On 02/07/2011 09:03 AM, Martin Nordholts wrote:
> On 02/07/2011 01:33 PM, Patrick Horgan wrote:
>> On 02/06/2011 10:52 PM, Martin Nordholts wrote:
>>> On 02/07/2011 04:48 AM, Patrick Horgan wrote:
>>>> I'm trying to come up to speed on gegl and built the hello-world.c
>>>> example from the examples directory. The text from that example doesn't
>>>> show up on the output, although the mandelbrot zoom works wonderfully.
>>>> Is there anything I can do to figure it out? Can someone point me
>>>> toward something to read to understand where things are going on?
>>> One thing you can do is to run with the env var GEGL_DEBUG set to
>>> "process". That will give some output on how things are processed in the
>>> graph. Does the output for the text node look weird?
>>>
>>> / Martin
>>>
>>>
>> btw, forgot to say this is on Ubuntu using gegl and babl from git trunk
>> and gcc 4.6
>> Could it be where it says:
>> Using cache for pad 'output' on "gegl:text 0x9017e90"
> Yes maybe, caches don't always work like they should. If you disable
> that code, does it become better? You can also set a breakpoint in
> process() for text and see that the thread of execution looks reasonable
> when you single-step through the code.
I haven't figured it out, but have found that if I switch this:
gegl_node_link_many (mandelbrot, layer, display, NULL);
gegl_node_connect_to (text, "output", layer, "aux");
to
gegl_node_link_many (text, layer, display, NULL);
gegl_node_connect_to (mandelbrot, "output", layer, "aux");
g_printf("layer has aux pad: %d\n", gegl_node_has_pad(layer,"aux"));
I get the text, but not the mandelbrot, and the g_printf reports that
layer does have the aux pad (of course it would have printed something
on its own to tell me if the pad wasn't there).
Patrick
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