[magick-users] GetFillColor and extract_info

[Anthony Thyssen]

omicronpersei8 at imagemagick.org on  wrote...
| > provide an offset to the Draw functions when used with the tile
| > option, which is exactly what I was hunting for. 
| 
| GetFillColor() is called by the object and text renderer.  If no fill
| pattern is available it uses the fill color otherwise it uses the fill
| pattern to paint the object or text with the pattern.  As you surmised
| extract_info.{xy} sets the initial pattern offset which defaults
| to 0,0.  You can set these fields when you read the pattern as in
| readImage('image.gif[+13+20]').  However, we probably should include a
| method in Magick++ to support this field but its possible we may want to
| use some other way to set the pattern offset since the extract_info field
| is already overloaded.  It would make the most sense to add a new member in
| the draw_info structure to specify the pattern offset.  Given that why
| not post a few lines of code of how you'd like to take advantage of a
| pattern offset and we'll figure out a way to define new members to the
| draw_info structure and a way to set the members in Magick++.

Hmm interesting...

A few tests...
   convert -size 60x60 tile:tile_weave.gif  x:
   convert -size 60x60 tile:tile_weave.gif'[+5+5]' x:

produces the same resulting image.

Same with...
   convert -size 60x60 xc: -tile tile_weave.gif \
            -draw 'color 0,0 reset' x:
   convert -size 60x60 xc: -tile tile_weave.gif'[+5+5]' \
            -draw 'color 0,0 reset' x:

I also tried quite a number of other ways including...

   convert tile_weave.gif +repage +5+5 png:- |\
     convert -size 60x60 xc: -tile - -draw 'circle 30,30 20,5' x: &

Setting a tile pattern in this way just does not seem effect the offset
of the pattern.

  Anthony Thyssen ( System Programmer )    <A.Thyssen at griffith.edu.au>
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