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[SOLVED] composite with mask ignores mask on Mac
Posted: 2017-09-20T04:13:00-07:00
by smotesko
Hello
I'm using composite with a B/W mask to compose two images.
On Mac I've got version
7.0.7-1 Q16 x86_64 2017-09-10. On Linux
6.7.7-10 2017-07-31 Q16.
First I've discovered it doesn't work as described in
documentation on Mac, then I've checked on Linux and there it works fine.
Code: Select all
composite righthalf.jpg lefthalf.jpg mask.gif Mac.jpg
composite righthalf.jpg lefthalf.jpg mask.gif Linux.jpg
Here are all the image files mentioned:
- righthalf.jpg
- lefthalf.jpg
- mask.gif
- Mac.jpg
- Linux.jpg
Re: composite with mask ignores mask on Mac
Posted: 2017-09-20T07:08:04-07:00
by GeeMack
smotesko wrote: ↑2017-09-20T04:13:00-07:00First I've discovered it doesn't work as described in
documentation on Mac, then I've checked on Linux and there it works fine.
Code: Select all
composite righthalf.jpg lefthalf.jpg mask.gif Mac.jpg
composite righthalf.jpg lefthalf.jpg mask.gif Linux.jpg
The alpha handling has changed between v6 and v7. Try adding "-alpha set" after "composite".
Code: Select all
composite -alpha set righthalf.jpg lefthalf.jpg mask.gif Mac.jpg
Re: composite with mask ignores mask on Mac
Posted: 2017-09-20T09:07:24-07:00
by fmw42
I would suggest you start using the convert .... -composite syntax rather than composite. Composite is very old syntax and very limited compared to convert. See the difference in syntax at
http://www.imagemagick.org/Usage/compose/#compose. The first two input images are swapped in convert syntax. So
Code: Select all
convert lefthalf.jpg righthalf.jpg mask.gif -composite Mac.jpg
Also in IM 7, you must add magick before composite. So it would be
Code: Select all
magick composite righthalf.jpg lefthalf.jpg mask.gif Mac.jpg
Re: composite with mask ignores mask on Mac
Posted: 2017-09-20T12:14:45-07:00
by smotesko
GeeMack wrote: ↑2017-09-20T07:08:04-07:00
The alpha handling has changed between v6 and v7. Try adding "-alpha set" after "composite".
Code: Select all
composite -alpha set righthalf.jpg lefthalf.jpg mask.gif Mac.jpg
fmw42 wrote: ↑2017-09-20T09:07:24-07:00
I would suggest you start using the convert .... -composite syntax rather than composite. Composite is very old syntax and very limited compared to convert. See the difference in syntax at
http://www.imagemagick.org/Usage/compose/#compose. The first two input images are swapped in convert syntax. So
Code: Select all
convert lefthalf.jpg righthalf.jpg mask.gif -composite Mac.jpg
Thanks! Both these solutions fixed my problem in v.7
I'm going to use `convert -composite` from now on.
Re: [SOLVED] composite with mask ignores mask on Mac
Posted: 2017-09-20T14:51:09-07:00
by fmw42
For IM 7 change convert to magick. Do not use magick convert or convert.