CFbsBitmapDevice Class Reference

class CFbsBitmapDevice : public CFbsDevice

A graphics device to which a bitmap managed by the font and bitmap server can be drawn.

The class specialises the bitmap graphics device interface CBitmapDevice for drawing to in-memory bitmaps.

Inherits from

CFbsBitmapDevice
- CFbsDevice
  - CBitmapDevice
    - CGraphicsDevice
      - CBase

Public Member Functions
	~CFbsBitmapDevice()
IMPORT_C void	DrawingBegin(TBool)
IMPORT_C void	DrawingEnd(TBool)
IMPORT_C TInt	GetPalette(CPalette *&)
IMPORT_C void	GetPixel(TRgb &, const TPoint &)
IMPORT_C void	GetScanLine(TDes8 &, const TPoint &, TInt, TDisplayMode)
IMPORT_C TInt	HorizontalPixelsToTwips(TInt)
IMPORT_C TInt	HorizontalTwipsToPixels(TInt)
IMPORT_C CFbsBitmapDevice *	NewL(CFbsBitmap *)
IMPORT_C CFbsBitmapDevice *	NewL(CFbsBitmap *, const TDesC &)
IMPORT_C void	PaletteAttributes(TBool &, TInt &)
IMPORT_C TInt	Resize(const TSize &)
IMPORT_C void	SetPalette(CPalette *)
IMPORT_C TSize	SizeInTwips()
IMPORT_C TInt	SwapWidthAndHeight()
IMPORT_C TInt	VerticalPixelsToTwips(TInt)
IMPORT_C TInt	VerticalTwipsToPixels(TInt)

Private Member Functions
	CFbsBitmapDevice()
void	ConstructL(CFbsBitmap *)
void	ConstructL(CFbsBitmap *, const TDesC &)
void	SetBits()

Inherited Functions
	CBase::CBase()
	CBase::Delete(CBase *)
	CBase::Extension_(TUint,TAny &,TAny )
	CBase::operator new(TUint)
	CBase::operator new(TUint,TAny *)
	CBase::operator new(TUint,TLeave)
	CBase::operator new(TUint,TLeave,TUint)
	CBase::operator new(TUint,TUint)
	CBase::~CBase()
	CBitmapDevice::CreateBitmapContext(CBitmapContext *&)
	CFbsDevice::AddFile(const TDesC &,TInt &)
	CFbsDevice::CFbsDevice()
	CFbsDevice::CancelSprite()const
	CFbsDevice::CreateContext(CFbsBitGc *&)
	CFbsDevice::CreateContext(CGraphicsContext *&)
	CFbsDevice::DisplayMode()const
	CFbsDevice::DisplayMode16M()
	CFbsDevice::DoGetScanLine(TDes8 &,const TPoint &,TInt,TDisplayMode)
	CFbsDevice::DrawingBegin(const CFbsBitmap *,TBool)
	CFbsDevice::DrawingEnd(const CFbsBitmap *,TBool)
	CFbsDevice::FontHeightInPixels(TInt,TInt)const
	CFbsDevice::FontHeightInTwips(TInt,TInt)const
	CFbsDevice::GetDrawRect(TRect &)const
	CFbsDevice::GetFontById(CFbsFont *&,TUid,const TAlgStyle &)
	CFbsDevice::GetFontById(CFont *&,TUid,const TAlgStyle &)
	CFbsDevice::GetNearestFbsFont(CFbsFont *&,const TFontSpec &)
	CFbsDevice::GetNearestFontInPixels(CFbsFont *&,const TFontSpec &)
	CFbsDevice::GetNearestFontInPixels(CFont *&,const TFontSpec &)
	CFbsDevice::GetNearestFontInTwips(CFbsFont *&,const TFontSpec &)
	CFbsDevice::GetNearestFontInTwips(CFont *&,const TFontSpec &)
	CFbsDevice::GetNearestFontToDesignHeightInPixels(CFbsFont *&,const TFontSpec &)
	CFbsDevice::GetNearestFontToDesignHeightInPixels(CFont *&,const TFontSpec &)
	CFbsDevice::GetNearestFontToDesignHeightInTwips(CFbsFont *&,const TFontSpec &)
	CFbsDevice::GetNearestFontToDesignHeightInTwips(CFont *&,const TFontSpec &)
	CFbsDevice::GetNearestFontToMaxHeightInPixels(CFbsFont *&,const TFontSpec &,TInt)
	CFbsDevice::GetNearestFontToMaxHeightInPixels(CFont *&,const TFontSpec &,TInt)
	CFbsDevice::GetNearestFontToMaxHeightInTwips(CFbsFont *&,const TFontSpec &,TInt)
	CFbsDevice::GetNearestFontToMaxHeightInTwips(CFont *&,const TFontSpec &,TInt)
	CFbsDevice::GraphicsAccelerator()const
	CFbsDevice::HideSprite()const
	CFbsDevice::HideSprite(const TRect &,const TRegion *)const
	CFbsDevice::NumTypefaces()const
	CFbsDevice::Orientation()const
	CFbsDevice::ReadLineDiffMode(TInt,TInt,TInt,TAny *,TDisplayMode)const
	CFbsDevice::RectCompare(const TRect &,const CFbsDevice &,const TRect &)const
	CFbsDevice::RegisterLinkedTypeface(const CLinkedTypefaceSpecification &,TInt &)
	CFbsDevice::ReleaseFont(CFont *)
	CFbsDevice::RemoveFile(TInt)
	CFbsDevice::SetCustomPalette(const CPalette *)
	CFbsDevice::SetDrawDeviceOffset(const TPoint &)
	CFbsDevice::SetOrientation(CFbsBitGc::TGraphicsOrientation)
	CFbsDevice::SetScalingFactor(const TPoint &,TInt,TInt,TInt,TInt)
	CFbsDevice::ShowSprite(TSpriteBase *)const
	CFbsDevice::ShowSprite(TSpriteBase ,const TRect &,const TRegion )const
	CFbsDevice::SizeInPixels()const
	CFbsDevice::TruncateRect(TRect &)
	CFbsDevice::TypefaceSupport(TTypefaceSupport &,TInt)const
	CFbsDevice::~CFbsDevice()

