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macos: correctly handle retina cursors

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This change correctly sizes HiDPI curors on macOS.

Before this, the cursors would appear double the size of normal cursors
on non HiDPI screens.
Based in part on this comment:
https://gitlab.gnome.org/GNOME/gtk/-/issues/613#note_687914
This commit is contained in:
Lukas Oberhuber
2022-01-14 00:01:38 +00:00
parent 8252f99e08
commit 021cdf382d
1 changed files with 8 additions and 1 deletions
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9
gdk/quartz/gdkcursor-quartz.c
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@ -261,14 +261,21 @@ _gdk_quartz_display_get_cursor_for_surface (GdkDisplay *display,
NSCursor *nscursor;
GdkCursor *cursor;
GdkPixbuf *pixbuf;
double x_scale;
double y_scale;
GDK_QUARTZ_ALLOC_POOL;
pixbuf = gdk_pixbuf_get_from_surface (surface, 0, 0,
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface));
cairo_surface_get_device_scale (surface,
&x_scale,
&y_scale);
image = gdk_quartz_pixbuf_to_ns_image_libgtk_only (pixbuf);
nscursor = [[NSCursor alloc] initWithImage:image hotSpot:NSMakePoint(x, y)];
NSImageRep *rep = [[image representations] objectAtIndex:0];
[image setSize:NSMakeSize(rep.pixelsWide / x_scale, rep.pixelsHigh / y_scale)];
nscursor = [[NSCursor alloc] initWithImage:image hotSpot:NSMakePoint(x / x_scale, y / y_scale)];
cursor = gdk_quartz_cursor_new_from_nscursor (nscursor, GDK_CURSOR_IS_PIXMAP);