Package: impressive
Version: 0.13.1-1
Followup-For: Bug #1047864
Checking the online documentation of Pillow (the fork of PIL that Debian ships),
the ANTIALIAS method has been renamed as LANCZOS:
https://pillow.readthedocs.io/en/stable/releasenotes/2.7.0.html
Antialias renamed to Lanczos
A new LANCZOS constant was added instead of ANTIALIAS.
When ANTIALIAS was initially added, it was the only high-quality filter
based on convolutions. It’s name was supposed to reflect this. Starting from
Pillow 2.7.0 all resize method are based on convolutions. All of them are
antialias from now on. And the real name of the ANTIALIAS filter is Lanczos
filter.
The ANTIALIAS constant is left for backward compatibility and is an alias
for LANCZOS.
This relates to a very old version (2.7.0 is from 2015)... I don't know the
actual details as to when and why this backward compatibility alias was dropped,
but it just is not provided anymore.
I prepared the patch I'm attaching to this mail and tested it (it works
correctly); I'm rebuilding and uploading a NMU for 7 days.
-- System Information:
Debian Release: trixie/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 6.1.0-1-amd64 (SMP w/8 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages impressive depends on:
ii mupdf-tools 1.22.2+ds1-1
ii poppler-utils 22.12.0-2+b1
ii python3 3.11.4-5+b1
ii python3-pil 10.0.0-1
ii python3-pygame 2.5.0-2
Versions of packages impressive recommends:
ii ffmpeg 7:6.0-5
ii mplayer 2:1.5+svn38423-2+b1
ii perl 5.36.0-7
ii xdg-utils 1.1.3-4.1
Versions of packages impressive suggests:
ii ghostscript 10.01.2~dfsg-1
pn latex-beamer <none>
pn pdftk <none>
-- no debconf information
diff --git a/impressive.py b/impressive.py
index 993dcee..9eb564c 100644
--- a/impressive.py
+++ b/impressive.py
@@ -2076,7 +2076,7 @@ class WipeClouds(Wipe):
img = ImageOps.equalize(ImageOps.autocontrast(img))
for i in range(self.blur):
img = img.filter(ImageFilter.BLUR)
- img = img.crop((border, border, img.size[0] - 2 * border, img.size[1]
- 2 * border)).resize((self.rx, self.ry), Image.ANTIALIAS)
+ img = img.crop((border, border, img.size[0] - 2 * border, img.size[1]
- 2 * border)).resize((self.rx, self.ry), Image.LANCZOS)
return img2str(img)
class WipeBrightness1(Wipe):
"""wipe based on the current slide's brightness"""
@@ -3505,16 +3505,16 @@ def RenderPDF(page, MayAdjustResolution, ZoomMode):
# downsample a supersampled image
if Supersample and not(ZoomMode):
img = img.resize((int(float(out[0]) / Supersample + 0.5),
- int(float(out[1]) / Supersample + 0.5)),
Image.ANTIALIAS)
+ int(float(out[1]) / Supersample + 0.5)),
Image.LANCZOS)
parscale = False # don't scale again
# perform PAR scaling (required for pdftoppm which doesn't support
different
# dpi for horizontal and vertical)
if parscale:
if PAR > 1.0:
- img = img.resize((int(img.size[0] / PAR + 0.5), img.size[1]),
Image.ANTIALIAS)
+ img = img.resize((int(img.size[0] / PAR + 0.5), img.size[1]),
Image.LANCZOS)
else:
- img = img.resize((img.size[0], int(img.size[1] * PAR + 0.5)),
Image.ANTIALIAS)
+ img = img.resize((img.size[0], int(img.size[1] * PAR + 0.5)),
Image.LANCZOS)
# crop the overscan (if present)
if Overscan:
@@ -3567,7 +3567,7 @@ def LoadImage(page, zoom=False, img=None):
if newsize > img.size:
filter = Image.BICUBIC
else:
- filter = Image.ANTIALIAS
+ filter = Image.LANCZOS
return img.resize(newsize, filter)
@@ -3703,7 +3703,7 @@ def PageImage(page, ZoomMode=False, RenderMode=False):
sy = OverviewCellY - 2 * OverviewBorder
if HighQualityOverview:
t0 = time.time()
- img.thumbnail((sx, sy), Image.ANTIALIAS)
+ img.thumbnail((sx, sy), Image.LANCZOS)
if (time.time() - t0) > 0.5:
print("Note: Your system seems to be quite slow;
falling back to a faster,", file=sys.stderr)
print(" but slightly lower-quality overview page
rendering mode", file=sys.stderr)
@@ -6409,7 +6409,7 @@ def main():
if (dummy.size[0] > maxsize[0]) or (dummy.size[1] > maxsize[1]):
size = ZoomToFit(dummy.size, maxsize, force_int=True)
if min(size) > 0:
- dummy.thumbnail(size, Image.ANTIALIAS)
+ dummy.thumbnail(size, Image.LANCZOS)
else:
dummy = None
if dummy:
