TGopScaledBitBltMasked Class Reference
#include
<graphicsaccelerator.h>
| class TGopScaledBitBltMasked : public TGraphicsOperation |
Detailed 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.
See also: TGraphicsAcceleratorCaps::iMaskType
Member Attribute Documentation
iDestination
The destination rectangle for the portion of the bitmap.
iMask
A handle to the source bitmap mask.
iSourceBitmap
A handle to the source bitmap.
iSourceRect
A rectangle defining all or a part of the source bitmap to be copied.
Constructor & Destructor Documentation
TGopScaledBitBltMasked ( const TRect &, TAcceleratedBitmapSpec, TRect &, TAcceleratedBitmapSpec )
Constructor with a source and destination rectangle, and handles to the source and mask bitmaps.
| Parameter | Description | | aDestination | The destination for the portion of the source bitmap. If necessary, the source bitmap portion is resized to fit into this rectangle. |
| aSourceBitmap | A handle to the source bitmap, and other information needed to draw it. |
| 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. |
| aMask | A handle to the mask bitmap. |