CAST II Game Engine
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Class TAPIStateWrapper

Unit

C2Render

Declaration

type TAPIStateWrapper = class

Description

API-dependent class which wraps render state

Fields

 NameDescription
ProtectedCameraCurrent camera (same as Renderer.LastAppliedCamera)
ProtectedClipPlanesStateClip planes state
ProtectedFPerfProfilePerformance profile
PublicFPixelShadersToFix: make it protected
ProtectedFRenderTargetsRender targets
PublicFVertexShadersToFix: make it protected
ProtectedLastErrorLast renderer error. Used for pass validation.
PublicPixelShaderFlagPixel shader usage flag. Used internally.
ProtectedRendererReference to renderer
ProtectedStageMatrixSetTrue if texture matrix was set for a certain stage
PublicVertexShaderFlagVertex shader usage flag. Used internally.

Methods

Overview

Publicconstructor Create;
Publicdestructor Destroy; override;
Protectedfunction APICreateRenderTarget(Index, Width, Height: Integer; AColorFormat, ADepthFormat: Cardinal): Boolean; virtual; abstract;
Protectedprocedure APISetShaderConstant(const Constant: TShaderConstant); overload; virtual; abstract;
Protectedprocedure APISetShaderConstant(ShaderKind: TShaderKind; ShaderRegister: Integer; const Vector: TShaderRegisterType); overload; virtual; abstract;
Protectedfunction APIValidatePass(const Pass: TRenderPass; out ResultStr: string): Boolean; virtual; abstract;
Protectedprocedure ApplyClipPlanes;
Publicprocedure ApplyCustomTextureMatrices(const Pass: TRenderPass; Item: TVisible); virtual; abstract;
Publicprocedure ApplyPass(const Pass: TRenderPass); virtual; abstract;
Protectedprocedure ApplyTextureMatrices(const Pass: TRenderPass); virtual; abstract;
Protectedfunction CreatePixelShader(Item: TShaderResource): Integer; virtual;
Protectedfunction CreateRenderTarget(Index, Width, Height: Integer; AColorFormat, ADepthFormat: Cardinal; ADepthTexture: Boolean): Boolean;
Protectedfunction CreateVertexShader(Item: TShaderResource; Declaration: TVertexDeclaration): Integer; virtual;
Protectedprocedure DestroyRenderTarget(Index: Integer); virtual; abstract;
Publicfunction FindRenderTarget(const ACamera: TCamera): Integer;
Protectedprocedure HandleDataChange(Data: Pointer); virtual;
Protectedprocedure HandleItemReplace(OldItem, NewItem: TItem); virtual;
Publicprocedure HandleMessage(const Msg: TMessage);
Protectedfunction IsRenderTargetEmpty(const Element: TRenderTarget): Boolean;
Publicfunction IsRenderTargetUptoDate(const ACamera: TCamera): Boolean;
Protectedfunction IsShaderEmpty(const Element: TShader): Boolean;
Protectedfunction ResolvePixelShader(Pass: TRenderPass): Boolean;
Publicfunction ResolveVertexShader(Pass: TRenderPass): Boolean;
Publicprocedure SetBlending(Enabled: Boolean; SrcBlend, DestBlend, AlphaRef, ATestFunc, Operation: Integer); virtual; abstract;
Publicprocedure SetClipPlane(Index: Cardinal; Plane: PPlane); virtual; abstract;
Publicprocedure SetCullAndFillMode(FillMode, ShadeMode, CullMode: Integer; ColorMask: Cardinal); virtual; abstract;
Publicprocedure SetEdgePoint(PointSprite, PointScale, EdgeAntialias: Boolean); virtual; abstract;
Publicprocedure SetFog(Kind: Cardinal; Color: BaseTypes.TColor; AFogStart, AFogEnd, ADensity: Single); virtual; abstract;
Publicprocedure SetLighting(Enable: Boolean; AAmbient: BaseTypes.TColor; SpecularMode: Integer; NormalizeNormals: Boolean); virtual; abstract;
Publicprocedure SetLinePattern(ALinePattern: Longword); virtual; abstract;
Publicprocedure SetMaterial(const AAmbient, ADiffuse, ASpecular, AEmissive: BaseTypes.TColor4S; APower: Single); virtual; abstract;
Publicprocedure SetPointValues(APointSize, AMinPointSize, AMaxPointSize, APointScaleA, APointScaleB, APointScaleC: Single); virtual; abstract;
Protectedfunction SetRenderTarget(const ACamera: TCamera; TextureTarget: Boolean): Boolean; virtual; abstract;
Publicprocedure SetShaderConstant(ShaderKind: TShaderKind; ShaderRegister: Integer; const Vector: TShaderRegisterType); overload;
Publicprocedure SetShaderConstant(const Constant: TShaderConstant); overload;
Publicprocedure SetStencilState(SFailOp, ZFailOp, PassOp, STestFunc: Integer); virtual; abstract;
Publicprocedure SetStencilValues(SRef, SMask, SWriteMask: Integer); virtual; abstract;
Publicprocedure SetTextureFactor(ATextureFactor: BaseTypes.TColor); virtual; abstract;
Publicprocedure SetTextureWrap(const CoordSet: TTWrapCoordSet); virtual; abstract;
Publicprocedure SetZBuffer(ZTestFunc, ZBias: Integer; ZWrite: Boolean); virtual; abstract;
Publicfunction ValidatePass(const Pass: TRenderPass): Boolean;

