TGopScaledBitBltMasked Class Reference

class TGopScaledBitBltMasked : public TGraphicsOperation

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.

TGraphicsAcceleratorCaps::iMaskType

Inherits from

Constructor & Destructor Documentation

TGopScaledBitBltMasked(const TRect &, TAcceleratedBitmapSpec, TRect &, TAcceleratedBitmapSpec)

TGopScaledBitBltMasked(const TRect &aDestination,
TAcceleratedBitmapSpecaSourceBitmap,
TRect &aSourceRect,
TAcceleratedBitmapSpecaMask
)[inline]

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

Parameters

const TRect & aDestinationThe destination for the portion of the source bitmap. If necessary, the source bitmap portion is resized to fit into this rectangle.
TAcceleratedBitmapSpec aSourceBitmapA handle to the source bitmap, and other information needed to draw it.
TRect & aSourceRectA 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 aMaskA handle to the mask bitmap.

Member Data Documentation

TRect iDestination

TRect iDestination

The destination rectangle for the portion of the bitmap.

TAcceleratedBitmapSpec iMask

TAcceleratedBitmapSpec iMask

A handle to the source bitmap mask.

TAcceleratedBitmapSpec iSourceBitmap

TAcceleratedBitmapSpec iSourceBitmap

A handle to the source bitmap.

TRect iSourceRect

TRect iSourceRect

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