Add lite damage tracking

This skips the renderer if nothing has changed, and renders
everything otherwise.

11 files changed, 171 insertions, 66 deletions

diff --git a/include/sway/output.h b/include/sway/output.h
index 6fb79987..b4980cd8 100644
--- a/include/sway/output.h
+++ b/include/sway/output.h
@@ -5,6 +5,7 @@
 #include <wayland-server.h>
 #include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_output.h>
+#include "sway/tree/view.h"
 
 struct sway_server;
 struct sway_container;
@@ -13,17 +14,26 @@ struct sway_output {
         struct wlr_output *wlr_output;
         struct sway_container *swayc;
         struct sway_server *server;
-        struct timespec last_frame;
 
         struct wl_list layers[4]; // sway_layer_surface::link
         struct wlr_box usable_area;
 
-        struct wl_listener frame;
+        struct timespec last_frame;
+        struct wlr_output_damage *damage;
+
         struct wl_listener destroy;
         struct wl_listener mode;
         struct wl_listener transform;
 
+        struct wl_listener damage_destroy;
+        struct wl_listener damage_frame;
+
         pid_t bg_pid;
 };
 
+void output_damage_whole(struct sway_output *output);
+
+void output_damage_whole_view(struct sway_output *output,
+        struct sway_view *view);
+
 #endif
diff --git a/include/sway/server.h b/include/sway/server.h
index db81932f..61f21cdb 100644
--- a/include/sway/server.h
+++ b/include/sway/server.h
@@ -25,7 +25,6 @@ struct sway_server {
         struct sway_input_manager *input;
 
         struct wl_listener new_output;
-        struct wl_listener output_frame;
 
         struct wlr_layer_shell *layer_shell;
         struct wl_listener layer_shell_surface;
diff --git a/include/sway/tree/view.h b/include/sway/tree/view.h
index 54f6d90e..526a8485 100644
--- a/include/sway/tree/view.h
+++ b/include/sway/tree/view.h
@@ -113,4 +113,8 @@ void view_close(struct sway_view *view);
 
 void view_update_outputs(struct sway_view *view, const struct wlr_box *before);
 
+void view_damage_whole(struct sway_view *view);
+
+void view_damage_from(struct sway_view *view);
+
 #endif
diff --git a/sway/desktop/layer_shell.c b/sway/desktop/layer_shell.c
index f7e5d19c..5c96659a 100644
--- a/sway/desktop/layer_shell.c
+++ b/sway/desktop/layer_shell.c
@@ -4,12 +4,13 @@
 #include <wayland-server.h>
 #include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_layer_shell.h>
+#include <wlr/types/wlr_output_damage.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/util/log.h>
 #include "sway/layers.h"
-#include "sway/tree/layout.h"
 #include "sway/output.h"
 #include "sway/server.h"
+#include "sway/tree/layout.h"
 
 static void apply_exclusive(struct wlr_box *usable_area,
                 uint32_t anchor, int32_t exclusive,
@@ -210,20 +211,26 @@ static void handle_surface_commit(struct wl_listener *listener, void *data) {
                 } else {
                         // TODO DAMAGE from surface damage
                 }
+                wlr_output_damage_add_box(output->damage, &old_geo);
+                wlr_output_damage_add_box(output->damage, &layer->geo);
         }
 }
 
-static void unmap(struct wlr_layer_surface *layer_surface) {
-        // TODO DAMAGE
+static void unmap(struct sway_layer_surface *sway_layer) {
+        struct wlr_output *wlr_output = sway_layer->layer_surface->output;
+        if (wlr_output != NULL) {
+                struct sway_output *output = wlr_output->data;
+                wlr_output_damage_add_box(output->damage, &sway_layer->geo);
+        }
 }
 
 static void handle_destroy(struct wl_listener *listener, void *data) {
-        struct sway_layer_surface *sway_layer = wl_container_of(
-                        listener, sway_layer, destroy);
+        struct sway_layer_surface *sway_layer = wl_container_of(listener,
+                        sway_layer, destroy);
         wlr_log(L_DEBUG, "Layer surface destroyed (%s)",
                         sway_layer->layer_surface->namespace);
         if (sway_layer->layer_surface->mapped) {
-                unmap(sway_layer->layer_surface);
+                unmap(sway_layer);
         }
         wl_list_remove(&sway_layer->link);
         wl_list_remove(&sway_layer->destroy.link);
@@ -239,13 +246,16 @@ static void handle_destroy(struct wl_listener *listener, void *data) {
 }
 