Description

Publicconstructor Create;

 

Publicdestructor Destroy; override;

 

Protectedfunction APICreateRenderTarget(Index, Width, Height: Integer; AColorFormat, ADepthFormat: Cardinal): Boolean; virtual; abstract;

Calls an API to create a render target with given parameters. DepthStencil surface will be created if ADepthFormat is other than pfUndefined. Returns True if success.

Protectedprocedure APISetShaderConstant(const Constant: TShaderConstant); overload; virtual; abstract;

Calls an API to set a shader constant

Protectedprocedure APISetShaderConstant(ShaderKind: TShaderKind; ShaderRegister: Integer; const Vector: TShaderRegisterType); overload; virtual; abstract;

Calls an API to set a shader constant. ShaderKind - kind of shader, ShaderRegister - index of 4-component vector register to set, Vector - new value of the register.

Protectedfunction APIValidatePass(const Pass: TRenderPass; out ResultStr: string): Boolean; virtual; abstract;

Calls an API to validate the specified pass. Returns True if the pass is can be handled by current hardware. Otherwise returns False and fills ResultStr a text representation of the error occured.

Protectedprocedure ApplyClipPlanes;

Applies current clipping planes

Publicprocedure ApplyCustomTextureMatrices(const Pass: TRenderPass; Item: TVisible); virtual; abstract;

Applies item-specific custom texture matrix of each texture stage of the specified render pass

Publicprocedure ApplyPass(const Pass: TRenderPass); virtual; abstract;

Applies the specified render pass

Protectedprocedure ApplyTextureMatrices(const Pass: TRenderPass); virtual; abstract;

Applies texture matrix of each texture stage of the specified render pass

Protectedfunction CreatePixelShader(Item: TShaderResource): Integer; virtual;

Creates a pixel shader from the resource

Protectedfunction CreateRenderTarget(Index, Width, Height: Integer; AColorFormat, ADepthFormat: Cardinal; ADepthTexture: Boolean): Boolean;

Ensures that all parameters are correct and supported and calls APICreateRenderTarget. Returns True if a render target been created.

Protectedfunction CreateVertexShader(Item: TShaderResource; Declaration: TVertexDeclaration): Integer; virtual;

Creates a vertex shader from the resource with the given vertex declaration

Protectedprocedure DestroyRenderTarget(Index: Integer); virtual; abstract;

Destroys the specified by index render target

Publicfunction FindRenderTarget(const ACamera: TCamera): Integer;

Return a render target for the given camera. If render target does not exists the function creates it.

