sl@0: /*
sl@0: * Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: * Symbian implementation of LEFontInstance
sl@0: *
sl@0: */
sl@0: 
sl@0: // Symbian includes
sl@0: #include <stdio.h>
sl@0: #include <gdi.h>
sl@0: #include <openfont.h>
sl@0: #include <fntstore.h>
sl@0: #include <string.h>
sl@0: 
sl@0: // Icu includes
sl@0: #include "layout/LETypes.h"
sl@0: #include "layout/LEFontInstance.h"
sl@0: #include "layout/LESwaps.h"
sl@0: 
sl@0: #include "SymbianFontInstance.h"
sl@0: 
sl@0: //
sl@0: // Finds the high bit by binary searching
sl@0: // through the bits in n.
sl@0: //
sl@0: le_int8 SymbianFontInstance::highBit(le_int32 value)
sl@0: 	{
sl@0:     if (value <= 0) 
sl@0:     	{
sl@0:         return -32;
sl@0:     	}
sl@0: 
sl@0:     le_uint8 bit = 0;
sl@0: 
sl@0:     if (value >= 1 << 16) 
sl@0:     	{
sl@0:         value >>= 16;
sl@0:         bit += 16;
sl@0:     	}
sl@0: 
sl@0:     if (value >= 1 << 8) 
sl@0:     	{
sl@0:         value >>= 8;
sl@0:         bit += 8;
sl@0:     	}
sl@0: 
sl@0:     if (value >= 1 << 4) 
sl@0:     	{
sl@0:         value >>= 4;
sl@0:         bit += 4;
sl@0:     	}
sl@0: 
sl@0:     if (value >= 1 << 2) 
sl@0:     	{
sl@0:         value >>= 2;
sl@0:         bit += 2;
sl@0:     	}
sl@0: 
sl@0:     if (value >= 1 << 1) 
sl@0:     	{
sl@0:         value >>= 1;
sl@0:         bit += 1;
sl@0:     	}
sl@0: 
sl@0:     return bit;
sl@0: 	}
sl@0: 
sl@0: // This is used to build a shaper which does not require the rasteriser
sl@0: // to support table access.  This is required for interworking testing.
sl@0: // #define TRUETYPE_EXTENSION_NOT_SUPPORTED
sl@0: #ifndef TRUETYPE_EXTENSION_NOT_SUPPORTED
sl@0: 
sl@0: 	
sl@0: SymbianFontInstance::SymbianFontInstance(CBitmapFont *aBitmapFont,
sl@0: 	LEErrorCode &status, le_bool aKeepGlyphOfZWJ)
sl@0: 	: fFile(NULL), fUnitsPerEM(0), fAscent(0), fDescent(0), fLeading(0),
sl@0:       fDirectory(NULL), fCMAPMapper(NULL), fHMTXTable(0), fNumGlyphs(0),
sl@0:       fNumLongHorMetrics(0), iFont(aBitmapFont), iKeepGlyphOfZWJ(aKeepGlyphOfZWJ)
sl@0: 
sl@0: 	{
sl@0: 	// get the OpenFont details
sl@0: 	if (!aBitmapFont->IsOpenFont())
sl@0: 		{
sl@0: 		// the font supplied was not a Openfont so ..
