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MOpenFontShapingExtension Class Reference

class MOpenFontShapingExtension

Open Font System Extension Interface abstract base class.

COpenFont derivers should also derive from this interface to enable complex font "shaping".

This interface should be returned by the overridden COpenFont::ExtendedInterface function when KUidOpenFontShapingExtension is supplied as the UID.

COpenFont KUidOpenFontShapingExtension

Nested Classes and Structures

MOpenFontShapingExtension::TExtensionFontMetrics

Public Member Functions
void	GetExtensionFontMetrics ( TExtensionFontMetrics &)
TInt	GlyphIndex ( TInt )
TBool	GlyphPointInFontUnits ( TInt , TInt , TInt &, TInt &)
TBool	GlyphPointInHintedPixels ( TInt , TInt , TReal &, TReal &)
void	RasterizeGlyphL ( TInt , TOpenFontGlyphData *)

Member Functions Documentation

GetExtensionFontMetrics(TExtensionFontMetrics &)

void

GetExtensionFontMetrics

(

TExtensionFontMetrics &

aOut

)

[pure virtual]

Returns font metrics.

Parameters

TExtensionFontMetrics & aOut

Font metrics returned.

GlyphIndex(TInt)

TInt

GlyphIndex

(

TInt

aUnicodeCharacter

)

const [pure virtual]

Maps a character to a glyph index.

Parameters

TInt aUnicodeCharacter

Unicode character code to be mapped.

GlyphPointInFontUnits(TInt, TInt, TInt &, TInt &)

TBool	GlyphPointInFontUnits	(	TInt	aGlyphIndex,
			TInt	aPointNumber,
			TInt &	aX,
			TInt &	aY
		)	const [pure virtual]

Returns the coordinates of a particular (unhinted) point in the outline of the given glyph in font units.

Parameters

TInt aGlyphIndex
TInt aPointNumber	The number of the point.
TInt & aX	Returns the point's X co-ordinate in font units.
TInt & aY	Returns the point's Y co-ordinate in font units.

GlyphPointInHintedPixels(TInt, TInt, TReal &, TReal &)

TBool	GlyphPointInHintedPixels	(	TInt	aGlyphIndex,
			TInt	aPointNumber,
			TReal &	aX,
			TReal &	aY
		)	const [pure virtual]

Returns the hinted pixel coordinates of a particular point in the outline of the given glyph.

Parameters

TInt aGlyphIndex
TInt aPointNumber	The number of the point.
TReal & aX	Returns the point's X pixel value.
TReal & aY	Returns the point's Y pixel value.

RasterizeGlyphL(TInt, TOpenFontGlyphData *)

void	RasterizeGlyphL	(	TInt	aCode,
			TOpenFontGlyphData *	aGlyphData
		)	[pure virtual]

Creates a bitmap for the specified Glyph code.

Implementations of this function should put the bitmap in aGlyphData->iBitmapBuffer, and the character metrics are placed in aGlyphData->iMetricsBuffer. The other parts of aGlyphData should be left alone.

This function provides the same functionality as the COpenFont::RasterizeL() except that the glyph code is supplied rather than the unicode.

For more information: COpenFont::RasterizeL()

Parameters

TInt aCode	The glyph code of the character for which the bitmap is required.
TOpenFontGlyphData * aGlyphData	The function puts its output here.