Re: Look for Examples

On Sun, 18 Nov 2012, Manfred Rebentisch wrote:

> Hello,
> I just start to evaluate GraphicsMagick for my software projects.
> Until now I used own tools written around the gd-library.
>
> Now I looking for programming examples for the gm core C API, but I
> found nothing. I'm happy, if you can help and give me an URL for
> examples or projects, that make use of GraphicsMagick.

There is a very large body of programming examples for the gm core C 
API because gm itself uses the core C API for its implementation.  I 
suggest obtaining the source tarball and using its source code as a 
reference.  Some of the API is a bit clumsy due to its 20 year old 
history.  The source code for the test programs tests/rwblob.c and 
tests/rwfile.c should help with understanding use of the ImageInfo and 
Image structures.  There is also some example code on the 
GraphicsMagick Core C API web page at 
http://www.graphicsmagick.org/api/api.html which demonstrates a rather 
complex usage.

There is also a Wand API which is a simplified wrapper based on the gm 
core C CPI.  The Wand API seems to be popular due to being simplified 
and because there is an equivalent API in ImageMagick.  The TclMagick 
implementation uses the Wand API.

Feel free to ask questions regarding any issues you may encounter.

Bob
-- 
Bob Friesenhahn
[email protected], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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