imposition with 1 or 2 pages

imposition.py

@@ -11,10 +11,11 @@ from random import shuffle
 p = ArgumentParser(description='Script converts 8 images (jpg or png) from a given directory into a single page 4x2 imposition. Example: python imposition.py --dir imgs/  --size a3 --order random ')
 p.add_argument("--dir", metavar='', default='', required=True, help="Image directory, which stores the source images for the imposition")
 p.add_argument("--size", metavar='', default="A4", choices=['A4','a4','A3','a3'], help="Size of the printing sheet: A4 or A3. Default:A4")
+p.add_argument("--pages", metavar='', type=int, choices=[1,2], default=1, help="Number of imposition pages. Default:1. Currently only 1 or 2 pages impositions are available.")
 p.add_argument("--order", metavar='', default="alphabet", choices=["alphabet", "reverse", "random"], help="Image distribution Order in the imposition. Possible Values: alphabet (alphabetically) , reverse (reverse alphabetically), random. Default: alphabet")
 p.add_argument("--output", metavar='' ,default="output.pdf", help="Output file. Can either be a pdf, jpg or png. Default: output.pdf")
 args = p.parse_args()
-
+print args
 temp_dir = tempfile.mkdtemp()
 
 # dimensions
@@ -43,10 +44,15 @@ elif args.order == 'random':
     shuffle(listdir)    
     listdir_order = listdir
 
-print listdir_order
-listdir_order = listdir_order[0:8]
-pagenumbers = [2,5,4,3,1,6,7,0] # from from top left to bottom right ( order in imagemagick creates mosaic)
-listdir_order = [listdir_order[n] for n in pagenumbers] # reorder according to pagenumbers
+# print listdir_order
+if args.pages == 1:
+    listdir_order = listdir_order[0:8]
+    pagenumbers = [2,5,4,3,1,6,7,0] # from from top left to bottom right ( order in imagemagick creates mosaic)
+elif args.pages == 2:
+    listdir_order = listdir_order[0:16]
+    pagenumbers = [4,11,8,7,3,12,15,0,6,9,10,5,1,14,13,2]
+
+listdir_order = [listdir_order[n] for n in pagenumbers] # reorder files according to pagenumbers
 print 'selected files according to pagenumbers:', listdir_order
 
 # image conversion: -extent
@@ -60,30 +66,39 @@ for n, img in enumerate(listdir_order):
     cmd_convert_l = shlex.split(cmd_convert)
     subprocess.call(cmd_convert_l)
     
-# montage
-## order & rotation
-tmpfiles_top =  tmpfiles[0:4] # top row will be rotated in the mosaic
-tmpfiles_top = ' '.join(tmpfiles_top)
-tmpfiles_bottom = tmpfiles[4:8]
-tmpfiles_bottom = ' '.join(tmpfiles_bottom)
+# # montage
 tmp_output = (temp_dir +'/'+'output.jpg')
-# command
-template_montage = "montage -geometry +1+1 -tile 4x2  \( -rotate 180 {topfiles} \) {bottomfiles}  {output}"
-cmd_montage = template_montage.format(topfiles=tmpfiles_top,
-                                      bottomfiles=tmpfiles_bottom,
+
+if args.pages == 1:
+    template_montage = "montage -geometry +1+1 -tile 4x2  \( -rotate 180 {topfiles_p1} \) {bottomfiles_p1} {output}"
+    cmd_montage = template_montage.format(
+        topfiles_p1=' '.join(tmpfiles[:4]),
+        bottomfiles_p1=' '.join(tmpfiles[4:8]),
         output = tmp_output)
+elif args.pages == 2:
+    template_montage = "montage -geometry +1+1 -tile 4x2  \( -rotate 180 {topfiles_p1} \) {bottomfiles_p1} \( -rotate 180 {topfiles_p2} \) {bottomfiles_p2}  {output}"
+    cmd_montage = template_montage.format(
+        topfiles_p1=' '.join(tmpfiles[:4]),
+        bottomfiles_p1=' '.join(tmpfiles[4:8]),
+        topfiles_p2=' '.join(tmpfiles[8:12]),
+        bottomfiles_p2=' '.join(tmpfiles[12:]),                                   output = tmp_output)
+
+print 'Create montage cmd {}: '.format( cmd_montage )
 cmd_montage_l = shlex.split(cmd_montage)
 subprocess.call(cmd_montage_l)
 
-# resize output
+# # resize output
+tmp_output_files =[ (temp_dir+'/'+f) for f in (os.listdir(temp_dir)) if 'output' in f]  #if more than 1 files results from montage
+tmp_output_files = " ".join(tmp_output_files) # make into string
 output_f = os.path.abspath('./'+args.output)
 template_convert = "convert {input_f} -resize {w}x{h} -units PixelsPerInch -density 300x300 {output}"
 cmd_convert = template_convert.format(
-    input_f= tmp_output,
+    input_f= tmp_output_files,
     w=size_sheet[0],
     h=size_sheet[1],
     output=output_f)
 cmd_convert_l = shlex.split(cmd_convert)
+print 'Convert montage to {} cmd: {}'.format(args.output, cmd_convert)
 subprocess.call(cmd_convert_l)
 
 print '** imposition save in', output_f, '**'