diff -r 969102054596 -r 414d4b727fd9 graphicsdeviceinterface/gdi/sgdi/FONT.CPP --- a/graphicsdeviceinterface/gdi/sgdi/FONT.CPP Wed Aug 25 08:17:25 2010 +0300 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1810 +0,0 @@ -// Copyright (c) 1998-2010 Nokia Corporation and/or its subsidiary(-ies). -// All rights reserved. -// This component and the accompanying materials are made available -// under the terms of "Eclipse Public License v1.0" -// which accompanies this distribution, and is available -// at the URL "http://www.eclipse.org/legal/epl-v10.html". -// -// Initial Contributors: -// Nokia Corporation - initial contribution. -// -// Contributors: -// -// Description: -// - -#include -#include -#include "GlyphSel.h" -#include "FontThai.h" -#include "FontArabic.h" -#include "FontIndic.h" -#include "GDIPANIC.h" -#include "glyphsample.h" -#include "gdiinline.inl" -#include "gdistructs.h" -#include "gdiconsts.h" -#include "gdiplatapi.h" - -/** - Names holds the types & data associated with the glyph selection - algorithm in CFont::GetCharacterPosition(). -@internalComponent -*/ -namespace GlyphSelection - { - - typedef TBool (*ProcessFunc)(TGlyphSelectionState& aGss, RShapeInfo&); - - /** - This structure defines the fields present in each row of the GlyphTable - datat table below. - @internalComponent - */ - struct TTableEntry - { - TUint iLow; - TUint iHigh; - ProcessFunc iProcessFunc; - }; - - /** - This table encodes the Unicode character ranges and the glyph selector - classes to be used for each character range when processing characters - into glyph clusters in CFont::GetCharacterPosition(). - New glyph selection classes must make sure they are listed in this - table to ensure they are invoked as required. - A '0' iProcessFunc entry tells the algorithm to skip the character. - @internalComponent - */ - static const TTableEntry Table[] = - { - // iLow, iHigh, iProcessFunc - { 0x0000, 0x00AC, GlyphSelector_Default::Process}, - { 0x00AD, 0x00AD, GlyphSelector_SoftHyphen::Process}, - { 0x00AE, 0x05FF, GlyphSelector_Default::Process}, - { 0x0600, 0x06FF, GlyphSelector_Arabic::Process}, - { 0x0700, 0x08FF, GlyphSelector_Default::Process}, - { 0x0900, 0x0970, GlyphSelector_Devanagari::Process}, - { 0x0980, 0x09FF, GlyphSelector_Bengali::Process}, - { 0x0A00, 0x0A7F, GlyphSelector_Gurmukhi::Process}, - { 0x0A80, 0x0AFF, GlyphSelector_Gujarati::Process}, - { 0x0B80, 0x0BFF, GlyphSelector_Tamil::Process}, - { 0x0C00, 0x0C7F, GlyphSelector_Telugu::Process}, - { 0x0C80, 0x0CFF, GlyphSelector_Kannada::Process}, - { 0x0D00, 0x0D7F, GlyphSelector_Malayalam::Process}, - { 0x0D80, 0x0DFF, GlyphSelector_Default::Process}, - { 0x0E00, 0x0E32, GlyphSelector_Thai::Process}, - { 0x0E33, 0x0E33, GlyphSelector_ThaiSaraAm::Process}, - { 0x0E34, 0x0E7F, GlyphSelector_Thai::Process}, - { 0x0E80, 0x200B, GlyphSelector_Default::Process}, - { 0x200C, 0x200F, 0}, - { 0x2010, 0x2029, GlyphSelector_Default::Process}, - { 0x202A, 0x202E, 0}, - { 0x202F, 0xFFFD, GlyphSelector_Default::Process}, - { 0xFFFE, 0xFFFF, 0}, - { 0x10000, 0x10FFFF, GlyphSelector_Default::Process}, - {0xFFFFFFFF,0xFFFFFFFF, 0} - }; - } - -/** Find appropriate processor function for the given character. -@param aChar Character for processing. -@return processor function or 0 if the character is to be skipped. -@internalComponent */ -GlyphSelection::ProcessFunc CharacterToProcessFunction(TInt aChar) - { - for (const GlyphSelection::TTableEntry* glyphSel = GlyphSelection::Table; - glyphSel->iLow != 0xFFFFFFFF; glyphSel++) - { - if ((glyphSel->iLow <= aChar) && (aChar <= glyphSel->iHigh)) - return glyphSel->iProcessFunc; - } - return 0; - } - -/** -@internalTechnology For use by TFontStyle/TOpenFontSpec. -*/ -EXPORT_C TBool FontEffect::IsEffectOn(TEffect aEffect, TUint32 aFontEffect) - { - return aEffect & aFontEffect; - } - -/** -@internalTechnology For use by TFontStyle/TOpenFontSpec. -*/ -EXPORT_C void FontEffect::SetEffect(TEffect aEffect, TBool aOn, TUint32& aFontEffect) - { - if (aOn) - aFontEffect |= aEffect; - else - aFontEffect &= ~aEffect; - } - - -// -// TFontStyle -// - -/** Default C++ constructor. */ -EXPORT_C TFontStyle::TFontStyle(): - iFlags(0), iReserved1(0), iReserved2(0) - {} - - -/** Constructs a TFontStyle object with the specified attributes. -@param aPost The posture attribute. -@param aStrWgt The stroke weight attribute. -@param aPrintPos The print position attribute. */ -EXPORT_C TFontStyle::TFontStyle(TFontPosture aPostr,TFontStrokeWeight aWgt,TFontPrintPosition aPos): - iFlags(0), iReserved1(0), iReserved2(0) - { - if (aPostr == EPostureItalic) - { - iFlags |= EItalic; - } - if (aWgt == EStrokeWeightBold) - { - iFlags |= EBold; - } - if (aPos == EPrintPosSuperscript) - { - iFlags |= ESuper; - } - else if (aPos == EPrintPosSubscript) - { - iFlags |= ESub; - } - } - - -EXPORT_C void TFontStyle::InternalizeL(RReadStream& aStream) -/** Internalises a font style from a read stream. - -The presence of this function means that the standard templated operator>>() -(defined in s32strm.h) is available to internalise objects of this class. - -@param aStream The stream from which the font style is to be internalised -@leave KErrNoMemory If there is a problem reading from the stream. -If internalisation causes an out of memory error. */ - { - iFlags = aStream.ReadUint32L(); - } - - -EXPORT_C void TFontStyle::ExternalizeL(RWriteStream& aStream) const -/** Externalises the font style to a write stream. - -The presence of this function means that the standard templated operator<<() -(defined in s32strm.h) is available to externalise objects of this class. - -@param aStream The stream to which the font style is to be externalised. -@leave KErrNoMemory This function may leave, if the write action causes the -stream's resources to be exhausted. */ - { - aStream.WriteUint32L(iFlags); - } - - -EXPORT_C TFontPosture TFontStyle::Posture() const -/** Gets the posture attribute. - -@return The font style's posture. */ - { - if(iFlags&EItalic) return(EPostureItalic); - return(EPostureUpright); - } - - -EXPORT_C TFontStrokeWeight TFontStyle::StrokeWeight() const -/** Gets the stroke weight attribute. - -@return The font style's stroke weight. */ - { - if(iFlags&EBold) return(EStrokeWeightBold); - return(EStrokeWeightNormal); - } - - -EXPORT_C TFontPrintPosition TFontStyle::PrintPosition() const -/** Gets the print position attribute. - -@return The font style's print position. */ - { - if((iFlags&ESuper) && !(iFlags&ESub)) return(EPrintPosSuperscript); - else if((iFlags&ESub) && !