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Merge pull request #6518 from radarhere/pdf_ccittfaxdecode

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Hugo van Kemenade 2022-08-31 13:55:46 +03:00 committed by GitHub
commit b953f73548
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2 changed files with 20 additions and 17 deletions
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4
Tests/test_file_pdf.py
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@ -6,7 +6,7 @@ import time
import pytest
from PIL import Image, PdfParser
from PIL import Image, PdfParser, features
from .helper import hopper, mark_if_feature_version
@ -44,7 +44,7 @@ def test_monochrome(tmp_path):
# Act / Assert
outfile = helper_save_as_pdf(tmp_path, mode)
assert os.path.getsize(outfile) < 5000
assert os.path.getsize(outfile) < (5000 if features.check("libtiff") else 15000)
def test_greyscale(tmp_path):

33
src/PIL/PdfImagePlugin.py
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@ -25,7 +25,7 @@ import math
import os
import time
from . import Image, ImageFile, ImageSequence, PdfParser, __version__
from . import Image, ImageFile, ImageSequence, PdfParser, __version__, features
#
# --------------------------------------------------------------------
@ -130,20 +130,23 @@ def _save(im, fp, filename, save_all=False):
width, height = im.size
if im.mode == "1":
filter = "CCITTFaxDecode"
bits = 1
params = PdfParser.PdfArray(
[
PdfParser.PdfDict(
{
"K": -1,
"BlackIs1": True,
"Columns": width,
"Rows": height,
}
)
]
)
if features.check("libtiff"):
filter = "CCITTFaxDecode"
bits = 1
params = PdfParser.PdfArray(
[
PdfParser.PdfDict(
{
"K": -1,
"BlackIs1": True,
"Columns": width,
"Rows": height,
}
)
]
)
else:
filter = "DCTDecode"
colorspace = PdfParser.PdfName("DeviceGray")
procset = "ImageB" # grayscale
elif im.mode == "L":