Re: [Open Babel] issue with cairo support / having problem drawing 2D molecules

[Geoffrey H. <geo...@gm...>]

You may have libcairo installed. The question is whether it was found when you compiled Open Babel or not.

"Manually" adding files isn't going to work - either libcairo was found when you ran "cmake" or not.

You can check with "ccmake ." and look for the CAIRO bits.

I'm not sure what you mean by "API" for SVG. Open Babel will output an SVG. There's no API.

-Geoff

> On Feb 1, 2017, at 12:27 PM, xh s <sx...@gm...> wrote:
> 
> But I have cairo installed: 
> 
> sxh% brew info cairo
> cairo: stable 1.14.8 (bottled), devel 1.15.2, HEAD
> Vector graphics library with cross-device output support
> https://cairographics.org/ <https://cairographics.org/>
> /usr/local/Cellar/cairo/1.14.8 (119 files, 5.9M)
>   Poured from bottle on 2017-01-27 at 11:59:37
> /usr/local/Cellar/cairo/1.15.2 (119 files, 5M) *
>   Built from source on 2017-01-31 at 17:23:30
> 
> Also, I think the functions that caused error are from cairopainter.cpp, which should be installed in the openbabel library but are missing now. The already installed libraries are dynamic and I don't know how to manually add these missing ones. I don't know what was wrong with my openbabel installation but I just don't seem to be able to get those depict.h related files and libraries installed. 
> 
> On another note, I don't mind using SVG. But I can't find the documentation about its API. 
> 
> Thanks, 
> Xianghai
> 
> On Wed, Feb 1, 2017 at 5:44 AM, Geoffrey Hutchison <geo...@gm... <mailto:geo...@gm...>> wrote:
> > from homebrew/macports and compiling manually), include/depict/ is not installed. If I copy this folder from the source code, I get some errors like this which I think means I'm missing the libraries.
> 
> 
> Mac OS X does not use cairo (a Linux drawing library). If you don't have it installed, it won't copy.
> 
> Personally, I suggest using SVG, which does not require external libraries.
> 
> But if you want to use libcairo (e.g for PNG support) you can make sure it's installed using homebrew:
> http://brewformulas.org/Cairo <http://brewformulas.org/Cairo>
> 
> Hope that helps,
> -Geoff
>