(iFlags&ESuper)) return(EPrintPosSubscript); - return(EPrintPosNormal); - } - - -EXPORT_C void TFontStyle::SetPosture(TFontPosture aPosture) -/** Sets the posture attribute. - -@param aPosture The posture to be set. */ - { - if(aPosture==EPostureItalic) iFlags|=EItalic; - else iFlags&=~EItalic; - } - - -EXPORT_C void TFontStyle::SetStrokeWeight(TFontStrokeWeight aStrokeWeight) -/** Sets the stroke weight attribute. - -@param aStrokeWeight The stroke weight to be set. */ - { - if(aStrokeWeight==EStrokeWeightBold) iFlags|=EBold; - else iFlags&=~EBold; - } - - -EXPORT_C void TFontStyle::SetPrintPosition(TFontPrintPosition aPrintPosition) -/** Sets the print position attribute. - -@param aPrintPosition The print position to be set. */ - { - switch(aPrintPosition) - { - case EPrintPosSuperscript: - { - iFlags|=ESuper; - iFlags&=~ESub; - break; - } - case EPrintPosSubscript: - { - iFlags&=~ESuper; - iFlags|=ESub; - break; - } - default: - { - iFlags&=~ESuper; - iFlags&=~ESub; - } - } - } - -/** Gets the font effects flags. -@publishedAll -@released -@return The font effects flags. -@see TFontStyle::SetEffects() -*/ -EXPORT_C TUint32 TFontStyle::Effects() const - { - return 0xFFF0 & iFlags; - } - -/** Checks if a font effect is on. -@publishedAll -@released -@return True represents the specified font effect is on, otherwise off. -@param aEffect The font effect to be checked. -@see TFontStyle::SetEffects() -*/ -EXPORT_C TBool TFontStyle::IsEffectOn(FontEffect::TEffect aEffect) const - { - return FontEffect::IsEffectOn(aEffect, iFlags); - } - -/** Sets the font effects flags. -@publishedAll -@released -@param aEffect The font effects flags to be set. -@see TFontStyle::Effects() -*/ -EXPORT_C void TFontStyle::SetEffects(TUint32 aEffects) - { - iFlags &= 0xFFFF000F; - iFlags |= 0xFFF0 & aEffects; - } - -/** Sets a font effect to the given state. -@publishedAll -@released -@param aEffect The font effect to be set. -@param aOn True represents on, otherwise off. -@see TFontStyle::IsEffectOn() -*/ -EXPORT_C void TFontStyle::SetEffects(FontEffect::TEffect aEffect, TBool aOn) - { - FontEffect::SetEffect(aEffect, aOn, iFlags); - } - -/** Compares a font style for equality. -@publishedAll -@released -@param aFontStyle The font style to be compared with this font style. -@return ETrue, if this TFontStyle is equal to aFontStyle, EFalse, otherwise. -*/ -EXPORT_C TBool TFontStyle::operator==(const TFontStyle& aFontStyle) const - { - return iFlags == aFontStyle.iFlags; - } - -// -// TFontSpec -// -EXPORT_C TFontSpec::TFontSpec(): - iTypeface(), - iHeight(0), - iFontStyle() -/** Default constructor. - -The object's font style is set to the default: EPostureUpright, EStrokeWeightNormal, -and EPrintPosNormal. */ - {} - - -EXPORT_C TFontSpec::TFontSpec(const TDesC& aTypefaceName,TInt aHeight): - iTypeface(), - iHeight(aHeight), - iFontStyle(EPostureUpright,EStrokeWeightNormal,EPrintPosNormal) -/** Constructs a TFontSpec object with the specified typeface and height. - -The object's font style is set to the default: EPostureUpright, EStrokeWeightNormal, -and EPrintPosNormal. - -@param aTypefaceName The name of the typeface (e.g. "Roman"). It should be no - longer than KMaxTypefaceNameLength characters in length. -@param aHeight The height of the typeface, in twips. -@panic GDI 6, if aTypefaceName is more than KMaxTypefaceNameLength characters long. -*/ - { - iTypeface.SetName(aTypefaceName); - } - - -EXPORT_C TBool TFontSpec::operator==(const TFontSpec& aFontSpec) const -/** Compares this font specification with another. -@param aFontSpec The font specification to be compared with this one. -@return ETrue, if the TFontSpecs are identical, EFalse otherwise. -*/ - { - return - iHeight == aFontSpec.iHeight && - iFontStyle == aFontSpec.iFontStyle && - iTypeface == aFontSpec.iTypeface; - } - - -EXPORT_C void TFontSpec::InternalizeL(RReadStream& aStream) -/** Internalises a font specification from a read stream. - -The presence of this function means that the standard templated operator>>() -(defined in s32strm.h) is available to internalise objects of this class. - -@param aStream The stream from which the font specification is to be internalised. -@leave KErrNoMemory If internalisation causes an out of memory error. */ - { - iTypeface.InternalizeL(aStream); - iHeight=aStream.ReadUint16L(); - iFontStyle.InternalizeL(aStream); - } - - -EXPORT_C void TFontSpec::ExternalizeL(RWriteStream& aStream) const -/** Externalises the font specification to a write stream. - -The presence of this function means that the standard templated operator<<() -(defined in s32strm.h) is available to externalise objects of this class. - -@param aStream The stream to which the font specification is to be externalised - -@leave KErrNoMemory If the write action causes the stream's resources to be -exhausted. */ - { - iTypeface.ExternalizeL(aStream); - aStream.WriteUint16L(iHeight); - iFontStyle.ExternalizeL(aStream); - } - -EXPORT_C void TFontSpec::SetScriptTypeForMetrics(TLanguage aLanguage) -/** Specifies the script with which font metrics calculation will be based on. -@param aLanguage The language used to derive the required script. -@publishedAll -@released -*/ - { - iTypeface.SetScriptTypeForMetrics(aLanguage); - } - -EXPORT_C TInt TFontSpec::ScriptTypeForMetrics() const -/** Returns the script with which font metrics calculation will be based on. -@internalTechnology -*/ - { - return iTypeface.ScriptTypeForMetrics(); - } - -// -// TTypeface -// -static const TInt KTTypefaceBitsNumAttrib = 3; -static const TInt KTTypefaceBitsNumScript = 4; -static const TInt KTTypefaceMaskAttrib = (1 << KTTypefaceBitsNumAttrib) - 1; -static const TInt KTTypefaceMaskScript = ((1 << KTTypefaceBitsNumScript) - 1) << KTTypefaceBitsNumAttrib; -EXPORT_C TTypeface::TTypeface(): - iName(), - iFlags(0) -/** Default C++ constructor. */ - {} - -/** -@internalComponent -*/ -void TTypeface::ResetAttributes() - { - iFlags &= KTTypefaceMaskScript; - } - -/** -@internalComponent -*/ -void TTypeface::ResetScriptType() - { - iFlags &= KTTypefaceMaskAttrib; - } - -EXPORT_C void TTypeface::InternalizeL(RReadStream& aStream) -/** Internalises a typeface from a read stream. - -The presence of this function means that the standard templated operator>>() -(defined in s32strm.h) is available to internalise objects of this class. - -@param aStream Stream from which the typeface is to be internalised. */ - { - TBuf tempname; - aStream >> tempname; - new(&iName) TBufC(tempname); - iFlags = aStream.ReadInt8L(); - } - - -EXPORT_C void TTypeface::ExternalizeL(RWriteStream& aStream) const -/** Externalises a typeface to a write stream. - -The presence of this function means that the standard templated operator<<() -(defined in s32strm.h) is available to externalise objects of this class. - -@param aStream The stream to which the typeface is to be externalised. */ - { - aStream << iName; - aStream.WriteInt8L(static_cast(iFlags)); - } - - -EXPORT_C TBool TTypeface::operator==(const TTypeface& aTypeface) const -/** Compares two typefaces for equality. - -@param aTypeface The typeface to be compared with. -@return ETrue, if this TTypeface is equal to aTypeface, otherwise EFalse. */ - { - return - iFlags == aTypeface.iFlags && - iName == aTypeface.iName; - } - -EXPORT_C void TTypeface::SetAttributes(TInt aAttributes) -/** Set