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  3. FAlphaBitmap

FAlphaBitmap

API > API/Plugins > API/Plugins/Paper2D

   
Name FAlphaBitmap
Type struct
Header File /Engine/Plugins/2D/Paper2D/Source/Paper2D/Public/AlphaBitmap.h
Include Path #include "AlphaBitmap.h"

Syntax

struct FAlphaBitmap

Constructors

Name Remarks Include Path Unreal Specifiers

FAlphaBitmap ( UTexture* SourceTexture,
uint8 InDefaultValue
)

   AlphaBitmap.h  

FAlphaBitmap ( int InWidth,
int InHeight,
int InDefaultValue
)

 Create an empty bitmap. AlphaBitmap.h  

Variables

Public

Name Type Remarks Include Path Unreal Specifiers
DefaultValue uint8   AlphaBitmap.h  
Height int32   AlphaBitmap.h  
RawData TArray< uint8 >   AlphaBitmap.h  
Width int32   AlphaBitmap.h  

Functions

Public

Name Remarks Include Path Unreal Specifiers

void AnalyzeImage ( int32 StartX,
int32 StartY,
int32 InWidth,
int32 InHeight,
bool& bOutHasZeros,
bool& bOutHasIntermediateValues
) const

 Checks the image to determine if it is suitable for opaque, masked or translucent rendering. AlphaBitmap.h  

void ClearToDefaultValue()

   AlphaBitmap.h  

void DrawRectOutline ( int StartX,
int StartY,
int InWidth,
int InHeight
)

 Sets pixels to 1 marking the rectangle outline. AlphaBitmap.h  

void ExtractFromTexture ( UTexture* SourceTexture
)

   AlphaBitmap.h  

void FillRect ( int StartX,
int StartY,
int InWidth,
int InHeight
)

   AlphaBitmap.h  

bool FoundClosestValidPoint ( int StartX,
int StartY,
const int MaxAllowedSearchDistance,
FIntPoint& OutHitPoint
) const

 Wind through the bitmap from StartX, StartY to find the closest hit point. AlphaBitmap.h  

uint8 GetPixel ( int X,
int Y
) const

   AlphaBitmap.h  

void GetTightBounds ( FIntPoint& OutOrigin,
FIntPoint& OutDimension
) const

 Returns the tight bounding box around pixels that are not 0. AlphaBitmap.h  

bool IsColumnEmpty ( int X,
int Y0,
int Y1
) const

   AlphaBitmap.h  

bool IsColumnEqual ( int X,
int Y0,
int Y1,
int Target
) const

   AlphaBitmap.h  

bool IsRegionEmpty ( int32 X0,
int32 Y0,
int32 X1,
int32 Y1
)

 Is the rectangle empty (X0..X1, Y0..Y1 inclusive) AlphaBitmap.h  

bool IsRegionEqual ( int32 X0,
int32 Y0,
int32 X1,
int32 Y1,
int32 Target
) const

 Is the rectangle empty (X0..X1, Y0..Y1 inclusive) AlphaBitmap.h  

bool IsRowEmpty ( int X0,
int X1,
int Y
) const

   AlphaBitmap.h  

bool IsRowEqual ( int X0,
int X1,
int Y,
int Target
) const

   AlphaBitmap.h  

bool IsValid()

   AlphaBitmap.h  

void SetPixel ( int X,
int Y,
uint8 Value
)

   AlphaBitmap.h  

void ThresholdImage ( int32 AlphaThreshold
)

   AlphaBitmap.h  

void ThresholdImageBothWays ( int32 LowAlphaThreshold,
int32 HighAlphaThreshold
)

 Flushes values smaller or equal to LowAlphaThreshold to 0, and values greater or equal to HighAlphaThreshold to 255. AlphaBitmap.h  

void TightenBounds ( FIntPoint& InOutOrigin,
FIntPoint& InOutDimension
) const

 Returns the tight bounding box around pixels that are not 0. AlphaBitmap.h  

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