sl@0: 		status = LE_ILLEGAL_ARGUMENT_ERROR;
sl@0: 		return;
sl@0: 		}
sl@0: 
sl@0: 	COpenFont* font = aBitmapFont->OpenFont();
sl@0: 
sl@0: 	// get the extended interface
sl@0: 	TAny* ext = 0;
sl@0: 	font->ExtendedInterface(KUidOpenFontShapingExtension, ext);
sl@0: 	MOpenFontShapingExtension* extensionInterface
sl@0: 		= reinterpret_cast<MOpenFontShapingExtension*>(ext);
sl@0: 
sl@0: 	font->ExtendedInterface(KUidOpenFontTrueTypeExtension, ext);
sl@0: 	MOpenFontTrueTypeExtension* trueTypeExtensionInterface
sl@0: 		= reinterpret_cast<MOpenFontTrueTypeExtension*>(ext);
sl@0: 
sl@0: 	/* Currently if the trueTypeExtensionInterface is not available the 
sl@0: 	truetype tables are accessed directly rather than via the rasteriser */
sl@0: 	if (!extensionInterface /* || !trueTypeExtensionInterface*/)
sl@0: 		{
sl@0: 		// this rasterizer does not support the required interface
sl@0: 		// so do not bother to shape
sl@0: 		status = LE_ILLEGAL_ARGUMENT_ERROR;
sl@0: 		return ;
sl@0: 		}
sl@0: 
sl@0: 	iTrueTypeExtensionInterface = trueTypeExtensionInterface;
sl@0: 	iExtensionInterface = extensionInterface;
sl@0: 	
sl@0: 	// get the font file name from the COpenFontFile in the COpenFont
sl@0: 	TBuf8<KMaxFileName> fontFileName;
sl@0: 	fontFileName.Copy(font->File()->FileName());
sl@0: 	fontFileName.ZeroTerminate();
sl@0: 
sl@0: 	/* get the font metrics via the rasterizer */
sl@0: 	MOpenFontShapingExtension::TExtensionFontMetrics fontMetrics;
sl@0: 	extensionInterface->GetExtensionFontMetrics(fontMetrics);
sl@0: 
sl@0:  	/* The number of font design units per em. */
sl@0: 	fUnitsPerEM	= fontMetrics.iUnitsPerEm;
sl@0: 
sl@0: 	/* The size of the font's em square in pixels. */
sl@0: 	fXPixelsPerEm	= fontMetrics.iXPixelsPerEm;
sl@0: 	fYPixelsPerEm	= fontMetrics.iYPixelsPerEm;
sl@0: 
sl@0: 	/* Scaling factors, pixels per font unit. */
sl@0: 	fDeviceScaleY = fontMetrics.iYScaleFactor;
sl@0: 	fDeviceScaleX = fontMetrics.iXScaleFactor;
sl@0: 
sl@0: 	// open the font file
sl@0: 	fFile = fopen( (char *)fontFileName.Ptr(), "rb");
sl@0: 	if (fFile == 0)
sl@0: 		{
sl@0: 		status = LE_FONT_FILE_NOT_FOUND_ERROR;
sl@0: 		return;
sl@0: 		}
sl@0: 
sl@0:     // read in the directory
sl@0:     SFNTDirectory tempDir;
sl@0: 
sl@0:     fread(&tempDir, sizeof tempDir, 1, fFile);
sl@0: 
sl@0:     le_int32 dirSize = sizeof tempDir + ((SWAPW(tempDir.numTables) - ANY_NUMBER) * sizeof(DirectoryEntry));
sl@0:     const LETag headTag = LE_HEAD_TABLE_TAG;
sl@0:     const LETag hheaTag = LE_HHEA_TABLE_TAG;
sl@0:     const HEADTable *headTable = NULL;
sl@0:     const HHEATable *hheaTable = NULL;
sl@0:     le_uint16 numTables = 0;
sl@0:     
sl@0:     //coverity[incorrect_multiplication]
sl@0:     //coverity[buffer_alloc]
sl@0:     // dirSize is The actually sizoe of fDirectory which indeed contains more data thant SFNTDirectory defined.
sl@0:     fDirectory = (const SFNTDirectory *) LE_NEW_ARRAY(char, dirSize);
sl@0:    
sl@0:     if (fDirectory == NULL) 
sl@0:     	{
sl@0:         status = LE_MEMORY_ALLOCATION_ERROR;
sl@0:         goto error_exit;
sl@0:     	}
sl@0: 
sl@0:     fseek(fFile, 0L, SEEK_SET);
sl@0:     fread((void *) fDirectory, sizeof(char), dirSize, fFile);
sl@0: 
sl@0:     //
sl@0:     // We calculate these numbers 'cause some fonts
sl@0:     // have bogus values for them in the directory header.
