Re: [graphviz-interest] A question about the docs for cmapx

Hi Ron,


On Oct 20, 2016, at 4:51 PM, Ron Savage <[email protected]> wrote:

> I'm the author of the Perl wrapper GraphViz2 (https://metacpan.org/release/GraphViz2) around dot, and a user has requested support for image maps. He sent this url:
> 
> http://www.graphviz.org/doc/info/output.html#d:cmapx
> 
> I tried the code there but 'gif' was rejected. I found I could use 'svg' and 'png'.
> 
> I'm using dot V 2.38.0 under Debian V 8.6.
> 
> shell> aptitude search libgif
> p   libgif-dev     - library for GIF images (development)
> i A libgif4        - library for GIF images (library)
> p   libgiftiio-dev - IO library for the GIFTI cortical surface data format
> p   libgiftiio0    - IO library for the GIFTI cortical surface data format
> 
> shell> dot -T?
> Format: "?" not recognized. Use one of: canon cmap cmapx cmapx_np dot eps fig gv imap imap_np ismap pdf pic plain plain-ext png pov ps ps2 svg svgz tk vml vmlz x11 xdot xdot1.2 xdot1.4 xlib
> 
> So, is the problem:
> o My version of dot is out-of-date; or
> o My version of dot was installed in an environment without libgif; or
> o Are the docs are wrong.

I would say your dot was built without gd support.

https://www.libgd.org

Graphviz in MacPorts is built with gd support, and here's what we have:

$ dot -T?
Format: "?" not recognized. Use one of: bmp canon cgimage cmap cmapx cmapx_np dot dot_json eps exr fig gd gd2 gif gv icns ico imap imap_np ismap jp2 jpe jpeg jpg json json0 mp pct pdf pic pict plain plain-ext png pov ps ps2 psd sgi svg svgz tga tif tiff tk vml vmlz vrml wbmp webp x11 xdot xdot1.2 xdot1.4 xdot_json xlib

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