Simplified detection of blur on workspace

include/sway/tree/workspace.h

@@ -92,9 +92,7 @@ struct sway_output *workspace_output_get_highest_available(
 
 void workspace_detect_urgent(struct sway_workspace *workspace);
 
-bool should_workspace_have_blur(struct sway_workspace *ws);
+bool workspace_get_blur_info(struct sway_workspace *ws,
-
-void workspace_get_blur_region(struct sway_workspace *ws,
 		pixman_region32_t *blur_region);
 
 void workspace_for_each_container(struct sway_workspace *ws,

sway/desktop/render.c

@@ -1791,8 +1791,13 @@ void output_render(struct sway_output *output, struct timespec *when,
 		render_unmanaged(output, damage, &root->xwayland_unmanaged);
 #endif
 	} else {
-		bool workspace_has_blur = should_workspace_have_blur(workspace);
+		// Gather the whole region where blur is drawn (all surfaces on
-		if (workspace_has_blur && config_should_parameters_blur()) {
+		// the focused workspace)
+		pixman_region32_t blur_region;
+		pixman_region32_init(&blur_region);
+		bool workspace_has_blur = workspace_get_blur_info(workspace, &blur_region);
+		// Expend the damage to compensate for blur
+		if (workspace_has_blur) {
 			// Skip all of the blur artifact prevention if we're damaging the
 			// whole viewport
 			if (renderer->blur_buffer_dirty) {
@@ -1818,15 +1823,8 @@ void output_render(struct sway_output *output, struct timespec *when,
 					wlr_region_expand(damage, damage, config_get_blur_size());
 				}
 
-				pixman_region32_t blur_region;
-				pixman_region32_init(&blur_region);
 				pixman_region32_t extended_damage;
 				pixman_region32_init(&extended_damage);
-
-				// Gather the whole region where blur is drawn (all surfaces on
-				// the focused workspace)
-				workspace_get_blur_region(workspace, &blur_region);
-
 				pixman_region32_intersect(&extended_damage, damage, &blur_region);
 				// Expand the region to compensate for blur artifacts
 				wlr_region_expand(&extended_damage, &extended_damage, config_get_blur_size());
@@ -1842,6 +1840,7 @@ void output_render(struct sway_output *output, struct timespec *when,
 				// Combine into the surface damage (we need to redraw the padding
 				// area as well)
 				pixman_region32_union(damage, damage, &extended_damage);
+				pixman_region32_fini(&extended_damage);
 
 				// Capture the padding pixels before blur for later use
 				fx_framebuffer_bind(&renderer->blur_saved_pixels_buffer);
@@ -1849,11 +1848,9 @@ void output_render(struct sway_output *output, struct timespec *when,
 				render_whole_output(renderer, wlr_output,
 						&renderer->blur_padding_region, &renderer->wlr_buffer.texture);
 				fx_framebuffer_bind(&renderer->wlr_buffer);
-
+			}
+		}
 		pixman_region32_fini(&blur_region);
-				pixman_region32_fini(&extended_damage);
-			}
-		}
 
 		float clear_color[] = {0.25f, 0.25f, 0.25f, 1.0f};
 
@@ -1870,7 +1867,7 @@ void output_render(struct sway_output *output, struct timespec *when,
 			&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM]);
 
 		// check if the background needs to be blurred
-		if (config_should_parameters_blur() && renderer->blur_buffer_dirty && workspace_has_blur) {
+		if (workspace_has_blur && renderer->blur_buffer_dirty) {
 			render_output_blur(output, damage);
 		}
 

sway/tree/workspace.c

@@ -692,39 +692,6 @@ void workspace_detect_urgent(struct sway_workspace *workspace) {
 	}
 }
 
-static bool find_blurred_con_iterator(struct sway_container *con, void *data) {
-	struct sway_view *view = con->view;
-	if (!view) {
-		return false;
-	}
-	return con->blur_enabled && !view->surface->opaque;
-}
-
-bool should_workspace_have_blur(struct sway_workspace *ws) {
-	if (!workspace_is_visible(ws)) {
-		return false;
-	}
-
-	if ((bool)workspace_find_container(ws, find_blurred_con_iterator, NULL)) {
-		return true;
-	}
-
-	// Check if any layer-shell surfaces will render effects
-	struct sway_output *sway_output = ws->output;
-	size_t len = sizeof(sway_output->layers) / sizeof(sway_output->layers[0]);
-	for (size_t i = 0; i < len; ++i) {
-		struct sway_layer_surface *lsurface;
-		wl_list_for_each(lsurface, &sway_output->layers[i], link) {
-			if (lsurface->has_blur && !lsurface->layer_surface->surface->opaque
-					&& lsurface->layer != ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND) {
-				return true;
-			}
-		}
-	}
-
-	return false;
-}
-
 struct blur_region_data {
 	struct sway_workspace *ws;
 	pixman_region32_t *blur_region;
@@ -748,9 +715,9 @@ static void find_blurred_region_iterator(struct sway_container *con, void *data)
 	}
 }
 
-void workspace_get_blur_region(struct sway_workspace *ws, pixman_region32_t *blur_region) {
+bool workspace_get_blur_info(struct sway_workspace *ws, pixman_region32_t *blur_region) {
-	if (!workspace_is_visible(ws)) {
+	if (!workspace_is_visible(ws) || !config_should_parameters_blur()) {
-		return;
+		return false;
 	}
 
 	// Each toplevel
@@ -771,6 +738,8 @@ void workspace_get_blur_region(struct sway_workspace *ws, pixman_region32_t *blu
 			}
 		}
 	}
+
+	return pixman_region32_not_empty(blur_region);
 }
 
 void workspace_for_each_container(struct sway_workspace *ws,