[Feature Request] Integer scaling/Fit to height toggle

[rz5]

This is about how the image is displayed in PCSX2.

Currently, the fit of the video is always set to "fit to height". This stretches the image while keeping the user-chosen aspect ratio.

This feature request is to have a checkbox on the GS Window options labelled, for example, "Integer scaling" where the final image size is NOT stretched e.g. if the frame size is 640x480, then display a centered 640x480 frame while leaving the rest black.

The reason for this feature request is to have a setting to display a pixel-perfect (i.e. unstretched) image, because stretching the image to a non-integer multiple resolution results in blurriness because we don't get a 1:1 pixel correspondence.

Back of the envelope implementation would be:

if (gs_window_options.integer_scaling == true) {
    /* Old behavior in case frame overflows from window */
    if (frame_size > gs_window.size) {
        fit_to_height();
    } else {
        present_as_is();
    }
}        

...

[gregory38]

 because stretching the image to a non-integer multiple resolution results in blurriness because we don't get a 1:1 pixel correspondence

Potentially the option linear present could help to avoid the blur

[rz5]

@gregory38 Using nearest-neighbor vs bilinear filtering would help combat the blur, yes. It doesn't fix the lack of 1:1 pixel ratio.

Also, while on that topic, I suggest refactoring occurrences of "Texture Filtering of Display" and "linear_present" to "Bilinear filtering". I had to trudge around the source code and in the GUI to understand what linear present meant.

[James-F2]

PCSX2 painfully lacks Integer-Scaling feature.

Another good way to scale the image is multiply the image by X times and only then stretch it.
This option is also not available in PCSX2.

[Boviligg]

Has there been any work or updates regarding this issue? It would really be worth it. Thanks.

[Muhlawor]

Can it be added?

[DukeSkinny]

Indeed, it looks like much of the work has been done already (#1918), but that's an old unfinished PR that seems wholly dropped.

I too would love the option to enable integer scaling, which would tremendously with running PCSX2 artifact-free to my VGA monitor. Currently, the way to do it is to lock the window size to the game's resolution & stretch the screen using the monitor buttons.

[refractionpcsx2]

Qt will have integer scaling (it already has)