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Added compression option to save TIFF images #8531

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Added compression option to save TIFF images #8531

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073f1b9
Add LZW compression option to save TIFF images
Apr 24, 2017
14d0c30
Improved adhesion to code standards
Apr 24, 2017
ad850c2
Added TiffImagePlugin import required in print_tif
Apr 24, 2017
f4055ec
Fix typo that broke building process
Apr 24, 2017
1ed0ef9
Add comments and better spacing for TIFF LZW
Apr 24, 2017
fe523c4
Added "compression" as parameter that is passed to PIL backend
renato-umeton Apr 26, 2017
f3e730f
Fixed variable names and polished code a bit more
renato-umeton Apr 26, 2017
ca69a47
Removed unused import
renato-umeton Apr 26, 2017
bdb8066
Code polishing
renato-umeton Apr 26, 2017
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16 changes: 13 additions & 3 deletions lib/matplotlib/backends/backend_agg.py
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Original file line number Diff line number Diff line change
Expand Up @@ -625,14 +625,24 @@ def print_jpg(self, filename_or_obj, *args, **kwargs):

# add TIFF support
def print_tif(self, filename_or_obj, *args, **kwargs):
"""
Other Parameters
----------------
compression : 'tiff_deflate', 'tiff_adobe_deflate', 'tiff_lzw',
and other values allowed by LIBTIFF_CORE.
If present, indicates the compression algorithm that
will be passed to the backend to save the image.
"""
buf, size = self.print_to_buffer()
if kwargs.pop("dryrun", False):
return
image = Image.frombuffer('RGBA', size, buf, 'raw', 'RGBA', 0, 1)
dpi = (self.figure.dpi, self.figure.dpi)
return image.save(filename_or_obj, format='tiff',
dpi=dpi)
#add TIFF compression support by passing the parameter to backend
compression = kwargs.pop("compression", None)
return image.save(filename_or_obj, format='tiff', dpi=dpi,
compression=compression)

print_tiff = print_tif


FigureCanvas = FigureCanvasAgg