Re: a proper whiteout function

[Pierre Perol-Schneider]

Hi Kieren, Hi Carl,

I don't think that a standard scaling will help in this case.

Here's an illustration of what could happened :

\markup {
  \combine
  \with-color #magenta
  \scale #'(1.2 . 1.2)
  \musicglyph #"clefs.G"
  \musicglyph #"clefs.G"
}

Whatever glyph re-centering, you'll never get a proper whiteout.

One has to define a specific scaling function that can "blows" the glyph in order to get a bold one.

Cheers,

Pierre

2015-04-29 2:26 GMT+02:00 Kieren MacMillan <address@hidden>:

Hi Carl,

>> 1. follow exactly the grob/glyph outline (i.e., not just a rectangle/box,
>> as currently implemented);
>> 2. include a parameter to set the thickness of the outline; and
>> 3. include a parameter to determine whether the whiteout was filled
>> throughout, or allowed ³holes² inside (as per the grob/glyph outline).
>
> I think that doing all 3 things is virtually impossible, given my
> understanding of the current state of stencil handling.

Okay. Thanks for the information.

> I think that a stencil whiteout for simple stencils could be created by
> combining two stencils:
> 1) the original stencil
> 2) a scaled version of the original stencil, colored white, and placed on
> a lower layer
> The amount of scaling would determine the thickness of the outline.
> There would be no way of dealing properly with holes.

That might be sufficient for the vast majority of cases I’ve seen.
I’ll see if I can work out a quick Scheme function to accomplish what you’ve suggested here.

Thanks,
Kieren.
________________________________

Kieren MacMillan, composer
‣ website: www.kierenmacmillan.info
‣ email: address@hidden

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