From mboxrd@z Thu Jan 1 00:00:00 1970 From: Henrik Rydberg Subject: Re: [PATCH] input: mt: Add an envelope tool type Date: Thu, 09 Dec 2010 02:24:53 +0100 Message-ID: <4D002FE5.2070609@euromail.se> References: <1291721340-22652-1-git-send-email-rydberg@euromail.se> <4CFFC3C2.1080905@canonical.com> <20101208235805.GE15294@core.coreip.homeip.net> <4D002CE8.2060803@euromail.se> <20101209011752.GH15294@core.coreip.homeip.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from ch-smtp02.sth.basefarm.net ([80.76.149.213]:33106 "EHLO ch-smtp02.sth.basefarm.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750928Ab0LIB00 (ORCPT ); Wed, 8 Dec 2010 20:26:26 -0500 In-Reply-To: <20101209011752.GH15294@core.coreip.homeip.net> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Dmitry Torokhov Cc: Ping Cheng , Chase Douglas , Jiri Kosina , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org On 12/09/2010 02:17 AM, Dmitry Torokhov wrote: > On Thu, Dec 09, 2010 at 02:12:08AM +0100, Henrik Rydberg wrote: >>>>> >> >>>>> Is it assumed that the envelop has only two touches comprising it? Or is >>>>> it any number of touches? If it's any number of touches, how does one >>>>> know how many touches it is? >>>> >>>> Those are good questions. Specifying how many touches are in the >>>> envelop makes sense. It also covers rectangle as a special case of >>>> envelop. >>> >>> I have a feeling that trying to accomodate non-rectangular, more than 2 >>> point shapes without using native MT data is over-engineering the >>> problem... Do we have examples other than older generation Elantechs and >>> Synaptics that need envelope notion? >>> >> >> >> Those are the ones targeted so far. Maybe appletouch could be added to the list >> as well. I imagine all drivers will end up using zero, one and two envelope points. > > Even ones that fully support independent finger tracking? > No, sorry, that should read "all drivers in that list". The ones that can detect individual fingers in space are fine as they are.