 static void handle_map(struct wl_listener *listener, void *data) {
-        // TODO DAMAGE
+        struct sway_layer_surface *sway_layer = wl_container_of(listener,
+                        sway_layer, map);
+        struct sway_output *output = sway_layer->layer_surface->output->data;
+        wlr_output_damage_add_box(output->damage, &sway_layer->geo);
 }
 
 static void handle_unmap(struct wl_listener *listener, void *data) {
         struct sway_layer_surface *sway_layer = wl_container_of(
                         listener, sway_layer, unmap);
-        unmap(sway_layer->layer_surface);
+        unmap(sway_layer);
 }
 
 void handle_layer_shell_surface(struct wl_listener *listener, void *data) {
diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index f3416c03..ea457996 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -6,18 +6,19 @@
 #include <wlr/render/wlr_renderer.h>
 #include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_matrix.h>
-#include <wlr/types/wlr_output.h>
+#include <wlr/types/wlr_output_damage.h>
 #include <wlr/types/wlr_output_layout.h>
+#include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_surface.h>
 #include <wlr/types/wlr_wl_shell.h>
 #include "log.h"
-#include "sway/tree/container.h"
 #include "sway/input/input-manager.h"
 #include "sway/input/seat.h"
 #include "sway/layers.h"
-#include "sway/tree/layout.h"
 #include "sway/output.h"
 #include "sway/server.h"
+#include "sway/tree/container.h"
+#include "sway/tree/layout.h"
 #include "sway/tree/view.h"
 
 /**
@@ -145,13 +146,13 @@ static void render_wl_shell_surface(struct wlr_wl_shell_surface *surface,
 
 struct render_data {
         struct sway_output *output;
-        struct timespec *now;
+        struct timespec *when;
 };
 
-static void output_frame_view(struct sway_container *view, void *data) {
+static void render_view(struct sway_container *view, void *data) {
         struct render_data *rdata = data;
         struct sway_output *output = rdata->output;
-        struct timespec *now = rdata->now;
+        struct timespec *when = rdata->when;
         struct wlr_output *wlr_output = output->wlr_output;
         struct sway_view *sway_view = view->sway_view;
         struct wlr_surface *surface = sway_view->surface;
@@ -164,18 +165,18 @@ static void output_frame_view(struct sway_container *view, void *data) {
         case SWAY_XDG_SHELL_V6_VIEW: {
                 int window_offset_x = view->sway_view->wlr_xdg_surface_v6->geometry.x;
                 int window_offset_y = view->sway_view->wlr_xdg_surface_v6->geometry.y;
-                render_surface(surface, wlr_output, now,
+                render_surface(surface, wlr_output, when,
                         view->x - window_offset_x, view->y - window_offset_y, 0);
                 render_xdg_v6_popups(sway_view->wlr_xdg_surface_v6, wlr_output,
-                        now, view->x - window_offset_x, view->y - window_offset_y, 0);
+                        when, view->x - window_offset_x, view->y - window_offset_y, 0);
                 break;
         }
         case SWAY_WL_SHELL_VIEW:
                 render_wl_shell_surface(sway_view->wlr_wl_shell_surface, wlr_output,
-                        now, view->x, view->y, 0, false);
+                        when, view->x, view->y, 0, false);
                 break;
         case SWAY_XWAYLAND_VIEW:
-                render_surface(surface, wlr_output, now, view->x, view->y, 0);
+                render_surface(surface, wlr_output, when, view->x, view->y, 0);
                 break;
         default:
                 break;
@@ -195,82 +196,134 @@ static void render_layer(struct sway_output *output,
         }
 }
 
-static void handle_output_frame(struct wl_listener *listener, void *data) {
-        struct sway_output *soutput = wl_container_of(listener, soutput, frame);
-        struct wlr_output *wlr_output = data;
+static void render_output(struct sway_output *output, struct timespec *when,
+                pixman_region32_t *damage) {
+        wlr_log(L_DEBUG, "render");
+        struct wlr_output *wlr_output = output->wlr_output;
         struct wlr_renderer *renderer =
                 wlr_backend_get_renderer(wlr_output->backend);
 
-        wlr_output_make_current(wlr_output, NULL);
         wlr_renderer_begin(renderer, wlr_output->width, wlr_output->height);
 
