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 into a different sized region of another using alpha blending values provided in a third bitmap

Members

Defined in TGopScaledBitBltAlphaBitmap:
TGopScaledBitBltAlphaBitmap(), iAlphaBitmap, iDestination, iSourceBitmap, iSourceRect

Inherited from TGraphicsOperation:
Append(), EAlphaBlendOneBitmap, EAlphaBlendTwoBitmaps, EBitBlt, EBitBltAlphaBitmap, EBitBltAlphaChannel, EBitBltMasked, EBitBltTransparent, EFadeRect, EFilledPolygon, EFilledPolygonWithPattern, EFilledRect, EFilledRectUsingDrawMode, EFilledRectWithPattern, EInvertRect, EScaledBitBlt, EScaledBitBltAlphaBitmap, EScaledBitBltAlphaChannel, EScaledBitBltMasked, EScaledBitBltTransparent, Function(), Next(), Size(), TGopFunction, iFunction, iSize

See also:

• TGraphicsAcceleratorCaps::iAlphaBitmap

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.