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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include "impfont.hxx"
#include "outfont.hxx"
#include "PhysicalFontCollection.hxx"
#include "sallayout.hxx"
#ifdef MACOSX
#include "osx/salinst.h"
#include "osx/saldata.hxx"
// kCTForegroundColorFromContextAttributeName is available on 10.5, but it is "hidden"
#ifndef kCTForegroundColorFromContextAttributeName
extern const CFStringRef kCTForegroundColorFromContextAttributeName;
#endif
#endif
#include "quartz/salgdi.h"
#include "quartz/utils.h"
#include "ctfonts.hxx"
#include <vcl/settings.hxx>
#include "basegfx/polygon/b2dpolygon.hxx"
#include "basegfx/matrix/b2dhommatrix.hxx"
inline double toRadian(int nDegree)
{
return nDegree * (M_PI / 1800.0);
}
CoreTextStyle::CoreTextStyle( const FontSelectPattern& rFSD )
: mpFontData( const_cast<CoreTextFontData*>(static_cast<CoreTextFontData const *>(rFSD.mpFontData)) )
, mfFontStretch( 1.0 )
, mfFontRotation( 0.0 )
, mpStyleDict( NULL )
{
const FontSelectPattern* const pReqFont = &rFSD;
double fScaledFontHeight = pReqFont->mfExactHeight;
// convert font rotation to radian
mfFontRotation = toRadian(pReqFont->mnOrientation);
// dummy matrix so we can use CGAffineTransformConcat() below
CGAffineTransform aMatrix = CGAffineTransformMakeTranslation(0, 0);
// handle font stretching if any
if( (pReqFont->mnWidth != 0) && (pReqFont->mnWidth != pReqFont->mnHeight) )
{
mfFontStretch = (float)pReqFont->mnWidth / pReqFont->mnHeight;
aMatrix = CGAffineTransformConcat(aMatrix, CGAffineTransformMakeScale(mfFontStretch, 1.0F));
}
// create the style object for CoreText font attributes
static const CFIndex nMaxDictSize = 16; // TODO: does this really suffice?
mpStyleDict = CFDictionaryCreateMutable( NULL, nMaxDictSize,
&kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks );
CFBooleanRef pCFVertBool = pReqFont->mbVertical ? kCFBooleanTrue : kCFBooleanFalse;
CFDictionarySetValue( mpStyleDict, kCTVerticalFormsAttributeName, pCFVertBool );
// fake bold
if ( (pReqFont->GetWeight() >= WEIGHT_BOLD) &&
((mpFontData->GetWeight() < WEIGHT_SEMIBOLD) &&
(mpFontData->GetWeight() != WEIGHT_DONTKNOW)) )
{
int nStroke = -10.0;
CFNumberRef rStroke = CFNumberCreate(NULL, kCFNumberSInt32Type, &nStroke);
CFDictionarySetValue(mpStyleDict, kCTStrokeWidthAttributeName, rStroke);
}
// fake italic
if (((pReqFont->GetSlant() == ITALIC_NORMAL) || (pReqFont->GetSlant() == ITALIC_OBLIQUE))
&& (mpFontData->GetSlant() == ITALIC_NONE))
{
aMatrix = CGAffineTransformConcat(aMatrix, CGAffineTransformMake(1, 0, toRadian(120), 1, 0, 0));
}
CTFontDescriptorRef pFontDesc = reinterpret_cast<CTFontDescriptorRef>(mpFontData->GetFontId());
CTFontRef pNewCTFont = CTFontCreateWithFontDescriptor( pFontDesc, fScaledFontHeight, &aMatrix );
CFDictionarySetValue( mpStyleDict, kCTFontAttributeName, pNewCTFont );
CFRelease( pNewCTFont);
// allow delayed setting the font color, i.e. after the text layout
CFDictionarySetValue( mpStyleDict, kCTForegroundColorFromContextAttributeName, kCFBooleanTrue );
#if 0 // LastResort is implicit in CoreText's font cascading
const void* aGFBDescriptors[] = { CTFontDescriptorCreateWithNameAndSize( CFSTR("LastResort"), 0) }; // TODO: use the full GFB list
const int nGfbCount = sizeof(aGFBDescriptors) / sizeof(*aGFBDescriptors);
CFArrayRef pGfbList = CFArrayCreate( NULL, aGFBDescriptors, nGfbCount, &kCFTypeArrayCallBacks);
CFDictionaryAddValue( mpStyleDict, kCTFontCascadeListAttribute, pGfbList);
CFRelease( pGfbList);
#endif
}
CoreTextStyle::~CoreTextStyle( void )
{
if( mpStyleDict )
CFRelease( mpStyleDict );
}
void CoreTextStyle::GetFontMetric( ImplFontMetricData& rMetric ) const
{
// get the matching CoreText font handle
// TODO: is it worth it to cache the CTFontRef in SetFont() and reuse it here?
