Re: Transparency not saved on OSX
Bob Friesenhahn <[email protected]>
| Newsgroups | gmane.comp.video.graphicsmagick.help |
|---|---|
| Message-ID | <[email protected]> |
On Thu, 11 May 2017, Anubhaw Arya wrote: > Hello all, > > I’m trying to create a transparent gradient image as I would in ImageMagick in GraphicsMagick. The following command works for me in IM: > convert -size 1280x720 -define gradient:direction=SouthWest gradient:'rgba(0,255,0,0.0)'-'rgba(0,255,0,1.0)' im.png > and generates the attached output. > > However, if I run the same command in GM: > gm convert -size 1280x720 -define gradient:direction=SouthWest gradient:'rgba(0,255,0,0.0)'-'rgba(0,255,0,1.0)' gm.png > I get the attached output. As you can see, it is a solid color. It is not correct to use current ImageMagick options/commands with GraphicsMagick without verification since the programs have diverged over the past 15 years. The "gradient:direction" is not supported (as far as I am aware) It seems that the remaining problem must be with enabling the 'matte' flag based on the color specification, and possibly with producing the gradient in the opacity channel. This would be a GraphicsMagick bug. It would be good to create a formal bug report for this so that it is not forgotten. Bob -- Bob Friesenhahn [email protected], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Graphicsmagick-help mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/graphicsmagick-help