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Slice and scale 9-patch images

Project description

Slice Android style 9-patch images, resize and interactively preview them.

Travis CI

See https://developer.android.com/tools/help/draw9patch.html for a 9-patch description.

Example image

Installation

If you want to use the interactive viewer read the additional installation notes under “Interactive viewer”.

$ pip install ninepatch

Python usage

from ninepatch import Ninepatch
ninepatch = Ninepatch('ninepatch_bubble.9.png')
print(ninepatch.content_area)  # content_area(left=23, top=20, right=27, bottom=59)
scaled_image = ninepatch.render(500, 400) # creates a new PIL image

Command line usage

Your image must be a PNG image with a transparent background. The scale and fill guide color must be 100% opaque black.

Scale and open image in a viewer (PIL image.show()):

$ ninepatch render ninepatch_bubble.9.png 300 300

Save the scaled image to a new file:

$ ninepatch render ninepatch_bubble.9.png 300 300 scaled.png
https://raw.githubusercontent.com/vindolin/ninepatch/master/ninepatch/data/ninepatch_bubble_300x300.png

Slice the 9patch into tiles:

$ ninepatch slice ninepatch_bubble.9.png ./outputdir
https://raw.githubusercontent.com/vindolin/ninepatch/master/ninepatch/data/slice_export.png

Interactive viewer

ninepatch viewer screenshot

Interactively resize and preview an image in a Tkinter viewer:

$ ninepatch_viewer ninepatch_bubble.9.png

or just:

$ ninepatch_viewer

without arguments to see the demo image

If you want to use the viewer then python-pil.imagetk has to be installed.

On Ubuntu do:

$ sudo apt-get install python-pil.imagetk

If you want to install into a virtualenv, pip needs the following packages to compile PIL with Tkinter support:

$  sudo apt-get install python-tk tk8.6-dev

(You can trigger a recompile of PIL with: “pip install -I ninepatch”)

Changelog

0.1.19
  • fixed error in caching

0.1.18
  • optional caching for slice() and render()

0.1.17
  • new method export_slices()

  • changed command line parameters (render/slice)

0.1.10
  • missing guides are now handled properly

0.1.9
  • parse the fill area

  • switched to setuptools

0.1.4
  • added Tkinter viewer

Notes

I wrote this tool for the ninepatch_actor.py in my Clutter example project: https://github.com/vindolin/Clutter-Python-examples

Issues

TODO

Project details


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ninepatch-0.1.19.tar.gz (12.8 kB view hashes)

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