121 lines
3.9 KiB
C++
121 lines
3.9 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "Textures/TextureAtlas.h"
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#include "Rendering/ShaderResourceManager.h"
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#include "SlateD3DTextures.h"
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class FSlateVectorGraphicsCache;
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class ISlateStyle;
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/**
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* Stores a mapping of texture names to their loaded d3d resource. Resources are loaded from disk and created on demand when needed
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*/
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class FSlateD3DTextureManager : public ISlateAtlasProvider, public FSlateShaderResourceManager
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{
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public:
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FSlateD3DTextureManager();
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virtual ~FSlateD3DTextureManager();
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/** ISlateAtlasProvider */
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virtual int32 GetNumAtlasPages() const override;
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virtual FSlateShaderResource* GetAtlasPageResource(const int32 InIndex) const override;
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virtual bool IsAtlasPageResourceAlphaOnly(const int32 InIndex) const override;
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#if WITH_ATLAS_DEBUGGING
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virtual FAtlasSlotInfo GetAtlasSlotInfoAtPosition(FIntPoint InPosition, int32 AtlasIndex) const override;
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#endif
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/**
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* Loads and creates rendering resources for all used textures.
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* In this implementation all textures must be known at startup time or they will not be found
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*/
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void LoadUsedTextures();
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void LoadStyleResources( const ISlateStyle& Style );
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/**
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* Returns a texture with the passed in name or NULL if it cannot be found.
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*/
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virtual FSlateShaderResourceProxy* GetShaderResource(const FSlateBrush& Brush, FVector2f LocalSize, float DrawScale) override;
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virtual ISlateAtlasProvider* GetTextureAtlasProvider() override;
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/**
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* Creates a 1x1 texture of the specified color
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*
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* @param TextureName The name of the texture
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* @param InColor The color for the texture
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*/
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virtual FSlateShaderResourceProxy* CreateColorTexture( const FName TextureName, FColor InColor );
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FSlateShaderResourceProxy* CreateDynamicTextureResource(FName ResourceName, uint32 Width, uint32 Height, const TArray< uint8 >& RawData);
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/**
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* Releases a dynamic texture resource
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*
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* @param InBrush The brush to with texture to release
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*/
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void ReleaseDynamicTextureResource( const FSlateBrush& InBrush );
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void UpdateCache();
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void ConditionalFlushCache();
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private:
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/**
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* Gets a dynamic texture resource
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*
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* @param InBrush The brush to with texture to get
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*/
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FSlateShaderResourceProxy* GetDynamicTextureResource( const FSlateBrush& InBrush );
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/**
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* Gets a vector graphics resource (may generate it internally)
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*
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* @param InBrush The brush to with texture to get
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* @param LocalSize The unscaled local size of the final image
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* @param DrawScale Any scaling applied to the final image
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*/
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FSlateShaderResourceProxy* GetVectorResource(const FSlateBrush& Brush, FVector2f LocalSize, float DrawScale);
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/**
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* Creates textures from files on disk and atlases them if possible
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*
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* @param Resources The brush resources to load images for
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*/
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void CreateTextures( const TArray< const FSlateBrush* >& Resources );
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bool LoadTexture( const FSlateBrush& InBrush, uint32& OutWidth, uint32& OutHeight, TArray<uint8>& OutDecodedImage );
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/**
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* Generates rendering resources for a texture
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*
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* @param Info Information on how to generate the texture resource
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*/
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FSlateShaderResourceProxy* GenerateTextureResource( const FNewTextureInfo& Info, FName TextureName );
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private:
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/** Represents a dynamic resource for rendering */
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struct FDynamicTextureResource
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{
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FSlateShaderResourceProxy* Proxy;
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FSlateD3DTexture* D3DTexture;
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FDynamicTextureResource( FSlateD3DTexture* ExistingTexture );
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~FDynamicTextureResource();
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};
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/** Map of all active dynamic texture objects being used for brush resources */
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TMap<FName, TSharedPtr<FDynamicTextureResource> > DynamicTextureMap;
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/** Static texture atlases */
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TArray<TUniquePtr<FSlateTextureAtlasD3D>> PrecachedTextureAtlases;
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/** Static non atlased textures */
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TArray<TUniquePtr<FSlateD3DTexture>> NonAtlasedTextures;
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/** Cache for vector graphic atlases */
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TUniquePtr<FSlateVectorGraphicsCache> VectorGraphicsCache;
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};
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