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...

Members

Defined in TGopBitBltTransparent:

• TGopBitBltTransparent(const TPoint &,TAcceleratedBitmapSpec,TRect &,TGopTransparency)Constructor with a destination, a handle to the source bitmap, a rectangle and a...
• iDestinationThe destination for the top left hand corner of the portion of the bitmap.
• iSourceBitmapA handle to the source bitmap, and other information needed to draw it.
• iSourceRectA rectangle defining all or a part of the bitmap to be copied.
• iTransparencyA specification for which pixels should be treated as transparent.

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::iTransparencySpecifies the transparency types supported. Uses a bit flag for each TTransparen...
• TGopTransparencySpecifies which pixels should be treated as transparent in a bitblt operation th...

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.