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  • Zach van Rijn's avatar
    Switch from Imagemagick to Graphicsmagick. · a656ccfe
    Zach van Rijn authored
    Note that GM doesn't support gradient:angle so we
    have to use a direction. It's radial, not linear,
    but is completely acceptable.
    Imagemagick silently introduces artifacts and fails
    to composite images when the underlying gradient is
    of the form { #AAAAAA --> #BBBBBB }, where R=G=B.
    Note that { #AAAAAA --> #BBBBBC } works fine. This
    is a real bug but isn't a wallpapers problem.
    Add a 'prepare-docker' wrapper script, which simply
    builds the tarball using a known Graphicsmagick and
    not whichever happens to be on the generating system.