Viu image preview size

[ahloiscreamo]

Hello,
by default image preview using viu is small, is this the default behavior,

I opted to use viu because ueberzugp is problematic, it load fine but the image did not clear properly when switching workspace, and somehow wayland add unnecessary animation to ueberzug.

Chafa is buggy some image load, some not, kitty work but it uses heavy resources, all this problems because the so call 'modern design' of wayland bs.

[krotname]

This is expected with the current preview-tui + viu path.

In plugins/preview-tui, the pane size is passed explicitly only for some backends. For example kitty uses --place "$cols"x"$lines", and ueberzug gets width/height from the preview pane. But for a custom image command it just runs:

$NNN_PREVIEWIMGPROG "$file"

So if NNN_PREVIEWIMGPROG is viu or viu -n, then viu decides the display size itself. viu supports -w/--width and -h/--height; if you pass only one of them it preserves aspect ratio.

A simple workaround is to give viu an explicit size, for example:

export NNN_PREVIEWIMGPROG='viu -w 80'

or increase the preview split first:

export NNN_SPLITSIZE=60

NNN_PREVIEWWIDTH / NNN_PREVIEWHEIGHT are mainly for generated preview images/thumbnails, not for forcing how large viu draws in the pane.

If you want it to always use the current preview pane size, use a tiny wrapper script instead of calling viu directly, e.g. compute tput cols / tput lines inside the preview pane and call viu -w ... or viu -h .... Otherwise, a small patch to preview-tui could special-case viu the same way kitty/ueberzug are size-aware.

[ahloiscreamo]

I see,

export NNN_PREVIEWIMGPROG='viu -w 80' work like wonder, thanks!
however the landscape/horizontal image still small, i will need to work on the wrapper script then.

[jarun]

Thanks! Please share the patch you come up with!