Re: [PATCH] ui/cocoa: Do not automatically zoom for HiDPI

[Peter Maydell]

On Mon, 18 Mar 2024 at 09:02, Akihiko Odaki <akihiko.odaki@daynix.com> wrote:
>
> Cocoa automatically zooms for a HiDPI display like Retina and makes
> the display blurry. Revert the automatic zooming.
>
> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
> ---
>  ui/cocoa.m | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/ui/cocoa.m b/ui/cocoa.m
> index fa879d7dcd4b..c5b3c28000ff 100644
> --- a/ui/cocoa.m
> +++ b/ui/cocoa.m
> @@ -522,7 +522,10 @@ - (void) resizeWindow
>      [[self window] setContentAspectRatio:NSMakeSize(screen.width, 
> screen.height)];
>
>      if (!([[self window] styleMask] & NSWindowStyleMaskResizable)) {
> -        [[self window] setContentSize:NSMakeSize(screen.width, 
> screen.height)];
> +        CGFloat width = screen.width / [[self window] backingScaleFactor];
> +        CGFloat height = screen.height / [[self window] backingScaleFactor];
> +
> +        [[self window] setContentSize:NSMakeSize(width, height)];
>          [[self window] center];
>      } else if ([[self window] styleMask] & NSWindowStyleMaskFullScreen) {
>          [[self window] setContentSize:[self screenSafeAreaSize]];
> @@ -575,8 +578,8 @@ - (void) updateUIInfoLocked
>
>      info.xoff = 0;
>      info.yoff = 0;
> -    info.width = frameSize.width;
> -    info.height = frameSize.height;
> +    info.width = frameSize.width * [[self window] backingScaleFactor];
> +    info.height = frameSize.height * [[self window] backingScaleFactor];
>
>      dpy_set_ui_info(dcl.con, &info, TRUE);
>  }

Could we / should we use convertRectToBacking and convertRectFromBacking
rather than doing the multiply/divide ourselves? The docs seem to
recommend against directly using backingScaleFactor when possible.

thanks
-- PMM