feat: add wlr_scene_blur support and fix wlroots 0.20 API compatibility

- Implement blur effect using `wlr_scene_blur` for both clients and layer surfaces
- Add blur node creation and sizing in client/layer mapping and resize handlers
- Fix XWayland cursor initialization for wlroots 0.20 (use `wlr_xcursor_image_get_buffer`)
- Replace `wlr_scene_buffer` backdrop blur calls with `wlr_scene_blur_set_transparency_mask_source`

src/animation/client.h

@@ -995,6 +995,12 @@ void resize(Client *c, struct wlr_box geo, int32_t interact) {
 		c->fake_no_border = true;
 	}
 
+	if (config.blur && c->blur && !c->noblur) {
+		wlr_scene_blur_set_size(c->blur,
+			c->geom.width - 2 * c->bw,
+			c->geom.height - 2 * c->bw);
+	}
+
 	// c->geom 是真实的窗口大小和位置，跟过度的动画无关，用于计算布局
 	c->configure_serial = client_set_size(c, c->geom.width - 2 * c->bw,
 										  c->geom.height - 2 * c->bw);

src/animation/common.h

@@ -178,13 +178,6 @@ static bool scene_node_snapshot(struct wlr_scene_node *node, int32_t lx,
 		wlr_scene_buffer_set_corner_radii(snapshot_buffer,
 										  scene_buffer->corners);
 
-		// Blur functions removed in scenefx 0.5
-		// wlr_scene_buffer_set_backdrop_blur_optimized(
-		// 	snapshot_buffer, scene_buffer->backdrop_blur_optimized);
-		// wlr_scene_buffer_set_backdrop_blur_ignore_transparent(
-		// 	snapshot_buffer, scene_buffer->backdrop_blur_ignore_transparent);
-		// wlr_scene_buffer_set_backdrop_blur(snapshot_buffer, false);
-
 		snapshot_buffer->node.data = scene_buffer->node.data;
 
 		struct wlr_scene_surface *scene_surface =
@@ -221,6 +214,8 @@ static bool scene_node_snapshot(struct wlr_scene_node *node, int32_t lx,
 	}
 	case WLR_SCENE_NODE_OPTIMIZED_BLUR:
 		return true;
+	case WLR_SCENE_NODE_BLUR:
+		return true;
 	}
 
 	if (snapshot_node != NULL) {
@@ -259,4 +254,4 @@ void request_fresh_all_monitors(void) {
 		}
 		wlr_output_schedule_frame(m->wlr_output);
 	}
-}
+}

src/mango.c

@@ -92,6 +92,7 @@
 #include <wlr/xwayland.h>
 #include <xcb/xcb_icccm.h>
 #endif
+#include "common/xdg-shell-protocol.h"
 #include "common/util.h"
 
 /* macros */
@@ -315,6 +316,7 @@ struct Client {
 	struct wlr_scene_tree *scene;
 	struct wlr_scene_rect *border; /* top, bottom, left, right */
 	struct wlr_scene_shadow *shadow;
+	struct wlr_scene_blur *blur;
 	struct wlr_scene_tree *scene_surface;
 	struct wl_list link;
 	struct wl_list flink;
@@ -465,6 +467,7 @@ typedef struct {
 	struct wlr_scene_tree *scene;
 	struct wlr_scene_tree *popups;
 	struct wlr_scene_shadow *shadow;
+	struct wlr_scene_blur *blur;
 	struct wlr_scene_layer_surface_v1 *scene_layer;
 	struct wl_list link;
 	struct wl_list fadeout_link;
@@ -2393,20 +2396,21 @@ void closemon(Monitor *m) {
 
 static void iter_layer_scene_buffers(struct wlr_scene_buffer *buffer,
 									 int32_t sx, int32_t sy, void *user_data) {
+	LayerSurface *l = user_data;
+
 	struct wlr_scene_surface *scene_surface =
 		wlr_scene_surface_try_from_buffer(buffer);
 	if (!scene_surface) {
 		return;
 	}
 
-	// Blur functions removed in scenefx 0.5
-	// wlr_scene_buffer_set_backdrop_blur(buffer, true);
-	// wlr_scene_buffer_set_backdrop_blur_ignore_transparent(buffer, true);
-	// if (config.blur_optimized) {
-	// 	wlr_scene_buffer_set_backdrop_blur_optimized(buffer, true);
-	// } else {
-	// 	wlr_scene_buffer_set_backdrop_blur_optimized(buffer, false);
-	// }
+	struct wlr_surface *surface = scene_surface->surface;
+	if (wlr_subsurface_try_from_wlr_surface(surface) != NULL)
+		return;
+
+	if (config.blur && l && !l->noblur) {
+		wlr_scene_blur_set_transparency_mask_source(l->blur, buffer);
+	}
 }
 
 void layer_flush_blur_background(LayerSurface *l) {
@@ -2473,6 +2477,15 @@ void maplayersurfacenotify(struct wl_listener *listener, void *data) {
 		wlr_scene_node_set_enabled(&l->shadow->node, true);
 	}
 
