On 2017-01-20 23:54, Alan Braslau wrote:

On Fri, 20 Jan 2017 22:33:40 -0500 Rik Kabel wrote:

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Can anyone suggest a better way to compose such symbols than using the raw TeX commands used here? Is there a more ConTeXt-ish way to do this? Is it possible to get options to center the glyphs from which the symbol is assembled (separate horizontal and vertical, with the ability to offset them)?

Is there a ConTeXt way other than \definesymbol to create such combined symbols? MetaPost (with textext())?

Thank you for that, Alan. I hadn’t ever used MetaPost before, thinking it was too complex for my needs. Now I see it may be quite useful. So, how can I make the inner glyph (‘?’ in the example below) transparent, so that the background shows through along with anything else that lives on a lower layer? I’ve seen a method for constructed shapes, but nothing that I can apply to text glyphs. Undraw doesn’t do it. \setupbackgrounds [page] [background=color,backgroundcolor=yellow] \definefont [DVSrB] [file:DejaVuSerif-Bold.ttf] \startuseMPgraphic{HeartTest} picture h; h := "♥" infont "\truefontname{DejaVuSerif-Bold.ttf}" scaled 20; picture q; q := textext("{\DVSrB ?}") scaled 10; % just a different way q := q shifted - (xpart center q, 12pt) ; draw h withcolor blue; undraw q; % this doesn't do it \stopuseMPgraphic \starttext \useMPgraphic{HeartTest} \stoptext -- Rik

On Sun, 22 Jan 2017 22:39:53 -0500 Rik Kabel > wrote: > >> So, how can I make the inner glyph (‘?’ in the example below) >> transparent, so that the background shows through along with >> anything else that lives on a lower layer? I’ve seen a method for >> constructed shapes, but nothing

On 2017-01-23 00:06, Alan Braslau wrote: that I can apply to text glyphs. >> Undraw doesn’t do it. > > Undraw is simply draw using the background color. > > Transparency is a MetaFun extension to MetaPost (so part of > ConTeXt). > > draw q withtransparency (1,0.5) ; % (method,transparency) > > Alan Hmmm. That does not work for me (with any of many method and transparency values). The ‘?’ is solid black. I do see a message in the log that looks related: mkiv lua stats > page group warning: transparencies are used but no pagecolormodel is set but adding \setcolors[state=start,cmyk=yes] does not change that; both the warning and the solid black glyph remain. Could this be an issue of the PDF viewer? Is it a font issue? -- Rik

On 1/24/2017 4:04 AM, Rik wrote:

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On Sun, 22 Jan 2017 22:39:53 -0500 Rik Kabel > wrote: > >> So, how can I make the inner glyph (‘?’ in the example below) >> transparent, so that the background shows through along with >> anything else that lives on a lower layer? I’ve seen a method for >> constructed shapes, but nothing

On 2017-01-23 00:06, Alan Braslau wrote: that I can apply to text glyphs. >> Undraw doesn’t do it. > > Undraw is simply draw using the background color. > > Transparency is a MetaFun extension to MetaPost (so part of > ConTeXt). > > draw q withtransparency (1,0.5) ; % (method,transparency) > > Alan

Hmmm. That does not work for me (with any of many method and transparency values). The ‘?’ is solid black. I do see a message in the log that looks related:

mkiv lua stats > page group warning: transparencies are used but no pagecolormodel is set

but adding \setcolors[state=start,cmyk=yes] does not change that; both the warning and the solid black glyph remain. Could this be an issue of the PDF viewer? Is it a font issue? Okay, I got a clean compile using \definecolor and referencing that in

On 2017-01-23 14:09, Rik Kabel wrote: the MP page.

\setupbackgrounds [page] [background=color,backgroundcolor=yellow] \definecolor[Transp][r=1,t=0,a=12] \definefont [DVSrB] [file:DejaVuSerif-Bold.ttf] \startuseMPgraphic{HeartTest 1} picture h,q ; h := "♥" infont "\truefontname{DejaVuSerif-Bold.ttf}" scaled 20 ; q := textext("{\DVSrB ?}") scaled 10 ; q := q shifted - (xpart center q, 12pt) ; draw h withcolor blue ; draw q withtransparency(12,0) ; draw q shifted (72pt,0) withtransparency(12,0) ; \stopuseMPgraphic \startuseMPgraphic{HeartTest 2} picture h,q ; h := "♥" infont "\truefontname{DejaVuSerif-Bold.ttf}" scaled 20 ; q := textext("\color[Transp]{\DVSrB ?}") scaled 10 ; q := q shifted - (xpart center q, 12pt) ; draw h withcolor blue ; draw q ; draw q shifted (72pt,0) ; \stopuseMPgraphic \starttext \useMPgraphic{HeartTest 1} \useMPgraphic{HeartTest 2} \stoptext

Unfortunately, the result is not what I want. The result is that the “?” disappears, allowing the color directly behind it to show through. The example above shows that it works with \definecolor but not withwithtransparency. I have no idea why, and certainly realize it could be my error.

What I want is that the background of the page (yellow in this case) should show through. That is what is done with fill / reverse / cycle, as in:

\setupbackgrounds [page] [background=color,backgroundcolor=yellow] \startuseMPgraphic{CircleTest} path p,q ; p := fullcircle scaled 2cm ; q := fullcircle scaled 1cm ; fill p -- reverse q -- cycle withcolor blue; \stopuseMPgraphic \starttext \useMPgraphic{CircleTest} \stoptext

where the background color (yellow) comes through the inner circle (path q).

Can this be done with text characters? I suspect that the answer is that the glyphs have to be converted to paths and that it will only work when

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