perf: single buffer for blur

Author: dy-tea

include/effects.h

@@ -55,6 +55,14 @@ typedef struct effects_output_t {
 	uint64_t mica_native[2];
 	bool mica_dirty;
 
+	// shared blurred background, reused by every window blur
+	struct wlr_buffer *blur_buf;
+	uint64_t blur_native[2];
+
+	// shared blurred layer background, reused by every layer surface blur
+	struct wlr_buffer *layer_blur_buf;
+	uint64_t layer_blur_native[2];
+
 	struct wlr_buffer *screen_shader_buf;
 	uint64_t screen_shader_native[2];
 	struct wlr_scene_buffer *screen_shader_node;

include/layer.h

@@ -18,10 +18,7 @@ typedef struct layer_surface_t {
 	bool mapped;
 
 	struct wlr_scene_buffer *blur_node;
-	struct wlr_buffer *blur_buf;
-	uint64_t blur_native[2];
-	bool blur_scene_hidden;
-	bool blur_geometry_dirty;
+	bool blur_scene_hidden, blur_region_dirty;
 	pixman_region32_t blur_region;
 
 	struct wl_listener new_popup;

include/surface.h

@@ -19,6 +19,8 @@ typedef struct surface_blur_t {
 	struct wlr_buffer *acrylic_buf;
 	uint64_t acrylic_native[2];
 	pixman_region32_t blur_region;
+	bool blur_region_dirty, blur_mask_valid;
+	struct be_corner_mask_params blur_mask_params;
 } surface_blur_t;
 
 typedef struct surface_rounded_t {