Author: hdu
Date: Mon Jul 22 09:50:08 2013
New Revision: 1505643
URL: http://svn.apache.org/r1505643
Log:
#i122796# fix half-pixel offset in StretchAndConvert() image scaling
Modified:
openoffice/trunk/main/vcl/source/gdi/salmisc.cxx
Modified: openoffice/trunk/main/vcl/source/gdi/salmisc.cxx
URL:
http://svn.apache.org/viewvc/openoffice/trunk/main/vcl/source/gdi/salmisc.cxx?rev=1505643&r1=1505642&r2=1505643&view=diff
==============================================================================
--- openoffice/trunk/main/vcl/source/gdi/salmisc.cxx (original)
+++ openoffice/trunk/main/vcl/source/gdi/salmisc.cxx Mon Jul 22 09:50:08 2013
@@ -428,13 +428,13 @@ BitmapBuffer* StretchAndConvert(
return NULL;
}
- // horizontal mapping table
- if( nDstDX != nSrcDX )
+ // horizontal mapping table
+ if( (nDstDX != nSrcDX) && (nDstDX != 0) )
{
- const double fFactorX = ( nDstDX > 1 ) ? (double) ( nSrcDX - 1
) / ( nDstDX - 1 ) : 0.0;
+ const double fFactorX = (double)nSrcDX / nDstDX;
for( i = 0L; i < nDstDX; i++ )
- pMapX[ i ] = nSrcX + FRound( i * fFactorX );
+ pMapX[ i ] = nSrcX + static_cast<int>( i * fFactorX );
}
else
{
@@ -443,12 +443,12 @@ BitmapBuffer* StretchAndConvert(
}
// vertical mapping table
- if( nDstDY != nSrcDY )
+ if( (nDstDY != nSrcDY) && (nDstDY != 0) )
{
- const double fFactorY = ( nDstDY > 1 ) ? (double) ( nSrcDY - 1
) / ( nDstDY - 1 ) : 0.0;
+ const double fFactorY = (double)nSrcDY / nDstDY;
for( i = 0L; i < nDstDY; i++ )
- pMapY[ i ] = nSrcY + FRound( i * fFactorY );
+ pMapY[ i ] = nSrcY + static_cast<int>( i * fFactorY );
}
else
{
