VulkanFramebuffer.h

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// Copyright Epic Games, Inc. All Rights Reserved..
 
#pragma once
 
#include "VulkanRHIPrivate.h"
 
class FVulkanFramebuffer
{
public:
    FVulkanFramebuffer(FVulkanDevice& Device, const FRHISetRenderTargetsInfo& InRTInfo, const FVulkanRenderTargetLayout& RTLayout, const FVulkanRenderPass& RenderPass);
    ~FVulkanFramebuffer();
 
    bool Matches(const FRHISetRenderTargetsInfo& RTInfo) const;
 
    uint32 GetNumColorAttachments() const
    {
        return NumColorAttachments;
    }
 
    void Destroy(FVulkanDevice& Device);
 
    VkFramebuffer GetHandle()
    {
        return Framebuffer;
    }
 
    const FVulkanView::FTextureView& GetPartialDepthTextureView() const
    {
        check(PartialDepthTextureView);
        return PartialDepthTextureView->GetTextureView();
    }
 
    TArray<FVulkanView const*> AttachmentTextureViews;
 
    // Copy from the Depth render target partial view
    FVulkanView const* PartialDepthTextureView = nullptr;
 
    bool ContainsRenderTarget(FRHITexture* Texture) const
    {
        ensure(Texture);
        FVulkanTexture* VulkanTexture = ResourceCast(Texture);
        return ContainsRenderTarget(VulkanTexture->Image);
    }
 
    bool ContainsRenderTarget(VkImage Image) const
    {
        ensure(Image != VK_NULL_HANDLE);
        for (uint32 Index = 0; Index < NumColorAttachments; ++Index)
        {
            if (ColorRenderTargetImages[Index] == Image)
            {
                return true;
            }
        }
 
        return (DepthStencilRenderTargetImage == Image);
    }
 
    VkRect2D GetRenderArea() const
    {
        return RenderArea;
    }
 
    // Expose the view creation logic so it can be reused for dynamic rendering
    static FVulkanView* GetColorRenderTargetViewDesc(FVulkanTexture* Texture, uint32 MipIndex, int32 ArraySliceIndex, uint32 MultiViewCount, uint32& InOutNumLayers);
    static FVulkanView* GetColorResolveTargetViewDesc(FVulkanTexture* ResolveTexture, uint32 MipIndex, int32 ArraySliceIndex);
    static FVulkanView* GetDepthStencilTargetViewDesc(FVulkanTexture* Texture, uint32 NumColorAttachments, uint32 MipIndex, uint32& InOutNumLayers);
    static FVulkanView* GetDepthStencilResolveTargetViewDesc(FVulkanTexture* ResolveTexture, uint32 MipIndex);
    static FVulkanView* GetFragmentDensityAttachmentViewDesc(FVulkanTexture* Texture, uint32 MipIndex);
 
private:
    VkFramebuffer Framebuffer;
    VkRect2D RenderArea;
 
    // Unadjusted number of color render targets as in FRHISetRenderTargetsInfo 
    uint32 NumColorRenderTargets;
 
    // Save image off for comparison, in case it gets aliased.
    uint32 NumColorAttachments;
    VkImage ColorRenderTargetImages[MaxSimultaneousRenderTargets];
    VkImage ColorResolveTargetImages[MaxSimultaneousRenderTargets];
    VkImage DepthStencilRenderTargetImage;
    VkImage DepthStencilResolveRenderTargetImage;
    VkImage FragmentDensityImage;
 
    // Predefined set of barriers, when executes ensuring all writes are finished
    TArray<VkImageMemoryBarrier> WriteBarriers;
 
    friend class FVulkanCommandListContext;
};