Class TGopScaledBitBltAlphaBitmap

class TGopScaledBitBltAlphaBitmap : public TGraphicsOperation;

Description

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.

Derivation

• TGraphicsOperation - Abstract base class for all graphics operations.

• TGopScaledBitBltAlphaBitmap - An accelerated graphics operation that copies a rectangular region of one bitmap...

Members

Defined in TGopScaledBitBltAlphaBitmap:

• TGopScaledBitBltAlphaBitmap(const TRect &,TAcceleratedBitmapSpec,TRect &,TAcceleratedBitmapSpec)Constructor with a source and destination rectangle and two bitmap handles.
• iAlphaBitmapA handle to the bitmap that contains alpha blending values.
• iDestinationThe destination for the portion of the bitmap.
• iSourceBitmapA handle to the source bitmap, and other information needed to draw it.
• iSourceRectA rectangle defining the part of the source bitmap to be copied.

Inherited from TGraphicsOperation:

• Append(TInt,TAny *)
• EAlphaBlendOneBitmap
• EAlphaBlendTwoBitmaps
• EBitBlt
• EBitBltAlphaBitmap
• EBitBltAlphaChannel
• EBitBltMasked
• EBitBltTransparent
• EChunkTest
• EFadeRect
• EFilledPolygon
• EFilledPolygonWithPattern
• EFilledRect
• EFilledRectUsingDrawMode
• EFilledRectWithPattern
• EInvertRect
• EScaledBitBlt
• EScaledBitBltAlphaBitmap
• EScaledBitBltAlphaChannel
• EScaledBitBltMasked
• EScaledBitBltTransparent
• EVirtualAddressTest
• Function()const
• Next()const
• Size()const
• TGopFunction
• TGraphicsOperation(TGopFunction,TInt)
• iFunction
• iSize

See also:

• TGraphicsAcceleratorCaps::iAlphaBitmapSpecifies the supported alpha bitmap types. Uses a bit flag for each TAlphaBitma...

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

Description

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.

TRect iDestination;

Description

The destination for the portion of the bitmap.

TAcceleratedBitmapSpec iSourceBitmap;

Description

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

TRect iSourceRect;

Description

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

TAcceleratedBitmapSpec iAlphaBitmap;

Description

A handle to the bitmap that contains alpha blending values.