Cut out a vertical or horizontal slice of an image

cutout.py

@@ -0,0 +1,85 @@
+#!/usr/bin/env python
+
+# Cut out a selected band an image, either vertically or horizontally,
+# resizing the canvas appropriately afterward.
+# The selection must extend all the way across the image either
+# vertically or horizontally, but not both.
+
+from gimpfu import *
+
+def python_fu_cutout(img, drawable):
+    pdb.gimp_message_set_handler(MESSAGE_BOX)
+    exists, x1, y1, x2, y2 = pdb.gimp_selection_bounds(img)
+    orient = None
+
+    # Figure out whether we're cutting vertically or horizontally.
+    # It's ridiculously hard to make a selectin exactly the width or
+    # height of the image, so figure that 95% is close enough.
+    thresh = .05
+    if x1 < thresh * img.width and x2 > img.width * (1. - thresh):
+        orient = 'h'
+    if y1 <= thresh * img.height and y2 > img.height * (1. - thresh):
+        if orient:
+            pdb.gimp_message("Error: selection can't encompass entire image")
+            return
+        orient = 'v'
+    if not orient:
+        pdb.gimp_message("Must have a selection spanning entire width or height")
+        print "Selection is %d-%d x %d-%d" % (x1, x2, y1, y2)
+        return
+
+    # Now orient is either 'h' or 'v'.
+
+    img.undo_group_start()
+
+    if orient == 'h':
+        #pdb.gimp_rect_select(img, 0, y2, img.width, img.height,
+        #                     CHANNEL_OP_REPLACE, False, 0)
+        pdb.gimp_image_select_rectangle(img, CHANNEL_OP_REPLACE,
+                                        0, y2, img.width, img.height)
+        pdb.gimp_edit_cut(drawable)
+        #pdb.gimp_selection_none(img)
+        #pdb.gimp_rect_select(img, 0, y1, img.width, img.height - y2,
+        #                     CHANNEL_OP_REPLACE, False, 0)
+        pdb.gimp_image_select_rectangle(img, CHANNEL_OP_REPLACE,
+                                        0, y1, img.width, img.height - y2)
+        flayer = pdb.gimp_edit_paste(drawable, True)
+        #pdb.gimp_layer_translate(flayer, 0, y2)
+        pdb.gimp_floating_sel_anchor(flayer)
+        pdb.gimp_image_resize(img, img.width, y1 + img.height - y2, 0, 0)
+        pdb.gimp_selection_none(img)
+
+    elif orient == 'v':
+        pdb.gimp_image_select_rectangle(img, CHANNEL_OP_REPLACE,
+                                        x2, 0, img.width - x2, img.height)
+        pdb.gimp_edit_cut(drawable)
+
+        pdb.gimp_image_select_rectangle(img, CHANNEL_OP_REPLACE,
+                                        x1, 0, img.width - x2, img.height)
+        flayer = pdb.gimp_edit_paste(drawable, True)
+
+        pdb.gimp_floating_sel_anchor(flayer)
+        pdb.gimp_image_resize(img, x1 + img.width - x2, img.height, 0, 0)
+        pdb.gimp_selection_none(img)
+
+    img.undo_group_end()
+
+register(
+    "python_fu_cutout",
+    "Cut a selected band from an image, either vertically or horizontally",
+    "Cut a selected band from an image, either vertically or horizontally",
+    "Akkana Peck",
+    "Akkana Peck",
+    "2013",
+    "Cut out selected band",
+    "*",
+    [
+        (PF_IMAGE, "image", "Input image", None),
+        (PF_DRAWABLE, "drawable", "Input drawable", None),
+    ],
+    [],
+    python_fu_cutout,
+    menu = "<Image>/Filters/Distorts/"
+)
+
+main()