Rotatable text

[hollandjake]

Feature Request

Enable text to be rotated

Feature description

Normally PDF text origin is the bottom-left of the text, however due to the coordinate system flip, it is now the top-left.

Questions:

Q: When rotating text where should the origin of rotation be?

• At point of usual render (top-left)

Q: Which direction should rotation be in (in PDF spec it states that rotation occurs anti-clockwise)

• anti-clockwise

Q: Do we reposition text so that it does not go above the origin (i.e. move the text down so the minY = text.options.y)

• No (we expose the transformation in the boundsOfString method which outputs the resultant x,y coords for the rendered text bounding box)

Q: Units of rotation
-Degrees

Once the questions are answered ill sort a PR out

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Example implementation i've done

• Blue dot is the text position
• Note it does work at any angle just using increments of 45 here for clarity
  

[hollandjake]

This could also bring in the code from boundsOfString with modification to support rotated text.