Protectedprocedure HandleDataChange(Data: Pointer); virtual;

Handle data change of renderer-related items

Protectedprocedure HandleItemReplace(OldItem, NewItem: TItem); virtual;

Handle removal or replace of some item from scene

Publicprocedure HandleMessage(const Msg: TMessage);

Handles some related messages

Protectedfunction IsRenderTargetEmpty(const Element: TRenderTarget): Boolean;

Returns True if the specified render target is not initialized

Publicfunction IsRenderTargetUptoDate(const ACamera: TCamera): Boolean;

Returns True if there is no need to update render target texture associated with Camera

Protectedfunction IsShaderEmpty(const Element: TShader): Boolean;

Returns True if the specified shader is not initialized

Protectedfunction ResolvePixelShader(Pass: TRenderPass): Boolean;

Resolves a pixel shader for the given pass. Used internally.

Publicfunction ResolveVertexShader(Pass: TRenderPass): Boolean;

Resolves a vertex shader for the given pass. Used internally.

Publicprocedure SetBlending(Enabled: Boolean; SrcBlend, DestBlend, AlphaRef, ATestFunc, Operation: Integer); virtual; abstract;

Sets alpha blending mode and alpha test settings

Publicprocedure SetClipPlane(Index: Cardinal; Plane: PPlane); virtual; abstract;

Applies a clipping plane

Publicprocedure SetCullAndFillMode(FillMode, ShadeMode, CullMode: Integer; ColorMask: Cardinal); virtual; abstract;

Sets culling, shading and filling modes as well as color write mask

Publicprocedure SetEdgePoint(PointSprite, PointScale, EdgeAntialias: Boolean); virtual; abstract;

Sets edge and points settings

Publicprocedure SetFog(Kind: Cardinal; Color: BaseTypes.TColor; AFogStart, AFogEnd, ADensity: Single); virtual; abstract;

Sets fog kind, color, start/end and density

Publicprocedure SetLighting(Enable: Boolean; AAmbient: BaseTypes.TColor; SpecularMode: Integer; NormalizeNormals: Boolean); virtual; abstract;

Set lighting settings

Publicprocedure SetLinePattern(ALinePattern: Longword); virtual; abstract;

Sets line pattern

Publicprocedure SetMaterial(const AAmbient, ADiffuse, ASpecular, AEmissive: BaseTypes.TColor4S; APower: Single); virtual; abstract;

Sets API-level material (ambient, diffuse, specular and emissive colors and specular power)

Publicprocedure SetPointValues(APointSize, AMinPointSize, AMaxPointSize, APointScaleA, APointScaleB, APointScaleC: Single); virtual; abstract;

Sets points size parameters

Protectedfunction SetRenderTarget(const ACamera: TCamera; TextureTarget: Boolean): Boolean; virtual; abstract;

Sets current render target to the one associated with Camera. Returns True if actual change was made.

Publicprocedure SetShaderConstant(ShaderKind: TShaderKind; ShaderRegister: Integer; const Vector: TShaderRegisterType); overload;

Sets a shader constant. ShaderKind - kind of shader, ShaderRegister - index of 4-component vector register to set, Vector - new value of the register.

Publicprocedure SetShaderConstant(const Constant: TShaderConstant); overload;

Sets a shader constant

Publicprocedure SetStencilState(SFailOp, ZFailOp, PassOp, STestFunc: Integer); virtual; abstract;

Sets stencil state

Publicprocedure SetStencilValues(SRef, SMask, SWriteMask: Integer); virtual; abstract;

Sets stencil reference value and masks

Publicprocedure SetTextureFactor(ATextureFactor: BaseTypes.TColor); virtual; abstract;

Sets texture factor color

Publicprocedure SetTextureWrap(const CoordSet: TTWrapCoordSet); virtual; abstract;

Sets texture wrapping mode

Publicprocedure SetZBuffer(ZTestFunc, ZBias: Integer; ZWrite: Boolean); virtual; abstract;

Sets Z-buffer related values

Publicfunction ValidatePass(const Pass: TRenderPass): Boolean;

Validate the specified pass. Returns True if the pass is valid

Last modified: Jan 6, 2010
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