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Support imagemagick 7.1.0-48

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- the output of -metric PSNR changed
 - CMYK output can now be exactly compared

closes: #148
This commit is contained in:
Johannes Schauer Marin Rodrigues 2022-09-15 04:36:16 +02:00
parent 272fe0433f
commit 57d7e07e6b
Signed by untrusted user: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 31 additions and 8 deletions
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39
src/img2pdf_test.py
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@ -75,6 +75,7 @@ for prog in ["convert", "compare", "identify"]:
globals()[prog.upper()] = ["magick", prog] globals()[prog.upper()] = ["magick", prog]
HAVE_IMAGEMAGICK_MODERN = True HAVE_IMAGEMAGICK_MODERN = True
HAVE_EXACT_CMYK8 = True
try: try:
ver = subprocess.check_output(CONVERT + ["-version"], stderr=subprocess.STDOUT) ver = subprocess.check_output(CONVERT + ["-version"], stderr=subprocess.STDOUT)
m = re.fullmatch( m = re.fullmatch(
@ -82,13 +83,18 @@ try:
) )
if m is None: if m is None:
HAVE_IMAGEMAGICK_MODERN = False HAVE_IMAGEMAGICK_MODERN = False
HAVE_EXACT_CMYK8 = False
else: else:
if parse_version(m.group(1)) < parse_version("6.9.10-12"): if parse_version(m.group(1)) < parse_version("6.9.10-12"):
HAVE_IMAGEMAGICK_MODERN = False HAVE_IMAGEMAGICK_MODERN = False
if parse_version(m.group(1)) < parse_version("7.1.0-48"):
HAVE_EXACT_CMYK8 = False
except FileNotFoundError: except FileNotFoundError:
HAVE_IMAGEMAGICK_MODERN = False HAVE_IMAGEMAGICK_MODERN = False
HAVE_EXACT_CMYK8 = False
except subprocess.CalledProcessError: except subprocess.CalledProcessError:
HAVE_IMAGEMAGICK_MODERN = False HAVE_IMAGEMAGICK_MODERN = False
HAVE_EXACT_CMYK8 = False
if not HAVE_IMAGEMAGICK_MODERN: if not HAVE_IMAGEMAGICK_MODERN:
warnings.warn("imagemagick >= 6.9.10-12 not available, skipping certain checks...") warnings.warn("imagemagick >= 6.9.10-12 not available, skipping certain checks...")
@ -113,6 +119,12 @@ except subprocess.CalledProcessError:
if not HAVE_JP2: if not HAVE_JP2:
warnings.warn("imagemagick has no jpeg 2000 support, skipping certain checks...") warnings.warn("imagemagick has no jpeg 2000 support, skipping certain checks...")
# the result of compare -metric PSNR is either just a floating point value or a
# floating point value following by the same value multiplied by 0.01,
# surrounded in parenthesis since ImagemMagick 7.1.0-48:
# https://github.com/ImageMagick/ImageMagick/commit/751829cd4c911d7a42953a47c1f73068d9e7da2f
psnr_re = re.compile(rb"((?:inf|(?:0|[1-9][0-9]*)(?:\.[0-9]+)?))(?: \([0-9.]+\))?")