the combination of attributes for this typeface. - -@param aAttributes A bitmap defining the combination of attributes. */ - { - ResetAttributes(); - iFlags |= KTTypefaceMaskAttrib & aAttributes & (EProportional | ESerif | ESymbol); - } - - -EXPORT_C void TTypeface::SetIsProportional(TBool aIsProportional) -/** Sets the typeface's proportional attribute. - -@param aIsProportional ETrue if the typeface is a proportional typeface, otherwise -EFalse. */ - { - if (aIsProportional) - { - iFlags |= EProportional; - } - else - { - iFlags &= ~EProportional; - } - } - - -EXPORT_C void TTypeface::SetIsSerif(TBool aIsSerif) -/** Sets the typeface's serif attribute. - -@param aIsSerif ETrue if the typeface is a serif typeface, otherwise EFalse. */ - { - if (aIsSerif) - { - iFlags |= ESerif; - } - else - { - iFlags &= ~ESerif; - } - } - - -EXPORT_C void TTypeface::SetIsSymbol(TBool aIsSymbol) -/** Sets the typeface's symbol attribute. - -@param aIsSymbol ETrue if the typeface is a symbol typeface, otherwise EFalse. */ - { - if (aIsSymbol) - { - iFlags |= ESymbol; - } - else - { - iFlags &= ~ESymbol; - } - } - - -EXPORT_C TInt TTypeface::Attributes() const -/** Gets the combination of attributes of the typeface. - -@return The combination of attributes of the typeface. */ - { - return KTTypefaceMaskAttrib & iFlags; - } - - -EXPORT_C TBool TTypeface::IsProportional() const -/** Gets the typeface's proportional attribute. - -@return ETrue if the typeface is proportional, EFalse otherwise. */ - { - return KTTypefaceMaskAttrib & iFlags & EProportional; - } - - -EXPORT_C TBool TTypeface::IsSerif() const -/** Gets the typeface's serif attribute. - -@return ETrue if the typeface is a serif typeface, EFalse otherwise */ - { - return KTTypefaceMaskAttrib & iFlags & ESerif; - } - - -EXPORT_C TBool TTypeface::IsSymbol() const -/** Gets the typeface's symbol attribute. - -@return ETrue if the typeface is a symbol typeface, EFalse otherwise */ - { - return KTTypefaceMaskAttrib & iFlags & ESymbol; - } - - -/** Specifies the script with which font metrics calculation will be based on. -@param aLanguage The language used to derive the required script. -@internalTechnology -*/ -EXPORT_C void TTypeface::SetScriptTypeForMetrics(TLanguage aLanguage) - { - SetScriptTypeForMetrics(GlyphSample::TLanguage2TScript(aLanguage)); - } - -/** Specifies the script with which font metrics calculation will be based on. -@param aScript The script. -@internalTechnology -*/ -EXPORT_C void TTypeface::SetScriptTypeForMetrics(TInt aScript) - { - ResetScriptType(); - iFlags |= KTTypefaceMaskScript & (aScript << KTTypefaceBitsNumAttrib); - } - -/** Gets the script with which font metrics calculation will be based on. -@return The script. -@internalTechnology -*/ -EXPORT_C TInt TTypeface::ScriptTypeForMetrics() const - { - return (KTTypefaceMaskScript & iFlags) >> KTTypefaceBitsNumAttrib; - } - -/** -Sets the name of the typeface. This method should be used rather than -directly accessing the iName public member. -@param aName The name of the typeface (e.g. "Roman"). It should be no - longer than KMaxTypefaceNameLength characters in length. -@panic GDI 6, if aName is more than KMaxTypefaceNameLength characters - long. -*/ -EXPORT_C void TTypeface::SetName(const TDesC& aName) - { - GDI_ASSERT_ALWAYS(aName.Length() <= KMaxTypefaceNameLength, EGdiPanic_TypefaceNameOverflow); - iName=aName; - } - -/** -Returns the name of the typeface. -@return The name of the typeface. -*/ -EXPORT_C const TDesC& TTypeface::Name() const - { - return iName; - } - - -// -// CFont -// - -/** Default destructor. */ -EXPORT_C CFont::~CFont() - {} - -_LIT(KGdiZeroCharacter,"0"); - -/** Gets the width of the zero character of this font in pixels. - -This function is provided as the "0" character is roughly the average width -of the characters of any font. - -@return The width of the "0" character, in pixels. */ -EXPORT_C TInt CFont::WidthZeroInPixels() const - { - return(TextWidthInPixels(KGdiZeroCharacter)); - } - - -/** Gets the font descent in pixels. -It is defined to be HeightInPixels() minus AscentInPixels(). -Note that this deprecated function is replaced by the new @c FontMaxDescent() -or in some cases @c FontStandardDescent(). - -@return The font descent in pixels. -@see FontStandardDescent() -@see FontMaxDescent() -@deprecated */ -EXPORT_C TInt CFont::DoDescentInPixels() const - { - return HeightInPixels() - AscentInPixels(); - } - - -/** Checks to see if the pen position needs to be included in the bounds -calculation for purposes of considering side-bearings in the line break point - -@param aInput The input block. Contains the check flag and maxbounds. -@param aPenPos The current value of the pen position. -@param aBoundsBR Bottom-right bounds value. -@param aBoundsTL Top-left bounds value. -@return Whether or not MaxBounds has been exceeded -*/ -LOCAL_C TBool BoundsExceeded(const CFont::TMeasureTextInput& aInput, - const TInt& aPenPos, TInt& aBoundsBR, TInt& aBoundsTL) - { - if (aInput.iFlags & CFont::TMeasureTextInput::EFIncludePenPositionInBoundsCheck) - { - if (aInput.iFlags & CFont::TMeasureTextInput::EFVisualOrderRightToLeft) - { - aBoundsTL = Min(aBoundsTL, aPenPos); - } - else - { - aBoundsBR = Max(aBoundsBR, aPenPos); - } - } - return (aBoundsBR - aBoundsTL > aInput.iMaxBounds); - } - - -/** Text measurement function. - -This is a powerful text measurement function underlying all the -other text measurement functions. It takes optional input and output -parameter blocks, which may be null, and returns the advance -width (change in pen position when drawn horizontally) of the text, or the advance -height, if the text is drawn vertically. - -Some of the functions that can be performed using this -function are listed below. Many of them are used by the Text Views -API to do its typographic layout. -- Get the advance width or advance height (return value). -The advance width is the amount by which the pen advances when drawing -the text horizontally, while the advance height is the amount by which -the pen advances when drawing the text vertically. -- Measure some text in context, so that shaping behaviour -(e.g. in Arabic) can be affected by what comes before and after the -text. Do this using TMeasureTextInput::iStartInputChar and -TMeasureTextInput::iEndInputChar to tell the function where to start and end -in the supplied descriptor. -- Determine how much text fits a given size by setting -TMeasureTextInput::iMaxAdvance or TMeasureTextInput::iMaxBounds. -- Specify letter spacing and word spacing using TMeasureTextInput::iCharJustNum, -TMeasureTextInput::iCharJustExcess, -TMeasureTextInput::iWordJustNum and -TMeasureTextInput::iWordJustExcess. -- Get the number of characters drawn in TMeasureTextOutput::iChars -when applying the various constraints in TMeasureTextInput. -- Get the number of glyphs drawn in TMeasureTextOutput::iGlyphs. -- Get the number of groups (formed by ligation