CTFontRef aCTFontRef = (CTFontRef)CFDictionaryGetValue( mpStyleDict, kCTFontAttributeName );
const CGFloat fAscent = CTFontGetAscent( aCTFontRef );
const CGFloat fCapHeight = CTFontGetCapHeight( aCTFontRef );
rMetric.mnAscent = fAscent;
rMetric.mnDescent = CTFontGetDescent( aCTFontRef );
rMetric.mnExtLeading = CTFontGetLeading( aCTFontRef );
rMetric.mnIntLeading = fAscent - fCapHeight;
// since ImplFontMetricData::mnWidth is only used for stretching/squeezing fonts
// setting this width to the pixel height of the fontsize is good enough
// it also makes the calculation of the stretch factor simple
rMetric.mnWidth = lrint( CTFontGetSize( aCTFontRef ) * mfFontStretch);
// all CoreText fonts are scalable
rMetric.mbScalableFont = true;
rMetric.mbKernableFont = true;
}
bool CoreTextStyle::GetGlyphBoundRect( sal_GlyphId aGlyphId, Rectangle& rRect ) const
{
CGGlyph nCGGlyph = aGlyphId & GF_IDXMASK;
// XXX: this is broken if the glyph came from fallback font
CTFontRef aCTFontRef = (CTFontRef)CFDictionaryGetValue( mpStyleDict, kCTFontAttributeName );
const CTFontOrientation aFontOrientation = kCTFontDefaultOrientation; // TODO: horz/vert
const CGRect aCGRect = CTFontGetBoundingRectsForGlyphs( aCTFontRef, aFontOrientation, &nCGGlyph, NULL, 1 );
rRect.Left() = lrint( aCGRect.origin.x );
rRect.Top() = lrint( aCGRect.origin.y );
rRect.Right() = lrint( aCGRect.origin.x + aCGRect.size.width );
rRect.Bottom() = lrint( aCGRect.origin.y + aCGRect.size.height );
return true;
}
// callbacks from CTFontCreatePathForGlyph+CGPathApply for GetGlyphOutline()
struct GgoData { basegfx::B2DPolygon maPolygon; basegfx::B2DPolyPolygon* mpPolyPoly; };
static void MyCGPathApplierFunc( void* pData, const CGPathElement* pElement )
{
basegfx::B2DPolygon& rPolygon = static_cast<GgoData*>(pData)->maPolygon;
const int nPointCount = rPolygon.count();
switch( pElement->type )
{
case kCGPathElementCloseSubpath:
case kCGPathElementMoveToPoint:
if( nPointCount > 0 ) {
static_cast<GgoData*>(pData)->mpPolyPoly->append( rPolygon );
rPolygon.clear();
}
// fall through for kCGPathElementMoveToPoint:
if( pElement->type != kCGPathElementMoveToPoint )
break;
case kCGPathElementAddLineToPoint:
rPolygon.append( basegfx::B2DPoint( +pElement->points[0].x, -pElement->points[0].y ) );
break;
case kCGPathElementAddCurveToPoint:
rPolygon.append( basegfx::B2DPoint( +pElement->points[2].x, -pElement->points[2].y ) );
rPolygon.setNextControlPoint( nPointCount-1, basegfx::B2DPoint( pElement->points[0].x, -pElement->points[0].y ) );
rPolygon.setPrevControlPoint( nPointCount+0, basegfx::B2DPoint( pElement->points[1].x, -pElement->points[1].y ) );
break;
case kCGPathElementAddQuadCurveToPoint: {
const basegfx::B2DPoint aStartPt = rPolygon.getB2DPoint( nPointCount-1 );
const basegfx::B2DPoint aCtrPt1( (aStartPt.getX() + 2* pElement->points[0].x) / 3.0,
(aStartPt.getY() - 2 * pElement->points[0].y) / 3.0 );
const basegfx::B2DPoint aCtrPt2( (+2 * +pElement->points[0].x + pElement->points[1].x) / 3.0,
(-2 * pElement->points[0].y - pElement->points[1].y) / 3.0 );
rPolygon.append( basegfx::B2DPoint( +pElement->points[1].x, -pElement->points[1].y ) );
rPolygon.setNextControlPoint( nPointCount-1, aCtrPt1 );
rPolygon.setPrevControlPoint( nPointCount+0, aCtrPt2 );
} break;
}
}
bool CoreTextStyle::GetGlyphOutline( sal_GlyphId aGlyphId, basegfx::B2DPolyPolygon& rResult ) const
