I often mockup iPhone interfaces on the
Gimp, then exporting each layer for use as backgrounds. For iOS 4 each image needs to be exported twice: one at full resolution with
@2x in its filename, and once at half-resolution without the
@2x. e.g.
nav_bg@2x.png and
nav_bg.png.
Exporting layers by hand gets old real quick. Thankfully the Gimp supports scripting in my favourite language: python. Even better, Chris Mohler had already written a script to do something very similar, so all I needed to do was make some simple adjustments:
#!/usr/bin/env python
# -*- coding: <utf-8> -*-
# Author: Chris Mohler <cr33dog@gmail.com>
# Copyright 2009 Chris Mohler
# "Only Visible" and filename formatting introduced by mh
# License: GPL v3+
# Version 0.4
# GIMP plugin to export layers as PNGs
# modified by Shuning Bian 2011
from gimpfu import *
import os, re
gettext.install("gimp20-python", gimp.locale_directory, unicode=True)
def format_filename(layer):
layername = layer.name.decode('utf-8')
filename1 = layername + "@2x.png"
filename2 = layername + ".png"
return filename1,filename2
def get_layers_to_export(img):
layers = []
for layer in img.layers:
if layer.visible:
layers.append(layer)
return layers
def export_layers(img, path):
dupe = img.duplicate()
savelayers = get_layers_to_export(dupe)
for layer in dupe.layers:
layer.visible = 0
for layer in dupe.layers:
if layer in savelayers:
layer.visible = 1
if layer.mask:
pdb.gimp_layer_remove_mask(layer, 0)
filename1,filename2 = format_filename(layer)
fullpath = os.path.join(path, filename1);
tmp = dupe.duplicate()
pdb.file_png_save(tmp, tmp.layers[0], fullpath, filename1, 0, 9, 1, 1, 1, 1, 1)
imgwidth = pdb.gimp_image_width(img)
imgheight = pdb.gimp_image_height(img)
pdb.gimp_image_scale_full(tmp, imgwidth/2, imgheight/2, 2)
fullpath = os.path.join(path, filename2)
pdb.file_png_save(tmp, tmp.layers[0], fullpath, filename2, 0, 9, 1, 1, 1, 1, 1)
dupe.remove_layer(layer)
register(
proc_name=("python-fu-export-layers-iphone4"),
blurb=("Export visible layers as PNG"),
help=("Export all visible layers as individual PNG files."),
author=("Chris Mohler <cr33dog@gmail.com> + sbian"),
copyright=("Chris Mohler"),
date=("2009"),
label=("as _PNG"),
imagetypes=("*"),
params=[
(PF_IMAGE, "img", "Image", None),
(PF_DIRNAME, "path", "Save PNGs here", os.getcwd()),
],
results=[],
function=(export_layers),
menu=("<Image>/File/E_xport Layers"),
domain=("gimp20-python", gimp.locale_directory)
)
main()
Cheers,
Steve
Err99 is a somwhat common error encountered by Canon DSLR users. Because it is something of a catch-all error code a variety of causes and resolutions can be found via google. In my case the error was fixed by a firmware upgrade while it was in the hands of Canon camera servicing personnel, so if you find you have exhausted all options, send it back to Canon!