or diacritic placement) in -TMeasureTextOutput::iGroups. Groups are units of cursor -movement: the cursor hops over a character-plus-accent group or an -Arabic or other ligature in one go. -- Get the number of word spaces in TMeasureTextOutput::iSpaces. -- Get the bounds of the inked-in pixels in TMeasureTextOutput::iBounds. -- Get the size of the biggest glyph that would be drawn in TMeasureTextOutput::iMaxGlyphSize. - -@param aText The text to be measured. -@param aInput The input block. This may be NULL. -@param aOutput The output block. This may be NULL. -@return The advance width if the text is drawn horizontally or the advance -height if the text is drawn vertically. - -@panic GDI 1 In debug builds only, if TMeasureTextInput::iStartInputChar is negative. -*/ -EXPORT_C TInt CFont::MeasureText(const TDesC& aText,const TMeasureTextInput* aInput,TMeasureTextOutput* aOutput) const - { - TMeasureTextInput input; - if (aInput) - input = *aInput; - if (aOutput) - { - Mem::FillZ(aOutput,sizeof(*aOutput)); - aOutput->iChars = input.iStartInputChar; - } - TPositionParam param; - param.iDirection = input.iDirection; - - TBool vertical = param.iDirection == EVertical; - TBool penMovesLeft = EFalse; - if (input.iFlags & TMeasureTextInput::EFVisualOrderRightToLeft) - { - if (!vertical) - penMovesLeft = ETrue; - param.iFlags |= TPositionParam::EFLogicalOrder; - } - else if (!(input.iFlags & TMeasureTextInput::EFVisualOrder)) - param.iFlags |= TPositionParam::EFLogicalOrder; - - - param.iText.Set(aText); - - int advance = 0; - int groups = 0; - int spaces = 0; - param.iPosInText = input.iStartInputChar; - int end_char = Min(aText.Length(),input.iEndInputChar); - TRect bounds; - // Total advance if pen is moving left. Positive. - TInt rightToLeftAdvance = 0; - // Shaping information of the text - RShapeInfo shapeInfo; - while (param.iPosInText < end_char) - { - if (!GetCharacterPosition2(param, shapeInfo)) - { - if (aOutput) - aOutput->iChars = param.iPosInText; - continue; - } - - int new_advance = vertical ? param.iPen.iY : param.iPen.iX; - if (input.iCharJustExcess != 0) - new_advance += CGraphicsContext::JustificationInPixels(input.iCharJustExcess,input.iCharJustNum,groups,1); - groups++; - // Allow justification to occur at spaces - if (param.iOutput[0].iCode == 0x0020) - { - if (input.iWordJustExcess != 0) - new_advance += CGraphicsContext::JustificationInPixels(input.iWordJustExcess,input.iWordJustNum,spaces,1); - spaces++; - } - if (vertical) - param.iPen.iY = new_advance; - else - param.iPen.iX = new_advance; - - if (penMovesLeft) - { - // If the pen is moving left, we will begin each cluster at (0,0) - // and shift the bounds to the right to compensate. - bounds.iTl.iX += param.iPen.iX; - bounds.iBr.iX += param.iPen.iX; - bounds.iTl.iY += param.iPen.iY; - bounds.iBr.iY += param.iPen.iY; - rightToLeftAdvance += param.iPen.iX; - new_advance = rightToLeftAdvance; - param.iPen.iX = 0; - param.iPen.iY = 0; - } - - if (aInput || aOutput) - { - const TPositionParam::TOutput* output = param.iOutput; - for (int i = 0; i < param.iOutputGlyphs; i++, output++) - { - //if (!output->iBounds.IsEmpty()) -- optimized to: - if (output->iBounds.iTl.iX != output->iBounds.iBr.iX - || output->iBounds.iTl.iY != output->iBounds.iBr.iY) - { - if (aOutput) - { - // increase iMaxGlyphSize if either dimension smaller than - // current glyph - TInt boundsDim = output->iBounds.iBr.iX - output->iBounds.iTl.iX; - aOutput->iMaxGlyphSize.iWidth = aOutput->iMaxGlyphSize.iWidth < boundsDim? - boundsDim : aOutput->iMaxGlyphSize.iWidth; - boundsDim = output->iBounds.iBr.iY - output->iBounds.iTl.iY; - aOutput->iMaxGlyphSize.iHeight = aOutput->iMaxGlyphSize.iHeight < boundsDim? - boundsDim : aOutput->iMaxGlyphSize.iHeight; - } - //bounds.BoundingRect(output->iBounds); -- optimized to: - if (output->iBounds.iTl.iX < bounds.iTl.iX) - bounds.iTl.iX = output->iBounds.iTl.iX; - if (bounds.iBr.iX < output->iBounds.iBr.iX) - bounds.iBr.iX = output->iBounds.iBr.iX; - if (output->iBounds.iTl.iY < bounds.iTl.iY) - bounds.iTl.iY = output->iBounds.iTl.iY; - if (bounds.iBr.iY < output->iBounds.iBr.iY) - bounds.iBr.iY = output->iBounds.iBr.iY; - } - } - - // Would any limits be exceeded by adding this group? - if (param.iPosInText > end_char) - break; - if (new_advance > input.iMaxAdvance) - break; - if (vertical) - { - if (BoundsExceeded(input, param.iPen.iY, bounds.iBr.iY, bounds.iTl.iY)) - break; - } - else - { - if (BoundsExceeded(input, param.iPen.iX, bounds.iBr.iX, bounds.iTl.iX)) - break; - } - - if (aOutput) - { - aOutput->iChars = param.iPosInText; // should this not be aOutput->iChars = param.iPosInText - input.iShartInputChar;? - aOutput->iGlyphs += param.iOutputGlyphs; - aOutput->iGroups = groups; - aOutput->iSpaces = spaces; - aOutput->iBounds = bounds; - } - } - - advance = new_advance; - } - if(shapeInfo.IsOpen()) - shapeInfo.Close(); - return advance; - } - -// These 3 functions should probably be moved to E32/Euser as part of TChar or -// similar as there seem to be several local copies of similar functions in -// various OS modules so we should remove duplication - -TUint16 HighSurrogate(TUint aCode) - { - GDI_ASSERT_DEBUG(aCode > 0xFFFF, EGdiPanic_InvalidInputParam); - return STATIC_CAST(TUint16, 0xD7C0 + (aCode >> 10)); - } - -TUint16 LowSurrogate(TUint aCode) - { - GDI_ASSERT_DEBUG(aCode > 0xFFFF, EGdiPanic_InvalidInputParam); - return STATIC_CAST(TUint16, 0xDC00 | (aCode & 0x3FF)); - } - -TUint CombineSurrogates(TUint aHighSurrogate, TUint aLowSurrogate) - { - GDI_ASSERT_DEBUG((0xD800 == (aHighSurrogate & 0xF800)), EGdiPanic_InvalidInputParam); - GDI_ASSERT_DEBUG((0xD800 == (aHighSurrogate & 0xFC00)), EGdiPanic_InvalidInputParam); - GDI_ASSERT_DEBUG((0xDC00 == (aLowSurrogate & 0xFC00)), EGdiPanic_InvalidInputParam); - return ((aHighSurrogate - 0xD7F7) << 10) + aLowSurrogate; - } - - -/** Overridable function innards of GetCharacterPosition and -GetCharacterPosition2. It is generally not useful to override this function. -@publishedAll -@see GetCharacterPosition -@see GetCharacterPosition2 -*/ -EXPORT_C TBool CFont::DoGetCharacterPosition(TPositionParam& aParam) const - { - RShapeInfo shapeInfo; - TBool r = GetCharacterPosition2(aParam, shapeInfo); - if (shapeInfo.IsOpen()) - shapeInfo.Close(); - return r; - } - -// Find the script (and hence the correct process function) that any punctuation or digit may belong to -LOCAL_C GlyphSelection::ProcessFunc FindContextualProcessFunc(RShapeInfo& aShapeInfo, const TGlyphSelectionState aGss) - { - GlyphSelection::ProcessFunc processFunc = CharacterToProcessFunction(aGss.iCodeChar); - GlyphSelection::ProcessFunc contextProcessFunc = (GlyphSelection::ProcessFunc)aShapeInfo.GetContext(); - - // If context or prevCode is NULL, use processFunc, - // else use function of context or prevCode - if ((aGss.iCodeChar.IsDigit() || aGss.iCodeChar.IsPunctuation()) && !QuoteOrBracketPair(aGss.iCodeChar) && processFunc!