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

Graphics.Rendering.OpenGL.GL.PerFragment Portability portable Stability stable Maintainer sven.panne@aedion.de

Contents Scissor Test Multisample Fragment Operations Depth Bounds Test Alpha Test Stencil Test Depth Buffer Test Occlusion Queries Blending Dithering Logical Operation

Description

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

Synopsis

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 -> SettableStateVar (ComparisonFunction, GLint, GLuint) data StencilOp = OpZero | OpKeep | OpReplace | OpIncr | OpIncrWrap | OpDecr | OpDecrWrap | OpInvert stencilOp :: StateVar (StencilOp, StencilOp, StencilOp) stencilOpSeparate :: Face -> SettableStateVar (StencilOp, StencilOp, StencilOp) activeStencilFace :: StateVar (Maybe Face) depthFunc :: StateVar (Maybe ComparisonFunction) newtype QueryObject = QueryObject GLuint data QueryTarget = SamplesPassed withQuery :: QueryTarget -> QueryObject -> IO a -> IO a queryCounterBits :: QueryTarget -> GettableStateVar GLsizei currentQuery :: QueryTarget -> GettableStateVar (Maybe QueryObject) queryResult :: QueryObject -> GettableStateVar GLuint queryResultAvailable :: QueryObject -> GettableStateVar Bool blend :: 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)

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 Ord ComparisonFunction Show ComparisonFunction

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

Stencil Test

stencilTest :: StateVar Capability Source

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

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

data StencilOp Source

Constructors OpZero OpKeep OpReplace OpIncr OpIncrWrap OpDecr OpDecrWrap OpInvert Instances Eq StencilOp Ord StencilOp Show StencilOp

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

stencilOpSeparate :: Face -> SettableStateVar (StencilOp, StencilOp, StencilOp) Source

activeStencilFace :: StateVar (Maybe Face) Source

Depth Buffer Test

depthFunc :: StateVar (Maybe ComparisonFunction) Source

Occlusion Queries

newtype QueryObject Source

Constructors QueryObject GLuint Instances Eq QueryObject ObjectName QueryObject Ord QueryObject Show QueryObject

data QueryTarget Source

Constructors SamplesPassed Instances Eq QueryTarget Ord QueryTarget Show QueryTarget

withQuery :: QueryTarget -> QueryObject -> IO a -> IO a Source

queryCounterBits :: QueryTarget -> GettableStateVar GLsizei Source

currentQuery :: QueryTarget -> GettableStateVar (Maybe QueryObject) Source

queryResult :: QueryObject -> GettableStateVar GLuint Source

queryResultAvailable :: QueryObject -> GettableStateVar Bool Source

Blending

blend :: StateVar Capability Source

data BlendEquation Source

Constructors FuncAdd FuncSubtract FuncReverseSubtract Min Max LogicOp Instances Eq BlendEquation Ord BlendEquation Show BlendEquation

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 Ord BlendingFactor Show BlendingFactor

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 Ord LogicOp Show LogicOp

logicOp :: StateVar (Maybe LogicOp) Source

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