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Switch to using pillow for png as well. (#15193)
Switch to using pillow for png as well.
2 parents 327df3b + 370e9a2 commit be978a3

25 files changed

+246
-1039
lines changed

‎.appveyor.yml

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@@ -60,7 +60,7 @@ install:
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# if conda-forge gets a new pyqt, it might be nice to install it as well to have more backends
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# https://github.com/conda-forge/conda-forge.github.io/issues/157#issuecomment-223536381
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- conda create -q -n test-environment python=%PYTHON_VERSION%
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freetype=2.6 "libpng>=1.6.21,<1.7" zlib=1.2 tk=8.5
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freetype=2.6 zlib=1.2 tk=8.5
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pip setuptools numpy sphinx tornado
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- activate test-environment
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- echo %PYTHON_VERSION% %TARGET_ARCH%
@@ -81,11 +81,9 @@ test_script:
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# Now build the thing..
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- set LINK=/LIBPATH:%cd%\lib
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- pip install -ve .
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# these should show no z, png, or freetype dll...
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# these should show no z or freetype dll...
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- set "DUMPBIN=%VS140COMNTOOLS%\..\..\VC\bin\dumpbin.exe"
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- 'if x%MPLSTATICBUILD% == xTrue "%DUMPBIN%" /DEPENDENTS lib\matplotlib\ft2font*.pyd | findstr freetype.*.dll && exit /b 1 || exit /b 0'
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- 'if x%MPLSTATICBUILD% == xTrue "%DUMPBIN%" /DEPENDENTS lib\matplotlib\_png*.pyd | findstr z.*.dll && exit /b 1 || exit /b 0'
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- 'if x%MPLSTATICBUILD% == xTrue "%DUMPBIN%" /DEPENDENTS lib\matplotlib\_png*.pyd | findstr png.*.dll && exit /b 1 || exit /b 0'
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# this are optional dependencies so that we don't skip so many tests...
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- if x%TEST_ALL% == xyes conda install -q ffmpeg inkscape miktex pillow

