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MIHLScaler Class Reference

class MIHLScaler

Pure virtual interface to bitmap scaler using Font and Bitmap Server bitmaps.

If interface needs to be pushed into CleanupStack , remember to use CleanupStackDeletePushL() function! DO NOT USE CleanupStack::PushL() !!

IHL.lib

Since: 3.0

Public Member Functions
	~MIHLScaler ()
void	CancelProcess ()
TBool	IsBusy ()
TInt	Scale ( TRequestStatus &, const CFbsBitmap &, const TRect &, CFbsBitmap &, const TRect &)
void	SetFilter (MIHFilter *)

Public Member Enumerations
enum	TOptions { EOptionUseBilinearInterpolation = 0x01 }

Constructor & Destructor Documentation

~MIHLScaler()

~MIHLScaler

(

)

[inline, virtual]

Virtual destructor.

Member Functions Documentation

CancelProcess()

void

CancelProcess

(

)

[pure virtual]

Cancel pending request. If not active, method does nothing.

Since: 3.0

IsBusy()

TBool

IsBusy

(

)

const [pure virtual]

Check if processor has request pending.

Since: 3.0

Scale(TRequestStatus &, const CFbsBitmap &, const TRect &, CFbsBitmap &, const TRect &)

TInt	Scale	(	TRequestStatus &	aStatus,
			const CFbsBitmap &	aSrcBitmap,
			const TRect &	aSrcRect,
			CFbsBitmap &	aDstBitmap,
			const TRect &	aDstRect
		)	[pure virtual]

Scale rectangle from source bitmap to a rectangle in destination bitmap. Scaled area can be also rotated and/or mirrored during process.

Rotating is done by defining SOURCE rectangle topleft and bottomright corners in following way:

No rotate: tl----- 90 degree: -----tl | | | | | | | | -----br br-----

180 degree: br----- 270 degree: -----br | | | | | | | | -----tl tl-----

Mirroring is done by defining DESTINATION rectangle topleft and bottomright corners in following way:

No mirroring: tl----- | | | | -----br

X-axis mirroring: -----tl | | | | br-----

Y-axis mirroring: -----br | | | | tl-----

X and Y-axis br----- mirroring: | | | | -----tl

Since: 3.0

Parameters

TRequestStatus & aStatus	Process request status reference.
const CFbsBitmap & aSrcBitmap	Source bitmap reference.
const TRect & aSrcRect	Rectangle that is processed from source bitmap.
CFbsBitmap & aDstBitmap	Destination bitmap reference. If destination bitmap has null handle, processor will create new bitmap using size of destination rectangle.
const TRect & aDstRect	Rectangle that is filled in destination bitmap.

SetFilter(MIHFilter *)

void

SetFilter

(

MIHFilter *

aFilter

)

[pure virtual]

Set filter. For future use, not used currently!

Since: 3.0

Parameters

MIHFilter * aFilter

Member Enumerations Documentation

Enum TOptions

Flags to control scaler functionality. These can be combined using an OR operation.

Since: 3.0

Enumerators

EOptionUseBilinearInterpolation = 0x01