sl@0:     //
sl@0:     numTables = SWAPW(fDirectory->numTables);
sl@0:     fDirPower = 1 << highBit(numTables);
sl@0:     fDirExtra = numTables - fDirPower;
sl@0: 
sl@0:     // read unitsPerEm from 'head' table
sl@0:     headTable = (const HEADTable *) readFontTable(headTag);
sl@0: 
sl@0:     if (headTable == NULL) 
sl@0:     	{
sl@0:         status = LE_MISSING_FONT_TABLE_ERROR;
sl@0:         goto error_exit;
sl@0:     	}
sl@0: 
sl@0:     fUnitsPerEM = SWAPW(headTable->unitsPerEm);
sl@0:     deleteTable(headTable);
sl@0: 
sl@0:     hheaTable = (HHEATable *) readFontTable(hheaTag);
sl@0: 
sl@0:     if (hheaTable == NULL) 
sl@0:     	{
sl@0:         status = LE_MISSING_FONT_TABLE_ERROR;
sl@0:         goto error_exit;
sl@0:     	}
sl@0: 
sl@0:     fAscent  = (le_int32) yUnitsToPoints((float) SWAPW(hheaTable->ascent));
sl@0:     fDescent = (le_int32) yUnitsToPoints((float) SWAPW(hheaTable->descent));
sl@0:     fLeading = (le_int32) yUnitsToPoints((float) SWAPW(hheaTable->lineGap));
sl@0: 
sl@0:     fNumLongHorMetrics = SWAPW(hheaTable->numOfLongHorMetrics);
sl@0: 
sl@0:     deleteTable((void *) hheaTable);
sl@0: 
sl@0:     fCMAPMapper = findUnicodeMapper();
sl@0: 
sl@0:     if (fCMAPMapper == NULL) 
sl@0:     	{
sl@0:         status = LE_MISSING_FONT_TABLE_ERROR;
sl@0:         goto error_exit;
sl@0:     	}
sl@0: 
sl@0: 	return;
sl@0: 	
sl@0: error_exit:
sl@0:     fclose(fFile);
sl@0:     fFile = NULL;
sl@0:     return;
sl@0: 	}
sl@0: 
sl@0: SymbianFontInstance::~SymbianFontInstance()
sl@0: 	{
sl@0: 	if (fFile != NULL) 
sl@0: 		{
sl@0: 		fclose(fFile);
sl@0: 		deleteTable(fHMTXTable);
sl@0: 		delete fCMAPMapper;
sl@0: 		LE_DELETE_ARRAY(fDirectory);
sl@0: 		}
sl@0: 	};
sl@0: 
sl@0: #else
sl@0:  	/* read the font directly.  This is used if rasterizers do not support
sl@0:  	   the trueTypeExtensionInterface */
sl@0:  
sl@0: SymbianFontInstance::SymbianFontInstance(CBitmapFont *aBitmapFont,
sl@0:  	LEErrorCode &status)
sl@0:  	: fFile(NULL), fUnitsPerEM(0), fAscent(0), fDescent(0), fLeading(0),
sl@0:        fDirectory(NULL), fCMAPMapper(NULL), fHMTXTable(0), fNumGlyphs(0),
sl@0:        fNumLongHorMetrics(0), iFont(aBitmapFont)
sl@0:  
sl@0:  	{
sl@0:  	// get the OpenFont details
sl@0:  	if (!aBitmapFont->IsOpenFont())
sl@0:  		{
sl@0:  		// the font supplied was not a Openfont so ..
sl@0:  		status = LE_ILLEGAL_ARGUMENT_ERROR;
sl@0:  		return;
sl@0:  		}
sl@0:  
sl@0:  	COpenFont* font = aBitmapFont->OpenFont();
sl@0:  
sl@0:  	// get the extended interface
sl@0:  	TAny* ext = 0;
sl@0:  	font->ExtendedInterface(KUidOpenFontShapingExtension, ext);
sl@0:  	iExtensionInterface = reinterpret_cast<MOpenFontShapingExtension*>(ext);
sl@0:  
sl@0:  	// do not use the true type interface
sl@0:  	iTrueTypeExtensionInterface = 0;
sl@0:  
sl@0:  	if (!iExtensionInterface  )
sl@0:  		{
sl@0:  		// this rasterizer does not support the required interface
sl@0:  		// so do not bother to shape
sl@0:  		status = LE_ILLEGAL_ARGUMENT_ERROR;
sl@0:  		return ;
sl@0:  		}
sl@0:  
sl@0:  	// get the font file name from the COpenFontFile in the COpenFont
sl@0:  	TBuf8<KMaxFileName> fontFileName;
sl@0:  	fontFileName.Copy(font->File()->FileName());
sl@0:  	fontFileName.ZeroTerminate();
sl@0:  
sl@0:  	/* get the font metrics via the rasterizer */
sl@0:  	MOpenFontShapingExtension::TExtensionFontMetrics fontMetrics;
sl@0:  	iExtensionInterface->GetExtensionFontMetrics(fontMetrics);
sl@0:    
sl@0:     /* The number of font design units per em. */
sl@0:    	fUnitsPerEM	= fontMetrics.iUnitsPerEm;
sl@0:    
