Author: hdu
Date: Thu Apr 10 09:36:16 2014
New Revision: 1586250
URL: http://svn.apache.org/r1586250
Log:
#i124617# make CoreText tolerate PDF-export's unexpected font switches
For some documents it was observed that the PDF-export switches the font after
text layout and before text drawing/measuring. This use case is quite atrocious
and unexpected and crashed our CoreText glue code. The other platforms survive
it though; to minimize the risk to them only the CoreText glue gets adapted to
survive this scenario.
Merged from trunk revision 1586249.
Modified:
openoffice/branches/AOO410/ (props changed)
openoffice/branches/AOO410/main/ (props changed)
openoffice/branches/AOO410/main/vcl/aqua/source/gdi/ctlayout.cxx
Propchange: openoffice/branches/AOO410/
------------------------------------------------------------------------------
Merged /openoffice/trunk:r1586249
Propchange: openoffice/branches/AOO410/main/
------------------------------------------------------------------------------
Merged /openoffice/trunk/main:r1586249
Modified: openoffice/branches/AOO410/main/vcl/aqua/source/gdi/ctlayout.cxx
URL:
http://svn.apache.org/viewvc/openoffice/branches/AOO410/main/vcl/aqua/source/gdi/ctlayout.cxx?rev=1586250&r1=1586249&r2=1586250&view=diff
==============================================================================
--- openoffice/branches/AOO410/main/vcl/aqua/source/gdi/ctlayout.cxx (original)
+++ openoffice/branches/AOO410/main/vcl/aqua/source/gdi/ctlayout.cxx Thu Apr 10
09:36:16 2014
@@ -52,21 +52,23 @@ public:
virtual void Simplify( bool bIsBase );
private:
- const CTTextStyle* const mpTextStyle;
-
// CoreText specific objects
+ CFMutableDictionaryRef mpStyleDict;
CFAttributedStringRef mpAttrString;
CTLineRef mpCTLine;
int mnCharCount; // ==mnEndCharPos-mnMinCharPos
int mnTrailingSpaceCount;
double mfTrailingSpaceWidth; // preserves the width of stripped-off
trailing space
-
+
// to prevent overflows
// font requests get size limited by downscaling huge fonts
// in these cases the font scale becomes something bigger than 1.0
float mfFontScale; // TODO: does CoreText have a font size limit?
+ CGFloat mfFontRotation; // text direction angle (in radians)
+ CGFloat mfFontStretch; <1.0: font is squeezed, >1.0 font is stretched
+
// cached details about the resulting layout
// mutable members since these details are all lazy initialized
mutable double mfCachedWidth; // cached value of
resulting typographical width
@@ -79,17 +81,19 @@ private:
// =======================================================================
CTLayout::CTLayout( const CTTextStyle* pTextStyle )
-: mpTextStyle( pTextStyle )
+: mpStyleDict( pTextStyle->GetStyleDict() )
, mpAttrString( NULL )
, mpCTLine( NULL )
, mnCharCount( 0 )
, mnTrailingSpaceCount( 0 )
, mfTrailingSpaceWidth( 0.0 )
, mfFontScale( pTextStyle->mfFontScale )
+, mfFontRotation( pTextStyle->mfFontRotation )
+, mfFontStretch( pTextStyle->mfFontStretch )
, mfCachedWidth( -1 )
, mnBaseAdv( 0 )
{
- CFRetain( mpTextStyle->GetStyleDict() );
+ CFRetain( mpStyleDict );
}
// -----------------------------------------------------------------------
@@ -100,7 +104,7 @@ CTLayout::~CTLayout()
CFRelease( mpCTLine );
if( mpAttrString )
CFRelease( mpAttrString );
- CFRelease( mpTextStyle->GetStyleDict() );
+ CFRelease( mpStyleDict );
}
// -----------------------------------------------------------------------
@@ -131,7 +135,7 @@ bool CTLayout::LayoutText( ImplLayoutArg
}
// create the CoreText line layout using the requested text style
- mpAttrString = CFAttributedStringCreate( NULL, aCFText,
mpTextStyle->GetStyleDict() );
+ mpAttrString = CFAttributedStringCreate( NULL, aCFText, mpStyleDict );
mpCTLine = CTLineCreateWithAttributedString( mpAttrString );
CFRelease( aCFText);
@@ -201,7 +205,7 @@ void CTLayout::AdjustLayout( ImplLayoutA
CFRelease( mpCTLine );
CFStringRef aCFText = CFStringCreateWithCharactersNoCopy( NULL,
rArgs.mpStr + mnMinCharPos,
mnCharCount - mnTrailingSpaceCount, kCFAllocatorNull );
- CFAttributedStringRef pAttrStr = CFAttributedStringCreate(
NULL, aCFText, mpTextStyle->GetStyleDict() );
+ CFAttributedStringRef pAttrStr = CFAttributedStringCreate(
NULL, aCFText, mpStyleDict );
mpCTLine = CTLineCreateWithAttributedString( pAttrStr );
CFRelease( aCFText);
CFRelease( pAttrStr );
@@ -249,12 +253,11 @@ void CTLayout::DrawText( SalGraphics& rG
const Point aVclPos = GetDrawPosition( Point(mnBaseAdv,0) );
CGPoint aTextPos = { +aVclPos.X()/mfFontScale, -aVclPos.Y()/mfFontScale
};
- if( mpTextStyle->mfFontRotation != 0.0 )
+ if( mfFontRotation != 0.0 )
{
- const CGFloat fRadians = mpTextStyle->mfFontRotation;
- CGContextRotateCTM( rAquaGraphics.mrContext, +fRadians );
+ CGContextRotateCTM( rAquaGraphics.mrContext, +mfFontRotation );
- const CGAffineTransform aInvMatrix =
CGAffineTransformMakeRotation( -fRadians );
+ const CGAffineTransform aInvMatrix =
CGAffineTransformMakeRotation( -mfFontRotation );
aTextPos = CGPointApplyAffineTransform( aTextPos, aInvMatrix );
}
@@ -353,12 +356,12 @@ int CTLayout::GetNextGlyphs( int nLen, s
// convert glyph details for VCL
*(pOutGlyphIds++) = pCGGlyphIdx[ nSubIndex ];
if( pGlyphAdvances )
- *(pGlyphAdvances++) = pCGGlyphAdvs[ nSubIndex
].width;
+ *(pGlyphAdvances++) = mfFontStretch *
pCGGlyphAdvs[ nSubIndex ].width;
if( pCharIndexes )
*(pCharIndexes++) = pCGGlyphStrIdx[ nSubIndex]
+ mnMinCharPos;
if( !nCount++ ) {
const CGPoint& rCurPos = pCGGlyphPos[ nSubIndex
];
- rPos = GetDrawPosition( Point( mfFontScale *
rCurPos.x, mfFontScale * rCurPos.y) );
+ rPos = GetDrawPosition( Point( mfFontScale *
mfFontStretch * rCurPos.x, mfFontScale * rCurPos.y) );
}
}
nSubIndex = 0; // prepare for the next glyph run