=GlyphSelector_SoftHyphen::Process) - { - // If context is not set, check the previous char for context. - if (contextProcessFunc == NULL) - { - if (aGss.iParam.iPosInText > 0) - { - TChar prevCode = aGss.iText.Get(-1); - GlyphSelection::ProcessFunc prevProcessFunc = CharacterToProcessFunction(prevCode); - if (prevProcessFunc != NULL && (prevCode.IsAlpha() || prevProcessFunc != GlyphSelector_Default::Process)) - { - aShapeInfo.SetContext((TAny *)prevProcessFunc); - return prevProcessFunc; - } - } - } - else - return contextProcessFunc; - - return processFunc; - } - - // set the context with current processFunc only if current char is not ignored for context. - if (processFunc != NULL && (aGss.iCodeChar.IsAlpha() || processFunc != GlyphSelector_Default::Process)) - aShapeInfo.SetContext((TAny *)processFunc); - return processFunc; - } - -/** Takes Unicode text and produces the glyph cluster for the first character -in that text plus any combining mark characters, or for the first indic -syllable. It is responsible for contextual glyph selection, ligature creation -and diacritic placement. - -@param aParam - The input/output parameter of the text/glyph data for the algorithm. -@param aShapeInfo - The function will cache "shaped" text (e.g. complex scripts such as - Devanagari) here. aShapeInfo must be freshly-constructed or closed for each - new piece of text in aParam.iText. If aParam.iText is unchanged between - calls, aShapeInfo should be passed back in unchanged as well. -@return - ETrue if glyphs for supplied text have been produced, EFalse in failure. -@see CFont::TPositionParam -@publishedAll -@released */ -EXPORT_C TBool CFont::GetCharacterPosition2(TPositionParam& aParam, RShapeInfo& aShapeInfo) const - { - GDI_ASSERT_DEBUG(aParam.iPosInText>=0, EGdiPanic_InvalidInputParam); - GDI_ASSERT_DEBUG(aParam.iText.Ptr(), EGdiPanic_InvalidInputParam); - - aParam.iOutputGlyphs = 0; - TInt textLen = aParam.iText.Length(); - TBool outputOk = ETrue; - TPoint penCopy = aParam.iPen; - - // Verify input parameters are sane - if (aParam.iPosInText >= textLen) - return EFalse; - - // Setup glyph selection algorithm data - TUtf32Iterator textIter(aParam.iText.Ptr(), aParam.iText.Ptr()+textLen, aParam.iPosInText); - if (textIter.AtEnd()) - { - aParam.iPosInText = textIter.LengthToStart(); - return outputOk; - } - - // Process each character in the text in turn until we reach the end of - // the iterator, the next base (non-mark/combining) character or reach - // the limit in a glyph cluster. - GlyphSelection::ProcessFunc firstProcessFn = 0; - TGlyphSelectionState gss(textIter, this, aParam); - do - { - // Retrieve character info for processing. - gss.iCodePt = gss.iCodeChar = textIter.Get(); - gss.iCombCls = gss.iCodeChar.GetCombiningClass(); - gss.iCats = gss.iCodeChar.GetCategory(); - gss.iClusterState = TGlyphSelectionState::EGClusterNotComplete; - gss.iPen = TGlyphSelectionState::EPenAdvance_No; - - // Find the correct processesing function for the script being used. - // If gss.iCodePt is a strongly directional character, then simply map it in TTableEntry Table[] - // and use the returned process function pointer. - // If gss.iCodePt is a punctuation or a digit, then use a context character in the text (if - // available) to find the contextual script being rendered and use its process function pointer. - GlyphSelection::ProcessFunc processFn = FindContextualProcessFunc(aShapeInfo, gss); - - if (!firstProcessFn) - firstProcessFn = processFn; - - if (processFn) - { - if (firstProcessFn == processFn) - outputOk = processFn(gss, aShapeInfo); - else - break; - } - else - { - // Table entry blank, unicode char to be skipped - outputOk = ETrue; - textIter.Next(); - gss.iClusterState = - (!textIter.AtEnd() && - ((textIter.Get().GetCategory() & 0xF0) - == TChar::EMarkGroup)) ? - TGlyphSelectionState::EGClusterNotComplete : TGlyphSelectionState::EGClusterComplete; - } - - // Abort if no class was available to process the character or if - // processing failed. - if (!outputOk) - { - aParam.iPosInText = textIter.LengthToStart(); - return outputOk; - } - - // Did the glyph selector that processed the character want the - // pen to advance? - if (gss.iPen == TGlyphSelectionState::EPenAdvance_Yes) - { - aParam.iPen.iX += gss.iAdvance.iWidth; - aParam.iPen.iY += gss.iAdvance.iHeight; - gss.iPen = TGlyphSelectionState::EPenAdvance_No; - } - - // Here we assume the Process() methods have advanced the iterator as - // they consume characters they handle so that it now points to the - // character to process next time around the loop. - } - while (!textIter.AtEnd() // We still have more text to process - && (gss.iClusterState == TGlyphSelectionState::EGClusterNotComplete) // Glyph cluster !complete - && (aParam.iOutputGlyphs < TPositionParam::EMaxOutputGlyphs)); // Room for another glyph entry - - // If a complete glyph cluster has been identified then we should try to - // compose it as fully as possible. Obviously, if it only contains one - // character then it is already fully composed so we can ignore it. - // Skip this if any language-specific processing has taken place. - if (gss.iGlyphPostCombine == TGlyphSelectionState::EGPostCombine_Yes - && gss.iClusterState == TGlyphSelectionState::EGClusterComplete) - { - // Leave room to handle surrogates - Decompose() outputs UTF-16 - // The max that can come out of the previous stage is TPositionParam::EMaxOutputGlyphs - // long with only one base char at the start. Even if that base char decomposed to the - // max it could only be MaxOutputGlyphs long, giving a total of (2 * MaxOutputGlyphs)-1 - // Conceivably the use of surrogates throughout could double that when converting to UTF-16 - TBuf decomposeArray; - TBool success = ETrue; - // Go through the glyph cluster one char at a time - for (TInt i = 0; i < aParam.iOutputGlyphs; i++) - { - TChar singleChar(aParam.iOutput[i].iCode); - // If first character try to decompose it otherwise just take the character - TBool decomposed = EFalse; - TPtrC16 decomposition; - if (i == 0) - decomposed = singleChar.Decompose(decomposition); - if (decomposed) - { // Pick up the sequence of characters - decomposeArray.Append(decomposition); - } - else - { // Keep the original character - if (singleChar > 0xFFFF) - { // Above the BMP so we need a surrogate pair for UTF-16 - // This calculation really ought to go into a separate routine - probably part of TChar - decomposeArray.Append(HighSurrogate(singleChar)); - decomposeArray.Append(LowSurrogate(singleChar)); - } - else - { // It's not a surrogate so we just need to cast it down (since it's safe) - decomposeArray.Append(singleChar); - } - } - // Guard against bad input overflowing the array and causing a panic - if (decomposeArray.Length() > (TPositionParam::EMaxOutputGlyphs * 4) - 2) - { // too long to be a viable composition so don't try - success = EFalse; - break; - } - } - TUint composedChar = 0; - TOpenFontCharMetrics