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--[[
Copyright (c) 2007 Gordon Gremme <gordon@gremme.org>
Copyright (c) 2007 Center for Bioinformatics, University of Hamburg
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
]]
require 'gtlua'
function usage()
io.stderr:write(string.format("Usage: %s PNG_dir\n", arg[0]))
io.stderr:write("Display numbered PNG files in PNG_dir.\n")
os.exit(1)
end
if #arg == 1 then
png_dir = arg[1]
-- make sure png_dir is a directory
rval, err = lfs.attributes(png_dir, "mode")
if rval ~= "directory" then
io.stderr:write(string.format("PNG_dir '%s' is not a directory\n", png_dir))
os.exit(1)
end
else
usage()
end
filenumber = 1
while (true) do
local filename = png_dir .. "/" .. filenumber .. ".png"
if gt.file_exists(filename) then
gt.display(filename)
filenumber = filenumber + 1
else
break
end
end
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