Class CFbsBitmapDevice

CFbsBitmapDevice

Support

Supported from 5.0

Description

A Font Bitmap server managed bitmap as a graphics device

Derivation

CBase Base class for all classes to be instantiated on the heap CBitmapDevice Defines an interface for the capabilities and attributes of a bitmapped graphics device CFbsBitmapDevice A Font Bitmap server managed bitmap as a graphics device CFbsDevice Abstract base class for graphics devices to which bitmaps and fonts can be drawn CGraphicsDevice Specifies the interface for concrete device classes MGraphicsDeviceMap Interface class for mapping between twips and device-specific units (pixels)

Defined in CFbsBitmapDevice:
DrawingBegin(), DrawingEnd(), GetPalette(), GetPixel(), GetScanLine(), HorizontalPixelsToTwips(), HorizontalTwipsToPixels(), NewL(), PaletteAttributes(), Resize(), SetPalette(), SizeInTwips(), VerticalPixelsToTwips(), VerticalTwipsToPixels(), ~CFbsBitmapDevice()

Inherited from CBase:
operator new()

Inherited from CBitmapDevice:
CreateBitmapContext()

Inherited from CFbsDevice:
AddFile(), CreateContext(), DisplayMode(), FontHeightInPixels(), FontHeightInTwips(), GetFontById(), GetNearestFontInPixels(), GetNearestFontInTwips(), NumTypefaces(), RectCompare(), ReleaseFont(), RemoveFile(), SetCustomPalette(), SizeInPixels(), TypefaceSupport()

Inherited from MGraphicsDeviceMap:
PixelsToTwips(), TwipsToPixels()

static CFbsBitmapDevice* NewL(CFbsBitmap* aFbsBitmap);

Description

Constructs the object from the specified Font and Bitmap server managed bitmap.

Parameters

CFbsBitmap* aFbsBitmap A pointer to a Font and Bitmap server managed bitmap.

Return value

CFbsBitmapDevice* A pointer to the newly constructed graphics device.

virtual ~CFbsBitmapDevice();

Description

Frees all resources owned by the object prior to its destruction.

TInt Resize(const TSize& aSize);

Description

Resizes the bitmap device to the new specified size.

Parameters

const TSize& aSize The new size.

Return value

TInt KErrNone, if successful; otherwise another of the system-wide error codes.

virtual TSize SizeInTwips() const;

Description

Gets the size of the bitmap device, in twips.

Return value

TSize The size of the bitmap device.

virtual void DrawingBegin(TBool aAlways);

Description

Starts drawing.

Parameters

TBool aAlways ETrue, lock the shared heap; EFalse, don't lock the heap.

virtual void DrawingEnd(TBool aAlways);

Description

Ends drawing

Parameters

TBool aAlways ETrue, lock the shared heap; EFalse, don't lock the heap.

virtual void GetPixel(TRgb& aColor,const TPoint& aPixel) const;

Description

Gets the RGB colour of an individual pixel on a bitmapped graphics device.

The function provides a concrete implementation of the pure virtual function CBitmapDevice::GetPixel().

See also:

• CBitmapDevice::GetPixel()

virtual void GetScanLine(TDes8& aBuf,const TPoint& aStartPixel,TInt aLength,TDisplayMode iDispMode) const;

Description

Copies a scanline into a buffer.

The function provides a concrete implementation of the pure virtual function CBitmapDevice::GetScanLine().

See also:

• CBitmapDevice::GetScanLine()

virtual TInt HorizontalPixelsToTwips(TInt aPixels) const=0;

Description

Converts a horizontal dimension of a device in pixels to a horizontal dimension in twips.

The function provides a concrete implementation of the pure virtual function MGraphicsDeviceMap::HorizontalPixelsToTwips().

See also:

• MGraphicsDeviceMap::HorizontalPixelsToTwips()

virtual TInt HorizontalTwipsToPixels(TInt aTwips) const;

Description

Converts a horizontal dimension of a device in twips to a horizontal dimension in pixels.

The function provides a concrete implementation of the pure virtual function MGraphicsDeviceMap::HorizontalTwipsToPixels().

See also:

• MGraphicsDeviceMap::HorizontalTwipsToPixels()

virtual TInt VerticalTwipsToPixels(TInt aTwips) const;

Description

Converts a vertical dimension of a device in twips to a vertical dimension in pixels.

The function provides a concrete implementation of the pure virtual function MGraphicsDeviceMap::VerticalTwipsToPixels().

See also:

• MGraphicsDeviceMap::VerticalTwipsToPixels()

virtual TInt VerticalPixelsToTwips(TInt aPixels) const;

Description

Converts a vertical dimension of a device in pixels to a vertical dimension in twips.

The function provides a concrete implementation of the pure virtual function MGraphicsDeviceMap::VerticalPixelsToTwips().

See also:

• MGraphicsDeviceMap::VerticalPixelsToTwips()

virtual TInt GetPalette(CPalette*& aPalette) const;

Description

Gets the device's current palette.

The function provides a concrete implementation of the pure virtual function CGraphicsDevice::GetPalette().

See also:

• CGraphicsDevice::GetPalette()

virtual void PaletteAttributes(TBool& aModifiable,TInt& aNumEntries) const;

Description

Gets the palette attributes of the device.

The function provides a concrete implementation of the pure virtual function CGraphicsDevice::PaletteAttributes().

See also:

• CGraphicsDevice::PaletteAttributes()

virtual void SetPalette(CPalette* aPalette);

Description

Sets the device's palette to the specified palette.

The function provides a concrete implementation of the pure virtual function CGraphicsDevice::SetPalette().

See also:

• CGraphicsDevice::SetPalette()