Recent changes to bugs

#62 Optimization leads to PNG corruption

hgysin — Sat, 18 Oct 2025 13:58:50 -0000

This works fine with the current version (7.9.1)
does not create currupted output anymore.

$ optipng testcase.png
** Processing: testcase.png
2168x1472 pixels, 4x8 bits/pixel, RGB+alpha
Reducing image to 3x8 bits/pixel, RGB
Input IDAT size = 209550 bytes
Input file size = 213359 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0         IDAT size = 85874

Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0         IDAT size = 85874

Output IDAT size = 85874 bytes (123676 bytes decrease)
Output file size = 89527 bytes (123832 bytes = 58.04% decrease)

$ optipng --version
OptiPNG version 7.9.1
Copyright (C) 2001-2025 Cosmin Truta and the Contributing Authors.

This program is open-source software. See LICENSE for more details.

Portions of this software are based in part on the work of:
  Jean-loup Gailly and Mark Adler (zlib)
  Glenn Randers-Pehrson and the PNG Development Group (libpng)
  Miyasaka Masaru (BMP support)
  David Koblas (GIF support)

Using libpng version 1.6.50 and zlib version 1.3.1

#91 Test failure Assertion `num_trans == 1' failed.

Cosmin Truta — Tue, 10 Jun 2025 12:18:59 -0000

status: open --> closed-fixed

#90 Image corruption with invalid transparency

Cosmin Truta — Tue, 10 Jun 2025 12:15:54 -0000

status: open --> closed-fixed

[7.9.1] CMake build system installs optipng binary without executable permissions

Sebastian Pipping — Sat, 31 May 2025 18:33:12 -0000

Hello @cosmin, I'm in the process of packaging OptiPNG 7.9.1 for Gentoo and…

# ls -l /usr/bin/optipng
-rw-r--r-- 1 root root 97264 31. Mai 20:23 /usr/bin/optipng

…caught my attention in the process. The cause seems to be the way that the install command of CMake is currently used. Please let me know if you need help with a fix.

Thanks and best, Sebastian

#90 Image corruption with invalid transparency

Andrew — Sat, 24 May 2025 15:59:56 -0000

I have performed quick tests with latest build and seems fixed. Thanks!
Feel free to close the issue as FIXED.

#92 Does not build on macOS

Cosmin Truta — Fri, 23 May 2025 13:57:04 -0000

status: open --> closed-fixed
assigned_to: Cosmin Truta

#91 Test failure Assertion `num_trans == 1' failed.

Dan Fandrich — Wed, 21 May 2025 05:39:54 -0000

That solves the test problem! Thanks. Looking forward to the next version bump and seeing version 2025.2 soon☺

#90 Image corruption with invalid transparency

Cosmin Truta — Tue, 20 May 2025 22:21:18 -0000

OptiPNG version 7.9.1 is out. I hope this will turn out to be what version 0.7.9 should have been. Tomorrow I will continue with the Windows build.

A temporary Git repo is also up.

#91 Test failure Assertion `num_trans == 1' failed.

Cosmin Truta — Tue, 20 May 2025 22:18:42 -0000

See version 7.9.1. (Not a typo!)

#92 Does not build on macOS

Cosmin Truta — Tue, 20 May 2025 22:17:58 -0000

Thanks, Nico. Version 0.7.9 should have done the trick, but that one was an oopsie.
So I just uploaded version [sic] 7.9.1.