[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Debugging Core Image Kernel

Subject: Re: Debugging Core Image Kernel
From: Pierre-Olivier Latour <email@hidden>
Date: Mon, 6 Jun 2005 16:46:50 -0700
Delivered-to: email@hidden
Delivered-to: email@hidden

I am working on a Core Image Kernel patch, and need to print out some values so I can track down why my math is not correct. Is there a way to do this?

You can do any kind of printf() from an image kernel as it runs on the GPU - the only thing you can output are pixels. I guess the best way to debug is to print pixels of different color depending on the result e.g. you can do things like:

float temp = ...
return (temp > 0.0 ? vec4(1,0,0,1) : vec4(0,1,0,1));

________________________________________________________
Pierre-Olivier Latour                            email@hidden
Quartz Composer Architect                Graphics & Imaging Team

_______________________________________________
Do not post admin requests to the list. They will be ignored.
Quartzcomposer-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quartzcomposer-dev/email@hidden

This email sent to email@hidden

References:
	>When should a CIImage be considered infinite? (From: Gabriele de Simone <email@hidden>)
	>Debugging Core Image Kernel (From: Paul Ossenbruggen <email@hidden>)

Prev by Date: New Q&As
Next by Date: Re: tutorials ?
Previous by thread: Debugging Core Image Kernel
Next by thread: Reducing the refresh rate of CPU Load input of the Host Info patch
Index(es):
- Date
- Thread

Home