IRON-1233 Implement extract alpha data.

[mee-ironsoftware]

Description

Implement ExtractAlphaData() which will return array of alpha channel in byte. This function supported only image which in 32 bpp format.

Also add tag NuGet version to deployment pipeline when run successfully.

var bitmap = new AnyBitmap("32_bit_transparent.png");
byte[] result = bitmap.ExtractAlphaData();

Fixes #IRON-1233

Type of change

Please select the relevant option by placing an 'x' inside the brackets, like this: [x].

• [ ] 🐛 Bug fix (non-breaking change which fixes an issue)
• [X] ✨ New feature (non-breaking change which adds functionality)
• [ ] 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] 🏗️ Internal/structural update (non-breaking change that improves code quality, organization, or performance)
• [ ] 📚 This change requires a documentation update
• [ ] 🚀 DevOps build chain modification for release
• [ ] 🤖 DevOps build chain modification for CI

How Has This Been Tested?

Add 2 tests which are return correct result and throw exception.

Checklist:

Please run through the checklist as much as possible and mark the items completed by placing an 'x' inside the brackets, like this: [x].

• [ ] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [X] My changes generate no new warnings
• [X] I have added tests that prove my fix is effective or that my feature works
• [X] New and existing unit tests pass locally with my changes
• [X] I have successfully run all unit tests on Windows
• [X] I have successfully run all unit tests on Linux

[artem-iron]

Is alpha 0 means that the pixel is transparent? Maybe in the unit test, check also a couple of pixels that don't have 0?

[artem-iron]

Just to be safe.

[mee-ironsoftware]

Is alpha 0 means that the pixel is transparent? Maybe in the unit test, check also a couple of pixels that don't have 0?

@artem-iron Thanks, good point. 💪 I modified test to check various values from result.