sl@0:    	/* The size of the font's em square in pixels. */
sl@0:    	fXPixelsPerEm	= fontMetrics.iXPixelsPerEm;
sl@0:    	fYPixelsPerEm	= fontMetrics.iYPixelsPerEm;
sl@0:    
sl@0:    	/* Scaling factors, pixels per font unit. */
sl@0:    	fDeviceScaleY = fontMetrics.iYScaleFactor;
sl@0:    	fDeviceScaleX = fontMetrics.iXScaleFactor;
sl@0:    
sl@0:    	// open the font file
sl@0:    	fFile = fopen( (char *)fontFileName.Ptr(), "rb");
sl@0:    	if (fFile == 0)
sl@0:    		{
sl@0:    		status = LE_FONT_FILE_NOT_FOUND_ERROR;
sl@0:    		return;
sl@0:    		}
sl@0:    
sl@0:     // read in the directory
sl@0:     SFNTDirectory tempDir;
sl@0:    
sl@0:     fread(&tempDir, sizeof tempDir, 1, fFile);
sl@0:    
sl@0:     le_int32 dirSize = sizeof tempDir + ((SWAPW(tempDir.numTables) - ANY_NUMBER) * sizeof(DirectoryEntry));
sl@0:     const LETag headTag = LE_HEAD_TABLE_TAG;
sl@0:     const LETag hheaTag = LE_HHEA_TABLE_TAG;
sl@0:     const HEADTable *headTable = NULL;
sl@0:     const HHEATable *hheaTable = NULL;
sl@0:     le_uint16 numTables = 0;
sl@0:     
sl@0:     fDirectory = (const SFNTDirectory *) LE_NEW_ARRAY(char, dirSize);
sl@0:     
sl@0:     if (fDirectory == NULL) 
sl@0:     	{
sl@0:         status = LE_MEMORY_ALLOCATION_ERROR;
sl@0:         goto error_exit;
sl@0:     	}
sl@0:    
sl@0:     fseek(fFile, 0L, SEEK_SET);
sl@0:     fread((void *) fDirectory, sizeof(char), dirSize, fFile);
sl@0:    
sl@0:     //
sl@0:     // We calculate these numbers 'cause some fonts
sl@0:     // have bogus values for them in the directory header.
sl@0:     //
sl@0:     numTables = SWAPW(fDirectory->numTables);
sl@0:     fDirPower = 1 << highBit(numTables);
sl@0:     fDirExtra = numTables - fDirPower;
sl@0:    
sl@0:     // read unitsPerEm from 'head' table
sl@0:     headTable = (const HEADTable *) readFontTable(headTag);
sl@0:    
sl@0:     if (headTable == NULL) 
sl@0:     	{
sl@0:         status = LE_MISSING_FONT_TABLE_ERROR;
sl@0:         goto error_exit;
sl@0:     	}
sl@0:    
sl@0:     fUnitsPerEM = SWAPW(headTable->unitsPerEm);
sl@0:     deleteTable(headTable);
sl@0:    
sl@0:     hheaTable = (HHEATable *) readFontTable(hheaTag);
sl@0:    
sl@0:     if (hheaTable == NULL) 
sl@0:     	{
sl@0:         status = LE_MISSING_FONT_TABLE_ERROR;
sl@0:         goto error_exit;
sl@0:     	}
sl@0:    
sl@0:     fAscent  = (le_int32) yUnitsToPoints((float) SWAPW(hheaTable->ascent));
sl@0:     fDescent = (le_int32) yUnitsToPoints((float) SWAPW(hheaTable->descent));
sl@0:     fLeading = (le_int32) yUnitsToPoints((float) SWAPW(hheaTable->lineGap));
sl@0:    
sl@0:     fNumLongHorMetrics = SWAPW(hheaTable->numOfLongHorMetrics);
sl@0:    
sl@0:     deleteTable((void *) hheaTable);
sl@0:    
sl@0:     fCMAPMapper = findUnicodeMapper();
sl@0:    
sl@0:     if (fCMAPMapper == NULL) 
sl@0:     	{
sl@0:         status = LE_MISSING_FONT_TABLE_ERROR;
sl@0:         goto error_exit;
sl@0:     	}
sl@0:    
sl@0: 	return;
sl@0:    	
sl@0:    	error_exit:
sl@0:        fclose(fFile);
sl@0:        fFile = NULL;
sl@0:        return;
sl@0:    	}
sl@0:    
sl@0: SymbianFontInstance::~SymbianFontInstance()
sl@0:    	{
sl@0:        if (fFile != NULL) 
sl@0:        	{
sl@0:            fclose(fFile);
sl@0:        
sl@0:            deleteTable(fHMTXTable);
sl@0:    
sl@0:            delete fCMAPMapper;
sl@0:    
sl@0:            LE_DELETE_ARRAY(fDirectory);
sl@0:        	}
sl@0:    	};
sl@0:    
sl@0: #endif
sl@0:    
sl@0: 
sl@0: void SymbianFontInstance::deleteTable(const void *table) const
sl@0: 	{
sl@0: 	LE_DELETE_ARRAY(table);
sl@0: 	}
sl@0: 
