PngQaunt EPEL repository issue

Only affecting CentOS 7

The problem package can be found here pngquant-2.12.5-1.el7.x86_64.rpm.

On CentOS 7 using package pngquant-2.12.5-1.el7.x86_64 with the following command produces a 2-color image. It should be a 256-color image.

Command

pngquant --output pngquant-output.png --speed 1 --force -v -- pngquant-input.png

Output

pngquant-input.png:
  read 2019KB file
  used embedded ICC profile to transform image to sRGB colorspace
  made histogram...44630 colors found
  selecting colors...3%
  selecting colors...7%
  selecting colors...11%
  selecting colors...14%
  selecting colors...18%
  selecting colors...22%
  selecting colors...25%
  selecting colors...48%
  selecting colors...70%
  selecting colors...92%
  selecting colors...100%
  moving colormap towards local minimum
  eliminated opaque tRNS-chunk entries...0 entries transparent
  mapped image to new colors...MSE=553.309 (Q=0)
  writing 2-color image as pngquant-output.png
Quantized 1 image.

Image Input:

Image Output:

Expected Output

pngquant-input.png:
  read 2019KB file
  used embedded ICC profile to transform image to sRGB colorspace
  made histogram...44630 colors found
  selecting colors...3%
  selecting colors...7%
  selecting colors...11%
  selecting colors...33%
  selecting colors...37%
  selecting colors...59%
  selecting colors...81%
  selecting colors...100%
  moving colormap towards local minimum
  eliminated opaque tRNS-chunk entries...0 entries transparent
  mapped image to new colors...MSE=1.740 (Q=94)
  writing 256-color image as pngquant-output.png
  copied 2KB of additional PNG metadata
Quantized 1 image.

Setup

For any of the tests to work, you will need to build the local docker images, to build these run the relevant build script for your OS.

Linux

bash dockerfiles/build.sh

Windows

call dockerfiles/build.bat

Tests

These tests use docker containers to automate tests on different OS versions with the latest package installed via the default repo.

Change OS version accordingly.

Linux

bash tests/test-centos-version.sh {VERSION}

Windows

call tests/test-centos-version.bat {VERSION}

Example

Test all OS versions

Linux

bash tests/test-centos-version.sh 6
bash tests/test-centos-version.sh 7
bash tests/test-centos-version.sh 8

Windows

call tests/test-centos-version.bat 6
call tests/test-centos-version.bat 7
call tests/test-centos-version.bat 8

Input/Output Storage

The input pngquant-input.png and output pngquant-output.png images can be found in the tests/CentOS-{6-8}/data folder.

These are removed every time the test is run.

Custom Image

Currently, this pulls an image from GitHub.

You can change the code in scripts/test-pngquant.sh to use a different image.

Builds

These builds use docker containers to compile PngQuant to replicate the failed and successful build process.

Failed

The build that replicates the issue can be found at builds/failed.

Linux

bash builds/failed/test.sh

Windows

call builds/failed/test.bat

Successful

The build that fixes the issue can be found at build/successful.

Linux

bash builds/successful/test.sh

Windows

call builds/successful/test.bat

joejordanbrown / pngquant-epel-package-issue Goto Github PK

pngquant-epel-package-issue's Introduction

PngQaunt EPEL repository issue

Only affecting CentOS 7

Command

Output

Image Input:

Image Output:

Expected Output

Setup

Tests

Example

Input/Output Storage

Custom Image

Builds

Failed

Successful

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