[XeTeX] colour \specials not working with xdvipdfmx driver?

[caapv 208]

--- Paul Howson <paul-lists at tdgq.com.au> wrote:

> DISCOVERY 1
> 
> These dvipdfm specials (examples straight from the
> dvipdfm manual) do  
> not work:
> 
> \special{ pdf: bc [ 1 0 0 ] }
> \special{ pdf: ec }

Here is a patch:

Index: src/spc_util.c
===================================================================
--- src/spc_util.c      (リビジョン 94)
+++ src/spc_util.c      (作業コピー)
@@ -238,6 +238,7 @@
   else
     error = spc_read_color_pdf(spe, colorspec, ap);

+  skip_blank(&ap->curptr, ap->endptr);
   return  error;
 }



For a temporary workaround, use
\special{ pdf: bc [ 1 0 0 ]}
 
> DISCOVERY 2
> 
> As you say, \special{color rgb R G B} DOES work.
> HOWEVER, these  
> specials don't work:
> 
> \special{color push}
> \special{color pop}

The syntax is wrong.
\special{color push [color specification]}

> DISCOVERY 3
> 
> There is a very strange bug with \special{color rgb
> R G B}. On a long  
> document, using this command inside macros to switch
> colours, we kept  
> getting this error from xdvipdfmx:
> 
> 	  ** ERROR ** Only RGB/CMYK/Gray currently
> supported
[...]
> The only way to prevent it is to insert a color push
> before each  
> colour change, like this:
> 
> \special{color push}\special{color rgb R G B}
> 
> Then it works for the long document. Crazy.

It is no wonder if you don't push/pop colors, then
the color stack will eventually overflow.

> Paul Howson
> 
>
----------------------------------------------------------------
> Paul Howson
> The Design Group Qld, Warwick Qld Australia
> (www.tdgq.com.au)
> email: paul at tdgq.com.au    blog:
> www.tdgq.com.au/blog
> GRAPHIC DESIGN    WEB SITE DESIGN

Regards,
SMiyata

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