Re: Snippet: Using arbitrary markup with LyricHyphen

[David F.]

On Mar 16, 2019, at 6:30 AM, Aaron Hill <address@hidden> wrote:

> This whole thing started as a way to automate setting the properties of 
> LyricHyphen based on the current LyricText font.  In my use case, I am 
> preparing music for projection, which requires larger font sizes than typical 
> for print.  The default values for things like length, thickness, and height 
> are not suitable and require manual tweaking.
> 
> What I wanted is a way to measure the size of an actual hyphen in a font and 
> have LyricHyphen's default stencil procedure draw a box accordingly.  
> However, when using ly:stencil-extent against a simple glyph, the results did 
> not reflect only the ink but also included spacing/kerning information for 
> the glyph.  Depending on the font, the effective width of a hyphen might be 
> larger than it actually appears.  The resulting LyricHyphen does not line up 
> with nor properly mimic a real hyphen.
> 
> Now, even if I could solve the detail with glyph outlines and get the right 
> dimensions, there is still a problem that Lyric_hyphen::print uses a rounded 
> box with a hard-coded corner radius for its stencil.  In my case, the radius 
> was too small compared to the actual hyphen in the font I was using, so it 
> looks too "sharp".
> 
> So, what I ended up doing was rewriting the LyricHyphen stencil procedure to 
> use an actual hyphen glyph rather than try to draw something.  And in the 
> noble pursuit of generalization, the following approach supports *any* 
> arbitrary markup.

I’ve been wanting this for quite a while.  Thanks for sharing!!

David