############################################################################### ###############################################################################
# HELPER FUNCTIONS # # HELPER FUNCTIONS #
############################################################################### ###############################################################################
@ -310,8 +322,8 @@ def write_png(data, path, bitdepth, colortype, palette=None, iccp=None):
def compare(im1, im2, exact, icc, cmyk): def compare(im1, im2, exact, icc, cmyk):
if exact: if exact:
if cmyk: if cmyk and not HAVE_EXACT_CMYK8:
raise Exception("cmyk cannot be exact") raise Exception("cmyk cannot be exact before ImageMagick 7.1.0-48")
elif icc: elif icc:
raise Exception("icc cannot be exact") raise Exception("icc cannot be exact")
else: else:
@ -345,7 +357,10 @@ def compare(im1, im2, exact, icc, cmyk):
stderr=subprocess.PIPE, stderr=subprocess.PIPE,
).stderr ).stderr
assert psnr != b"0" assert psnr != b"0"
psnr = float(psnr.strip(b"0")) assert psnr != b"0 (0)"
assert psnr_re.fullmatch(psnr) is not None, psnr
psnr = psnr_re.fullmatch(psnr).group(1)
psnr = float(psnr)
assert psnr != 0 # or otherwise we would use the exact variant assert psnr != 0 # or otherwise we would use the exact variant
assert psnr > 50 assert psnr > 50
@ -501,7 +516,9 @@ def compare_pdfimages_png(tmpdir, img, pdf, exact=True, icc=False):
stderr=subprocess.PIPE, stderr=subprocess.PIPE,
).stderr ).stderr
assert psnr != b"0" assert psnr != b"0"
psnr = float(psnr.strip(b"0")) assert psnr != b"0 (0)"
psnr = psnr_re.fullmatch(psnr).group(1)
psnr = float(psnr)
assert psnr != 0 # or otherwise we would use the exact variant assert psnr != 0 # or otherwise we would use the exact variant
assert psnr > 50 assert psnr > 50
(tmpdir / "images-000.png").unlink() (tmpdir / "images-000.png").unlink()
@ -5545,10 +5562,10 @@ def test_jpg_rot(tmp_path_factory, jpg_rot_img, jpg_rot_pdf):
def test_jpg_cmyk(tmp_path_factory, jpg_cmyk_img, jpg_cmyk_pdf): def test_jpg_cmyk(tmp_path_factory, jpg_cmyk_img, jpg_cmyk_pdf):
tmpdir = tmp_path_factory.mktemp("jpg_cmyk") tmpdir = tmp_path_factory.mktemp("jpg_cmyk")
compare_ghostscript( compare_ghostscript(
tmpdir, jpg_cmyk_img, jpg_cmyk_pdf, gsdevice="tiff32nc", exact=False tmpdir, jpg_cmyk_img, jpg_cmyk_pdf, gsdevice="tiff32nc", exact=HAVE_EXACT_CMYK8
) )
# not testing with poppler as it cannot write CMYK images # not testing with poppler as it cannot write CMYK images
compare_mupdf(tmpdir, jpg_cmyk_img, jpg_cmyk_pdf, exact=False, cmyk=True) compare_mupdf(tmpdir, jpg_cmyk_img, jpg_cmyk_pdf, exact=HAVE_EXACT_CMYK8, cmyk=True)
compare_pdfimages_cmyk(tmpdir, jpg_cmyk_img, jpg_cmyk_pdf) compare_pdfimages_cmyk(tmpdir, jpg_cmyk_img, jpg_cmyk_pdf)
@ -5902,10 +5919,16 @@ def test_tiff_float(tmp_path_factory, tiff_float_img, engine):
def test_tiff_cmyk8(tmp_path_factory, tiff_cmyk8_img, tiff_cmyk8_pdf): def test_tiff_cmyk8(tmp_path_factory, tiff_cmyk8_img, tiff_cmyk8_pdf):
tmpdir = tmp_path_factory.mktemp("tiff_cmyk8") tmpdir = tmp_path_factory.mktemp("tiff_cmyk8")
compare_ghostscript( compare_ghostscript(
tmpdir, tiff_cmyk8_img, tiff_cmyk8_pdf, gsdevice="tiff32nc", exact=False tmpdir,
tiff_cmyk8_img,
tiff_cmyk8_pdf,
gsdevice="tiff32nc",
exact=HAVE_EXACT_CMYK8,
) )
# not testing with poppler as it cannot write CMYK images # not testing with poppler as it cannot write CMYK images
compare_mupdf(tmpdir, tiff_cmyk8_img, tiff_cmyk8_pdf, exact=False, cmyk=True) compare_mupdf(
tmpdir, tiff_cmyk8_img, tiff_cmyk8_pdf, exact=HAVE_EXACT_CMYK8, cmyk=True
)
compare_pdfimages_tiff(tmpdir, tiff_cmyk8_img, tiff_cmyk8_pdf) compare_pdfimages_tiff(tmpdir, tiff_cmyk8_img, tiff_cmyk8_pdf)