metrics; - TPositionParam::TOutput output; - TSize advance; // gets initialized to 0,0 - if (success) - { - //Now try and compose the string to a single character - success = TChar::Compose(composedChar, decomposeArray); - } - if (success) - { - // if single char is not in font or can't get char metrics for it - // N.B. This will probably always return metrics because if the - // char is not in the font this will usually return the substitute - // "missing" glyph (and its metrics). There should be a function to - // really tell you if a glyph is in the font - but there isn't. - if (GetCharacterData(composedChar, metrics, output.iBitmap, output.iBitmapSize) == CFont::ENoCharacterData) - success = EFalse; - } - if (success) - { - // We should replace the glyph cluster made from multiple chars - // with the correct single char and fix up the rest of the output - // parameters as well - output.iCode = composedChar; - // Set the glyph's bounds and record pen advancement. - if (aParam.iDirection == CFont::EVertical) - { - metrics.GetVertBounds(output.iBounds); - advance.iHeight = metrics.VertAdvance(); - } - else - { - metrics.GetHorizBounds(output.iBounds); - advance.iWidth = metrics.HorizAdvance(); - } - // Adjust the glyph's bounding box to offset it from the pen - // position (origin of drawing). For speed increment directly. - output.iBounds.iTl.iX += penCopy.iX; - output.iBounds.iBr.iX += penCopy.iX; - output.iBounds.iTl.iY += penCopy.iY; - output.iBounds.iBr.iY += penCopy.iY; - // Set penCopy, the copy of aParam.iPen that we made - penCopy.iX += advance.iWidth; - penCopy.iY += advance.iHeight; - // Overwrite the original output parameters for the glyph cluster - // with the values for the single composed character - aParam.iOutput[0] = output; - aParam.iOutputGlyphs = 1; - aParam.iPen = penCopy; - } - } - - // Exit routine with result and increment position in text to - // where we reached during processing to avoid any caller loops from - // infinite execution. - aParam.iPosInText = textIter.LengthToStart(); - return outputOk; - } - -/** Gets the character metrics for a character. - -@param aCode The character code. -@param aMetrics On return, contains the character bitmap. -@param aBitmap On return, this points to NULL. -@param aBitmapSize On return, this has a size of (0,0). -@return ECharacterWidthOnly -*/ -EXPORT_C CFont::TCharacterDataAvailability CFont::DoGetCharacterData(TUint aCode,TOpenFontCharMetrics& aMetrics, - const TUint8*& aBinaryData,TSize& aBitmapSize) const - { - int width = CharWidthInPixels(aCode); - aMetrics.SetHorizAdvance(width); - aBinaryData = NULL; - // For speed set to 0 directly rather than call SetSize() - aBitmapSize.iWidth = 0; - aBitmapSize.iHeight = 0; - - /* - Set the other metrics using the width and font metrics. - This allows derived classes that don't override this function, like CInfoFont, - to give usable results for TextWidthInPixels and MeasureText. - */ - aMetrics.SetWidth(width); - int height = HeightInPixels(); - aMetrics.SetHeight(height); - aMetrics.SetVertAdvance(height); - aMetrics.SetHorizBearingX(0); - aMetrics.SetHorizBearingY(AscentInPixels()); - aMetrics.SetVertBearingX(0); - aMetrics.SetVertBearingY(0); - - return CFont::ECharacterWidthOnly; - } - - -/** Determines if aLeftCharacter and aRightCharacter affect each other's -contextual glyph form if placed next to each other. If either character -is a combining character, EFalse will be returned, which is not generally -useful information. Pass in base characters ignoring intervening combining -characters. -@param aLeftCharacter Unicode code for the character that stands on the left. -@param aRightCharacter Unicode code for the character that stands on the right. -@return EFalse if the characters do not affect the contextual glyphs that are -be chosen when the two are rendered together, compared to being separated -(for example by a space). */ -EXPORT_C TBool CFont::CharactersJoin(TInt aLeftCharacter, TInt aRightCharacter) - { - return GlyphSelector_Arabic::CharactersJoin(aLeftCharacter, aRightCharacter); - } - -/** API extension system that enables the caller to access a particular API -extension function. N.B. Any overload of this function in a derived class -should call its immediate parent implementation for any extension function Uid -that it does not recognize and handle. -@param aInterfaceId UID of the required extension function -@param aParam Pointer to an arbitrary parameter block that can be used to -provide and/or return information to/from the particular extension function, -defaults to NULL. -@return Integer return value from extension function -@internalTechnology -@released -*/ -EXPORT_C TInt CFont::DoExtendedFunction(TUid aFunctionId, TAny* /* aParam */) const - { - if (KFontCapitalAscent == aFunctionId || - KFontMaxAscent == aFunctionId) - { - return AscentInPixels(); - } - else if (KFontStandardDescent == aFunctionId || - KFontMaxDescent == aFunctionId) - { - return DescentInPixels(); - } - else if (KFontLineGap == aFunctionId) - { // 1.2 of em height (rounded) is reasonable approximation of interline gap - return (HeightInPixels() * 12 + 5) / 10; - } - return KErrNotFound; - } - -EXPORT_C TUid CFont::TypeUid() const - { - return DoTypeUid(); - } - -EXPORT_C TInt CFont::HeightInPixels() const - { - return DoHeightInPixels(); - } - -EXPORT_C TInt CFont::AscentInPixels() const - { - return DoAscentInPixels(); - } - -EXPORT_C TInt CFont::DescentInPixels() const - { - return DoDescentInPixels(); - } - -EXPORT_C TInt CFont::CharWidthInPixels(TChar aChar) const - { - return DoCharWidthInPixels(aChar); - } - -EXPORT_C TInt CFont::TextWidthInPixels(const TDesC& aText) const - { - return DoTextWidthInPixels(aText); - } - -EXPORT_C TInt CFont::BaselineOffsetInPixels() const - { - return DoBaselineOffsetInPixels(); - } - -EXPORT_C TInt CFont::TextCount(const TDesC& aText,TInt aWidthInPixels) const - { - return DoTextCount(aText, aWidthInPixels); - } - -EXPORT_C TInt CFont::TextCount(const TDesC& aText, TInt aWidthInPixels, TInt& aExcessWidthInPixels) const - { - return DoTextCount(aText, aWidthInPixels, aExcessWidthInPixels); - } - -EXPORT_C TInt CFont::MaxCharWidthInPixels() const - { - return DoMaxCharWidthInPixels(); - } - -EXPORT_C TInt CFont::MaxNormalCharWidthInPixels() const - { - return DoMaxNormalCharWidthInPixels(); - } - -EXPORT_C TFontSpec CFont::FontSpecInTwips() const - { - return DoFontSpecInTwips(); - } - -/** Gets the character metrics for a character. - -@param aCode The character code. -@param aMetrics On return, contains the character bitmap. -@param aBitmap On return, this points to NULL. -@param aBitmapSize On return, this has a size of (0,0). -@return ECharacterWidthOnly -*/ -EXPORT_C CFont::TCharacterDataAvailability CFont::GetCharacterData(TUint aCode, TOpenFontCharMetrics& aMetrics, const TUint8*& aBitmap, TSize& aBitmapSize) const - { - return DoGetCharacterData(aCode, aMetrics, aBitmap, aBitmapSize); - } - -/** Transforms