[haiku-bugs] [Haiku] #7481: Haiku does not support "touchscreen" - on Eee Slate. (Asus Eee ep121).
- From: "Bouncer" <trac@xxxxxxxxxxxx>
- Date: Fri, 29 Apr 2011 05:14:21 -0000
#7481: Haiku does not support "touchscreen" - on Eee Slate. (Asus Eee ep121).
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Reporter: Bouncer | Owner: mmlr
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Drivers/Mouse/USB | Version: R1/alpha2
Keywords: | Blocked By:
Blocking: | Has a Patch: 0
Platform: x86 |
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I am attempting to get Haiku running on Asus's new '''ep121''' computer.
It is a tablet device - with a touchscreen replacing the conventional
mouse.
Yes - Haiku does run on this machine. But as expected there are a number
of problems.
I am currently able to run Haiku on this machine by using external usb hid
devices.
'''FIRST PROBLEM :''' Haiku is not working correctly with the touchscreen
device.
The touchscreen device is an 'eGalax PCAP Multitouch' controller.
A usb hid device.
Haiku's usb hid driver recognizes it as a generic mouse.
Yes - Haiku does respond to a screen touch.
But only to position the cursor to the extreme bottom-right corner of the
screen.
So - the driver is working (sort of).
But haiku is getting some bad input.
I have added debugging statements to the usb_hid driver - and I can
clearly see the problem is one of absolute vs relative positioning
coordinates.
The device issues 'mouse movement' co-ordinates in the range of 0-32367
for both the X and Y axis.
Any touch, almost anywhere on the screen, will result in huge position
values. So large in fact that they move the mouse pointer to the far
bottom-right corner of the display.
I have also been able to verify that the positioning coordinates reported
are in fact proportional to the screen position which was touched.
I am thinking about developing a patch for this myself. It would certainly
be fun.
But the Input Server is pretty complicated. I would appreciate some advice
as to the best approach before I spend a lot of time on this.
Perhaps a 'touchscreen' driver - similar to the way 'touchpad' was set up
for the ps/2 drivers ?
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Ticket URL: <http://dev.haiku-os.org/ticket/7481>
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