Private Attributes
CFbsBitGcBitmap *	iFbsBmp

Inherited Attributes
	CFbsDevice::iBitBltMaskedBuffer
	CFbsDevice::iDrawDevice
	CFbsDevice::iFbs
	CFbsDevice::iGraphicsAccelerator
	CFbsDevice::iOrientation
	CFbsDevice::iScreenDevice
	CFbsDevice::iSpare
	CFbsDevice::iTypefaceStore

Constructor & Destructor Documentation

CFbsBitmapDevice()

CFbsBitmapDevice

(

)

[private]

~CFbsBitmapDevice()

IMPORT_C

~CFbsBitmapDevice

(

)

[virtual]

Member Functions Documentation

ConstructL(CFbsBitmap *)

void

ConstructL

(

CFbsBitmap *

aFbsBitmap

)

[private]

Parameters

CFbsBitmap * aFbsBitmap

ConstructL(CFbsBitmap *, const TDesC &)

void	ConstructL	(	CFbsBitmap *	aFbsBitmap,
			const TDesC &	aLibname
		)	[private]

Parameters

CFbsBitmap * aFbsBitmap
const TDesC & aLibname

DrawingBegin(TBool)

IMPORT_C void

DrawingBegin

(

TBool

aAlways = EFalse

)

[virtual]

Parameters

TBool aAlways = EFalse

DrawingEnd(TBool)

IMPORT_C void

DrawingEnd

(

TBool

aAlways = EFalse

)

[virtual]

Parameters

TBool aAlways = EFalse

GetPalette(CPalette *&)

IMPORT_C TInt

GetPalette

(

CPalette *&

aPalette

)

const [virtual]

Gets the device's current palette.

This function is only supported if the device has a modifiable palette, which can be determined by calling PaletteAttributes().

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

Parameters

CPalette *& aPalette

On return, holds the device's current palette.

