diff options
Diffstat (limited to 'vcl/source')
| -rw-r--r-- | vcl/source/gdi/pngread.cxx | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/vcl/source/gdi/pngread.cxx b/vcl/source/gdi/pngread.cxx index bc218f8d9964..7a1f8ef46136 100644 --- a/vcl/source/gdi/pngread.cxx +++ b/vcl/source/gdi/pngread.cxx @@ -1328,6 +1328,22 @@ void PNGReaderImpl::ImplDrawScanline( sal_uInt32 nXStart, sal_uInt32 nXAdd ) for ( long nX = nXStart; nX < maOrigSize.Width(); nX += nXAdd, pTmp++ ) ImplSetAlphaPixel( nY, nX, *pTmp, mpTransTab[ *pTmp ] ); } + else if (mnPngDepth == 1 ) + { + for ( long nX = nXStart, nShift = 0; nX < maOrigSize.Width(); nX += nXAdd ) + { + nShift = (nShift - 1) & 7; + + sal_uInt8 nCol; + if ( nShift == 0 ) + nCol = *(pTmp++); + else + nCol = static_cast<sal_uInt8>( *pTmp >> nShift ); + nCol &= 1; + + ImplSetAlphaPixel( nY, nX, nCol, mpTransTab[ nCol ] ); + } + } else { for ( long nX = nXStart; nX < maOrigSize.Width(); nX += nXAdd, pTmp += 2 ) |