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TGopScaledBitBltAlphaBitmap Class Reference

class TGopScaledBitBltAlphaBitmap : public TGraphicsOperation

An accelerated graphics operation that copies a rectangular region of one bitmap into a different sized region of another using alpha blending values provided in a third bitmap.

The data members are all initialised on construction. Objects of this class can be passed to a graphics accelerator's Operation() function either individually, or in a buffer.

TGraphicsAcceleratorCaps::iAlphaBitmap

Inherits from

TGopScaledBitBltAlphaBitmap
- TGraphicsOperation

Public Member Functions
	TGopScaledBitBltAlphaBitmap (const TRect &, TAcceleratedBitmapSpec , TRect &, TAcceleratedBitmapSpec )

Inherited Functions
	TGraphicsOperation::Append(TInt,TAny *)
	TGraphicsOperation::Function()const
	TGraphicsOperation::Next()const
	TGraphicsOperation::Size()const
	TGraphicsOperation::TGraphicsOperation()
	TGraphicsOperation::TGraphicsOperation(TGopFunction,TInt)

Inherited Enumerations
	TGraphicsOperation:TGopFunction

Public Attributes
TAcceleratedBitmapSpec	iAlphaBitmap
TRect	iDestination
TAcceleratedBitmapSpec	iSourceBitmap
TRect	iSourceRect

Inherited Attributes
	TGraphicsOperation::iFunction
	TGraphicsOperation::iSize

Constructor & Destructor Documentation

TGopScaledBitBltAlphaBitmap(const TRect &, TAcceleratedBitmapSpec, TRect &, TAcceleratedBitmapSpec)

TGopScaledBitBltAlphaBitmap	(	const TRect &	aDestination,
		TAcceleratedBitmapSpec	aSourceBitmap,
		TRect &	aSourceRect,
		TAcceleratedBitmapSpec	aAlphaBitmap
	)	[inline]

Constructor with a source and destination rectangle and two bitmap handles.

Parameters

const TRect & aDestination	The destination for the portion of the source bitmap. If necessary, the source bitmap portion is resized to fit into this rectangle.
TAcceleratedBitmapSpec aSourceBitmap	A handle to the source bitmap, and other information needed to draw it.
TRect & aSourceRect	A rectangle within the source bitmap. Its coordinates are relative to the top left of the source bitmap. Defines the part of the source bitmap to be copied.
TAcceleratedBitmapSpec aAlphaBitmap	A handle to the bitmap that contains alpha blending values.

Member Data Documentation

TAcceleratedBitmapSpec iAlphaBitmap

TAcceleratedBitmapSpec

iAlphaBitmap

A handle to the bitmap that contains alpha blending values.

TRect iDestination

TRect

iDestination

The destination for the portion of the bitmap.

TAcceleratedBitmapSpec iSourceBitmap

TAcceleratedBitmapSpec

iSourceBitmap

A handle to the source bitmap, and other information needed to draw it.

TRect iSourceRect

TRect

iSourceRect

A rectangle defining the part of the source bitmap to be copied.