Class TGopScaledBitBltTransparent

class TGopScaledBitBltTransparent : public TGraphicsOperation;

Description

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

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

Members

Defined in TGopScaledBitBltTransparent:
TGopScaledBitBltTransparent(), 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 TGopScaledBitBltTransparent(const TRect &aDestination, TAcceleratedBitmapSpec aSourceBitmap, TRect &aSourceRect, TGopTransparency aTransparency);

Description

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

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. TGopTransparency aTransparency A specification for which pixels in the source bitmap should be treated as transparent.

TRect iDestination;

Description

The destination rectangle for the portion of the source 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.

TGopTransparency iTransparency;

Description

A specification for which pixels in the source bitmap should be treated as transparent.