{
rResult.clear();
CGGlyph nCGGlyph = aGlyphId & GF_IDXMASK;
// XXX: this is broken if the glyph came from fallback font
CTFontRef pCTFont = (CTFontRef)CFDictionaryGetValue( mpStyleDict, kCTFontAttributeName );
CGPathRef xPath = CTFontCreatePathForGlyph( pCTFont, nCGGlyph, NULL );
if (!xPath) {
return false;
}
GgoData aGgoData;
aGgoData.mpPolyPoly = &rResult;
CGPathApply( xPath, (void*)&aGgoData, MyCGPathApplierFunc );
#if 0 // TODO: does OSX ensure that the last polygon is always closed?
const CGPathElement aClosingElement = { kCGPathElementCloseSubpath, NULL };
MyCGPathApplierFunc( (void*)&aGgoData, &aClosingElement );
#endif
CFRelease( xPath );
return true;
}
PhysicalFontFace* CoreTextFontData::Clone( void ) const
{
return new CoreTextFontData( *this);
}
CoreTextStyle* CoreTextFontData::CreateTextStyle( const FontSelectPattern& rFSD ) const
{
return new CoreTextStyle( rFSD);
}
ImplFontEntry* CoreTextFontData::CreateFontInstance( /*const*/ FontSelectPattern& rFSD ) const
{
return new ImplFontEntry( rFSD);
}
int CoreTextFontData::GetFontTable( const char pTagName[5], unsigned char* pResultBuf ) const
{
DBG_ASSERT( pTagName[4]=='\0', "CoreTextFontData::GetFontTable with invalid tagname!\n" );
const CTFontTableTag nTagCode = (pTagName[0]<<24) + (pTagName[1]<<16) + (pTagName[2]<<8) + (pTagName[3]<<0);
// get the raw table length
CTFontDescriptorRef pFontDesc = reinterpret_cast<CTFontDescriptorRef>( GetFontId());
CTFontRef rCTFont = CTFontCreateWithFontDescriptor( pFontDesc, 0.0, NULL);
const uint32_t opts( kCTFontTableOptionNoOptions );
CFDataRef pDataRef = CTFontCopyTable( rCTFont, nTagCode, opts);
CFRelease( rCTFont);
if( !pDataRef)
return 0;
const CFIndex nByteLength = CFDataGetLength( pDataRef);
// get the raw table data if requested
if( pResultBuf && (nByteLength > 0))
{
const CFRange aFullRange = CFRangeMake( 0, nByteLength);
CFDataGetBytes( pDataRef, aFullRange, (UInt8*)pResultBuf);
}
CFRelease( pDataRef);
return (int)nByteLength;
}
ImplDevFontAttributes DevFontFromCTFontDescriptor( CTFontDescriptorRef pFD, bool* bFontEnabled )
{
// all CoreText fonts are device fonts that can rotate just fine
ImplDevFontAttributes rDFA;
rDFA.mbOrientation = true;
rDFA.mbDevice = true;
rDFA.mnQuality = 0;
// reset the font attributes
rDFA.SetFamilyType( FAMILY_DONTKNOW );
rDFA.SetPitch( PITCH_VARIABLE );
rDFA.SetWidthType( WIDTH_NORMAL );
rDFA.SetWeight( WEIGHT_NORMAL );
rDFA.SetItalic( ITALIC_NONE );
rDFA.SetSymbolFlag( false );
// all scalable fonts on this platform are subsettable
rDFA.mbEmbeddable = false;
rDFA.mbSubsettable = true;
// get font name
#ifdef MACOSX
const OUString aUILang = Application::GetSettings().GetUILanguageTag().getLanguage();
CFStringRef pUILang = CFStringCreateWithCharacters( kCFAllocatorDefault, aUILang.getStr(), aUILang.getLength() );
CFStringRef pLang = NULL;
CFStringRef pFamilyName = (CFStringRef)CTFontDescriptorCopyLocalizedAttribute( pFD, kCTFontFamilyNameAttribute, &pLang );
if ( !pLang || ( CFStringCompare( pUILang, pLang, 0 ) != kCFCompareEqualTo ))
{
if(pFamilyName)
{
CFRelease( pFamilyName );
}
pFamilyName = (CFStringRef)CTFontDescriptorCopyAttribute( pFD, kCTFontFamilyNameAttribute );
}
#else
// No "Application" on iOS. And it is unclear whether this code
// snippet will actually ever get invoked on iOS anyway. So just
// use the old code that uses a non-localized font name.
