88 lines
2.5 KiB
Ucode
88 lines
2.5 KiB
Ucode
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/**
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* Copyright 1998-2013 Epic Games, Inc. All Rights Reserved.
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*/
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class Texture2DComposite extends Texture
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native(Texture)
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hidecategories(Object);
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/**
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* Defines a source texture and UV region in that texture
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*/
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struct native SourceTexture2DRegion
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{
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var int OffsetX;
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var int OffsetY;
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var int SizeX;
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var int SizeY;
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var int DestOffsetX;
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var int DestOffsetY;
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var Texture2D Texture2D;
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};
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/** list of source textures and UV regions for compositing */
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var array<SourceTexture2DRegion> SourceRegions;
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/**
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* Optional max texture size clamp for the composite texture. A value of 0 is ignored and
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* defaults to deriving the texture size using texture LOD bias settings from the source textures
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*/
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var int MaxTextureSize;
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/**
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* Dimensions of the composite texture. A value of 0 is ignored and defaults to deriving the
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* texture size using the size of the source textures
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*/
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var int DestSizeX;
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var int DestSizeY;
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/** Utility that checks to see if all Texture2Ds specified in the SourceRegions array are fully streamed in. */
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native final function bool SourceTexturesFullyStreamedIn();
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/**
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* Regenerates this composite texture using the list of source texture regions.
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* The existing mips are reallocated and the RHI resource for the texture is updated
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*
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* @param NumMipsToGenerate - number of mips to generate. if 0 then all mips are created
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*/
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native final function UpdateCompositeTexture(int NumMipsToGenerate);
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/** Utils to reset all source region info. */
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native final function ResetSourceRegions();
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cpptext
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{
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private:
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/**
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* Calculate the first available mip from a set of textures based on the LOD bias for each
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* texture.
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*
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* @return first available mip index from the source regions
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*/
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INT GetFirstAvailableMipIndex(const TArray<FSourceTexture2DRegion>& ValidRegions);
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/**
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* Locks each region of the source RHI texture 2d resources and copies the block of data
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* for that region to the destination mip buffer. This is done for all mip levels.
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*
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* (Only called by the rendering thread)
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*/
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void RenderThread_CopyRectRegions(const TArray<FSourceTexture2DRegion>& ValidRegions);
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// UTexture interface.
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virtual FTextureResource* CreateResource();
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virtual EMaterialValueType GetMaterialType() { return MCT_Texture2D; }
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// USurface interface.
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virtual FLOAT GetSurfaceWidth() const;
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virtual FLOAT GetSurfaceHeight() const;
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// UObject interface.
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virtual void Serialize(FArchive& Ar);
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}
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defaultproperties
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{
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// all mip levels will be resident in memory
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NeverStream=True
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}
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