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#rb Rob.Srinivasiah #review @Jules.Blok, @Rob.Srinivasiah #jira UE-162054 #preflight 63d979a7cf52968117d174c4 [CL 23944314 by Arciel Rekman in ue5-main branch]
75 lines
3.0 KiB
C++
75 lines
3.0 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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DummyRenderResources.cpp: Implementations of frequently used render resources.
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=============================================================================*/
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#include "CommonRenderResources.h"
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#include "Containers/DynamicRHIResourceArray.h"
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#include "StereoRenderUtils.h"
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TGlobalResource<FFilterVertexDeclaration> GFilterVertexDeclaration;
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TGlobalResource<FEmptyVertexDeclaration> GEmptyVertexDeclaration;
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TGlobalResource<FScreenRectangleVertexBuffer> GScreenRectangleVertexBuffer;
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TGlobalResource<FScreenRectangleIndexBuffer> GScreenRectangleIndexBuffer;
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IMPLEMENT_GLOBAL_SHADER(FScreenVertexShaderVS, "/Engine/Private/Tools/FullscreenVertexShader.usf", "MainVS", SF_Vertex);
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IMPLEMENT_GLOBAL_SHADER(FInstancedScreenVertexShaderVS, "/Engine/Private/Tools/FullscreenVertexShader.usf", "MainVS", SF_Vertex);
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IMPLEMENT_GLOBAL_SHADER(FCopyRectPS, "/Engine/Private/ScreenPass.usf", "CopyRectPS", SF_Pixel);
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bool FInstancedScreenVertexShaderVS::ShouldCompilePermutation(const FGlobalShaderPermutationParameters& Parameters)
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{
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UE::StereoRenderUtils::FStereoShaderAspects Aspects(Parameters.Platform);
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return Aspects.IsInstancedMultiViewportEnabled();
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}
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void FScreenRectangleVertexBuffer::InitRHI()
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{
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TResourceArray<FFilterVertex, VERTEXBUFFER_ALIGNMENT> Vertices;
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Vertices.SetNumUninitialized(6);
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Vertices[0].Position = FVector4f(1, 1, 0, 1);
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Vertices[0].UV = FVector2f(1, 1);
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Vertices[1].Position = FVector4f(0, 1, 0, 1);
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Vertices[1].UV = FVector2f(0, 1);
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Vertices[2].Position = FVector4f(1, 0, 0, 1);
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Vertices[2].UV = FVector2f(1, 0);
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Vertices[3].Position = FVector4f(0, 0, 0, 1);
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Vertices[3].UV = FVector2f(0, 0);
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//The final two vertices are used for the triangle optimization (a single triangle spans the entire viewport )
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Vertices[4].Position = FVector4f(-1, 1, 0, 1);
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Vertices[4].UV = FVector2f(-1, 1);
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Vertices[5].Position = FVector4f(1, -1, 0, 1);
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Vertices[5].UV = FVector2f(1, -1);
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// Create vertex buffer. Fill buffer with initial data upon creation
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FRHIResourceCreateInfo CreateInfo(TEXT("FScreenRectangleVertexBuffer"), &Vertices);
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VertexBufferRHI = RHICreateVertexBuffer(Vertices.GetResourceDataSize(), BUF_Static, CreateInfo);
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}
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void FScreenRectangleIndexBuffer::InitRHI()
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{
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const uint16 Indices[] =
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{
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0, 1, 2, 2, 1, 3, // [0 .. 5] Full screen quad with 2 triangles
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0, 4, 5, // [6 .. 8] Full screen triangle
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3, 2, 1 // [9 .. 11] Full screen rect defined with TL, TR, BL corners
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};
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TResourceArray<uint16, INDEXBUFFER_ALIGNMENT> IndexBuffer;
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uint32 NumIndices = UE_ARRAY_COUNT(Indices);
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IndexBuffer.AddUninitialized(NumIndices);
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FMemory::Memcpy(IndexBuffer.GetData(), Indices, NumIndices * sizeof(uint16));
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// Create index buffer. Fill buffer with initial data upon creation
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FRHIResourceCreateInfo CreateInfo(TEXT("FScreenRectangleIndexBuffer"), &IndexBuffer);
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IndexBufferRHI = RHICreateIndexBuffer(sizeof(uint16), IndexBuffer.GetResourceDataSize(), BUF_Static, CreateInfo);
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}
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