+        if (!pixman_region32_not_empty(damage)) {
+                // Output isn't damaged but needs buffer swap
+                goto renderer_end;
+        }
+
+        // TODO
+        int width, height;
+        wlr_output_transformed_resolution(wlr_output, &width, &height);
+        pixman_region32_union_rect(damage, damage, 0, 0, width, height);
+
         float clear_color[] = {0.25f, 0.25f, 0.25f, 1.0f};
         wlr_renderer_clear(renderer, clear_color);
 
-        struct timespec now;
-        clock_gettime(CLOCK_MONOTONIC, &now);
-
         struct wlr_output_layout *layout = root_container.sway_root->output_layout;
-        const struct wlr_box *output_box = wlr_output_layout_get_box(
-                        layout, wlr_output);
+        const struct wlr_box *output_box =
+                        wlr_output_layout_get_box(layout, wlr_output);
 
-        render_layer(soutput, output_box, &now,
-                        &soutput->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND]);
-        render_layer(soutput, output_box, &now,
-                        &soutput->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM]);
+        render_layer(output, output_box, when,
+                        &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND]);
+        render_layer(output, output_box, when,
+                        &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM]);
 
         struct sway_seat *seat = input_manager_current_seat(input_manager);
         struct sway_container *focus =
-                sway_seat_get_focus_inactive(seat, soutput->swayc);
+                sway_seat_get_focus_inactive(seat, output->swayc);
         struct sway_container *workspace = (focus->type == C_WORKSPACE ?
                         focus :
                         container_parent(focus, C_WORKSPACE));
 
         struct render_data rdata = {
-                .output = soutput,
-                .now = &now,
+                .output = output,
+                .when = when,
         };
-        container_descendants(workspace, C_VIEW, output_frame_view, &rdata);
+        container_descendants(workspace, C_VIEW, render_view, &rdata);
 
         // render unmanaged views on top
         struct sway_view *view;
         wl_list_for_each(view, &root_container.sway_root->unmanaged_views,
                         unmanaged_view_link) {
                 if (view->type == SWAY_XWAYLAND_VIEW) {
-                        // the only kind of unamanged view right now is xwayland override redirect
+                        // the only kind of unamanged view right now is xwayland override
+                        // redirect
                         int view_x = view->wlr_xwayland_surface->x;
                         int view_y = view->wlr_xwayland_surface->y;
-                        render_surface(view->surface, wlr_output, &soutput->last_frame,
+                        render_surface(view->surface, wlr_output, &output->last_frame,
                                         view_x, view_y, 0);
                 }
         }
 
         // TODO: Consider revising this when fullscreen windows are supported
-        render_layer(soutput, output_box, &now,
-                        &soutput->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP]);
-        render_layer(soutput, output_box, &now,
-                        &soutput->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);
+        render_layer(output, output_box, when,
+                        &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP]);
+        render_layer(output, output_box, when,
+                        &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);
 
+renderer_end:
         wlr_renderer_end(renderer);
-        wlr_output_swap_buffers(wlr_output, &now, NULL);
-        soutput->last_frame = now;
+        if (!wlr_output_damage_swap_buffers(output->damage, when, damage)) {
+                return;
+        }
+        output->last_frame = *when;
 }
 
-static void handle_output_destroy(struct wl_listener *listener, void *data) {
-        struct sway_output *output = wl_container_of(listener, output, destroy);
+static void damage_handle_frame(struct wl_listener *listener, void *data) {
+        struct sway_output *output =
+                wl_container_of(listener, output, damage_frame);
         struct wlr_output *wlr_output = data;
-        wlr_log(L_DEBUG, "Output %p %s removed", wlr_output, wlr_output->name);
 
+        if (!wlr_output->enabled) {
+                return;
+        }
+
+        struct timespec now;
+        clock_gettime(CLOCK_MONOTONIC, &now);
+
+        bool needs_swap;
+        pixman_region32_t damage;
+        pixman_region32_init(&damage);
+        if (!wlr_output_damage_make_current(output->damage, &needs_swap, &damage)) {
+                return;
+        }
+
+        if (needs_swap) {
+                render_output(output, &now, &damage);
+        }
+
+        pixman_region32_fini(&damage);
+
+        // TODO: send frame done events here instead of inside render_surface
+}
+
+void output_damage_whole(struct sway_output *output) {
+        wlr_output_damage_add_whole(output->damage);
+}
+
+void output_damage_whole_view(struct sway_output *output,
+                struct sway_view *view) {
+        // TODO
+        output_damage_whole(output);
+}
+
+static void damage_handle_destroy(struct wl_listener *listener, void *data) {
+        struct sway_output *output =
+                wl_container_of(listener, output, damage_destroy);
+        container_output_destroy(output->swayc);
+}
+
+static void handle_destroy(struct wl_listener *listener, void *data) {
+        struct sway_output *output = wl_container_of(listener, output, destroy);
         container_output_destroy(output->swayc);
 }
 