CFStringRef pFamilyName = (CFStringRef)CTFontDescriptorCopyAttribute( pFD, kCTFontFamilyNameAttribute );
#endif
rDFA.SetFamilyName( GetOUString( pFamilyName ) );
// get font style
CFStringRef pStyleName = (CFStringRef)CTFontDescriptorCopyAttribute( pFD, kCTFontStyleNameAttribute );
rDFA.SetStyleName( GetOUString( pStyleName ) );
// get font-enabled status
if( bFontEnabled ) {
int bEnabled = TRUE; // by default (and when we're on OS X < 10.6) it's "enabled"
CFNumberRef pEnabled = (CFNumberRef)CTFontDescriptorCopyAttribute( pFD, kCTFontEnabledAttribute );
CFNumberGetValue( pEnabled, kCFNumberIntType, &bEnabled );
*bFontEnabled = bEnabled;
}
// get font attributes
CFDictionaryRef pAttrDict = (CFDictionaryRef)CTFontDescriptorCopyAttribute( pFD, kCTFontTraitsAttribute );
// get symbolic trait
// TODO: use other traits such as MonoSpace/Condensed/Expanded or Vertical too
SInt64 nSymbolTrait = 0;
CFNumberRef pSymbolNum = NULL;
if( CFDictionaryGetValueIfPresent( pAttrDict, kCTFontSymbolicTrait, reinterpret_cast<const void**>(&pSymbolNum) ) ) {
CFNumberGetValue( pSymbolNum, kCFNumberSInt64Type, &nSymbolTrait );
rDFA.SetSymbolFlag( ((nSymbolTrait & kCTFontClassMaskTrait) == kCTFontSymbolicClass) );
}
// get the font weight
double fWeight = 0;
CFNumberRef pWeightNum = (CFNumberRef)CFDictionaryGetValue( pAttrDict, kCTFontWeightTrait );
CFNumberGetValue( pWeightNum, kCFNumberDoubleType, &fWeight );
int nInt = WEIGHT_NORMAL;
if( fWeight > 0 ) {
nInt = rint(WEIGHT_NORMAL + fWeight * ((WEIGHT_BLACK - WEIGHT_NORMAL)/0.68));
if( nInt > WEIGHT_BLACK )
nInt = WEIGHT_BLACK;
} else if( fWeight < 0 ) {
nInt = rint(WEIGHT_NORMAL + fWeight * ((WEIGHT_NORMAL - WEIGHT_THIN)/0.9));
if( nInt < WEIGHT_THIN )
nInt = WEIGHT_THIN;
}
rDFA.SetWeight( (FontWeight)nInt );
// get the font slant
double fSlant = 0;
CFNumberRef pSlantNum = (CFNumberRef)CFDictionaryGetValue( pAttrDict, kCTFontSlantTrait );
CFNumberGetValue( pSlantNum, kCFNumberDoubleType, &fSlant );
if( fSlant >= 0.035 )
rDFA.SetItalic( ITALIC_NORMAL );
// get width trait
double fWidth = 0;
CFNumberRef pWidthNum = (CFNumberRef)CFDictionaryGetValue( pAttrDict, kCTFontWidthTrait );
CFNumberGetValue( pWidthNum, kCFNumberDoubleType, &fWidth );
nInt = WIDTH_NORMAL;
if( fWidth > 0 ) {
nInt = rint( WIDTH_NORMAL + fWidth * ((WIDTH_ULTRA_EXPANDED - WIDTH_NORMAL)/0.4));
if( nInt > WIDTH_ULTRA_EXPANDED )
nInt = WIDTH_ULTRA_EXPANDED;
} else if( fWidth < 0 ) {
nInt = rint( WIDTH_NORMAL + fWidth * ((WIDTH_NORMAL - WIDTH_ULTRA_CONDENSED)/0.5));
if( nInt < WIDTH_ULTRA_CONDENSED )
nInt = WIDTH_ULTRA_CONDENSED;
}
rDFA.SetWidthType( (FontWidth)nInt );
// release the attribute dict that we had copied
CFRelease( pAttrDict );
