendingFactor -> BlendingFactor -> Bool #
Ord BlendingFactor Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.BlendingFactor Methods compare :: BlendingFactor -> BlendingFactor -> Ordering # (<) :: BlendingFactor -> BlendingFactor -> Bool # (<=) :: BlendingFactor -> BlendingFactor -> Bool # (>) :: BlendingFactor -> BlendingFactor -> Bool # (>=) :: BlendingFactor -> BlendingFactor -> Bool # max :: BlendingFactor -> BlendingFactor -> BlendingFactor # min :: BlendingFactor -> BlendingFactor -> BlendingFactor #
Show BlendingFactor Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.BlendingFactor Methods showsPrec :: Int -> BlendingFactor -> ShowS # show :: BlendingFactor -> String # showList :: [BlendingFactor] -> ShowS #

blendFuncSeparate :: StateVar ((BlendingFactor, BlendingFactor), (BlendingFactor, BlendingFactor)) Source #

blendFunc :: StateVar (BlendingFactor, BlendingFactor) Source #

blendColor :: StateVar (Color4 GLclampf) Source #

Dithering

dither :: StateVar Capability Source #

Logical Operation

data LogicOp Source #

Constructors

Clear
And
AndReverse
Copy
AndInverted
Noop
Xor
Or
Nor
Equiv
Invert
OrReverse
CopyInverted
OrInverted
Nand
Set

Instances

Eq LogicOp Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.PerFragment Methods (==) :: LogicOp -> LogicOp -> Bool # (/=) :: LogicOp -> LogicOp -> Bool #
Ord LogicOp Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.PerFragment Methods compare :: LogicOp -> LogicOp -> Ordering # (<) :: LogicOp -> LogicOp -> Bool # (<=) :: LogicOp -> LogicOp -> Bool # (>) :: LogicOp -> LogicOp -> Bool # (>=) :: LogicOp -> LogicOp -> Bool # max :: LogicOp -> LogicOp -> LogicOp # min :: LogicOp -> LogicOp -> LogicOp #
Show LogicOp Source #
Instance details Defined in Graphics.Rendering.OpenGL.GL.PerFragment Methods showsPrec :: Int -> LogicOp -> ShowS # show :: LogicOp -> String # showList :: [LogicOp] -> ShowS #

logicOp :: StateVar (Maybe LogicOp) Source #