[XeTeX] graphic special effects question

Wilfred van Rooijen wvanrooijen at yahoo.com
Sat Feb 13 07:14:28 CET 2010

Hi Alan,

Maybe the following does what you want?




  \filldraw[thick,white,fill opacity=0.5] (1.0, 1.0) rectangle (2.0,2.0) ;    


You create a TikZ picture, with a transparent rectangle in the main layer, and you add a special background layer underneath the main layer to contain the photo.

Let us know if this is what you wanted!


--- On Sat, 13/2/10, Alan Hoenig <ezchinesey at gmail.com> wrote:

> From: Alan Hoenig <ezchinesey at gmail.com>
> Subject: [XeTeX] graphic special effects question
> To: xetex at tug.org
> Date: Saturday, 13 February, 2010, 4:28 AM
> I hope to be able to produce the following
> graphic effect from within XeTeX.  If I include a photo
> (say) within a TeX document, I'd like to be able to
> superpose a smaller square 'filter' over a portion
> of it so that the original pic shows through, but appears
> lighter (or perhaps darker).  That is, all the features of
> the original are present and visible but filtered by the
> overlay to appear darker or lighter than the surrounding
> portion of the photo.  How can I do this?  If there is no
> XeTeX solution, what is the best way to proceed.  Thanks
> for any info!
> ---Alan Hoenig
> -----Inline Attachment Follows-----
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