[mgp-users 01384] Re: Annotating transparent figures

[tbrown@nrri.umn.edu]

Assuming a unix like environment try adding to ~/.Xdefaults a line

  Ghostscript*background:    blue

then execute

  xrdb -merge ~/.Xdefaults

I haven't tried it, but it seems to me this or any other way you can
find of fixing the antialiasing problem would be the most complete
solution to your problem.  If you can easily regenerate your plots
with a blue background that would work too.

Cheers -Terry

On Tue, 25 Jan 2005, Marc Baaden wrote:

>   Hi,
>
> I encounter some problems trying to prepare figures for use with
> mgp. The figures are for example line graphs, where the background
> should be transparent, and where some of the lines need to be
> annotated with specific text. The transparency in itself is not a
> problem, but getting the text in a decent quality is.
>
> I tried several things:
>
>   * with gimp, adding the text is possible, but the final quality
>     is rather mediocre. In particular it heavily depends on the
>     resolution.
>
>   * using eps format with transparent background seems a bit better,
>     but the problem is it seems the eps are based on having a white
>     background, as with my dark (blue) background the antialiasing
>     is somewhat "the other way round" and thus wrong.
>
>   * using native text within mgp. Qualitatively this is the best and
>     absolutely nicest solution. The problem is placing the text at the
>     right positions (which in addition will change if you change the
>     positions of the figure on the slide) ! I currently use area, which
>     is quite a nightmare to get by trial and error and then properly
>     calculate the 4 values for positioning a single word.
>     Are there any other (better) ways ?
>
>     (what I was thinking of would be a tool that lets you query positions
>     on the slide - like with the "x" option, but indicating the location -
>     and ideally also create a code line to position you there)
>
>     Taking it one step further, the ideal thing would be an mgp command
>     to place text at specific positions relative to an image. These positions
>     should be easy to get from a given slide or the image itself. (Maybe
>     with an option to overlay a grid or something)
>
> Any additional hints or magic "procedures" would be very much appreciated.
>
> Thanks in advance,
>   Marc Baaden
>
> --
>  Dr. Marc Baaden  - Institut de Biologie Physico-Chimique, Paris
>  mailto:baaden@smplinux.de      -      http://www.marc-baaden.de
>  FAX: +33 15841 5026  -  Tel: +33 15841 5176  ou  +33 609 843217
>
>
>
>
>

-----------------------------------------------------------------------
Terry Brown               Natural Resources Research Institute
Research Associate        5013 Miller Trunk Highway
tbrown@nrri.umn.edu       University of Minnesota, Duluth
Ph. 218 720 4345          Duluth, Minnesota 55811
Fax 218 720 4328          http://beaver.nrri.umn.edu/~tbrown/