Add Float64 Support

[weigert]

This PR adds float64 support for decoding .tiff files. This is in reference to issue #58.

The changes are relatively minor. This has been tested and works. I can't attach an example file here, but the data provided here is float64 Geodatenviewer der Stadt Wien.

Additionally, since I have been testing this locally, I used npm pack to make the module available locally to me. I added .tgz files to the .gitignore, but this change is not strictly necessary.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.51%. Comparing base (de5d521) to head (a1577d1).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #59      +/-   ##
==========================================
+ Coverage   79.89%   80.51%   +0.62%     
==========================================
  Files          12       12              
  Lines         562      580      +18     
  Branches      110      113       +3     
==========================================
+ Hits          449      467      +18     
  Misses        106      106              
  Partials        7        7              

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[targos]

Thanks! Why can't you attach an image ? Is it because of their size? We need at least one for the test cases.

[targos]

cgohlke/tifffile#73

Maybe we can use this library to generate a test image.

[weigert]

Sorry, github didn't allow uploading .TIFF files but simply zipping it solves this problem. Attached is a float64 .TIFF file I used for testing.
Vienna_21_Floridsdorf_15_3.zip

[targos]

Can you add one to the img folder and update the test to include it here?

https://github.com/erosiv/tiff/blob/2811a7bfbaf3a1334bc56f78b07d378c1da4b692/src/__tests__/decode.test.ts#L167-L175

[weigert]

The image and test have been added successfully.

[targos]

Perfect!