windows 10 weird scaling method

[emosun]

I noticed that windows 10 doesn't actually change resolutions , it just renders the resolution internally and rescales the output to simulate what that resolution should look like but still outputs only a single resolution signal to the monitor.

 

An example would be if I say set a super low res like 800x600 , the gpu will never cut the signal. It will simply stay at the monitors native res , scale everything down to 800x600 internally , then stretch the 800x600 image across the monitors native resolution.

 

Why would they do it like this?

 

As a result , when running any desktop res other than native the actual "scaling" option in windows will be incorrect in terms of the % slider

[Zando_]

Sorta: 

According to this,  W10 uses Bitmap scaling which results in UI being blurry even with AA. 

MS has their own blog posts on how W10 scaling works as well (they go over the reasons why it's set up this way too):

https://docs.microsoft.com/en-us/archive/blogs/askcore/display-scaling-in-windows-10
 

https://docs.microsoft.com/en-us/archive/blogs/askcore/display-scaling-changes-for-the-windows-10-anniversary-update

 

This is all from a while back (2015-2018), but I don't think much has changed as far as Windows is concerned. 

 

[emosun]

6 hours ago, Zando_ said:

Sorta: 

According to this,  W10 uses Bitmap scaling which results in UI being blurry even with AA. 

MS has their own blog posts on how W10 scaling works as well (they go over the reasons why it's set up this way too):

https://docs.microsoft.com/en-us/archive/blogs/askcore/display-scaling-in-windows-10
 

https://docs.microsoft.com/en-us/archive/blogs/askcore/display-scaling-changes-for-the-windows-10-anniversary-update

 

This is all from a while back (2015-2018), but I don't think much has changed as far as Windows is concerned. 

 

those both seem to address scaling but not resolution

[GoodBytes]

17 hours ago, emosun said:

I noticed that windows 10 doesn't actually change resolutions , it just renders the resolution internally and rescales the output to simulate what that resolution should look like but still outputs only a single resolution signal to the monitor.

 

An example would be if I say set a super low res like 800x600 , the gpu will never cut the signal. It will simply stay at the monitors native res , scale everything down to 800x600 internally , then stretch the 800x600 image across the monitors native resolution.

 

Why would they do it like this?

 

As a result , when running any desktop res other than native the actual "scaling" option in windows will be incorrect in terms of the % slider

So 2 things.

• You need to tell the GPU driver to not to scale the screen resolution to match the one of the monitor. I don't know where the option is on AMD, but on Nvidia side: Nvidia Control Panel > Display (side nav) > Adjust size and position. And pick "No Scale"
• You also need a monitor that support 1:1 pixel mapping. Sometimes it is an option, can be called "Mapping", "Scaling" or "Wide Mode" or something along those lines. Sometimes the monitor won't have the option and just do it. Others, don't have the option, and scale regardless of anything. Some monitor only has 1:1 pixel mapping on some video input connectors but not all.