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add alpha channel support fo png files#614

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MartinThoma merged 2 commits intopy-pdf:masterfrom
mohamedali-zorgati1997:patch-1
Apr 6, 2022
Merged

add alpha channel support fo png files#614
MartinThoma merged 2 commits intopy-pdf:masterfrom
mohamedali-zorgati1997:patch-1

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@mohamedali-zorgati1997
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@MartinThoma MartinThoma added Tiny Pull requests that make a tiny change - and thus should be easy to merge workflow-images From a users perspective, image handling is the affected feature/workflow labels Apr 6, 2022
@MartinThoma
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Do you happen to have an example PDF which shows the difference? What does it mean that alpha channel is now supported?

@mohamedali-zorgati1997
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I just created this PDF file and it is a perfect example. Try to extract the image inside with and without the change I made and you will see the difference.
The alpha channel is the transparency mask in PNG files, so when extracting PNG images without the alpha channel, the transparent areas will show in black.

Comment thread Scripts/pdf-image-extractor.py Outdated
@MartinThoma MartinThoma merged commit 90d5539 into py-pdf:master Apr 6, 2022
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Nice! Thank you for your contribution!

There was a tiny typo which I fixed - besides that, it looks good!

@MartinThoma
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Thank you very much that you took the time to respond, although it took a year until you've got a reaction 🤗

@mohamedali-zorgati1997
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Always happy to be of service.

MartinThoma added a commit that referenced this pull request Apr 7, 2022
Features:

 - Add alpha channel support for png files in Script (#614)

Bug fixes (BUG):

 - Fix formatWarning for filename without slash (#612)
 - Add whitespace between words for extractText() (#569, #334)
 - "invalid escape sequence" SyntaxError (#522)
 - Avoid error when printing warning in pythonw (#486)
 - Stream operations can be List or Dict (#665)

Documentation (DOC):

 - Added Scripts/pdf-image-extractor.py
 - Documentation improvements (#550, #538, #324, #426, #394)

Tests and Test setup (TST):

 - Add Github Action which automatically run unit tests via pytest and
   static code analysis with Flake8 (#660)
 - Add several unit tests (#661, #663)
 - Add .coveragerc to create coverage reports

Developer Experience Improvements (DEV):

 - Pre commit: Developers can now `pre-commit install` to avoid tiny issues
               like trailing whitespaces

Miscallenious:

 - Add the LICENSE file to the distributed packages (#288)
 - Use setuptools instead of distutils (#599)
 - Improvements for the PyPI page (#644)
 - Python 3 changes (#504, #366)

You can see the full changelog at: 1.26.0...1.27.0
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2 participants