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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