| Re: [platform-swt-dev] Correct Implementation for HiDPI |
Hi,
SWT scales automatically on Windows and Linux. Application won't have access to the screen coordinates. SWT does call a callback to the application for a new image when required (SWT supplies scale factor when it requests). If you use imageproviders(or imagedescriptor) you'll get sharper images otherwise the images and drawing gets scaled automatically will result in slightly blurred images.
Thanks and Regards,
Sravan
Sravan Kumar Lakkimsetti
IBM India Pvt Ltd,
Embassy Golf Links Business Park, D Block,
Off Indiranagar-Kormangla Inner Ring Road,
Bangalore - 560071, India
Phone: 91-80-41776858
-----Original Message-----
From: Thomas Singer [mailto:ts-swt@xxxxxxxxxxx]
Sent: Tuesday, May 15, 2018 2:28 PM
To: platform-swt-dev@xxxxxxxxxxx
Subject: Re: [platform-swt-dev] Correct Implementation for HiDPI
According to my understanding on macOS the zooming is handled transparently - for the application it looks like it does not have to perform any scaling itself, images are drawn scaled automatically by macOS and all paint operations are scaled automatically, too, with an unscaled coordinate-system. Is this right?
If using SWT as designed now, should SWT scale automatically, too, on Windows and Linux. Or is the application able to (and has to) access the full screen coordinates, thus painting each pixel even at 200% zoom?
--
Best regards,
Thomas Singer
=============
syntevo GmbH
https://www.syntevo.com
https://www.syntevo.com/blog
On 2018-05-03 16:50, Thomas Singer wrote:
> Hi all,
>
> For our application SmartGit (et al) we are using HiDPI support since
> it first was supported in SWT by adding workarounds where necessary.
> In the mean-time the SWT-API has changed significantly in this area
> and I only adapted our SWT use to get it working. Though I have the
> feeling we are not using it as designed according to the current API,
> especially on Linux the HiDPI detection does not work reliable for us.
>
> Is there a documentation how to implement image handling and paint
> operations correctly on HiDPI screens (we are just supporting 100% and
> 200% zoom level)? Thanks in advance.
>
> --
> Best regards,
> Thomas Singer
> =============
> syntevo GmbH
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