// TODO? also use the HEAD table if available to get more attributes
// CFDataRef CTFontCopyTable( CTFontRef, kCTFontTableHead, /*kCTFontTableOptionNoOptions*/kCTFontTableOptionExcludeSynthetic );
return rDFA;
}
static void CTFontEnumCallBack( const void* pValue, void* pContext )
{
CTFontDescriptorRef pFD = static_cast<CTFontDescriptorRef>(pValue);
bool bFontEnabled;
ImplDevFontAttributes rDFA = DevFontFromCTFontDescriptor( pFD, &bFontEnabled );
if( bFontEnabled)
{
const sal_IntPtr nFontId = reinterpret_cast<sal_IntPtr>(pValue);
CoreTextFontData* pFontData = new CoreTextFontData( rDFA, nFontId );
SystemFontList* pFontList = (SystemFontList*)pContext;
pFontList->AddFont( pFontData );
}
}
SystemFontList::SystemFontList()
: mpCTFontCollection( NULL )
, mpCTFontArray( NULL )
{}
SystemFontList::~SystemFontList()
{
CTFontContainer::const_iterator it = maFontContainer.begin();
for(; it != maFontContainer.end(); ++it )
delete (*it).second;
maFontContainer.clear();
if( mpCTFontArray )
CFRelease( mpCTFontArray );
if( mpCTFontCollection )
CFRelease( mpCTFontCollection );
}
void SystemFontList::AddFont( CoreTextFontData* pFontData )
{
sal_IntPtr nFontId = pFontData->GetFontId();
maFontContainer[ nFontId ] = pFontData;
}
void SystemFontList::AnnounceFonts( PhysicalFontCollection& rFontCollection ) const
{
CTFontContainer::const_iterator it = maFontContainer.begin();
for(; it != maFontContainer.end(); ++it )
rFontCollection.Add( (*it).second->Clone() );
}
CoreTextFontData* SystemFontList::GetFontDataFromId( sal_IntPtr nFontId ) const
{
CTFontContainer::const_iterator it = maFontContainer.find( nFontId );
if( it == maFontContainer.end() )
return NULL;
return (*it).second;
}
bool SystemFontList::Init( void )
{
// enumerate available system fonts
static const int nMaxDictEntries = 8;
CFMutableDictionaryRef pCFDict = CFDictionaryCreateMutable( NULL,
nMaxDictEntries, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks );
CFDictionaryAddValue( pCFDict, kCTFontCollectionRemoveDuplicatesOption, kCFBooleanTrue );
mpCTFontCollection = CTFontCollectionCreateFromAvailableFonts( pCFDict );
CFRelease( pCFDict );
mpCTFontArray = CTFontCollectionCreateMatchingFontDescriptors( mpCTFontCollection );
const int nFontCount = CFArrayGetCount( mpCTFontArray );
const CFRange aFullRange = CFRangeMake( 0, nFontCount );
CFArrayApplyFunction( mpCTFontArray, aFullRange, CTFontEnumCallBack, this );
return true;
}
SystemFontList* GetCoretextFontList( void )
{
SystemFontList* pList = new SystemFontList();
if( !pList->Init() ) {
delete pList;
return NULL;
}
return pList;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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