sl@0: const DirectoryEntry *SymbianFontInstance::findTable(LETag tag) const
sl@0: 	{
sl@0:     if (fDirectory != NULL) 
sl@0:     	{
sl@0:         le_uint16 table = 0;
sl@0:         le_uint16 probe = fDirPower;
sl@0: 
sl@0:         if (SWAPL(fDirectory->tableDirectory[fDirExtra].tag) <= tag) 
sl@0:         	{
sl@0:             table = fDirExtra;
sl@0:         	}
sl@0: 
sl@0:         while (probe > (1 << 0)) 
sl@0:         	{
sl@0:             probe >>= 1;
sl@0: 
sl@0:             if (SWAPL(fDirectory->tableDirectory[table + probe].tag) <= tag) 
sl@0:             	{
sl@0:                 table += probe;
sl@0:             	}
sl@0:         	}
sl@0: 
sl@0:         if (SWAPL(fDirectory->tableDirectory[table].tag) == tag) 
sl@0:         	{
sl@0:             return &fDirectory->tableDirectory[table];
sl@0:         	}
sl@0:     	}
sl@0: 
sl@0:     return NULL;
sl@0: 	}
sl@0: 
sl@0: const void *SymbianFontInstance::readTable(LETag aTag, le_uint32 *aLength) const
sl@0: 	{
sl@0: 	void *table = NULL;
sl@0: 
sl@0: 	/* If the current rasteriser supports the TrueTypeExtensionInterface 
sl@0: 	   use it to access the true Type tables */
sl@0: 	if (iTrueTypeExtensionInterface)
sl@0: 		{
sl@0: 		TInt error;
sl@0: 		TInt length;
sl@0: 		TAny * trueTypeTable = iTrueTypeExtensionInterface->
sl@0: 			GetTrueTypeTable(error, aTag, &length);
sl@0: 
sl@0: 	 	if (!trueTypeTable) 
sl@0: 			{
sl@0: 			*aLength = 0;
sl@0: 			return 0;
sl@0: 			}
sl@0: 
sl@0: 		if (aLength)
sl@0: 			*aLength = length;
sl@0: 
sl@0: 		// allocate some memory for the table & copy table into it
sl@0: 		table = LE_NEW_ARRAY(char, length);
sl@0: 		if (table) 
sl@0: 			{
sl@0: 			// copy the table from the rasteriser
sl@0: 			Mem::Copy(table, (char *) trueTypeTable, length);
sl@0: 			}
sl@0: 	  
sl@0: 	  	iTrueTypeExtensionInterface->ReleaseTrueTypeTable(trueTypeTable);
sl@0:   	  	}
sl@0:   	else
sl@0:   	  	{
sl@0: 		// old method, read the table directly
sl@0: 		const DirectoryEntry *entry = findTable(aTag);
sl@0: 
sl@0: 		if (entry == NULL) 
sl@0: 			{
sl@0: 			if (aLength)
sl@0: 				*aLength = 0;
sl@0: 			return NULL;
sl@0: 			}
sl@0: 
sl@0: 		TInt length = SWAPL(entry->length);
sl@0: 		if (aLength)
sl@0: 			*aLength = length;
sl@0: 
sl@0: 		table = LE_NEW_ARRAY(char, length);
sl@0: 
sl@0: 		if (table != NULL) 
sl@0: 			{
sl@0: 			fseek(fFile, SWAPL(entry->offset), SEEK_SET);
sl@0: 			fread(table, sizeof(char), length, fFile);
sl@0: 			}
sl@0: 		}
sl@0: 	    
sl@0:     return table;
sl@0:     }
sl@0:     
sl@0: const void *SymbianFontInstance::getFontTable(LETag tableTag) const
sl@0: 	{
sl@0: 	if (iTrueTypeExtensionInterface)
sl@0: 		{
sl@0: 		TInt error;
sl@0: 		return iTrueTypeExtensionInterface->GetTrueTypeTable(error, tableTag, 0);
sl@0: 		}
sl@0: 	return FontTableCache::find(tableTag);
sl@0: 	}
sl@0: 
sl@0: const void *SymbianFontInstance::readFontTable(LETag tableTag) const
sl@0: 	{
sl@0: 	return readTable(tableTag, 0);
sl@0: 	}
sl@0: 
sl@0: CMAPMapper *SymbianFontInstance::findUnicodeMapper()
sl@0: 	{
sl@0: 	LETag cmapTag = LE_CMAP_TABLE_TAG;
sl@0: 	const CMAPTable *cmap = (CMAPTable *) readFontTable(cmapTag);
sl@0: 
sl@0: 	return cmap ? CMAPMapper::createUnicodeMapper(cmap) : NULL;
sl@0: 	}
sl@0: 
sl@0: void SymbianFontInstance::getGlyphAdvance(
sl@0: 	LEGlyphID aGlyph, LEPoint &aAdvance) const
sl@0: 	{
sl@0: 	TInt glyph = LE_GET_GLYPH(aGlyph) | 0x80000000;
sl@0: 	TOpenFontCharMetrics metrics;
sl@0: 	const TUint8* bitmap = 0;
sl@0: 	
sl@0: 	// If an FFFF glyph code is received, avoid trying to rasterize it as there
sl@0: 	// is no character data associated with FFFF.
