MImageConvScaler Class Reference

#include <icl/imageconversionextensionintf.h>

class MImageConvScaler : public MImageConvExtension

Inherits from

Public Member Functions
pure virtual void	GetCapabilities(TScalerCaps &)
pure virtual void	SetScalingL(const TSize &, TImageConvScaler::TScalerQuality, TBool)
pure virtual void	SetScalingL(TInt, TImageConvScaler::TScalerQuality)

Inherited Functions
	MImageConvExtension::IncrementRef()
	MImageConvExtension::Release()
	MImageConvExtension::Uid()const

Scaling extension for Image Conversion Library

void

GetCapabilities

(

aCaps

)

const [pure virtual]

Gets the scaling capabilities.

Parameters
aCaps	Returns scaling capabilities of the codec plugin.

void	SetScalingL	(	const TSize &	aDesiredSize,
			TImageConvScaler::TScalerQuality	aQuality,
			TBool	aLockAspectRatio
		)	[pure virtual]

Request scaling to the desired size using the quality specified and specifying if the aspect ratio is to be preserved.

Parameters
aDesiredSize	Proposed size of the scaled image.
aQuality	Desired quality of the image. Allows codec to lower quality targets to improve performance.
aLockAspectRatio	Set to ETrue if the aspect ratio of the original image is to be preserved.

Leave Codes
KErrNotSupported	if an invalid size is passed.
KErrNotSupported	if aLockAspectRatio is EFalse and codec only supports preservation of aspect ratio.

void	SetScalingL	(	TInt	aScalingCoeff,
			TImageConvScaler::TScalerQuality	aScalingQuality
		)	[pure virtual]

Define the scaling to be applied to the image according to the given coefficient at the requested quality.

Parameters
aScalingCoeff	Scale to apply to the source. 2 means twice the original size, -2 half the size. Do not confuse this with ReductionFactor where 2 indicates 1/2 size.
aScalingQuality	Desired quality of the image. Allows codec to lower quality targets to improve performance.

Leave Codes
KErrNotSupported	if codec cannot perform the requested scale.