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68 lines
3.0 KiB
ReStructuredText
68 lines
3.0 KiB
ReStructuredText
.. py:module:: PIL.features
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.. py:currentmodule:: PIL.features
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:py:mod:`~PIL.features` Module
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==============================
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The :py:mod:`PIL.features` module can be used to detect which Pillow features are available on your system.
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.. autofunction:: PIL.features.pilinfo
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.. autofunction:: PIL.features.check
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.. autofunction:: PIL.features.version
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.. autofunction:: PIL.features.get_supported
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Modules
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-------
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Support for the following modules can be checked:
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* ``pil``: The Pillow core module, required for all functionality.
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* ``tkinter``: Tkinter support.
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* ``freetype2``: FreeType font support via :py:func:`PIL.ImageFont.truetype`.
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* ``littlecms2``: LittleCMS 2 support via :py:mod:`PIL.ImageCms`.
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* ``webp``: WebP image support.
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.. autofunction:: PIL.features.check_module
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.. autofunction:: PIL.features.version_module
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.. autofunction:: PIL.features.get_supported_modules
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Codecs
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------
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Support for these is only checked during Pillow compilation.
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If the required library was uninstalled from the system, the ``pil`` core module may fail to load instead.
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Except for ``jpg``, the version number is checked at run-time.
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Support for the following codecs can be checked:
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* ``jpg``: (compile time) Libjpeg support, required for JPEG based image formats. Only compile time version number is available.
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* ``jpg_2000``: (compile time) OpenJPEG support, required for JPEG 2000 image formats.
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* ``zlib``: (compile time) Zlib support, required for zlib compressed formats, such as PNG.
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* ``libtiff``: (compile time) LibTIFF support, required for TIFF based image formats.
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.. autofunction:: PIL.features.check_codec
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.. autofunction:: PIL.features.version_codec
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.. autofunction:: PIL.features.get_supported_codecs
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Features
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--------
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Some of these are only checked during Pillow compilation.
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If the required library was uninstalled from the system, the relevant module may fail to load instead.
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Feature version numbers are available only where stated.
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Support for the following features can be checked:
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* ``libjpeg_turbo``: (compile time) Whether Pillow was compiled against the libjpeg-turbo version of libjpeg. Compile-time version number is available.
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* ``zlib_ng``: (compile time) Whether Pillow was compiled against the zlib-ng version of zlib. Compile-time version number is available.
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* ``raqm``: Raqm library, required for ``ImageFont.Layout.RAQM`` in :py:func:`PIL.ImageFont.truetype`. Run-time version number is available for Raqm 0.7.0 or newer.
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* ``libimagequant``: (compile time) ImageQuant quantization support in :py:func:`PIL.Image.Image.quantize`. Run-time version number is available.
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* ``xcb``: (compile time) Support for X11 in :py:func:`PIL.ImageGrab.grab` via the XCB library.
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* ``transp_webp``: Deprecated. Always ``True`` if WebP module is installed.
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* ``webp_mux``: Deprecated. Always ``True`` if WebP module is installed.
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* ``webp_anim``: Deprecated. Always ``True`` if WebP module is installed.
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.. autofunction:: PIL.features.check_feature
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.. autofunction:: PIL.features.version_feature
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.. autofunction:: PIL.features.get_supported_features
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