Metadata-Version: 1.1
Name: psd-tools
Version: 0.5
Summary: Python package for working with Adobe Photoshop PSD files
Home-page: https://github.com/kmike/psd-tools
Author: Mikhail Korobov
Author-email: kmike84@gmail.com
License: MIT License
Description: psd-tools
        =========
        
        ``psd-tools`` is a package for reading Adobe Photoshop PSD files
        (as described in specification_) to Python data structures.
        
        .. _specification: https://www.adobe.com/devnet-apps/photoshop/fileformatashtml/PhotoshopFileFormats.htm
        
        Installation
        ------------
        
        ::
        
            pip install psd-tools
        
        There are also optional dependencies:
        
        * docopt_ for command-line interface::
        
              pip install docopt
        
        * and PIL_ (or Pillow_) for accessing PSD layer data as PIL images::
        
              pip install Pillow
        
        .. note::
        
            In order to extract images from 32bit PSD files PIL/Pillow must be built
            with LITTLECMS support.
        
        .. _docopt: https://github.com/docopt/docopt
        .. _PIL: http://www.pythonware.com/products/pil/
        .. _Pillow: https://github.com/python-imaging/Pillow
        
        
        Usage
        -----
        
        Load an image::
        
            >>> from psd_tools import PSDImage
            >>> psd = PSDImage.load('my_image.psd')
        
        Read image header::
        
            >>> psd.header
            PsdHeader(number_of_channels=3, height=200, width=100, depth=8, color_mode=RGB)
        
        Access its layers::
        
            >>> psd.layers
            [<psd_tools.Group: 'Group 2', layer_count=1>,
             <psd_tools.Group: 'Group 1', layer_count=1>,
             <psd_tools.Layer: 'Background', size=100x200, x=0, y=0>]
        
        Work with a layer group::
        
            >>> group2 = psd.layers[0]
            >>> group2.name
            Group 2
        
            >>> group2.visible
            True
        
            >>> group2.closed
            False
        
            >>> group2.opacity
            255
        
            >>> from psd_tools.constants import BlendMode
            >>> group2.blend_mode == BlendMode.NORMAL
            True
        
            >>> group2.layers
            [<psd_tools.Layer: 'Shape 2', size=43x62, x=40, y=72)>]
        
        Work with a layer::
        
            >>> layer = group2.layers[0]
            >>> layer.name
            Shape 2
        
            >>> layer.bbox
            BBox(x1=40, y1=72, x2=83, y2=134)
        
            >>> layer.width, layer.height
            (43, 62)
        
            >>> layer.visible, layer.opacity, layer.blend_mode
            (True, 255, u'norm')
        
            >>> layer.as_PIL()
            <PIL.Image.Image image mode=RGBA size=43x62 at ...>
        
        Export a single layer::
        
            >>> layer_image = layer.as_PIL()
            >>> layer_image.save('layer.png')
        
        Export the merged image::
        
            >>> merged_image = psd.composite_image()
            >>> merged_image.save('my_image.png')
        
        
        Why yet another PSD reader?
        ---------------------------
        
        There are existing PSD readers for Python:
        
        * psdparse_;
        * pypsd_;
        * there is a PSD reader in PIL_ library;
        * it is possible to write Python plugins for GIMP_.
        
        PSD reader in PIL is incomplete and contributing to PIL
        is complicated because of the slow release process, but the main issue
        with PIL for me is that PIL doesn't have an API for layer groups.
        
        GIMP is cool, but it is a huge dependency, its PSD parser
        is not perfect and it is not easy to use GIMP Python plugin
        from *your* code.
        
        I also considered contributing to pypsd or psdparse, but they are
        GPL and I was not totally satisfied with the interface and the code
        (they are really fine, that's me having specific style requirements).
        
        So I finally decided to roll out yet another implementation
        that should be MIT-licensed, systematically based on the specification_
        (it turns out the specs are incomplete and sometimes incorrect though);
        parser should be implemented as a set of functions; the package should
        have tests and support both Python 2.x and Python 3.x.
        