-static void handle_output_mode(struct wl_listener *listener, void *data) {
+static void handle_mode(struct wl_listener *listener, void *data) {
         struct sway_output *output = wl_container_of(listener, output, mode);
         arrange_layers(output);
         arrange_windows(output->swayc, -1, -1);
 }
 
-static void handle_output_transform(struct wl_listener *listener, void *data) {
+static void handle_transform(struct wl_listener *listener, void *data) {
         struct sway_output *output = wl_container_of(listener, output, transform);
         arrange_layers(output);
         arrange_windows(output->swayc, -1, -1);
@@ -295,6 +348,8 @@ void handle_new_output(struct wl_listener *listener, void *data) {
                 wlr_output_set_mode(wlr_output, mode);
         }
 
+        output->damage = wlr_output_damage_create(wlr_output);
+
         output->swayc = container_output_create(output);
         if (!output->swayc) {
                 free(output);
@@ -308,14 +363,17 @@ void handle_new_output(struct wl_listener *listener, void *data) {
 
         sway_input_manager_configure_xcursor(input_manager);
 
-        wl_signal_add(&wlr_output->events.frame, &output->frame);
-        output->frame.notify = handle_output_frame;
         wl_signal_add(&wlr_output->events.destroy, &output->destroy);
-        output->destroy.notify = handle_output_destroy;
+        output->destroy.notify = handle_destroy;
         wl_signal_add(&wlr_output->events.mode, &output->mode);
-        output->mode.notify = handle_output_mode;
+        output->mode.notify = handle_mode;
         wl_signal_add(&wlr_output->events.transform, &output->transform);
-        output->transform.notify = handle_output_transform;
+        output->transform.notify = handle_transform;
+
+        wl_signal_add(&output->damage->events.frame, &output->damage_frame);
+        output->damage_frame.notify = damage_handle_frame;
+        wl_signal_add(&output->damage->events.destroy, &output->damage_destroy);
+        output->damage_destroy.notify = damage_handle_destroy;
 
         arrange_layers(output);
         arrange_windows(&root_container, -1, -1);
diff --git a/sway/desktop/wl_shell.c b/sway/desktop/wl_shell.c
index 4d4d1ed7..4fcc6317 100644
--- a/sway/desktop/wl_shell.c
+++ b/sway/desktop/wl_shell.c
@@ -67,6 +67,7 @@ static void handle_commit(struct wl_listener *listener, void *data) {
         // TODO: Let floating views do whatever
         view->width = sway_surface->pending_width;
         view->height = sway_surface->pending_height;
+        view_damage_from(view);
 }
 
 static void handle_destroy(struct wl_listener *listener, void *data) {
diff --git a/sway/desktop/xdg_shell_v6.c b/sway/desktop/xdg_shell_v6.c
index 01f38d16..68abc120 100644
--- a/sway/desktop/xdg_shell_v6.c
+++ b/sway/desktop/xdg_shell_v6.c
@@ -76,6 +76,7 @@ static void handle_commit(struct wl_listener *listener, void *data) {
         // TODO: Let floating views do whatever
         view->width = sway_surface->pending_width;
         view->height = sway_surface->pending_height;
+        view_damage_from(view);
 }
 
 static void handle_destroy(struct wl_listener *listener, void *data) {
@@ -123,12 +124,12 @@ void handle_xdg_shell_v6_surface(struct wl_listener *listener, void *data) {
         sway_view->sway_xdg_surface_v6 = sway_surface;
         sway_view->surface = xdg_surface->surface;
         sway_surface->view = sway_view;
-        
+
         // TODO:
         // - Look up pid and open on appropriate workspace
         // - Set new view to maximized so it behaves nicely
         // - Criteria
-        
+
         sway_surface->commit.notify = handle_commit;
         wl_signal_add(&xdg_surface->surface->events.commit, &sway_surface->commit);
 
diff --git a/sway/desktop/xwayland.c b/sway/desktop/xwayland.c
index dfc54e86..79c675a0 100644
--- a/sway/desktop/xwayland.c
+++ b/sway/desktop/xwayland.c
@@ -14,10 +14,10 @@
 #include "sway/input/input-manager.h"
 #include "log.h"
 