+	if (config.blur && config.blur_layer &&
+		layer_surface->current.layer != ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM &&
+		layer_surface->current.layer != ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND) {
+		l->blur = wlr_scene_blur_create(l->scene, 0, 0);
+		wlr_scene_blur_set_should_only_blur_bottom_layer(l->blur,
+			config.blur_optimized);
+		wlr_scene_node_lower_to_bottom(&l->blur->node);
+	}
+
 	// 初始化动画
 	if (config.animations && config.layer_animations && !l->noanim) {
 		l->animation.duration = config.animation_duration_open;
@@ -2535,6 +2548,8 @@ void commitlayersurfacenotify(struct wl_listener *listener, void *data) {
 		l->animation.duration = config.animation_duration_move;
 		l->need_output_flush = true;
 		layer_set_pending_state(l);
+	} else {
+		l->geom = box;
 	}
 
 	if (config.blur && config.blur_layer) {
@@ -2544,6 +2559,9 @@ void commitlayersurfacenotify(struct wl_listener *listener, void *data) {
 			layer_surface->current.layer !=
 				ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND) {
 
+			if (l->blur) {
+				wlr_scene_blur_set_size(l->blur, l->geom.width, l->geom.height);
+			}
 			wlr_scene_node_for_each_buffer(&l->scene->node,
 										   iter_layer_scene_buffers, l);
 		}
@@ -4020,16 +4038,7 @@ static void iter_xdg_scene_buffers(struct wlr_scene_buffer *buffer, int32_t sx,
 		return;
 
 	if (config.blur && c && !c->noblur) {
-		// Blur functions removed in scenefx 0.5
-		// wlr_scene_buffer_set_backdrop_blur(buffer, true);
-		// wlr_scene_buffer_set_backdrop_blur_ignore_transparent(buffer, false);
-		// if (config.blur_optimized) {
-		// 	wlr_scene_buffer_set_backdrop_blur_optimized(buffer, true);
-		// } else {
-		// 	wlr_scene_buffer_set_backdrop_blur_optimized(buffer, false);
-		// }
-	} else {
-		// wlr_scene_buffer_set_backdrop_blur(buffer, false);
+		wlr_scene_blur_set_transparency_mask_source(c->blur, buffer);
 	}
 }
 
@@ -4133,6 +4142,13 @@ mapnotify(struct wl_listener *listener, void *data) {
 			: wlr_scene_subsurface_tree_create(c->scene, client_surface(c));
 	c->scene->node.data = c->scene_surface->node.data = c;
 
+	if (config.blur) {
+		c->blur = wlr_scene_blur_create(c->scene, 0, 0);
+		wlr_scene_blur_set_should_only_blur_bottom_layer(c->blur,
+			config.blur_optimized);
+		wlr_scene_node_lower_to_bottom(&c->blur->node);
+	}
+
 	client_get_geometry(c, &c->geom);
 
 	if (client_is_x11(c))
@@ -4222,6 +4238,9 @@ mapnotify(struct wl_listener *listener, void *data) {
 	}
 
 	// apply buffer effects of client
+	if (config.blur && c && !c->noblur && c->blur) {
+		wlr_scene_blur_set_size(c->blur, c->geom.width, c->geom.height);
+	}
 	wlr_scene_node_for_each_buffer(&c->scene_surface->node,
 								   iter_xdg_scene_buffers, c);
 
@@ -5599,6 +5618,7 @@ void setup(void) {
 	wlr_ext_image_copy_capture_manager_v1_create(dpy, 1);
 	wlr_ext_output_image_capture_source_manager_v1_create(dpy, 1);
 	wlr_data_control_manager_v1_create(dpy);
+	wlr_ext_data_control_manager_v1_create(dpy, 1);
 	wlr_data_device_manager_create(dpy);
 	wlr_primary_selection_v1_device_manager_create(dpy);
 	wlr_viewporter_create(dpy);
@@ -6026,6 +6046,10 @@ void unmaplayersurfacenotify(struct wl_listener *listener, void *data) {
 	layer_flush_blur_background(l);
 	wlr_scene_node_destroy(&l->shadow->node);
 	l->shadow = NULL;
+	if (l->blur) {
+		wlr_scene_node_destroy(&l->blur->node);
+		l->blur = NULL;
+	}
 	l->being_unmapped = false;
 }
 
@@ -6630,11 +6654,10 @@ void xwaylandready(struct wl_listener *listener, void *data) {
 	/* Set the default XWayland cursor to match the rest of dwl. */
 	/* XWayland cursor API changed in wlroots 0.20.0 - needs wlr_buffer instead
 	 * of raw pixels */
-	/* if ((xcursor = wlr_xcursor_manager_get_xcursor(cursor_mgr, "default",
-	   1))) wlr_xwayland_set_cursor( xwayland, xcursor->images[0]->buffer,
-	   xcursor->images[0]->width * 4, xcursor->images[0]->width,
-	   xcursor->images[0]->height, xcursor->images[0]->hotspot_x,
-	   xcursor->images[0]->hotspot_y); */
+	if ((xcursor = wlr_xcursor_manager_get_xcursor(cursor_mgr, "default", 1)))
+		wlr_xwayland_set_cursor(
+			xwayland, wlr_xcursor_image_get_buffer(xcursor->images[0]),
+			xcursor->images[0]->hotspot_x, xcursor->images[0]->hotspot_y);
 	/* xwayland can't auto sync the keymap, so we do it manually
 	  and we need to wait the xwayland completely inited
 	*/