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Changed TIFF handler's monochrome conversion to look at the green channel instead of red.

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It's common when reducing a coloured image to greyscale or black and white to give the green channel more significance. Since we're only looking at a single channel use the green one instead of red.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@68783 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Dimitri Schoolwerth 2011-08-19 02:27:11 +00:00
parent 0e11090ef6
commit 7f77b25ea8
1 changed files with 2 additions and 2 deletions
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4
src/common/imagtiff.cpp
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@ -666,9 +666,9 @@ bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo
uint8 reverse = 0; uint8 reverse = 0;
for ( int bp = 0; bp < 8; bp++ ) for ( int bp = 0; bp < 8; bp++ )
{ {
if ( ptr[column*24 + bp*3] > 127 ) if ( ptr[column*24 + bp*3 + 1] > 127 )
{ {
// check only red as this is sufficient // check only green as this is sufficient
reverse = (uint8)(reverse | 128 >> bp); reverse = (uint8)(reverse | 128 >> bp);
} }
} }