GetPixel(TRgb &, const TPoint &)

IMPORT_C void	GetPixel	(	TRgb &	aColor,
			const TPoint &	aPixel
		)	const [virtual]

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

This pure virtual function is implemented in derived classes.

Parameters

TRgb & aColor	On return, should contain the RGB colour of the pixel.
const TPoint & aPixel	The (x,y) co-ordinates of the pixel. The top left pixel is (0,0).

GetScanLine(TDes8 &, const TPoint &, TInt, TDisplayMode)

IMPORT_C void	GetScanLine	(	TDes8 &	aBuf,
			const TPoint &	aStartPixel,
			TInt	aLength,
			TDisplayMode	aDispMode
		)	const [virtual]

Copies a scanline into a buffer.

The pixels are converted from the display mode format on the bitmapped graphics device to the format of the specified device display mode.

By specifying the start pixel and the number of pixels, either the whole or a portion of a bitmapped graphics device pixel row may be copied.

This pure virtual function is implemented in derived classes.

Parameters

TDes8 & aBuf	An 8 bit modifiable descriptor buffer into which pixels are copied; it must be sufficiently large to store all the scanline pixels.
const TPoint & aStartPixel	The (x,y) co-ordinates of the first pixel of the bitmap scanline to be put into the buffer.
TInt aLength	The number of pixels to put into the buffer.
TDisplayMode aDispMode	The display mode into which to convert the pixels.

HorizontalPixelsToTwips(TInt)

IMPORT_C TInt

HorizontalPixelsToTwips

(

TInt

aPixels

)

const [virtual]

Parameters

TInt aPixels

HorizontalTwipsToPixels(TInt)

IMPORT_C TInt

HorizontalTwipsToPixels

(

TInt

aTwips

)

const [virtual]

Parameters

TInt aTwips

NewL(CFbsBitmap *)

IMPORT_C CFbsBitmapDevice *

NewL

(

CFbsBitmap *

aFbsBitmap

)

[static]

Parameters

CFbsBitmap * aFbsBitmap

NewL(CFbsBitmap *, const TDesC &)

IMPORT_C CFbsBitmapDevice *	NewL	(	CFbsBitmap *	aFbsBitmap,
			const TDesC &	aLibname
		)	[static]

Parameters

CFbsBitmap * aFbsBitmap
const TDesC & aLibname

PaletteAttributes(TBool &, TInt &)

IMPORT_C void	PaletteAttributes	(	TBool &	aModifiable,
			TInt &	aNumEntries
		)	const [virtual]

Gets the palette attributes of the device.

Parameters

TBool & aModifiable	On return, holds information on whether or not the device's palette is modifiable (ETrue) or fixed (EFalse).
TInt & aNumEntries	On return, holds the number of entries in the device's palette.

Resize(const TSize &)

IMPORT_C TInt

Resize

(

const TSize &

aSize

)

Parameters

const TSize & aSize

SetBits()

void

SetBits

(

)

[private, virtual]

Sets the bit level.

SetPalette(CPalette *)

IMPORT_C void

SetPalette

(

CPalette *

aPalette

)

[virtual]

Sets the device's palette.

Setting the palette is only possible if the device has a modifiable palette, which can be determined by calling PaletteAttributes().

Parameters

CPalette * aPalette

The new palette for the device.

SizeInTwips()

IMPORT_C TSize

SizeInTwips

(

)

const [virtual]

Gets the size of the device area in twips.

The width and height of the device area, in twips

SwapWidthAndHeight()

IMPORT_C TInt

SwapWidthAndHeight

(

)

VerticalPixelsToTwips(TInt)

IMPORT_C TInt

VerticalPixelsToTwips

(

TInt

aPixels

)

const [virtual]

Parameters

TInt aPixels

VerticalTwipsToPixels(TInt)

IMPORT_C TInt

VerticalTwipsToPixels

(

TInt

aTwips

)

const [virtual]

Parameters

TInt aTwips

Member Data Documentation

CFbsBitGcBitmap * iFbsBmp

CFbsBitGcBitmap *

iFbsBmp

[private]