fix multiline text size calculcation

[michaelknoch]

Fixes https://app.asana.com/0/1190553484415965/1200141498205813

Type of change: bugfix

Motivation (current vs expected behavior)

There is a bug in the text rendering logic, where the frame of a UILabel does not match with the actual surface being rendered by SDL_TTF. This happens when the text renders very close to the right edge of the frame.

I revisited the code in TTF_RenderUTF8_Blended_Wrapped and found a minor difference there with what we have in the font renderer.

broken:

fixed

Please check if the PR fulfills these requirements

• [ ] Self-review: I am confident this is the simplest and clearest way to achieve the expected behaviour
• [ ] There are no dependencies on other PRs or I have linked dependencies through Zenhub
• [ ] The commit messages are clean and understandable
• [ ] Tests for the changes have been added (for bug fixes / features)

[codecov[bot]]

Codecov Report

Merging #330 (7d2736a) into master (c995949) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #330   +/-   ##
=======================================
  Coverage   51.25%   51.25%           
=======================================
  Files          87       87           
  Lines        2899     2899           
=======================================
  Hits         1486     1486           
  Misses       1413     1413           

Impacted Files	Coverage Δ
Sources/FontRenderer.swift	58.13% <100.00%> (ø)

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