one cluster of characters (base character plus combining marks, -ligature or indic syllable) into one cluster of glyphs together with their -positions. Repeated calls of this function (for the same input text) are -considerably slower than repeated calls of GetCharacterPosition2 for Indic text -(such as Hindi), as GetCharacterPosition2 can cache information between calls. -@param aParam Input and output parameters -@return True for success -@see GetCharacterPosition2 -@publishedAll */ -EXPORT_C TBool CFont::GetCharacterPosition(TPositionParam& aParam) const - { - return DoGetCharacterPosition(aParam); - } - -/** Enables the caller to access a particular API -extension function. N.B. Any overload of this function in a derived class -should call its immediate parent implementation for any extension function UID -that it does not recognize and handle. -@param aFunctionId UID of the required extension function -@param aParam Pointer to an arbitrary parameter block that can be used to -provide and/or return information to/from the particular extension function, -defaults to NULL. -@return Integer return value from extension function -*/ -EXPORT_C TInt CFont::ExtendedFunction(TUid aFunctionId, TAny* aParam) const - { - return DoExtendedFunction(aFunctionId, aParam); - } - -EXPORT_C TInt CFont::TextWidthInPixels(const TDesC& aText,const TMeasureTextInput* aParam) const - { - TTextWidthInternal context; - TTextWidthInternal* contextPtr = &context; - contextPtr->iText.Set(aText); - contextPtr->iParam.iStartInputChar = aParam->iStartInputChar; - contextPtr->iParam.iEndInputChar = aParam->iEndInputChar; - return DoExtendedFunction(KTextInContextWidthInPixelsUid, (TAny*)contextPtr); - } - -/** -Maps TLanguage to TScript. - -EScriptOther represents languages not yet supported in KTScript2GlyphSample. -This array does not handle ELangNone and ELangMaximum to save storage space. -*/ -const TInt GlyphSample::KTLanguage2TScript[] = - { - EScriptNone, // 00 ELangTest - EScriptLatin, // 01 ELangEnglish - EScriptLatin, // 02 ELangFrench - EScriptLatin, // 03 ELangGerman - EScriptLatin, // 04 ELangSpanish - EScriptLatin, // 05 ELangItalian - EScriptLatin, // 06 ELangSwedish - EScriptLatin, // 07 ELangDanish - EScriptLatin, // 08 ELangNorwegian - EScriptLatin, // 09 ELangFinnish - EScriptLatin, // 10 ELangAmerican - EScriptLatin, // 11 ELangSwissFrench - EScriptLatin, // 12 ELangSwissGerman - EScriptLatin, // 13 ELangPortuguese - EScriptLatin, // 14 ELangTurkish - EScriptLatin, // 15 ELangIcelandic - EScriptCyrillic, // 16 ELangRussian - EScriptLatin, // 17 ELangHungarian - EScriptLatin, // 18 ELangDutch - EScriptLatin, // 19 ELangBelgianFlemish - EScriptLatin, // 20 ELangAustralian - EScriptLatin, // 21 ELangBelgianFrench - EScriptLatin, // 22 ELangAustrian - EScriptLatin, // 23 ELangNewZealand - EScriptLatin, // 24 ELangInternationalFrench - EScriptLatin, // 25 ELangCzech - EScriptLatin, // 26 ELangSlovak - EScriptLatin, // 27 ELangPolish - EScriptLatin, // 28 ELangSlovenian - EScriptHanIdeographs, // 29 ELangTaiwanChinese - EScriptHanIdeographs, // 30 ELangHongKongChinese - EScriptHanIdeographs, // 31 ELangPrcChinese - EScriptHanIdeographs, // 32 ELangJapanese - EScriptThai, // 33 ELangThai - EScriptLatin, // 34 ELangAfrikaans - EScriptLatin, // 35 ELangAlbanian - EScriptOther, // 36 ELangAmharic - EScriptArabic, // 37 ELangArabic - EScriptOther, // 38 ELangArmenian - EScriptOther, // 39 ELangTagalog - EScriptCyrillic, // 40 ELangBelarussian - EScriptOther, // 41 ELangBengali - EScriptCyrillic, // 42 ELangBulgarian - EScriptOther, // 43 ELangBurmese - EScriptLatin, // 44 ELangCatalan - EScriptLatin, // 45 ELangCroatian - EScriptLatin, // 46 ELangCanadianEnglish - EScriptLatin, // 47 ELangInternationalEnglish - EScriptLatin, // 48 ELangSouthAfricanEnglish - EScriptLatin, // 49 ELangEstonian - EScriptArabic, // 50 ELangFarsi - EScriptLatin, // 51 ELangCanadianFrench - EScriptLatin, // 52 ELangScotsGaelic - EScriptOther, // 53 ELangGeorgian - EScriptGreek, // 54 ELangGreek - EScriptGreek, // 55 ELangCyprusGreek - EScriptOther, // 56 ELangGujarati - EScriptHebrew, // 57 ELangHebrew - EScriptDevanagari, // 58 ELangHindi - EScriptLatin, // 59 ELangIndonesian - EScriptLatin, // 60 ELangIrish - EScriptLatin, // 61 ELangSwissItalian - EScriptOther, // 62 ELangKannada - EScriptCyrillic, // 63 ELangKazakh - EScriptOther, // 64 ELangKhmer - EScriptHanIdeographs, // 65 ELangKorean - EScriptOther, // 66 ELangLao - EScriptLatin, // 67 ELangLatvian - EScriptLatin, // 68 ELangLithuanian - EScriptCyrillic, // 69 ELangMacedonian - EScriptLatin, // 70 ELangMalay - EScriptOther, // 71 ELangMalayalam - EScriptDevanagari, // 72 ELangMarathi - EScriptLatin, // 73 ELangMoldavian - EScriptOther, // 74 ELangMongolian - EScriptLatin, // 75 ELangNorwegianNynorsk - EScriptLatin, // 76 ELangBrazilianPortuguese - EScriptOther, // 77 ELangPunjabi - EScriptLatin, // 78 ELangRomanian - EScriptCyrillic, // 79 ELangSerbian - EScriptOther, // 80 ELangSinhalese - EScriptLatin, // 81 ELangSomali - EScriptLatin, // 82 ELangInternationalSpanish - EScriptLatin, // 83 ELangLatinAmericanSpanish - EScriptLatin, // 84 ELangSwahili - EScriptLatin, // 85 ELangFinlandSwedish - EScriptNone, // 86 ELangReserved1 - EScriptOther, // 87 ELangTamil - EScriptOther, // 88 ELangTelugu - EScriptOther, // 89 ELangTibetan - EScriptOther, // 90 ELangTigrinya - EScriptLatin, // 91 ELangCyprusTurkish - EScriptCyrillic, // 92 ELangTurkmen - EScriptCyrillic, // 93 ELangUkrainian - EScriptArabic, // 94 ELangUrdu - EScriptNone, // 95 ELangReserved2 - EScriptLatin, // 96 ELangVietnamese - EScriptLatin, // 97 ELangWelsh - EScriptLatin, // 98 ELangZulu - }; - -/** -Maps TScript to glyph samples. - -The order of samples definition has to follow the script order in TScript. - -Supported scripts Fonts used to experiment/determine glyph samples - -Latin Arial, Times, Century -Greek Ditto -Cyrillic Ditto -Hebrew Aharoni, David, FrankRuehl, Levenim MT, Miriam, Narkisim, Rod -Arabic Andalus, Arabic Transparent, Simplified Arabic, Traditional Arabic -Devanagari Mangal -Thai Angsana New, Browallia, Cordia New, DilleniaUPC, EucrosiaUPC, - FreesiaUPC, IrisUPC, JasmineUPC, KodchiangUPC, LilyUPC -HanIdeographs Chinese : SimSun, SimHei (Simplified) / MingLiU (Traditional) - Japanese: MS Mincho, MS Gothic - Korean : Batang, Gulim -*/ -const TText* const GlyphSample::KTScript2GlyphSample[] = - { - // - // 02 EScriptLatin - // - // 0x00C0 - Ascent : Capital letter A with grave (Latin-1 Supplement) - // 0x013A - Ascent : Small letter l with acute (Latin Extended A) - // 0x1EA2 - Ascent : Capital letter A with hook above (Latin Extended Additional) - // 0x00C7 - Descent: Capital letter C with cedilla (Latin-1 Supplement) - // 0x0163 - Descent: Small letter t with cedilla (Latin Extended A) - // - _S("\x00C0\x013A\x1EA2\x00C7\x0163"), - // - // 03 EScriptGreek - // - // 0x03AA - Ascent : Capital