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  3. PAPER2FAlphaBitmap

PAPER2FAlphaBitmap

API > API/Plugins > API/Plugins/Paper2D

References

   
Module Paper2D
Header /Engine/Plugins/2D/Paper2D/Source/Paper2D/Public/AlphaBitmap.h
Include #include "AlphaBitmap.h"

Syntax

struct PAPER2FAlphaBitmap

Variables

  Type Name Description
Public variable uint8 DefaultValue  
Public variable int32 Height  
Public variable TArray< uint8 > RawData  
Public variable int32 Width  

Functions

  Type Name Description
Public function Const void

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

 Checks the image to determine if it is suitable for opaque, masked or translucent rendering.
Public function void  
Public function void

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

 Sets pixels to 1 marking the rectangle outline.
Public function void

ExtractFromTexture ( UTexture* SourceTexture
)

  
Public function  

FAlphaBitmap ( UTexture* SourceTexture,
uint8 InDefaultValue
)

  
Public function  

FAlphaBitmap ( int InWidth,
int InHeight,
int InDefaultValue
)

 Create an empty bitmap.
Public function void

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

  
Public function Const bool

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

 Wind through the bitmap from StartX, StartY to find the closest hit point.
Public function Const uint8

GetPixel ( int X,
int Y
)

  
Public function Const void

GetTightBounds ( FIntPoint& OutOrigin,
FIntPoint& OutDimension
)

 Returns the tight bounding box around pixels that are not 0.
Public function Const bool

IsColumnEmpty ( int X,
int Y0,
int Y1
)

  
Public function Const bool

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

  
Public function bool

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

 Is the rectangle empty (X0..X1, Y0..Y1 inclusive)
Public function Const bool

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

 Is the rectangle empty (X0..X1, Y0..Y1 inclusive)
Public function Const bool

IsRowEmpty ( int X0,
int X1,
int Y
)

  
Public function Const bool

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

  
Public function Const bool

IsValid ()

  
Public function void

SetPixel ( int X,
int Y,
uint8 Value
)

  
Public function void

ThresholdImage ( int32 AlphaThreshold
)

  
Public function void

ThresholdImageBothWays ( int32 LowAlphaThreshold,
int32 HighAlphaThreshold
)

 Flushes values smaller or equal to LowAlphaThreshold to 0, and values greater or equal to HighAlphaThreshold to 255.
Public function Const void

TightenBounds ( FIntPoint& InOutOrigin,
FIntPoint& InOutDimension
)

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

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