‎INSTALL.rst

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@@ -99,7 +99,7 @@ toolchain is prefixed. This may be used for cross compiling. ::
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export PKG_CONFIG=x86_64-pc-linux-gnu-pkg-config
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Once you have satisfied the requirements detailed below (mainly
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Python, NumPy, libpng and FreeType), you can build Matplotlib.
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Python, NumPy, and FreeType), you can build Matplotlib.
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::
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cd matplotlib
@@ -121,7 +121,6 @@ Matplotlib requires the following dependencies:
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* `Python <https://www.python.org/downloads/>`_ (>= 3.6)
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* `FreeType <https://www.freetype.org/>`_ (>= 2.3)
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* `libpng <http://www.libpng.org>`_ (>= 1.2)
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* `NumPy <http://www.numpy.org>`_ (>= 1.11)
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* `setuptools <https://setuptools.readthedocs.io/en/latest/>`_
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* `cycler <http://matplotlib.org/cycler/>`_ (>= 0.10.0)
@@ -177,8 +176,8 @@ etc., you can install the following:
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.. _pkg-config: https://www.freedesktop.org/wiki/Software/pkg-config/
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If not using pkg-config (in particular on Windows), you may need to set the
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include path (to the FreeType, libpng, and zlib headers) and link path (to
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the FreeType, libpng, and zlib libraries) explicitly, if they are not in
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include path (to the FreeType and zlib headers) and link path (to
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the FreeType and zlib libraries) explicitly, if they are not in
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standard locations. This can be done using standard environment variables
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-- on Linux and OSX:
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@@ -195,8 +194,8 @@ etc., you can install the following:
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set LINK=/LIBPATH:C:\directory\containing\freetype.lib ...
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where ``...`` means "also give, in the same format, the directories
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containing ``png.h`` and ``zlib.h`` for the include path, and for
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``libpng.so``/``png.lib`` and ``libz.so``/``z.lib`` for the link path."
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containing ``zlib.h`` for the include path, and for
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``libz.so``/``z.lib`` for the link path."
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.. note::
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@@ -237,20 +236,20 @@ Building on macOS
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-----------------
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The build situation on macOS is complicated by the various places one
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can get the libpng and FreeType requirements (MacPorts, Fink,
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can get FreeType (MacPorts, Fink,
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/usr/X11R6), the different architectures (e.g., x86, ppc, universal), and
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the different macOS versions (e.g., 10.4 and 10.5). We recommend that you build
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the way we do for the macOS release: get the source from the tarball or the
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git repository and install the required dependencies through a third-party
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package manager. Two widely used package managers are Homebrew, and MacPorts.
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The following example illustrates how to install libpng and FreeType using
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The following example illustrates how to install FreeType using
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``brew``::
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brew install libpng freetype pkg-config
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brew install freetype pkg-config
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If you are using MacPorts, execute the following instead::
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port install libpng freetype pkgconfig
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port install freetype pkgconfig
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After installing the above requirements, install Matplotlib from source by
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executing::
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for how to set up a build environment.
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Since there is no canonical Windows package manager, the methods for building
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FreeType, zlib, and libpng from source code are documented as a build script
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FreeType and zlib from source code are documented as a build script
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at `matplotlib-winbuild <https://github.com/jbmohler/matplotlib-winbuild>`_.
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There are a few possibilities to build Matplotlib on Windows:
@@ -290,17 +289,16 @@ Wheel builds using conda packages
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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This is a wheel build, but we use conda packages to get all the requirements.
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The binary requirements (png, FreeType,...) are statically linked and therefore
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not needed during the wheel install.
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FreeType is statically linked and therefore not needed during the wheel install.
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Set up the conda environment. Note, if you want a qt backend, add ``pyqt`` to
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the list of conda packages.
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::
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conda create -n "matplotlib_build" python=3.7 numpy python-dateutil pyparsing tornado cycler tk libpng zlib freetype
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conda create -n "matplotlib_build" python=3.7 numpy python-dateutil pyparsing tornado cycler tk zlib freetype
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conda activate matplotlib_build
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# force the build against static libpng and zlib libraries
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# force the build against static zlib libraries
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set MPLSTATICBUILD=True
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python setup.py bdist_wheel
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‎ci/azure-pipelines-steps.yml

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@@ -21,12 +21,8 @@ steps:
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displayName: 'Use latest available Nuget'
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- script: |
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nuget install libpng-msvc14-x64 -ExcludeVersion -OutputDirectory "$(build.BinariesDirectory)"
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nuget install zlib-msvc14-x64 -ExcludeVersion -OutputDirectory "$(build.BinariesDirectory)"
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echo ##vso[task.prependpath]$(build.BinariesDirectory)\libpng-msvc14-x64\build\native\bin_release
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echo ##vso[task.prependpath]$(build.BinariesDirectory)\zlib-msvc14-x64\build\native\bin_release
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echo ##vso[task.setvariable variable=CL]/I$(build.BinariesDirectory)\libpng-msvc14-x64\build\native\include /I$(build.BinariesDirectory)\zlib-msvc14-x64\build\native\include
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echo ##vso[task.setvariable variable=LINK]/LIBPATH:$(build.BinariesDirectory)\libpng-msvc14-x64\build\native\lib_release /LIBPATH:$(build.BinariesDirectory)\zlib-msvc14-x64\build\native\lib_release
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displayName: 'Install dependencies with nuget'
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‎doc/api/next_api_changes/development.rst

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@@ -1,2 +1,13 @@
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Development changes
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-------------------
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Matplotlib now uses Pillow to save and read pngs
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6+
7+
The builtin png encoder and decoder has been removed, and Pillow is now a
8+
dependency. Note that when reading 16-bit RGB(A) images, Pillow truncates them
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to 8-bit precision, whereas the old builtin decoder kept the full precision.
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11+
The deprecated wx backend (not wxagg!) now always uses wx's builtin jpeg and
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tiff support rather than relying on Pillow for writing these formats; this
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behavior is consistent with wx's png output.