letter iota with dialytika - // 0x03AB - Ascent : Capital letter upsilon with dialytika - // 0x03AE - Descent: Small letter eta with tonos - // 0x03B2 - Descent: Small letter beta - // 0x03C8 - Descent: Small letter psi - // - _S("\x03AA\x03AB\x03AE\x03B2\x03C8"), - // - // 04 EScriptCyrillic - // - // 0x0403 - Ascent : Capital letter gje - // 0x0419 - Ascent : Capital letter short i - // 0x0440 - Descent: Small letter er - // 0x0452 - Descent: Small letter dje - // 0x0458 - Descent: Small letter je - // - _S("\x0403\x0419\x0440\x0452\x0458"), - // - // 05 EScriptHebrew - // - // 0x05BE - Ascent : Punctuation maqaf - // 0x05DC - Ascent : Letter lamed - // 0x05B0 - Descent: Point sheva - // 0x05BD - Descent: Point meteg - // 0x05E7 - Descent: Letter qof - // - _S("\x05BE\x05DC\x05B0\x05BD\x05E7"), - // - // 06 EScriptArabic - // - // 0x0670 - Ascent : Alef above (Arabic) - // 0x0671 - Ascent : Hamzat Wasl on Alef isolated form - // 0x064D - Descent: Kasratan (Arabic) - // 0xFB7B - Descent: Final form of 0686 - // 0xFBF2 - Descent: Final form of 064A - // - //PDEF120737: EScriptArabic value has been changed for this defect & tested using the font file provided by client (i.e. kamelion arabic font). - //The client's font file can't be used for IPR reasons. Thus the test code to demonstrate this defect - //is not added. Also, there was no other font file available that reproduces this defect. - // - _S("\x0670\x0671\x064D\xFB7B\xFBF2"), - // - // 07 EScriptDevanagari - // - // 0x0914 - Ascent : Letter au - // 0x0951 - Ascent : Stress sign udatta - // 0x0941 - Descent: Vowel sign u - // 0x0944 - Descent: Vowel sign rr - // 0x0963 - Descent: Vowel sign vocalic ll - // - _S("\x0914\x0951\x0941\x0944\x0963"), - // - // 08 EScriptThai - // - // 0x0E49 - Ascent : Character mai tho - // 0x0E4B - Ascent : Character mai chattawa - // 0x0E0E - Descent: Character do chada - // 0x0E24 - Descent: Character ru - // 0x0E39 - Descent: Character sara uu - // - _S("\x0E49\x0E4B\x0E0E\x0E24\x0E39"), - // - // 09 EScriptHanIdeographs - // - // 0x1100 - Ascent/Descent: Korean - // 0x4E1C - Ascent/Descent: Chinese Simplified - // 0x5283 - Ascent/Descent: Japanese - // 0x758A - Ascent : Chinese Traditional - // 0x7BEA - Descent: Chinese Traditional - // - _S("\x1100\x4E1C\x5283\x758A\x7BEA"), - }; - -/** -Maps a TLanguage type to the TScript type. -@internalTechnology -@param aLanguage The language. -@return A TInt representing the script, or -EScriptNone if its not defined for aLanguage. -*/ -EXPORT_C TInt GlyphSample::TLanguage2TScript(TLanguage aLanguage) - { - if (ELangNone == aLanguage || ELangMaximum == aLanguage || aLanguage >= (sizeof(KTLanguage2TScript)/sizeof(KTLanguage2TScript[0]))) - { - return EScriptNone; - } - return KTLanguage2TScript[aLanguage]; - } - -/** -Maps a TScript type to some glyph samples which are stored as Unicode. -@internalTechnology -@param aScript The script. -@return A TPtrC pointing to the first glyph sample, -or empty if no samples is defined for aScript. -*/ -EXPORT_C const TPtrC GlyphSample::TScript2GlyphSample(TInt aScript) - { - if (EScriptOther >= aScript) - { - return TPtrC(); - } - // -3 to offset EScriptDefault, EScriptNone and EScriptOther - // being the first three elements in TScript. - return TPtrC(KTScript2GlyphSample[aScript - 3]); - } - - -EXPORT_C RFontTable::RFontTable():iTableContent(0), iLength(0), - iFont(NULL), iTag(0) - { - // a null constructor. - } - -EXPORT_C TInt -RFontTable::Open(CFont& aFont, TUint32 aTag) - { - TGetFontTableParam param; - param.iTag = aTag; - - // remember the parameters, to be used when releasing the font table. - iFont = &aFont; - iTag = aTag; - - TInt ret = aFont.ExtendedFunction(KFontGetFontTable, (TAny *)¶m); - if (KErrNone == ret) - { - iTableContent = (TAny *)param.iContent; - iLength = param.iLength; - } - return ret; - } - -EXPORT_C TInt -RFontTable::TableLength() const - { - return iLength; - } - -EXPORT_C const TUint8* -RFontTable::TableContent() const - { - return (TUint8*)iTableContent; - } - -EXPORT_C void -RFontTable::Close() - { - if (NULL != iFont) - { - (void)iFont->ExtendedFunction(KFontReleaseFontTable, (TAny *)&iTag); - } - iTableContent = 0; - iLength = 0; - iFont = NULL; - iTag = 0; - } - -EXPORT_C -RGlyphOutlineIterator::RGlyphOutlineIterator():iOutlines(0), iLengths(0), - iCursor(-1), iCount(0), iFont(NULL), iCodes(NULL), iHinted(EFalse) - { - // a null constructor. - } - -EXPORT_C TInt -RGlyphOutlineIterator::Open(CFont& aFont, const TUint* aCodes, TInt aCount, TBool aHinted) - { - if (NULL == aCodes || 0 == aCount) - { - return KErrArgument; - } - TGetGlyphOutlineParam param; - iLengths = (TInt *)User::Alloc(sizeof(TInt) * aCount); - if (NULL == iLengths) - { - return KErrNoMemory; - } - iOutlines = (TAny **)User::Alloc(sizeof(TAny *) * aCount); - if (NULL == iOutlines) - { - User::Free(iLengths); - iLengths = NULL; - return KErrNoMemory; - } - - param.iLengths = iLengths; - param.iCount = aCount; - param.iCodes = aCodes; - param.iHinted = aHinted; - param.iOutlines = iOutlines; - - /* information needed in Close() */ - iCodes = (TUint *)User::Alloc(sizeof(TUint) * aCount); - if (NULL == iCodes) - { - User::Free(iLengths); - User::Free(iOutlines); - iLengths = NULL; - iOutlines = NULL; - return KErrNoMemory; - } - Mem::Copy(iCodes, aCodes, aCount*sizeof(TUint)); - iFont = &aFont; - iHinted = aHinted; - iCount = aCount; - - TInt ret = aFont.ExtendedFunction(KFontGetGlyphOutline, (TAny *)¶m); - if (KErrNone != ret) - { - User::Free(iLengths); - User::Free(iOutlines); - User::Free(iCodes); - iLengths = NULL; - iOutlines = NULL; - iCodes = NULL; - iFont = NULL; - } - else - { - iCursor = 0; - } - - return ret; - } - -EXPORT_C const TUint8* -RGlyphOutlineIterator::Outline() const - { - GDI_ASSERT_ALWAYS(iCursor >= 0, EGdiPanic_Unknown); - - if (iLengths[iCursor] < 0) - { - return NULL; - } - else - { - return (const TUint8*)iOutlines[iCursor]; - } - } - -EXPORT_C TInt -RGlyphOutlineIterator::OutlineLength() const - { - GDI_ASSERT_ALWAYS(iCursor >= 0, EGdiPanic_Unknown); - - if (iLengths[iCursor] < 0) - { - return KErrGeneral; - } - else - { - return iLengths[iCursor]; - } - } - -EXPORT_C TInt -RGlyphOutlineIterator::Next() - { - if (iCursor >= 0 && iCursor < iCount-1) - { - ++iCursor; - return KErrNone; - } - else - { - iCursor = -1; - // if the iterator goes beyond the last element [when - // Next() returns KErrNotFound], the next call - // to Outline() or OutlineLength() will panic. - - return KErrNotFound; - } - } - -EXPORT_C void -RGlyphOutlineIterator::Close() - { - TReleaseGlyphOutlineParam param; - param.iCount = iCount; - param.iHinted = iHinted; - param.iCodes = iCodes; - - if (NULL != iFont) - { - iFont->ExtendedFunction(KFontReleaseGlyphOutline, (TAny *)¶m); - } - - iFont = NULL; - iCount = 0; - User::Free(iLengths); - iLengths = NULL; - iCursor = -1; - User::Free(iCodes); - iCodes = NULL; - User::Free(iOutlines); - iOutlines = NULL; - }