Re: How can I create PDF with spot color?

fredo,

Thank you very much.



--- In [email protected], Alfred Reibenschuh 
<alfredreibenschuh@...> wrote:
>
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> AAA wrote:
> > Hi all,
> > 
> > I am confused. How can I create PDF with spot colors?
> > 
> > In API2 I only see the following sample code.
> > ------------------------------------------------------------------
---
> > 1    $cy = $pdf->colorspace_separation('Cyan',    '%f000');
> > 2    $ma = $pdf->colorspace_separation('Magenta', '%0f00');
> > 3    $ye = $pdf->colorspace_separation('Yellow',  '%00f0');
> > 4    $bk = $pdf->colorspace_separation('Black',   '%000f');
> > 5    $pms023 = $pdf->colorspace_separation('PANTONE 032CV', '%
0ff0');
> > 6    $dncs = $pdf->colorspace_devicen( [ 
$cy,$ma,$ye,$bk,$pms023 ] );
> > ------------------------------------------------------------------
---
> > 
> > My understanding is line 5 is make a separated colorspace 
> > for 'PANTONE 032CV', which is red ('%0ff0') in CMYK.
> > 
> > What to do next? I did $txt->fillcolor($pms023, 100); but didn't 
> > work. 
> > 
> > thanks a lot.
> 
> what you call "spot color" is a "separation colorspace" in pdf-
speech.
> 
> at first you must know the name of the spot-color your output-device
> supports eg "Orange" and an emulation value usually in CMYK eg "%
03f0".
> 
> looking at example "032_separation" we get:
> 
> my $csp=$pdf->colorspace_separation('Orange', '%03f0');
> 
> $gfx->fillcolor($csp, $tint);
> 
> 
> where $tint ranges from 0.0 to 1.0
> 
> 
> DeviceN colorspaces on the other side are usually for Images.
> 
> 
> (please note that both colorspaces are "linearly sampled",
> so $tint might need to be adjusted for gamma if you know what i 
mean)
> 
> 
> C
> 
> fredo
> - --
> Schonmal davon gehoert, dass nicht jeder linux user gleich ein
> programmierer ist, der alles, was er selber braucht, auch selber
> programmiert, installiert, patched, hacked oder portiert?
> 
> Urks?  Das ist doch nur eine Legende.....
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