reuse pango layouts for text nodes

src/text-node.c

@@ -30,14 +30,17 @@ int text_node_handle(UINode *node, enum UIEvent ev, size_t d, void *p)
 
     if (n->pending_text) {
         if (n->layout) {
-            g_object_unref(n->layout);
+            pango_layout_set_text(n->layout, n->pending_text, -1);
+            pango_cairo_update_layout(node->drw, n->layout);
+            n->pending_text = NULL;
+        } else {
+            PangoLayout *layout = pango_cairo_create_layout(n->node.drw);
+            pango_layout_set_font_description(layout, n->desc);
+            pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
+            pango_layout_set_text(layout, n->pending_text, -1);
+            n->layout = layout;
+            n->pending_text = NULL;
         }
-        PangoLayout *layout = pango_cairo_create_layout(n->node.drw);
-        pango_layout_set_font_description(layout, n->desc);
-        pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
-        pango_layout_set_text(layout, n->pending_text, -1);
-        n->layout = layout;
-        n->pending_text = NULL;
     }
 
     switch (ev) {

src/window.c

@@ -1,8 +1,9 @@
 #include "cairo.h"
+#include "rect.h"
 #include "timeutil.h"
 #include "window.h"
 #include "node.h"
-//#define PROF
+#define PROF
 #include "prof.c"
 #include "time.h"
 #include <stdint.h>
@@ -10,6 +11,7 @@
 #include <sys/poll.h>
 #include <time.h>
 #include <xcb/xcb.h>
+#include <xcb/xproto.h>
 
 void _window_process_xcb_event(UIWindow *window, xcb_generic_event_t *event);
 
@@ -168,11 +170,17 @@ void _window_process_xcb_event(UIWindow *window, xcb_generic_event_t *event)
     uint8_t event_type = event->response_type & ~0x80;
     switch (event_type) {
         case XCB_EXPOSE: {
+            begin_clock("XCB_EXPOSE");
+            xcb_expose_event_t *ev = (xcb_expose_event_t*)event;
+            UIRect region = { ev->x, ev->y, ev->width, ev->height };
+            window->invalid_region = ui_rect_united(&window->invalid_region, &region);
             window_invalidate_node(window, window->root);
+            end_clock();
             break;
         }
 
         case XCB_CONFIGURE_NOTIFY: {
+            begin_clock("XCB_CONFIGURE_NOTIFY");
             xcb_configure_notify_event_t *ev = (xcb_configure_notify_event_t*)event;
             UIRect new_rect = { 0, 0, ev->width, ev->height };
             if (!ui_rect_equals(&window->root->rect, &new_rect)) {
@@ -182,13 +190,14 @@ void _window_process_xcb_event(UIWindow *window, xcb_generic_event_t *event)
                 window->root->rect.w = ev->width;
                 window->root->rect.h = ev->height;
                 node_dispatch(window->root, UI_EVENT_RELAYOUT, 0, NULL);
-                window_invalidate_node(window, window->root);
                 node_dump(window->root, 0);
             }
+            end_clock();
             break;
         }
 
         case XCB_MOTION_NOTIFY: {
+            begin_clock("XCB_MOTION_NOTIFY");
             xcb_motion_notify_event_t *ev = (xcb_motion_notify_event_t*)event;
             UINode *node = node_by_point(window->root, ev->event_x, ev->event_y);
             if (node && node != window->hovered) {
@@ -199,11 +208,13 @@ void _window_process_xcb_event(UIWindow *window, xcb_generic_event_t *event)
                 }
                 node_dispatch(node, UI_EVENT_HOVERED, 0, NULL);
             }
+            end_clock();
             break;
         }
 
         case XCB_BUTTON_RELEASE: /* through  */
         case XCB_BUTTON_PRESS: {
+            begin_clock("XCB_BUTTON_PRESS");
             xcb_button_press_event_t *ev = (xcb_button_press_event_t*)event;
             UINode *node = node_by_point(window->root, ev->event_x, ev->event_y);
             if (node) {
@@ -254,6 +265,7 @@ void _window_process_xcb_event(UIWindow *window, xcb_generic_event_t *event)
                     }
                 }
             }
+            end_clock();
             break; 
         }
         
@@ -325,6 +337,7 @@ int window_turn(UIWindow *window)
 
         clear_summary();
 
+        begin_clock("Frame");
         int64_t frame_start_ms = time_current_ms();
         for (int i = 0; i < UI_WINDOW_MAX_POLL; i++) {
             if (fds[i].revents & POLLNVAL) {
@@ -389,7 +402,9 @@ int window_turn(UIWindow *window)
             printf("peak frametime: %ldms\n", frame_peak_ms);
         }
 
-        dump_summary();
+        end_clock();
+
+        dump_summary(stdout);
     }
     return 0;
 }