Class TGopBitBltTransparent

class TGopBitBltTransparent : public TGraphicsOperation;

Description

An accelerated graphics operation that copies a rectangular region of one bitmap into another, with some transparent pixels in the 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

• TGopBitBltTransparent - An accelerated graphics operation that copies a rectangular region of one bitmap into another, with some transparent pixels in the bitmap

Members

Defined in TGopBitBltTransparent:
TGopBitBltTransparent(), iDestination, iSourceBitmap, iSourceRect, iTransparency

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::iTransparency
• TGopTransparency

inline TGopBitBltTransparent(const TPoint &aDestination, TAcceleratedBitmapSpec aSourceBitmap, TRect &aSourceRect, TGopTransparency aTransparency);

Description

Constructor with a destination, a handle to the source bitmap, a rectangle and a specification for which pixels should be treated as transparent.

Parameters

const TPoint &aDestination The destination for the top left hand corner of the portion of the source bitmap. 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 bitmap. Defines the part of the source bitmap to be copied. TGopTransparency aTransparency A specification for which pixels in the source bitmap should be treated as transparent.

TPoint iDestination;

Description

The destination for the top left hand corner of 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 all or a part of the bitmap to be copied.

TGopTransparency iTransparency;

Description

A specification for which pixels should be treated as transparent.