TGopScaledBitBltAlphaBitmap Class Reference
| class TGopScaledBitBltAlphaBitmap : public TGraphicsOperation |
An accelerated graphics operation that copies a rectangular region of one bitmap into a different sized region of another using alpha blending values provided in a third 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.
TGraphicsAcceleratorCaps::iAlphaBitmap
Inherits from
- TGopScaledBitBltAlphaBitmap
Constructor & Destructor Documentation
TGopScaledBitBltAlphaBitmap(const TRect &, TAcceleratedBitmapSpec, TRect &, TAcceleratedBitmapSpec)
Constructor with a source and destination rectangle and two bitmap handles.
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. |
| TAcceleratedBitmapSpec aAlphaBitmap | A handle to the bitmap that contains alpha blending values. |
Member Data Documentation
TAcceleratedBitmapSpec
iAlphaBitmap
A handle to the bitmap that contains alpha blending values.
TRect
iDestination
The destination for the portion of the bitmap.
TAcceleratedBitmapSpec
iSourceBitmap
A handle to the source bitmap, and other information needed to draw it.
TRect
iSourceRect
A rectangle defining the part of the source bitmap to be copied.
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