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Failure to get DPI on VMs #545

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xcb-xwii opened this issue Sep 25, 2021 · 1 comment · Fixed by #547
Closed

Failure to get DPI on VMs #545

xcb-xwii opened this issue Sep 25, 2021 · 1 comment · Fixed by #547

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@xcb-xwii
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xcb-xwii commented Sep 25, 2021 •
edited

On virtual machines, scaling fails and displays a blank interface as follows:
image
For those facing the issue, run export LITE_SCALE=1 before starting lite-xl.

This is due to SDL being unable to get the device DPI on VMs. When the following code is ran:

#include <SDL2/SDL.h>
#include <stdio.h>

int main() {
        SDL_Init(SDL_INIT_VIDEO);

        float i, j, k;

        int err_code = SDL_GetDisplayDPI (0, &i, &j, &k);

        printf("%d: %s\n", err_code, SDL_GetError());
        printf("%f, %f, %f\n", i, j, k);
}

The output shown is:

-1: Couldn't get DPI
0.000000, 0.000000, 0.000000
@xcb-xwii
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image

@adamharrison adamharrison mentioned this issue Sep 25, 2021
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Rearranged DPI calc so that on calc failure, returns 1. adamharrison/lite-xl
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@xcb-xwii