        .. _GIMP: http://www.gimp.org/
        .. _psdparse: https://github.com/jerem/psdparse
        .. _pypsd: https://code.google.com/p/pypsd
        
        Design overview
        ---------------
        
        The process of handling a PSD file is splitted into 3 stages:
        
        1) "Reading": the file is read and parsed to low-level data
           structures that closely match the specification. No PIL images
           are constructed; image resources blocks and additional layer
           information are extracted but not parsed (they remain just keys
           with a binary data). The goal is to extract all information
           from a PSD file.
        
        2) "Decoding": image resource blocks and additional layer
           information blocks are parsed to a more detailed data structures
           (that are still based on a specification). There are a lot of PSD
           data types and the library currently doesn't handle them all, but
           it should be easy to add the parsing code for the missing PSD data
           structures if needed.
        
        After (1) and (2) we have an in-memory data structure that closely
        resembles PSD file; it should be fairly complete but very low-level
        and not easy to use. So there is a third stage:
        
        3) "User-facing API": PIL images of the PSD layers are created and
           combined to a user-friendly data structure.
        
        Stage separation also means user-facing API may be opinionated:
        if somebody doesn't like it then it should possible to build an
        another API (e.g. without PIL) based on lower-level decoded PSD file.
        
        ``psd-tools`` tries not to throw away information from the original
        PSD file; even if the library can't parse some info, this info
        will be likely available somewhere as raw bytes (open a bug if this is
        not the case). This should make it possible to modify and write PSD
        files (currently not implemented; contributions are welcome).
        
        Contributing
        ------------
        
        Development happens at github and bitbucket:
        
        * https://github.com/kmike/psd-tools
        * https://bitbucket.org/kmike/psd-tools
        
        The main issue tracker is at github: https://github.com/kmike/psd-tools/issues
        
        Feel free to submit ideas, bugs, pull requests (git or hg) or regular patches.
        
        In case of bugs it would be helpful to provide a small PSD file
        demonstrating the issue; this file may be added to a test suite.
        
        .. note::
        
            Unfortunately I don't have a license for Adobe Photoshop and use GIMP for
            testing; PNG screenshots may be necessary in cases where GIMP fails.
        
        In order to run tests, install `tox <http://tox.testrun.org>`_ and type
        
        ::
        
            tox
        
        from the source checkout.
        
        The license is MIT.
        
        Acknowledgments
        ---------------
        
        Thanks to all guys who write PSD parsers: I learned a lot about PSD
        file structure from the source code of psdparse_, GIMP_, libpsd_
        and `psdparse C library`_; special thanks to `Paint.NET PSD Plugin`_ authors
        for deciphering the "32bit layer + zip-with-prediction compression" case.
        
        .. _libpsd: http://sourceforge.net/projects/libpsd/
        .. _psdparse C library: http://telegraphics.com.au/svn/psdparse/trunk/
        .. _Paint.NET PSD Plugin: http://psdplugin.codeplex.com/
        
        
        0.5 (2012-11-05)
        ----------------
        
        - Support for zip and zip-with-prediction compression methods is added;
        - support for 16/32bit layers is added;
        - optional Cython extension for faster zip-with-prediction decompression;
        - other speed improvements.
        
        0.2 (2012-11-04)
        ----------------
        
        - Initial support for 16bit and 32bit PSD files: ``psd-tools`` v0.2 can
          read composite (merged) images for such files and extract information
          (names, dimensions, hierarchy, etc.) about layers and groups of 16/32bit PSD;
          extracting image data for distinct layers in 16/32bit PSD files is not
          suported yet;
        - better ``Layer.__repr__``;
        - ``bbox`` property for ``Group``.
        
        0.1.4 (2012-11-01)
        ------------------
        
        Packaging is fixed in this release.
        
        0.1.3 (2012-11-01)
        ------------------
        
        - Better support for 32bit images (still incomplete);
        - reader is able to handle "global" tagged layer info blocks that
          was previously discarded.
        
        0.1.2 (2012-10-30)
        ------------------
        
        - warn about 32bit images;
        - transparency support for composite images.
        
        0.1.1 (2012-10-29)
        ------------------
        
        Initial release (v0.1 had packaging issues).
        
Platform: UNKNOWN
Classifier: Development Status :: 4 - Beta
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.6
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.2
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Classifier: Topic :: Multimedia :: Graphics
Classifier: Topic :: Multimedia :: Graphics :: Viewers
Classifier: Topic :: Multimedia :: Graphics :: Graphics Conversion
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Requires: docopt
Requires: Pillow
