On Fri, Nov 6, 2009 at 6:11 PM, Tim Chen wrote:

Today I pull babl / gegl clone from git, and build the source according to the document without error .

However, when I tried running the gegl-paint in the example folder, a blank window poped up. And whenever I click on the window, I got error message :

(lt-gegl-paint:2195): GLib-GObject-WARNING **: IA__g_object_new_valist: object class `GeglChantpath_c' has no property named `hardness'

How should I fix this problem?

The hardness property has been renamed stroke-hardness. Something else has broken elsewhere in GEGL at some point as well since fixing that still doesn't seem to cause any rendering to happen.

Also, is there any document with more detail about the core rendering algorithm of GEGL? I got the rough idea about GEGL using DAG as the core representation and DAG could improve the rendering efficiency by better operation cache and region masking. But I can't find any document with more details about how they are actually implemented.

The source code itself, including comments in the headers of the GeglNode and GeglOperation classes are the only proper reference of how this is currently implemented.

/Øyvind K.

On Wed, Nov 11, 2009 at 4:42 PM, Øyvind Kolås wrote:

On Fri, Nov 6, 2009 at 6:11 PM, Tim Chen wrote:

Today I pull babl / gegl clone from git

...

However, when I tried running the gegl-paint in the example folder, a blank window poped up. And whenever I click on the window, I got error message :

...

How should I fix this problem?

The hardness property has been renamed stroke-hardness. Something else has broken elsewhere in GEGL at some point as well since fixing that still doesn't seem to cause any rendering to happen.

Both problems have been resolved now, and the example works again.

/Øyvind K.