FSlateFontCache

Font caching implementation Caches characters into textures as needed

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Inheritance Hierarchy

ISlateAtlasProvider

FSlateFlushableAtlasCache

FSlateFontCache

References

Module	SlateCore
Header	/Engine/Source/Runtime/SlateCore/Public/Fonts/FontCache.h
Include	#include "Fonts/FontCache.h"

Syntax

class FSlateFontCache :
public ISlateAtlasProvider,
public FSlateFlushableAtlasCache

Remarks

Font caching implementation Caches characters into textures as needed

Constructors

	Name	Description
	FSlateFontCache ( TSharedRef< ISlateFontAtlasFactory ..., ESlateTextureAtlasThreadId InOwning... )	Constructor

Destructors

	Name	Description
	~FSlateFontCache()

Functions

	Name	Description
bool	CanLoadCodepoint ( const FFontData& InFontData, const UTF32CHAR InCodepoint, EFontFallback MaxFallbackLevel )	Whether or not the specified character, within the specified font, can be loaded with the specified maximum font fallback level
bool	ConditionalFlushCache()	Flush the cache if needed
void	FlushCompositeFont ( const FCompositeFont& InCompositeF... )	Flush the given composite font out of the cache
void	FlushData()	Clears just the cached font data, but leaves the atlases alone
void	FlushObject ( const UObject*const InObject )	Flush the given object out of the cache
TArray< FStr...	GetAvailableFontSubFaces ( FFontFaceDataConstRef InMemory )	Get the available sub-face data from the given font.
TArray< FStr...	GetAvailableFontSubFaces ( const FString& InFilename )	Get the available sub-face data from the given font.
int16	GetBaseline ( const FSlateFontInfo& InFontInfo, float FontScale )	Returns the baseline for the specified font.
FCharacterLi...	GetCharacterList ( const FSlateFontInfo& InFontInfo, float FontScale, const FFontOutlineSettings& InOutl... )	Gets information for how to draw all non-shaped characters in the specified string.
const FFontD...	GetDefaultFontData ( const FSlateFontInfo& InFontInfo )	Returns the font to use from the default typeface
const TSet< ...	GetFontAttributes ( const FFontData& InFontData )	Returns the font attributes for the specified font.
SIZE_T	GetFontDataAssetResidentMemory ( const UObject* FontDataAsset )	Gets the allocated font face data for a font data asset
const FFontD...	GetFontDataForCodepoint ( const FSlateFontInfo& InFontInfo, const UTF32CHAR InCodepoint, float& OutScalingFactor )	Returns the font to use from the typeface associated with the given codepoint
ISlateFontTe...	GetFontTexture ( uint32 Index )	Get the texture resource for a font atlas at a given index
int8	GetKerning ( const FFontData& InFontData, const int32 InSize, TCHAR First, TCHAR Second, float Scale )	Calculates the kerning amount for a pair of characters
uint16	GetMaxCharacterHeight ( const FSlateFontInfo& InFontInfo, float FontScale )	Returns the height of the largest character in the font.
FShapedGlyph...	GetOverflowEllipsisText ( const FSlateFontInfo& InFontInfo, const float InFontScale )	Gets the overflow glyph sequence for a given font.
FShapedGlyph...	GetShapedGlyphFontAtlasData ( const FShapedGlyphEntry& InShapedG..., const FFontOutlineSettings& InOutl... )	Get the atlas information for the given shaped glyph. This information will be cached if required
void	GetStrikeMetrics ( const FSlateFontInfo& InFontInfo, const float FontScale, int16& OutStrikeLinePos, int16& OutStrikeLineThickness )	Get the strike metrics for the specified font.
void	GetUnderlineMetrics ( const FSlateFontInfo& InFontInfo, const float FontScale, int16& OutUnderlinePos, int16& OutUnderlineThickness )	Get the underline metrics for the specified font.
bool	HasKerning ( const FFontData& InFontData )
FOnReleaseFo...	OnReleaseResources()	Event called after releasing the rendering resources in ReleaseResources
void	ReleaseResources()	Releases rendering resources
FShapedGlyph...	ShapeBidirectionalText ( const FString& InText, const FSlateFontInfo& InFontInfo, const float InFontScale, const TextBiDi::ETextDirection InBa..., const ETextShapingMethod InTextShap... )	Performs text shaping on the given string using the given font info.
FShapedGlyph...	ShapeBidirectionalText ( const TCHAR* InText, const int32 InTextStart, const int32 InTextLen, const FSlateFontInfo& InFontInfo, const float InFontScale, const TextBiDi::ETextDirection InBa..., const ETextShapingMethod InTextShap... )	Performs text shaping on the given string using the given font info.
FShapedGlyph...	ShapeUnidirectionalText ( const FString& InText, const FSlateFontInfo& InFontInfo, const float InFontScale, const TextBiDi::ETextDirection InTe..., const ETextShapingMethod InTextShap... )	Performs text shaping on the given range of the string using the given font info.
FShapedGlyph...	ShapeUnidirectionalText ( const TCHAR* InText, const int32 InTextStart, const int32 InTextLen, const FSlateFontInfo& InFontInfo, const float InFontScale, const TextBiDi::ETextDirection InTe..., const ETextShapingMethod InTextShap... )	Performs text shaping on the given range of the string using the given font info.
void	UpdateCache()	Updates the texture used for rendering

Overridden from ISlateAtlasProvider

	Name	Description
FSlateShader...	GetAtlasPageResource ( const int32 InIndex )	Get the page resource for the given index (verify with GetNumAtlasPages)
FAtlasSlotIn...	GetAtlasSlotInfoAtPosition ( FIntPoint InPosition, int32 AtlasIndex )	Finds a currently occupied slot at a position specified in atlas coordinates where 0,0 is the top left and the size of the atlas is bottom right
int32	GetNumAtlasPages()	ISlateAtlasProvider
bool	IsAtlasPageResourceAlphaOnly ( const int32 InIndex )	Does the page resources for the given index only contain alpha information? This affects how the atlas visualizer will sample them (verify with GetNumAtlasPages)

Overridden from FSlateFlushableAtlasCache

		Name	Description
	void	RequestFlushCache ( const FString& FlushReason )	Issues a request to clear all cached data from the cache