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Diffstat (limited to 'vcl/quartz/ctfonts.cxx')
| -rw-r--r-- | vcl/quartz/ctfonts.cxx | 560 |
1 files changed, 560 insertions, 0 deletions
diff --git a/vcl/quartz/ctfonts.cxx b/vcl/quartz/ctfonts.cxx new file mode 100644 index 000000000..eb67d981f --- /dev/null +++ b/vcl/quartz/ctfonts.cxx @@ -0,0 +1,560 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */ +/* + * 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 <sal/config.h> +#include <sal/log.hxx> + +#include <basegfx/polygon/b2dpolygon.hxx> +#include <basegfx/matrix/b2dhommatrix.hxx> + +#include <vcl/settings.hxx> + + +#include <quartz/ctfonts.hxx> +#include <impfont.hxx> +#ifdef MACOSX +#include <osx/saldata.hxx> +#include <osx/salinst.h> +#endif +#include <fontinstance.hxx> +#include <fontattributes.hxx> +#include <impglyphitem.hxx> +#include <PhysicalFontCollection.hxx> +#include <quartz/salgdi.h> +#include <quartz/utils.h> +#include <sallayout.hxx> +#include <hb-coretext.h> + +static double toRadian(int nDegree) +{ + return nDegree * (M_PI / 1800.0); +} + +CoreTextStyle::CoreTextStyle(const PhysicalFontFace& rPFF, const FontSelectPattern& rFSP) + : LogicalFontInstance(rPFF, rFSP) + , mfFontStretch( 1.0 ) + , mfFontRotation( 0.0 ) + , mbFauxBold(false) + , mpStyleDict( nullptr ) +{ + double fScaledFontHeight = rFSP.mfExactHeight; + + // convert font rotation to radian + mfFontRotation = toRadian(rFSP.mnOrientation); + + // dummy matrix so we can use CGAffineTransformConcat() below + CGAffineTransform aMatrix = CGAffineTransformMakeTranslation(0, 0); + + // handle font stretching if any + if( (rFSP.mnWidth != 0) && (rFSP.mnWidth != rFSP.mnHeight) ) + { + mfFontStretch = float(rFSP.mnWidth) / rFSP.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( nullptr, nMaxDictSize, + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks ); + + CFBooleanRef pCFVertBool = rFSP.mbVertical ? kCFBooleanTrue : kCFBooleanFalse; + CFDictionarySetValue( mpStyleDict, kCTVerticalFormsAttributeName, pCFVertBool ); + + // fake bold + if ( (rFSP.GetWeight() >= WEIGHT_BOLD) && + ((rPFF.GetWeight() < WEIGHT_SEMIBOLD) && + (rPFF.GetWeight() != WEIGHT_DONTKNOW)) ) + { + mbFauxBold = true; + } + + // fake italic + if (((rFSP.GetItalic() == ITALIC_NORMAL) || + (rFSP.GetItalic() == ITALIC_OBLIQUE)) && + (rPFF.GetItalic() == ITALIC_NONE)) + { + aMatrix = CGAffineTransformConcat(aMatrix, CGAffineTransformMake(1, 0, toRadian(120), 1, 0, 0)); + } + + CTFontDescriptorRef pFontDesc = reinterpret_cast<CTFontDescriptorRef>(rPFF.GetFontId()); + CTFontRef pNewCTFont = CTFontCreateWithFontDescriptor( pFontDesc, fScaledFontHeight, &aMatrix ); + CFDictionarySetValue( mpStyleDict, kCTFontAttributeName, pNewCTFont ); + CFRelease( pNewCTFont); +} + +CoreTextStyle::~CoreTextStyle() +{ + if( mpStyleDict ) + CFRelease( mpStyleDict ); +} + +void CoreTextStyle::GetFontMetric( ImplFontMetricDataRef const & rxFontMetric ) +{ + // get the matching CoreText font handle + // TODO: is it worth it to cache the CTFontRef in SetFont() and reuse it here? + CTFontRef aCTFontRef = static_cast<CTFontRef>(CFDictionaryGetValue( mpStyleDict, kCTFontAttributeName )); + + rxFontMetric->ImplCalcLineSpacing(this); + + // 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 + rxFontMetric->SetWidth( lrint( CTFontGetSize( aCTFontRef ) * mfFontStretch) ); + + rxFontMetric->SetMinKashida(GetKashidaWidth()); +} + +bool CoreTextStyle::ImplGetGlyphBoundRect(sal_GlyphId nId, tools::Rectangle& rRect, bool bVertical) const +{ + CGGlyph nCGGlyph = nId; + CTFontRef aCTFontRef = static_cast<CTFontRef>(CFDictionaryGetValue( mpStyleDict, kCTFontAttributeName )); + + SAL_WNODEPRECATED_DECLARATIONS_PUSH //TODO: 10.11 kCTFontDefaultOrientation + const CTFontOrientation aFontOrientation = kCTFontDefaultOrientation; // TODO: horz/vert + SAL_WNODEPRECATED_DECLARATIONS_POP + CGRect aCGRect = CTFontGetBoundingRectsForGlyphs(aCTFontRef, aFontOrientation, &nCGGlyph, nullptr, 1); + + // Apply font rotation to non-vertical glyphs. + if (mfFontRotation && !bVertical) + aCGRect = CGRectApplyAffineTransform(aCGRect, CGAffineTransformMakeRotation(mfFontRotation)); + + long xMin = floor(aCGRect.origin.x); + long yMin = floor(aCGRect.origin.y); + long xMax = ceil(aCGRect.origin.x + aCGRect.size.width); + long yMax = ceil(aCGRect.origin.y + aCGRect.size.height); + rRect = tools::Rectangle(xMin, -yMax, xMax, -yMin); + return true; +} + +namespace { + +// 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; + } + [[fallthrough]]; + 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 nId, basegfx::B2DPolyPolygon& rResult, bool) const +{ + rResult.clear(); + + CGGlyph nCGGlyph = nId; + CTFontRef pCTFont = static_cast<CTFontRef>(CFDictionaryGetValue( mpStyleDict, kCTFontAttributeName )); + + SAL_WNODEPRECATED_DECLARATIONS_PUSH + const CTFontOrientation aFontOrientation = kCTFontDefaultOrientation; + SAL_WNODEPRECATED_DECLARATIONS_POP + CGRect aCGRect = CTFontGetBoundingRectsForGlyphs(pCTFont, aFontOrientation, &nCGGlyph, nullptr, 1); + + if (!CGRectIsNull(aCGRect) && CGRectIsEmpty(aCGRect)) + { + // CTFontCreatePathForGlyph returns NULL for blank glyphs, but we want + // to return true for them. + return true; + } + + CGPathRef xPath = CTFontCreatePathForGlyph( pCTFont, nCGGlyph, nullptr ); + if (!xPath) + { + return false; + } + + GgoData aGgoData; + aGgoData.mpPolyPoly = &rResult; + CGPathApply( xPath, static_cast<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; +} + +static hb_blob_t* getFontTable(hb_face_t* /*face*/, hb_tag_t nTableTag, void* pUserData) +{ + sal_uLong nLength = 0; + unsigned char* pBuffer = nullptr; + CoreTextFontFace* pFont = static_cast<CoreTextFontFace*>(pUserData); + nLength = pFont->GetFontTable(nTableTag, nullptr); + if (nLength > 0) + { + pBuffer = new unsigned char[nLength]; + pFont->GetFontTable(nTableTag, pBuffer); + } + + hb_blob_t* pBlob = nullptr; + if (pBuffer != nullptr) + pBlob = hb_blob_create(reinterpret_cast<const char*>(pBuffer), nLength, HB_MEMORY_MODE_READONLY, + pBuffer, [](void* data){ delete[] static_cast<unsigned char*>(data); }); + return pBlob; +} + +hb_font_t* CoreTextStyle::ImplInitHbFont() +{ + hb_face_t* pHbFace = hb_face_create_for_tables(getFontTable, GetFontFace(), nullptr); + + return InitHbFont(pHbFace); +} + +rtl::Reference<LogicalFontInstance> CoreTextFontFace::CreateFontInstance(const FontSelectPattern& rFSD) const +{ + return new CoreTextStyle(*this, rFSD); +} + +int CoreTextFontFace::GetFontTable( const char pTagName[5], unsigned char* pResultBuf ) const +{ + SAL_WARN_IF( pTagName[4]!