sl@0: 	// This will avoid the overhead of trying to rasterize it.
sl@0: 	if (glyph == 0x8000FFFF)
sl@0: 		{
sl@0: 		aAdvance.fX = 0;
sl@0: 		aAdvance.fY = 0;
sl@0: 		return;
sl@0: 		}
sl@0: 		
sl@0: 	if (!iFont->GetCharacterData(iSessionHandle, glyph, metrics, bitmap))
sl@0: 		{
sl@0: 		// Glyph not yet rasterized; rasterize it ourselves
sl@0: 		iFont->Rasterize(iSessionHandle, glyph, 0);
sl@0: 		if (!iFont->GetCharacterData(iSessionHandle, glyph, metrics, bitmap))
sl@0: 			{
sl@0: 			aAdvance.fX = 0;
sl@0: 			aAdvance.fY = 0;
sl@0: 			return;
sl@0: 			}
sl@0: 		}
sl@0: 	aAdvance.fX = metrics.HorizAdvance();
sl@0: 	aAdvance.fY = 0;
sl@0: 	return;
sl@0: 	}
sl@0: 
sl@0: le_bool SymbianFontInstance::getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const
sl@0: 	{
sl@0: 	TReal x;
sl@0: 	TReal y;
sl@0: 	if (!iExtensionInterface->GlyphPointInHintedPixels(
sl@0: 		glyph, pointNumber, x, y ))
sl@0: 		return FALSE;
sl@0: 	point.fX = x;
sl@0: 	point.fY = y;
sl@0: 	return TRUE;
sl@0: 	}
sl@0: 
sl@0: void SymbianFontInstance::transformFunits(float xFunits, float yFunits, LEPoint &pixels) const
sl@0: 	{
sl@0: 	pixels.fX = xFunits / fUnitsPerEM * fXPixelsPerEm;
sl@0: 	pixels.fY = yFunits / fUnitsPerEM * fYPixelsPerEm;
sl@0: 	}
sl@0: 
sl@0: float SymbianFontInstance::xUnitsToPoints(float xUnits) const
sl@0: 	{
sl@0: 	// Seems like this function should have been called xUnitsToPixels?!
sl@0: 	return xUnits / fUnitsPerEM * fXPixelsPerEm;
sl@0: 	}
sl@0: 
sl@0: float SymbianFontInstance::yUnitsToPoints(float yUnits) const
sl@0: 	{
sl@0: 	// Seems like this function should have been called yUnitsToPixels?!
sl@0: 	return yUnits / fUnitsPerEM * fYPixelsPerEm;
sl@0: 	}
sl@0: 
sl@0: float SymbianFontInstance::getXPixelsPerEm() const
sl@0: 	{
sl@0: 	return fXPixelsPerEm;
sl@0: 	}
sl@0: 
sl@0: float SymbianFontInstance::getYPixelsPerEm() const
sl@0: 	{
sl@0: 	return fYPixelsPerEm;
sl@0: 	}
sl@0: 
sl@0: float SymbianFontInstance::getScaleFactorX() const
sl@0: 	{
sl@0: 	return fDeviceScaleX;
sl@0: 	}
sl@0: 
sl@0: float SymbianFontInstance::getScaleFactorY() const
sl@0: 	{
sl@0: 	return fDeviceScaleY;
sl@0: 	}