Reply 20 of 29, by BEEN_Nath_58
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ZellSF wrote on 2022-06-17, 12:39:1) Linedoubling itself doesn't need support on displays. As far as the display is concerned, it's just getting a higher resoluti […]
BEEN_Nath_58 wrote on 2022-06-17, 04:15:Can it mean linedoubling isn't supported on displays anymore or are they too afraid they'll lose users after they see an "Input out of range"
1) Linedoubling itself doesn't need support on displays. As far as the display is concerned, it's just getting a higher resolution image from the GPU. More compatibility problems ("Input of range") would be caused by the GPU outputting low resolutions without linedoubling.
2) Linedoubling lower resolutions have always been the standard. There's literally no reason to drop it.
There of course a possibility that a GPU sends the signal straight to the monitor (who knows what the internal logics are for which resolutions to linedouble), but the crux of the issue here is: you don't know and neither will most people submitting data to answer you. If you really want to know the lowest resolutions many modern displays support, you need a thorough testing methodology.
1) What are the alternatives to linedoubling? Problems such as "Input out of range" happens on my 17 inch monitor HD till date when trying to output 8K (yes I am aware of this) but even 1152x576(?). This is not even a low resolution. Does it mean GPU stops linedoubling at will?
2) Another question comes here, why is linedoubling so less frequent then. If I consider the "AMD upscaling" (they take any res < 480p and render at screen res) and "linedoubling" as 2 separate things, what modern DirectDraw wrappers follow is the former. Majority of them take a game at 320x200 (take Wing Commander 1 for example) and render at the screen resolution, but not do it as soon as a game uses 640x480.
"linedoubling" on the other hand as to what I understood still present that pixelated look. My 65 inch TV, which has scaling off, renders the same game in the center in a tiny box not visible 1m from the TV. AMD doesn't do it, neither does Intel Iris.
ZellSF wrote on 2022-06-17, 12:39:BEEN_Nath_58 wrote on 2022-06-17, 04:15:Supposing linedoubling still exists, still AMD render screens at native resolution for application resolution < 640x480. They could've used linedoubling, but they didn't!
Again, you do not know that. Without any measuring equipment, you have no idea what the GPU does internally with the signal before sending it to your screen.
It does a GPU upscale. Even NVIDA does it, but I can't ascertain in which certain cases it does.
ZellSF wrote on 2022-06-17, 12:39:BEEN_Nath_58 wrote on 2022-06-17, 04:15:(they don't support less than 640x480 as I said) ?
Aren't you claiming you're getting 100x100 output? And you're also claiming they don't support less than 640x480? That seems rather contradictory.
No contradictions here, the talk was of 2 different GPU vendors
previously known as Discrete_BOB_058