CanvasBatchedElementRenderItem.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    Canvas.h: Unreal canvas definition.
=============================================================================*/
 
#pragma once
 
#include "CanvasTypes.h"
#include "BatchedElements.h"
 
class FCanvasBatchedElementRenderItem : public FCanvasBaseRenderItem
{
public:
    FCanvasBatchedElementRenderItem(
        FBatchedElementParameters* InBatchedElementParameters=NULL,
        const FTexture* InTexture=NULL,
        ESimpleElementBlendMode InBlendMode=SE_BLEND_MAX,
        FCanvas::EElementType InElementType=FCanvas::ET_MAX,
        const FCanvas::FTransformEntry& InTransform=FCanvas::FTransformEntry(FMatrix::Identity),
        const FDepthFieldGlowInfo& InGlowInfo=FDepthFieldGlowInfo() )
        // this data is deleted after rendering has completed
        : Data(new FRenderData(InBatchedElementParameters, InTexture, InBlendMode, InElementType, InTransform, InGlowInfo))
    {}
 
    virtual ~FCanvasBatchedElementRenderItem()
    {
        delete Data;
    }
 
    virtual class FCanvasBatchedElementRenderItem* GetCanvasBatchedElementRenderItem() override
    { 
        return this; 
    }
 
    virtual bool Render_RenderThread(FCanvasRenderContext& RenderContext, FMeshPassProcessorRenderState& DrawRenderState, const FCanvas* Canvas) override;
    
    virtual bool Render_GameThread(const FCanvas* Canvas, FCanvasRenderThreadScope& RenderScope) override;
 
    bool IsMatch(FBatchedElementParameters* BatchedElementParameters, const FTexture* InTexture, ESimpleElementBlendMode InBlendMode, FCanvas::EElementType InElementType, const FCanvas::FTransformEntry& InTransform, const FDepthFieldGlowInfo& InGlowInfo)
    {
        return( Data->BatchedElementParameters.GetReference() == BatchedElementParameters &&
                Data->Texture == InTexture &&
                Data->BlendMode == InBlendMode &&
                Data->ElementType == InElementType &&
                Data->Transform.GetMatrixCRC() == InTransform.GetMatrixCRC() &&
                Data->GlowInfo == InGlowInfo );
    }
 
    inline FBatchedElements* GetBatchedElements()
    {
        return &Data->BatchedElements;
    }
 
private:
    class FRenderData
    {
    public:
        FRenderData(
            FBatchedElementParameters* InBatchedElementParameters=NULL,
            const FTexture* InTexture=NULL,
            ESimpleElementBlendMode InBlendMode=SE_BLEND_MAX,
            FCanvas::EElementType InElementType=FCanvas::ET_MAX,
            const FCanvas::FTransformEntry& InTransform=FCanvas::FTransformEntry(FMatrix::Identity),
            const FDepthFieldGlowInfo& InGlowInfo=FDepthFieldGlowInfo() )
            :   BatchedElementParameters(InBatchedElementParameters)
            ,   Texture(InTexture)
            ,   BlendMode(InBlendMode)
            ,   ElementType(InElementType)
            ,   Transform(InTransform)
            ,   GlowInfo(InGlowInfo)
        {}
        FBatchedElements BatchedElements;
        TRefCountPtr<FBatchedElementParameters> BatchedElementParameters;
        const FTexture* Texture;
        ESimpleElementBlendMode BlendMode;
        FCanvas::EElementType ElementType;
        FCanvas::FTransformEntry Transform;
        FDepthFieldGlowInfo GlowInfo;
    };
    
    FRenderData* Data;      
};