Class TGopScaledBitBltMasked

class TGopScaledBitBltMasked : public TGraphicsOperation;

Description

An accelerated graphics operation that copies a rectangular region of one bitmap into a different sized region of another, using a third bitmap as a mask.

The mask must be the same size as the source bitmap. The parts of the source bitmap that are drawn are the areas that are black in the mask.

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

• TGopScaledBitBltMasked - An accelerated graphics operation that copies a rectangular region of one bitmap into a different sized region of another, using a third bitmap as a mask

Members

Defined in TGopScaledBitBltMasked:
TGopScaledBitBltMasked(), iDestination, iMask, 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::iMaskType

inline TGopScaledBitBltMasked(const TRect &aDestination, TAcceleratedBitmapSpec aSourceBitmap, TRect &aSourceRect, TAcceleratedBitmapSpec aMask);

Description

Constructor with a source and destination rectangle, and handles to the source and mask bitmaps.

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 aMask A handle to the mask bitmap.

TRect iDestination;

Description

The destination rectangle for the portion of the bitmap.

TAcceleratedBitmapSpec iSourceBitmap;

Description

A handle to the source bitmap.

TRect iSourceRect;

Description

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

TAcceleratedBitmapSpec iMask;

Description

A handle to the source bitmap mask.