='\0', "vcl", "CoreTextFontFace::GetFontTable with invalid tagname!" ); + + const CTFontTableTag nTagCode = (pTagName[0]<<24) + (pTagName[1]<<16) + (pTagName[2]<<8) + (pTagName[3]<<0); + + return GetFontTable(nTagCode, pResultBuf); +} + +int CoreTextFontFace::GetFontTable(uint32_t nTagCode, unsigned char* pResultBuf ) const +{ + // get the raw table length + CTFontDescriptorRef pFontDesc = reinterpret_cast<CTFontDescriptorRef>( GetFontId()); + CTFontRef rCTFont = CTFontCreateWithFontDescriptor( pFontDesc, 0.0, nullptr); + 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, reinterpret_cast<UInt8*>(pResultBuf)); + } + + CFRelease( pDataRef); + + return static_cast<int>(nByteLength); +} + +FontAttributes DevFontFromCTFontDescriptor( CTFontDescriptorRef pFD, bool* bFontEnabled ) +{ + // all CoreText fonts are device fonts that can rotate just fine + FontAttributes rDFA; + rDFA.SetQuality( 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 ); + + // get font name +#ifdef MACOSX + CFStringRef pLang = nullptr; + CFStringRef pFamilyName = static_cast<CFStringRef>( + CTFontDescriptorCopyLocalizedAttribute( pFD, kCTFontFamilyNameAttribute, &pLang )); + + if ( !pLang ) + { + if( pFamilyName ) + { + CFRelease( pFamilyName ); + } + pFamilyName = static_cast<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 = static_cast<CFStringRef>(CTFontDescriptorCopyAttribute( pFD, kCTFontStyleNameAttribute )); + rDFA.SetStyleName( GetOUString( pStyleName ) ); + + // get font-enabled status + if( bFontEnabled ) + { + int bEnabled = TRUE; // by default (and when we're on macOS < 10.6) it's "enabled" + CFNumberRef pEnabled = static_cast<CFNumberRef>(CTFontDescriptorCopyAttribute( pFD, kCTFontEnabledAttribute )); + CFNumberGetValue( pEnabled, kCFNumberIntType, &bEnabled ); + *bFontEnabled = bEnabled; + } + + // get font attributes + CFDictionaryRef pAttrDict = static_cast<CFDictionaryRef>(CTFontDescriptorCopyAttribute( pFD, kCTFontTraitsAttribute )); + + if (bFontEnabled && *bFontEnabled) + { + // Ignore font formats not supported. + int nFormat; + CFNumberRef pFormat = static_cast<CFNumberRef>(CTFontDescriptorCopyAttribute(pFD, kCTFontFormatAttribute)); + CFNumberGetValue(pFormat, kCFNumberIntType, &nFormat); + if (nFormat == kCTFontFormatUnrecognized || nFormat == kCTFontFormatPostScript || nFormat == kCTFontFormatBitmap) + { + SAL_INFO("vcl.fonts", "Ignoring font with unsupported format: " << rDFA.GetFamilyName()); + *bFontEnabled = false; + } + CFRelease(pFormat); + } + + // get symbolic trait + // TODO: use other traits such as MonoSpace/Condensed/Expanded or Vertical too + SInt64 nSymbolTrait = 0; + CFNumberRef pSymbolNum = nullptr; + 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 = static_cast<CFNumberRef>(CFDictionaryGetValue( pAttrDict, kCTFontWeightTrait )); + CFNumberGetValue( pWeightNum, kCFNumberDoubleType, &fWeight ); + int nInt = WEIGHT_NORMAL; + + // Special case fixes + + // tdf#67744: Courier Std Medium is always bold. We get a kCTFontWeightTrait of 0.23 which + // surely must be wrong. + if (rDFA.GetFamilyName() == "Courier Std" && + (rDFA.GetStyleName() == "Medium" || rDFA.GetStyleName() == "Medium Oblique") && + fWeight > 0.2) + { + fWeight = 0; + } + + // tdf#68889: Ditto for Gill Sans MT Pro. Here I can kinda understand it, maybe the + // kCTFontWeightTrait is intended to give a subjective "optical" impression of how the font + // looks, and Gill Sans MT Pro Medium is kinda heavy. But with the way LibreOffice uses fonts, + // we still should think of it