- static bool assert_xwayland(struct sway_view *view) {
-         return sway_assert(view->type == SWAY_XWAYLAND_VIEW && view->wlr_xwayland_surface,
-                 "Expected xwayland view!");
- }
+static bool assert_xwayland(struct sway_view *view) {
+        return sway_assert(view->type == SWAY_XWAYLAND_VIEW,
+                "Expected xwayland view!");
+}
 
 static const char *get_prop(struct sway_view *view, enum sway_view_prop prop) {
         if (!assert_xwayland(view)) {
@@ -99,6 +99,7 @@ static void handle_commit(struct wl_listener *listener, void *data) {
         // TODO: Let floating views do whatever
         view->width = sway_surface->pending_width;
         view->height = sway_surface->pending_height;
+        view_damage_from(view);
 }
 
 static void handle_destroy(struct wl_listener *listener, void *data) {
@@ -117,7 +118,7 @@ static void handle_destroy(struct wl_listener *listener, void *data) {
 static void handle_unmap(struct wl_listener *listener, void *data) {
         struct sway_xwayland_surface *sway_surface =
                 wl_container_of(listener, sway_surface, unmap);
-  
+        view_damage_whole(sway_surface->view);
         wl_list_remove(&sway_surface->view->unmanaged_view_link);
         wl_list_init(&sway_surface->view->unmanaged_view_link);
         container_view_destroy(sway_surface->view->swayc);
@@ -150,6 +151,8 @@ static void handle_map(struct wl_listener *listener, void *data) {
                 arrange_windows(cont->parent, -1, -1);
                 sway_input_manager_set_focus(input_manager, cont);
         }
+
+        view_damage_whole(sway_surface->view);
 }
 
 static void handle_configure_request(struct wl_listener *listener, void *data) {
diff --git a/sway/tree/container.c b/sway/tree/container.c
index c3cf6c64..8705edc7 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -6,8 +6,8 @@
 #include <wayland-server.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_wl_shell.h>
+#include "log.h"
 #include "sway/config.h"
-#include "sway/tree/container.h"
 #include "sway/input/input-manager.h"
 #include "sway/input/seat.h"
 #include "sway/ipc-server.h"
diff --git a/sway/tree/output.c b/sway/tree/output.c
index 2246cb11..7248fd00 100644
--- a/sway/tree/output.c
+++ b/sway/tree/output.c
@@ -26,9 +26,12 @@ struct sway_container *container_output_destroy(struct sway_container *output) {
                 }
         }
 
-        wl_list_remove(&output->sway_output->frame.link);
         wl_list_remove(&output->sway_output->destroy.link);
         wl_list_remove(&output->sway_output->mode.link);
+        wl_list_remove(&output->sway_output->transform.link);
+
+        wl_list_remove(&output->sway_output->damage_destroy.link);
+        wl_list_remove(&output->sway_output->damage_frame.link);
 
         wlr_log(L_DEBUG, "OUTPUT: Destroying output '%s'", output->name);
         container_destroy(output);
diff --git a/sway/tree/view.c b/sway/tree/view.c
index 480ff693..b7d1a41b 100644
--- a/sway/tree/view.c
+++ b/sway/tree/view.c
@@ -1,9 +1,10 @@
 #include <wayland-server.h>
 #include <wlr/types/wlr_output_layout.h>
+#include "log.h"
+#include "sway/output.h"
 #include "sway/tree/container.h"
 #include "sway/tree/layout.h"
 #include "sway/tree/view.h"
-#include "log.h"
 
 const char *view_get_title(struct sway_view *view) {
         if (view->iface.get_prop) {
@@ -105,3 +106,18 @@ struct sway_container *container_view_destroy(struct sway_container *view) {
         arrange_windows(parent, -1, -1);
         return parent;
 }
+
+void view_damage_whole(struct sway_view *view) {
+        struct sway_container *cont = NULL;
+        for (int i = 0; i < root_container.children->length; ++i) {
+                cont = root_container.children->items[i];
+                if (cont->type == C_OUTPUT) {
+                        output_damage_whole_view(cont->sway_output, view);
+                }
+        }
+}
+
+void view_damage_from(struct sway_view *view) {
+        // TODO
+        view_damage_whole(view);
+}