From eric.marsden at free.fr  Mon Apr  5 12:13:51 2010
From: eric.marsden at free.fr (Eric Marsden)
Date: Mon, 05 Apr 2010 14:13:51 +0200
Subject: [cl-pdf-devel] PATCH: PDF transparency support
Message-ID: <87ljd29jwg.fsf@free.fr>

Hi,

The attached patch adds support for PDF transparency, using the existing
gstate mechanism. It allows you to specify transparency for stroke and
fill operations seperately. The "blend mode" can also be specified. The
patch includes an example.

Note that viewer support for different blend modes is variable (works OK
in Adobe Reader, Foxit Reader, xpdf but not in evince/poppler). 

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-- 
Eric Marsden

From pinterface at gmail.com  Mon Apr 19 04:53:24 2010
From: pinterface at gmail.com (Pixel // pinterface)
Date: Sun, 18 Apr 2010 22:53:24 -0600
Subject: [cl-pdf-devel] Better arglists for pdf:with-document, tt:paragraph,
	etc.
Message-ID: <hqgnpd$6p3$1@dough.gmane.org>

Do you find it difficult to use cl-pdf or cl-typesetting with limited &rest
lambda lists?  Do the autodoc hints in slime prove unhelpful?  Do you wish
you could type "(with-document " or "(paragraph " and get an accurate
listing of what arguments are available?  Do you use SBCL or Clisp?[1]

Then have I got the .asd for you!

Introducing cl-pdf.arglists: better arglists for cl-pdf and cl-typesetting
macros.
  http://web.kepibu.org/code/lisp/cl-pdf.arglists/

Turns
  (with-document (&rest args
                  &key (max-number-of-pages 'pdf:*max-number-of-pages*)
                  &allow-other-keys)
                 &body body)
into
  (with-document (&rest args
                  &key (max-number-of-pages 'pdf:*max-number-of-pages*)
                  empty mode layout (creator "") author title subject
                  keywords &allow-other-keys)
                 &body body)
and
 (paragraph (&rest style) &body body)
into
 (paragraph (&rest style
             &key font font-size text-x-scale color
             background-color h-align left-margin right-margin
             pre-decoration post-decoration leading-ratio)
            &body body)

Wow!

But wait, there's more!

Act now, and we'll include at no additional cost:
* Keyword arguments from object initargs
* Keyword arguments from initialize-instance
* To-the-macroexpansion accuracy through the magic of introspection

That's an arbitrary-dollar-amount value for only $0!  That's a savings of
<division-by-zero>%!


[1] Patches for other implementations welcome!

-pix
If only I'd written this /before/ largely finishing my cl-pdf-using program.
:)






From marc.battyani at fractalconcept.com  Tue Apr 20 13:37:04 2010
From: marc.battyani at fractalconcept.com (Marc Battyani)
Date: Tue, 20 Apr 2010 09:37:04 -0400
Subject: [cl-pdf-devel] PATCH: PDF transparency support
In-Reply-To: <87ljd29jwg.fsf@free.fr>
References: <87ljd29jwg.fsf@free.fr>
Message-ID: <4BCDAE00.6020005@fractalconcept.com>

Thanks Eric! :)

I will look at that and put it in the repository.

Marc

On 05-04-10 8:13 AM, Eric Marsden wrote:
> Hi,
>
> The attached patch adds support for PDF transparency, using the existing
> gstate mechanism. It allows you to specify transparency for stroke and
> fill operations seperately. The "blend mode" can also be specified. The
> patch includes an example.
>
> Note that viewer support for different blend modes is variable (works OK
> in Adobe Reader, Foxit Reader, xpdf but not in evince/poppler). 
>
>   
>
>
>
>   
>
>
> _______________________________________________
> cl-pdf-devel site list
> cl-pdf-devel at common-lisp.net
> http://common-lisp.net/mailman/listinfo/cl-pdf-devel
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From marc.battyani at fractalconcept.com  Tue Apr 20 15:10:19 2010
From: marc.battyani at fractalconcept.com (Marc Battyani)
Date: Tue, 20 Apr 2010 11:10:19 -0400
Subject: [cl-pdf-devel] Better arglists for pdf:with-document,
 tt:paragraph, etc.
In-Reply-To: <hqgnpd$6p3$1@dough.gmane.org>
References: <hqgnpd$6p3$1@dough.gmane.org>
Message-ID: <4BCDC3DB.2080306@fractalconcept.com>

On 19-04-10 12:53 AM, Pixel // pinterface wrote:
> Do you find it difficult to use cl-pdf or cl-typesetting with limited &rest
> lambda lists?  Do the autodoc hints in slime prove unhelpful?  Do you wish
> you could type "(with-document " or "(paragraph " and get an accurate
> listing of what arguments are available?  Do you use SBCL or Clisp?[1]
>
> Then have I got the .asd for you!
>
> Introducing cl-pdf.arglists: better arglists for cl-pdf and cl-typesetting
> macros.
>   http://web.kepibu.org/code/lisp/cl-pdf.arglists/
>
> Turns
>   (with-document (&rest args
>                   &key (max-number-of-pages 'pdf:*max-number-of-pages*)
>                   &allow-other-keys)
>                  &body body)
> into
>   (with-document (&rest args
>                   &key (max-number-of-pages 'pdf:*max-number-of-pages*)
>                   empty mode layout (creator "") author title subject
>                   keywords &allow-other-keys)
>                  &body body)
> and
>  (paragraph (&rest style) &body body)
> into
>  (paragraph (&rest style
>              &key font font-size text-x-scale color
>              background-color h-align left-margin right-margin
>              pre-decoration post-decoration leading-ratio)
>             &body body)
>
> Wow!
>
> But wait, there's more!
>
> Act now, and we'll include at no additional cost:
> * Keyword arguments from object initargs
> * Keyword arguments from initialize-instance
> * To-the-macroexpansion accuracy through the magic of introspection
>
> That's an arbitrary-dollar-amount value for only $0!  That's a savings of
> <division-by-zero>%!
>
>
> [1] Patches for other implementations welcome!
>   

Nice. :)

For LispWorks you can use lw:function-lambda-list to get the arglist:
(lw:function-lambda-list 'with-document)
((&rest args &key (max-number-of-pages (quote *max-number-of-pages*))
&allow-other-keys) &body body)

I don't know how to set it though.

Marc