as being "medium" weight. + if (rDFA.GetFamilyName() == "Gill Sans MT Pro" && + (rDFA.GetStyleName() == "Medium" || rDFA.GetStyleName() == "Medium Italic") && + fWeight > 0.2) + { + fWeight = 0; + } + + if( fWeight > 0 ) + { + nInt = rint(int(WEIGHT_NORMAL) + fWeight * ((WEIGHT_BLACK - WEIGHT_NORMAL)/0.68)); + if( nInt > WEIGHT_BLACK ) + { + nInt = WEIGHT_BLACK; + } + } + else if( fWeight < 0 ) + { + nInt = rint(int(WEIGHT_NORMAL) + fWeight * ((WEIGHT_NORMAL - WEIGHT_THIN)/0.8)); + if( nInt < WEIGHT_THIN ) + { + nInt = WEIGHT_THIN; + } + } + rDFA.SetWeight( static_cast<FontWeight>(nInt) ); + + // get the font slant + double fSlant = 0; + CFNumberRef pSlantNum = static_cast<CFNumberRef>(CFDictionaryGetValue( pAttrDict, kCTFontSlantTrait )); + CFNumberGetValue( pSlantNum, kCFNumberDoubleType, &fSlant ); + if( fSlant >= 0.035 ) + { + rDFA.SetItalic( ITALIC_NORMAL ); + } + // get width trait + double fWidth = 0; + CFNumberRef pWidthNum = static_cast<CFNumberRef>(CFDictionaryGetValue( pAttrDict, kCTFontWidthTrait )); + CFNumberGetValue( pWidthNum, kCFNumberDoubleType, &fWidth ); + nInt = WIDTH_NORMAL; + + if( fWidth > 0 ) + { + nInt = rint( int(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( int(WIDTH_NORMAL) + fWidth * ((WIDTH_NORMAL - WIDTH_ULTRA_CONDENSED)/0.5)); + if( nInt < WIDTH_ULTRA_CONDENSED ) + { + nInt = WIDTH_ULTRA_CONDENSED; + } + } + rDFA.SetWidthType( static_cast<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 fontEnumCallBack( const void* pValue, void* pContext ) +{ + CTFontDescriptorRef pFD = static_cast<CTFontDescriptorRef>(pValue); + + bool bFontEnabled; + FontAttributes rDFA = DevFontFromCTFontDescriptor( pFD, &bFontEnabled ); + + if( bFontEnabled) + { + const sal_IntPtr nFontId = reinterpret_cast<sal_IntPtr>(pValue); + rtl::Reference<CoreTextFontFace> pFontData = new CoreTextFontFace( rDFA, nFontId ); + SystemFontList* pFontList = static_cast<SystemFontList*>(pContext); + pFontList->AddFont( pFontData.get() ); + } +} + +SystemFontList::SystemFontList() + : mpCTFontCollection( nullptr ) + , mpCTFontArray( nullptr ) +{} + +SystemFontList::~SystemFontList() +{ + maFontContainer.clear(); + + if( mpCTFontArray ) + { + CFRelease( mpCTFontArray ); + } + if( mpCTFontCollection ) + { + CFRelease( mpCTFontCollection ); + } +} + +void SystemFontList::AddFont( CoreTextFontFace* pFontData ) +{ + sal_IntPtr nFontId = pFontData->GetFontId(); + maFontContainer[ nFontId ] = pFontData; +} + +void SystemFontList::AnnounceFonts( PhysicalFontCollection& rFontCollection ) const +{ + for(const auto& rEntry : maFontContainer ) + { + rFontCollection.Add( rEntry.second.get() ); + } +} + +CoreTextFontFace* SystemFontList::GetFontDataFromId( sal_IntPtr nFontId ) const +{ + auto it = maFontContainer.find( nFontId ); + if( it == maFontContainer.end() ) + { + return nullptr; + } + return (*it).second.get(); +} + +bool SystemFontList::Init() +{ + // enumerate available system fonts + static const int nMaxDictEntries = 8; + CFMutableDictionaryRef pCFDict = CFDictionaryCreateMutable( nullptr, + 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, fontEnumCallBack, this ); + + return true; +} + +SystemFontList* GetCoretextFontList() +{ + SystemFontList* pList = new SystemFontList(); + if( !pList->Init() ) + { + delete pList; + return nullptr; + } + + return pList; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |