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#98290# Use different mapping for non-interpolating mode

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This commit is contained in:
Thorsten Behrens 2002-10-10 15:15:08 +00:00
parent 6e48f8704d
commit e39496b89c
1 changed files with 50 additions and 26 deletions
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76
goodies/source/graphic/grfmgr2.cxx
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@ -2,9 +2,9 @@
*
* $RCSfile: grfmgr2.cxx,v $
*
* $Revision: 1.9 $
* $Revision: 1.10 $
*
* last change: $Author: ka $ $Date: 2002-08-16 11:03:41 $
* last change: $Author: thb $ $Date: 2002-10-10 16:15:08 $
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
@ -377,8 +377,6 @@ BOOL GraphicManager::ImplCreateOutput( OutputDevice* pOut,
const long nH = rBmpSzPix.Height();
const long nNewW = aUnrotatedSzPix.Width();
const long nNewH = aUnrotatedSzPix.Height();
const double fRevScaleX = ( nNewW > 1L ) ? ( (double) ( nW - 1L ) / ( nNewW - 1L ) ) : 0.0;
const double fRevScaleY = ( nNewH > 1L ) ? ( (double) ( nH - 1L ) / ( nNewH - 1L ) ) : 0.0;
double fTmp;
long* pMapIX = new long[ nNewW ];
long* pMapFX = new long[ nNewW ];
@ -389,37 +387,63 @@ BOOL GraphicManager::ImplCreateOutput( OutputDevice* pOut,
BOOL bHMirr = ( rAttr.GetMirrorFlags() & BMP_MIRROR_HORZ ) != 0;
BOOL bVMirr = ( rAttr.GetMirrorFlags() & BMP_MIRROR_VERT ) != 0;
// create horizontal mapping table
for( nX = 0L, nTmpX = nW - 1L, nTmp = nW - 2L; nX < nNewW; nX++ )
if( nFlags & GRFMGR_DRAW_BILINEAR )
{
fTmp = nX * fRevScaleX;
const double fRevScaleX = ( nNewW > 1L ) ? ( (double) ( nW - 1L ) / ( nNewW - 1L ) ) : 0.0;
const double fRevScaleY = ( nNewH > 1L ) ? ( (double) ( nH - 1L ) / ( nNewH - 1L ) ) : 0.0;
if( bHMirr )
fTmp = nTmpX - fTmp;
if( nFlags & GRFMGR_DRAW_BILINEAR )
pMapFX[ nX ] = (long) ( ( fTmp - ( pMapIX[ nX ] = MinMax( (long) fTmp, 0, nTmp ) ) ) * 1048576. );
else
// create horizontal mapping table
for( nX = 0L, nTmpX = nW - 1L, nTmp = nW - 2L; nX < nNewW; nX++ )
{
pMapIX[ nX ] = MinMax( (long) fTmp, 0, nTmp );
pMapFX[ nX ] = 0;
fTmp = nX * fRevScaleX;
if( bHMirr )
fTmp = nTmpX - fTmp;
pMapFX[ nX ] = (long) ( ( fTmp - ( pMapIX[ nX ] = MinMax( (long) fTmp, 0, nTmp ) ) ) * 1048576. );
}
// create vertical mapping table
for( nY = 0L, nTmpY = nH - 1L, nTmp = nH - 2L; nY < nNewH; nY++ )
{
fTmp = nY * fRevScaleY;
if( bVMirr )
fTmp = nTmpY - fTmp;
pMapFY[ nY ] = (long) ( ( fTmp - ( pMapIY[ nY ] = MinMax( (long) fTmp, 0, nTmp ) ) ) * 1048576. );
}
}
// create vertical mapping table
for( nY = 0L, nTmpY = nH - 1L, nTmp = nH - 2L; nY < nNewH; nY++ )
else
{
fTmp = nY * fRevScaleY;
// #98290# Use a different mapping for non-interpolating mode, to avoid missing rows/columns
const double fRevScaleX = ( nNewW > 1L ) ? ( (double) nW / nNewW ) : 0.0;
const double fRevScaleY = ( nNewH > 1L ) ? ( (double) nH / nNewH ) : 0.0;
if( bVMirr )
fTmp = nTmpY - fTmp;
if( nFlags & GRFMGR_DRAW_BILINEAR )
pMapFY[ nY ] = (long) ( ( fTmp - ( pMapIY[ nY ] = MinMax( (long) fTmp, 0, nTmp ) ) ) * 1048576. );
else
// create horizontal mapping table
for( nX = 0L, nTmpX = nW - 1L, nTmp = nW - 2L; nX < nNewW; nX++ )
{
fTmp = nX * fRevScaleX;
if( bHMirr )
fTmp = nTmpX - fTmp;
// #98290# Do not use round to zero, otherwise last column will be missing
pMapIX[ nX ] = MinMax( (long) fTmp, 0, nTmp );
pMapFX[ nX ] = fTmp >= nTmp+1 ? 1048576 : 0;
}
// create vertical mapping table
for( nY = 0L, nTmpY = nH - 1L, nTmp = nH - 2L; nY < nNewH; nY++ )
{
fTmp = nY * fRevScaleY;
if( bVMirr )
fTmp = nTmpY - fTmp;
// #98290# Do not use round to zero, otherwise last row will be missing
pMapIY[ nY ] = MinMax( (long) fTmp, 0, nTmp );
pMapFY[ nY ] = 0;
pMapFY[ nY ] = fTmp >= nTmp+1 ? 1048576 : 0;
}
}