Upgrade wlroots to v0.20

Breaking changes:
 - https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/5230

.github/workflows/main.yml

@@ -6,7 +6,7 @@ on:
     branches: [ master ]
 
 env:
-  WLROOTS_VERSION: 0.19
+  WLROOTS_VERSION: 0.20.0-rc3
 
 jobs:
   compile:

README.md

@@ -21,7 +21,7 @@ All releases are published on [GitHub](https://github.com/cage-kiosk/cage/releas
 
 You can build Cage with the [meson](https://mesonbuild.com/) build system. It
 requires wayland, wlroots, and xkbcommon to be installed. Optionally, install
-scdoc for manual pages. Cage is currently based on branch 0.18 of wlroots.
+scdoc for manual pages. Cage is currently based on branch 0.20 of wlroots.
 
 Simply execute the following steps to build Cage:
 

cage.c

@@ -588,8 +588,8 @@ main(int argc, char *argv[])
 		struct wlr_xcursor *xcursor = wlr_xcursor_manager_get_xcursor(xcursor_manager, DEFAULT_XCURSOR, 1);
 		if (xcursor) {
 			struct wlr_xcursor_image *image = xcursor->images[0];
-			wlr_xwayland_set_cursor(xwayland, image->buffer, image->width * 4, image->width, image->height,
-						image->hotspot_x, image->hotspot_y);
+			wlr_xwayland_set_cursor(xwayland, wlr_xcursor_image_get_buffer(image), image->hotspot_x,
+						image->hotspot_y);
 		}
 	}
 #endif

meson.build

@@ -35,7 +35,7 @@ if is_freebsd
   )
 endif
 
-wlroots        = dependency('wlroots-0.19', fallback: ['wlroots', 'wlroots'])
+wlroots        = dependency('wlroots-0.20', fallback: ['wlroots', 'wlroots'])
 wayland_protos = dependency('wayland-protocols', version: '>=1.14')
 wayland_server = dependency('wayland-server')
 xkbcommon      = dependency('xkbcommon')