diff options
author | Armin Le Grand (Allotropia) <armin.le.grand@me.com> | 2021-02-16 18:20:32 +0100 |
---|---|---|
committer | Armin Le Grand <Armin.Le.Grand@me.com> | 2021-02-17 09:31:09 +0100 |
commit | 9d161857f1d4afcb772b477455797a2da0e47a9b (patch) | |
tree | 261c8146ffd4eb9a2b8d15ce6b7648a48ba2faa7 | |
parent | 10e16862684c71361119565ee4dc6bdf3e217197 (diff) |
tdf#127471 correct EMF/WMF im/export for scaled font
If FontScaling is used, system-dependent data is held at
vcl::Font Width(). Already if not scaled, we have three
definitions: Width is zero, Width is equal to Height (unx)
or - on Windows - Width equals avgFontWidth.
If used it is W!=H where on unx Width equals Height multiplied
with the scale factor. On Windows, this is Width multiplied
with the only there existing avgFontWidth.
Unfortunately that is ex/imported (since ever) undetected
to EMF/WMF thus making EMF/WMF files containing FontScaling
system-dependent - on which system was LO running when
creating the file? The error can be seen when loading such
a EMF/WMF on the vice-versa system, the FontScale is very
ugly and wrong.
Since EMF/WMF *are* Windows-specific formats the Windows-like
definition is the correct one. This change makes all other
systems export that now, and adapt on import to their system-
specific definition (assuming coming from Windows).
As can be seen, the difficulty is that these adaptions are
necessary on non-Windows plattforms, but these do not have
that avgFontWidth available. Thus I made a deep-dive
investigation and multiple experiments to create a as
similar as possible value to apply the needed calculations.
For details and discussion refer to the bug description.
Change-Id: I983fb6d882e2e8fccf9c8460f01509201d8157f9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/111000
Tested-by: Jenkins
Reviewed-by: Armin Le Grand <Armin.Le.Grand@me.com>
-rw-r--r-- | emfio/source/reader/mtftools.cxx | 20 | ||||
-rw-r--r-- | include/vcl/font.hxx | 3 | ||||
-rw-r--r-- | vcl/inc/impfont.hxx | 21 | ||||
-rw-r--r-- | vcl/source/filter/wmf/emfwr.cxx | 27 | ||||
-rw-r--r-- | vcl/source/font/font.cxx | 43 |
5 files changed, 108 insertions, 6 deletions
diff --git a/emfio/source/reader/mtftools.cxx b/emfio/source/reader/mtftools.cxx index b05beeb2a9dc..6064ca937a16 100644 --- a/emfio/source/reader/mtftools.cxx +++ b/emfio/source/reader/mtftools.cxx @@ -277,8 +277,26 @@ namespace emfio // Convert height to positive aFontSize.setHeight( std::abs(aFontSize.Height()) ); - aFont.SetFontSize(aFontSize); + + // tdf#127471 adapt nFontWidth from Windows-like notation to + // NormedFontScaling if used for text scaling +#ifndef _WIN32 + const bool bFontScaledHorizontally(aFontSize.Width() != 0 && aFontSize.Width() != aFontSize.Height()); + + if(bFontScaledHorizontally) + { + // tdf#127471 nFontWidth is the Windows FontScaling, need to convert to + // Non-Windowslike notation relative to FontHeight. + const tools::Long nAverageFontWidth(aFont.GetOrCalculateAverageFontWidth()); + + if(nAverageFontWidth > 0) + { + const double fScaleFactor(static_cast<double>(aFontSize.Height()) / static_cast<double>(nAverageFontWidth)); + aFont.SetAverageFontWidth(static_cast<tools::Long>(static_cast<double>(aFontSize.Width()) * fScaleFactor)); + } + } +#endif }; Color MtfTools::ReadColor() diff --git a/include/vcl/font.hxx b/include/vcl/font.hxx index 2d437c5b3da0..3147f57aba14 100644 --- a/include/vcl/font.hxx +++ b/include/vcl/font.hxx @@ -113,6 +113,9 @@ public: void SetAverageFontWidth( tools::Long nWidth ); tools::Long GetAverageFontWidth() const; + // tdf#127471 for corrections on EMF/WMF we need the AvgFontWidth in Windows-specific notation + tools::Long GetOrCalculateAverageFontWidth() const; + // Prefer LanguageTag over LanguageType void SetLanguageTag( const LanguageTag & ); const LanguageTag& GetLanguageTag() const; diff --git a/vcl/inc/impfont.hxx b/vcl/inc/impfont.hxx index ba1ea3683926..14a2189d3921 100644 --- a/vcl/inc/impfont.hxx +++ b/vcl/inc/impfont.hxx @@ -62,7 +62,18 @@ public: void SetWidthType( const FontWidth eWidthType ) { meWidthType = eWidthType; } void SetAlignment( const TextAlign eAlignment ) { meAlign = eAlignment; } void SetCharSet( const rtl_TextEncoding eCharSet ) { meCharSet = eCharSet; } - void SetFontSize( const Size& rSize ) { maAverageFontSize = rSize; } + void SetFontSize( const Size& rSize ) + { +#ifndef _WIN32 + if(rSize.Height() != maAverageFontSize.Height()) + { + // reset evtl. buffered calculated AverageFontSize, it depends + // on Font::Height + mnCalculatedAverageFontWidth = 0; + } +#endif + maAverageFontSize = rSize; + } void SetSymbolFlag( const bool bSymbolFlag ) { mbSymbolFlag = bSymbolFlag; } @@ -80,6 +91,11 @@ public: void IncreaseQualityBy( int nQualityAmount ) { mnQuality += nQualityAmount; } void DecreaseQualityBy( int nQualityAmount ) { mnQuality -= nQualityAmount; } +#ifndef _WIN32 + tools::Long GetCalculatedAverageFontWidth() const { return mnCalculatedAverageFontWidth; } + void SetCalculatedAverageFontWidth(tools::Long nNew) { mnCalculatedAverageFontWidth = nNew; } +#endif + bool operator==( const ImplFont& ) const; private: @@ -130,6 +146,9 @@ private: int mnQuality; +#ifndef _WIN32 + tools::Long mnCalculatedAverageFontWidth; +#endif }; #endif // INCLUDED_VCL_INC_IMPFONT_HXX diff --git a/vcl/source/filter/wmf/emfwr.cxx b/vcl/source/filter/wmf/emfwr.cxx index b2d692e339dd..51e24469e3d7 100644 --- a/vcl/source/filter/wmf/emfwr.cxx +++ b/vcl/source/filter/wmf/emfwr.cxx @@ -459,10 +459,33 @@ void EMFWriter::ImplCheckTextAttr() sal_uInt16 i; sal_uInt8 nPitchAndFamily; + // tdf#127471 adapt nFontWidth from NormedFontScaling to + // Windows-like notation if used for text scaling + const tools::Long nFontHeight(rFont.GetFontSize().Height()); + tools::Long nFontWidth(rFont.GetFontSize().Width()); + +#ifndef _WIN32 + const bool bFontScaledHorizontally(nFontWidth != 0 && nFontWidth != nFontHeight); + + if(bFontScaledHorizontally) + { + // tdf#127471 nFontWidth is the non-Windows NormedFontScaling, need to convert to + // Windows-like notation with pre-multiplied AvgFontWidth since EMF/WMF are Windows + // specific formats. + const tools::Long nAverageFontWidth(rFont.GetOrCalculateAverageFontWidth()); + + if(nAverageFontWidth > 0) + { + const double fScaleFactor(static_cast<double>(nAverageFontWidth) / static_cast<double>(nFontHeight)); + nFontWidth = static_cast<tools::Long>(static_cast<double>(nFontWidth) * fScaleFactor); + } + } +#endif + ImplBeginRecord( WIN_EMR_EXTCREATEFONTINDIRECTW ); m_rStm.WriteUInt32( mnTextHandle ); - ImplWriteExtent( -rFont.GetFontSize().Height() ); - ImplWriteExtent( rFont.GetFontSize().Width() ); + ImplWriteExtent( -nFontHeight ); + ImplWriteExtent( nFontWidth ); m_rStm.WriteInt32( rFont.GetOrientation().get() ).WriteInt32( rFont.GetOrientation().get() ); switch( rFont.GetWeight() ) diff --git a/vcl/source/font/font.cxx b/vcl/source/font/font.cxx index b4f685e63967..67fc3e7bc633 100644 --- a/vcl/source/font/font.cxx +++ b/vcl/source/font/font.cxx @@ -37,8 +37,8 @@ #ifdef _WIN32 #include <vcl/metric.hxx> -#include <vcl/outdev.hxx> -#include <vcl/svapp.hxx> +#else +#include <vcl/virdev.hxx> #endif using namespace vcl; @@ -364,6 +364,39 @@ void Font::GetFontAttributes( FontAttributes& rAttrs ) const rAttrs.SetSymbolFlag( mpImplFont->GetCharSet() == RTL_TEXTENCODING_SYMBOL ); } +// tdf#127471 for corrections on EMF/WMF we need the AvgFontWidth in Windows-specific notation +tools::Long Font::GetOrCalculateAverageFontWidth() const +{ +#ifdef _WIN32 + // on windows we just have it available + return GetAverageFontWidth(); +#else + // On non-Windows systems we need to calculate AvgFontWidth + // as close as possible (discussion see documentation in task) + if(0 == mpImplFont->GetCalculatedAverageFontWidth()) + { + // calculate it. For discussion of method used, see task + const std::size_t nSize(127 - 32); + std::array<sal_Unicode, nSize> aArray; + + for(sal_Unicode a(0); a < nSize; a++) + { + aArray[a] = a + 32; + } + + vcl::Font aUnscaledFont(*this); + ScopedVclPtr<VirtualDevice> pVirDev(VclPtr<VirtualDevice>::Create()); + aUnscaledFont.SetAverageFontWidth(0); + pVirDev->SetFont(aUnscaledFont); + const double fAverageFontWidth( + pVirDev->GetTextWidth(OUString(aArray.data())) / static_cast<double>(nSize)); + const_cast<Font*>(this)->mpImplFont->SetCalculatedAverageFontWidth(basegfx::fround(fAverageFontWidth)); + } + + return mpImplFont->GetCalculatedAverageFontWidth(); +#endif +} + SvStream& ReadImplFont( SvStream& rIStm, ImplFont& rImplFont, tools::Long& rnNormedFontScaling ) { VersionCompatRead aCompat( rIStm ); @@ -851,6 +884,9 @@ ImplFont::ImplFont() : mbWordLine( false ), mnOrientation( 0 ), mnQuality( 0 ) +#ifndef _WIN32 + , mnCalculatedAverageFontWidth(0) +#endif {} ImplFont::ImplFont( const ImplFont& rImplFont ) : @@ -883,6 +919,9 @@ ImplFont::ImplFont( const ImplFont& rImplFont ) : mbWordLine( rImplFont.mbWordLine ), mnOrientation( rImplFont.mnOrientation ), mnQuality( rImplFont.mnQuality ) +#ifndef _WIN32 + , mnCalculatedAverageFontWidth(rImplFont.mnCalculatedAverageFontWidth) +#endif {} bool ImplFont::operator==( const ImplFont& rOther ) const |