possible bug -layers merge IM 7.0.4.5 Q16 Mac OSX
Posted: 2017-01-23T20:23:22-07:00
It seems that -layers merge is causing a difference in creating drop shadow in IM 7.0.4.5 Q16 non-hdri compared to IM 6.9.7.5 Q16 non-hdri. The result from IM 7 has partial transparency in the main part of the image (as opposed to the shadow area) and has transparency on the top and left side of the output.
If I save the 2 images from the -shadow command and do a compare, the result is 0. So this leads me to believe it is a layer merge issue.
Input:
IM 7:
IM 6:
Animation showing difference:
If I save the 2 images from the -shadow command and do a compare, the result is 0. So this leads me to believe it is a layer merge issue.
Input:
IM 7:
Code: Select all
magick sample.png \
\( +clone -background black -shadow 80x3+5+5 \) \
+swap -background none -layers merge +repage sample_result7.pngIM 6:
Code: Select all
convert sample.png \
\( +clone -background black -shadow 80x3+5+5 \) \
+swap -background none -layers merge +repage sample_result6.pngAnimation showing difference: