6 Increase image/canvas size and synthesize outer band from edge of original.
12 1.0 lkk 5/15/2009 Initial version in scheme, released to Gimp Registry.
13 1.1 lkk 9/21/2009 Translate to python.
17 This program is free software; you can redistribute it and/or modify
18 it under the terms of the GNU General Public License as published by
19 the Free Software Foundation; either version 2 of the License, or
20 (at your option) any later version.
22 This program is distributed in the hope that it will be useful,
23 but WITHOUT ANY WARRANTY; without even the implied warranty of
24 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 GNU General Public License for more details.
27 The GNU Public License is available at
28 http://www.gnu.org/copyleft/gpl.html
32 widens the field of view, maintaining perspective of original
33 Should be undoable, except for loss of selection.
34 Should work on any image type, any count of layers and channels (although only active layer is affected.)
37 Scheme uses - in names, python uses _
38 Programming devt. cycle:
39 Initial creation: cp foo.py ~/.gimp-2.6/scripts, chmod +x, start gimp
40 Refresh: just copy, no need to restart gimp if the pdb registration is unchanged
42 IN: Nothing special. The selection is immaterial but is not preserved.
43 OUT larger layer and image. All other layers not enlarged.
48 gettext.install("resynthesizer", gimp.locale_directory, unicode=True)
50 def resizeImageCentered(image, percentEnlarge):
51 # resize and center image by percent (converted to pixel units)
52 deltaFraction = (percentEnlarge / 100) + 1.0
53 priorWidth = pdb.gimp_image_width(image)
54 priorHeight = pdb.gimp_image_height(image)
55 deltaWidth = priorWidth * deltaFraction
56 deltaHeight = priorHeight * deltaFraction
57 centeredOffX = (deltaWidth - priorWidth)/ 2
58 centeredOffY = (deltaHeight - priorHeight) / 2
59 pdb.gimp_image_resize(image, deltaWidth, deltaHeight, centeredOffX, centeredOffY)
60 #if not pdb.gimp_image_resize(image, deltaWidth, deltaHeight, centeredOffX, centeredOffY):
61 # raise RuntimeError, "Failed resize"
63 def shrinkSelectionByPercent(image, percent):
64 # shrink selection by percent (converted to pixel units)
65 deltaFraction = percent / 100
66 # convert to pixel dimensions
67 priorWidth = pdb.gimp_image_width(image)
68 priorHeight = pdb.gimp_image_height(image)
69 deltaWidth = priorWidth * deltaFraction
70 deltaHeight = priorHeight * deltaFraction
71 # !!! Note total shrink percentage is halved (width of band is percentage/2)
72 maxDelta = max(deltaWidth, deltaHeight) / 2
74 pdb.gimp_selection_shrink(image, maxDelta)
75 #if not pdb.gimp_selection_shrink(image, maxDelta):
76 # raise RuntimeError, "Failed shrink selection"
79 def uncrop(orgImage, drawable, percentEnlargeParam=10):
81 Create frisket stencil selection in a temp image to pass as source (corpus) to plugin resynthesizer,
82 which does the substantive work.
85 if not pdb.gimp_item_is_layer(drawable):
86 pdb.gimp_message(_("A layer must be active, not a channel."))
89 pdb.gimp_image_undo_group_start(orgImage)
91 # copy original into temp for later use
92 tempImage = pdb.gimp_image_duplicate(orgImage)
94 raise RuntimeError, "Failed duplicate image"
97 Prepare target: enlarge canvas and select the new, blank outer ring
100 # Save original bounds to later select outer band
101 pdb.gimp_selection_all(orgImage)
102 selectAllPrior = pdb.gimp_selection_save(orgImage)
103 # Resize image alone doesn't resize layer, so resize layer also
104 resizeImageCentered(orgImage, percentEnlargeParam)
105 pdb.gimp_layer_resize_to_image_size(drawable)
106 pdb.gimp_image_select_item(orgImage, CHANNEL_OP_REPLACE, selectAllPrior)
107 # select outer band, the new blank canvas.
108 pdb.gimp_selection_invert(orgImage)
109 # Assert target image is ready.
112 Prepare source (corpus) layer, a band at edge of original, in a dupe.
113 Note the width of corpus band is same as width of enlargement band.
115 # Working with the original size.
116 # Could be alpha channel transparency
117 workLayer = pdb.gimp_image_get_active_layer(tempImage)
119 raise RuntimeError, "Failed get active layer"
120 # Select outer band: select all, shrink
121 pdb.gimp_selection_all(tempImage)
122 shrinkSelectionByPercent(tempImage, percentEnlargeParam)
123 pdb.gimp_selection_invert(tempImage) # invert interior selection into a frisket
124 # Note that v1 resynthesizer required an inverted selection !!
125 # No need to crop corpus to save memory.
127 # Note that the API hasn't changed but use_border param now has more values.
128 # !!! The crux: use_border param=5 means inside out direction
129 pdb.plug_in_resynthesizer(orgImage, drawable, 0,0,5, workLayer.ID, -1, -1, 0.0, 0.117, 16, 500)
132 # Any errors now are moot.
133 pdb.gimp_selection_none(orgImage)
134 pdb.gimp_image_remove_channel(orgImage, selectAllPrior)
135 pdb.gimp_image_undo_group_end(orgImage)
136 pdb.gimp_displays_flush()
137 gimp.delete(tempImage) # Comment out to debug corpus creation.
142 N_("Enlarge image by synthesizing a border that matches the edge, maintaining perspective. Works best for small enlargement of natural edges. Undo a Crop instead, if possible! "),
143 "Requires separate resynthesizer plugin.",
145 "Copyright 2009 Lloyd Konneker",
150 (PF_IMAGE, "image", "Input image", None),
151 (PF_DRAWABLE, "drawable", "Input drawable", None),
152 (PF_SLIDER, "percentEnlargeParam", _("Percent enlargement"), 10, (0, 100, 1))
156 menu="<Image>/Filters/Enhance",
157 domain=("resynthesizer", gimp.locale_directory)