TGopScaledBitBltAlphaChannel Class Reference
| class TGopScaledBitBltAlphaChannel : public TGraphicsOperation |
An accelerated graphics operation that copies a rectangular region of one bitmap into a different sized region of another using alpha blending. The alpha value is part of each pixel in the source bitmap.
Supported bitmap formats with an alpha-channel are given in by TGraphicsAcceleratorCaps::iAlphaChannel.
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::iAlphaChannel
Inherits from
- TGopScaledBitBltAlphaChannel
Constructor & Destructor Documentation
TGopScaledBitBltAlphaChannel(const TRect &, TAcceleratedBitmapSpec, TRect &)
Constructor with a destination rectangle, a handle to the source bitmap and a source rectangle.
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. |
Member Data Documentation
TRect
iDestination
The destination for the portion of the source 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.
Copyright ©2010 Nokia Corporation and/or its subsidiary(-ies).
All rights
reserved. Unless otherwise stated, these materials are provided under the terms of the Eclipse Public License
v1.0.