background/Makefile

   1 all: background-1024.jpg background-1920.jpg background-3177.jpg
   2
   3 background-1024.jpg: background.xcf
   4         convert -adaptive-resize 1024x -quality 70 background.xcf background-1024.jpg
   5         jpegoptim background-1024.jpg
   6
   7 background-1920.jpg: background.xcf
   8         convert -adaptive-resize 1920x -quality 70 background.xcf background-1920.jpg
   9         jpegoptim background-1920.jpg
  10
  11 background-3177.jpg: background.xcf
  12         convert -adaptive-resize 3177x -quality 70 background.xcf background-3177.jpg
  13         jpegoptim background-3177.jpg
  14