‎doc/devel/min_dep_policy.rst

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@@ -60,7 +60,7 @@ minimum Python and numpy.
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System and C-dependencies
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=========================
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For system or c-dependencies (libpng, freetype, GUI frameworks, latex,
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For system or C-dependencies (FreeType, GUI frameworks, LaTeX,
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gs, ffmpeg) support as old as practical. These can be difficult to
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install for end-users and we want to be usable on as many systems as
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possible. We will bump these on a case-by-case basis.

‎examples/misc/image_thumbnail_sgskip.py

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@@ -4,10 +4,10 @@
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===============
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You can use matplotlib to generate thumbnails from existing images.
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matplotlib natively supports PNG files on the input side, and other
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image types transparently if your have PIL installed
9-
7+
Matplotlib relies on Pillow_ for reading images, and thus supports all formats
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supported by Pillow.
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.. _Pillow: http://python-pillow.org/
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"""
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# build thumbnails of all images in a directory

‎lib/matplotlib/animation.py

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@@ -543,10 +543,6 @@ def cleanup(self):
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class PillowWriter(MovieWriter):
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@classmethod
545545
def isAvailable(cls):
546-
try:
547-
import PIL
548-
except ImportError:
549-
return False
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return True
551547

552548
def __init__(self, *args, **kwargs):

‎lib/matplotlib/backend_bases.py

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from matplotlib.transforms import Affine2D
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from matplotlib.path import Path
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56-
try:
57-
from PIL import PILLOW_VERSION
58-
from distutils.version import LooseVersion
59-
if LooseVersion(PILLOW_VERSION) >= "3.4":
60-
_has_pil = True
61-
else:
62-
_has_pil = False
63-
del PILLOW_VERSION
64-
except ImportError:
65-
_has_pil = False
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_log = logging.getLogger(__name__)
68-
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_default_filetypes = {
70-
'ps': 'Postscript',
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'eps': 'Encapsulated Postscript',
60+
'jpg': 'Joint Photographic Experts Group',
61+
'jpeg': 'Joint Photographic Experts Group',
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'pdf': 'Portable Document Format',
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'pgf': 'PGF code for LaTeX',
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'png': 'Portable Network Graphics',
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'ps': 'Postscript',
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'raw': 'Raw RGBA bitmap',
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'rgba': 'Raw RGBA bitmap',
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'svg': 'Scalable Vector Graphics',
78-
'svgz': 'Scalable Vector Graphics'
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'svgz': 'Scalable Vector Graphics',
70+
'tif': 'Tagged Image File Format',
71+
'tiff': 'Tagged Image File Format',
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}
80-
81-
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_default_backends = {
83-
'ps': 'matplotlib.backends.backend_ps',
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'eps': 'matplotlib.backends.backend_ps',
75+
'jpg': 'matplotlib.backends.backend_agg',
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'jpeg': 'matplotlib.backends.backend_agg',
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'pdf': 'matplotlib.backends.backend_pdf',
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'pgf': 'matplotlib.backends.backend_pgf',
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'png': 'matplotlib.backends.backend_agg',
80+
'ps': 'matplotlib.backends.backend_ps',
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'raw': 'matplotlib.backends.backend_agg',
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'rgba': 'matplotlib.backends.backend_agg',
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'svg': 'matplotlib.backends.backend_svg',
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'svgz': 'matplotlib.backends.backend_svg',
85+
'tif': 'matplotlib.backends.backend_agg',
86+
'tiff': 'matplotlib.backends.backend_agg',
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}
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@@ -1604,17 +1599,6 @@ class FigureCanvasBase:
16041599
fixed_dpi = None
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16061601
filetypes = _default_filetypes
1607-
if _has_pil:
1608-
# JPEG support
1609-
register_backend('jpg', 'matplotlib.backends.backend_agg',
1610-
'Joint Photographic Experts Group')
1611-
register_backend('jpeg', 'matplotlib.backends.backend_agg',
1612-
'Joint Photographic Experts Group')
1613-
# TIFF support
1614-
register_backend('tif', 'matplotlib.backends.backend_agg',
1615-
'Tagged Image File Format')
1616-
register_backend('tiff', 'matplotlib.backends.backend_agg',
1617-
'Tagged Image File Format')
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16191603
@cbook._classproperty
16201604
def supports_blit(cls):

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