compositor: introduce weston_surface_geometry_dirty()

Instead of directly setting the dirty flag on weston_surface geometry,
use a function for that.

This allows us to hook into geometry dirtying in a following patch.

Also add comments to weston_surface fields, whose modification causes
transform state to become outdated.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>

5 files changed, 36 insertions, 31 deletions

diff --git a/src/animation.c b/src/animation.c
index 9e2ad4e..229946f 100644
--- a/src/animation.c
+++ b/src/animation.c
@@ -116,7 +116,7 @@ weston_surface_animation_destroy(struct weston_surface_animation *animation)
 	wl_list_remove(&animation->animation.link);
 	wl_list_remove(&animation->listener.link);
 	wl_list_remove(&animation->transform.link);
-	animation->surface->geometry.dirty = 1;
+	weston_surface_geometry_dirty(animation->surface);
 	if (animation->done)
 		animation->done(animation, animation->data);
 	free(animation);
@@ -153,7 +153,7 @@ weston_surface_animation_frame(struct weston_animation *base,
 	if (animation->frame)
 		animation->frame(animation);
 
-	animation->surface->geometry.dirty = 1;
+	weston_surface_geometry_dirty(animation->surface);
 	weston_compositor_schedule_repaint(animation->surface->compositor);
 }
 
diff --git a/src/compositor.c b/src/compositor.c
index 5253de4..cc8ffe2 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -304,7 +304,7 @@ weston_surface_create(struct weston_compositor *compositor)
 		       &surface->transform.position.link);
 	weston_matrix_init(&surface->transform.position.matrix);
 	pixman_region32_init(&surface->transform.boundingbox);
-	surface->geometry.dirty = 1;
+	surface->transform.dirty = 1;
 
 	surface->pending.buffer_destroy_listener.notify =
 		surface_handle_pending_buffer_destroy;
@@ -657,10 +657,10 @@ weston_surface_update_transform_enable(struct weston_surface *surface)
 WL_EXPORT void
 weston_surface_update_transform(struct weston_surface *surface)
 {
-	if (!surface->geometry.dirty)
+	if (!surface->transform.dirty)
 		return;
 
-	surface->geometry.dirty = 0;
+	surface->transform.dirty = 0;
 
 	weston_surface_damage_below(surface);
 
@@ -685,6 +685,12 @@ weston_surface_update_transform(struct weston_surface *surface)
 }
 
 WL_EXPORT void
+weston_surface_geometry_dirty(struct weston_surface *surface)
+{
+	surface->transform.dirty = 1;
+}
+
+WL_EXPORT void
 weston_surface_to_global_fixed(struct weston_surface *surface,
 			       wl_fixed_t sx, wl_fixed_t sy,
 			       wl_fixed_t *x, wl_fixed_t *y)
@@ -779,7 +785,7 @@ weston_surface_configure(struct weston_surface *surface,
 	surface->geometry.y = y;
 	surface->geometry.width = width;
 	surface->geometry.height = height;
-	surface->geometry.dirty = 1;
+	weston_surface_geometry_dirty(surface);
 }
 
 WL_EXPORT void
@@ -788,7 +794,7 @@ weston_surface_set_position(struct weston_surface *surface,
 {
 	surface->geometry.x = x;
 	surface->geometry.y = y;
-	surface->geometry.dirty = 1;
+	weston_surface_geometry_dirty(surface);
 }
 
 WL_EXPORT int
@@ -1441,7 +1447,7 @@ surface_commit(struct wl_client *client, struct wl_resource *resource)
 
 	if (!pixman_region32_equal(&opaque, &surface->opaque)) {
 		pixman_region32_copy(&surface->opaque, &opaque);
-		surface->geometry.dirty = 1;
+		weston_surface_geometry_dirty(surface);
 	}
 
 	pixman_region32_fini(&opaque);
diff --git a/src/compositor.h b/src/compositor.h
index 3fe5b16..f3e54d9 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -370,8 +370,8 @@ struct weston_region {
  * To add a transformation to a surface, create a struct weston_transform, and
  * add it to the list surface->geometry.transformation_list. Whenever you
  * change the list, anything under surface->geometry, or anything in the
- * weston_transforms linked into the list, you must set
- * surface->geometry.dirty = 1.
+ * weston_transforms linked into the list, you must call
+ * weston_surface_geometry_dirty().
  *
  * The order in the list defines the order of transformations. Let the list
  * contain the transformation matrices M1, ..., Mn as head to tail. The
@@ -395,17 +395,17 @@ struct weston_surface {
 	struct weston_compositor *compositor;
 	pixman_region32_t clip;
 	pixman_region32_t damage;
-	pixman_region32_t opaque;
+	pixman_region32_t opaque;        /* part of geometry, see below */
 	pixman_region32_t input;
 	struct wl_list link;
 	struct wl_list layer_link;
-	float alpha;
+	float alpha;                     /* part of geometry, see below */
 	struct weston_plane *plane;
 
 	void *renderer_state;
 
 	/* Surface geometry state, mutable.
-	 * If you change anything, set dirty = 1.
+	 * If you change anything, call weston_surface_geometry_dirty().
 	 * That includes the transformations referenced from the list.
 	 */
 	struct {
@@ -414,14 +414,14 @@ struct weston_surface {
 
 		/* struct weston_transform */
 		struct wl_list transformation_list;
-
-		int dirty;
 	} geometry;
 
 	/* State derived from geometry state, read-only.
 	 * This is updated by weston_surface_update_transform().
 	 */
 	struct {
+		int dirty;
+
 		pixman_region32_t boundingbox;
 		pixman_region32_t opaque;
 
@@ -500,6 +500,9 @@ void
 weston_surface_update_transform(struct weston_surface *surface);
 
 void
+weston_surface_geometry_dirty(struct weston_surface *surface);
+
+void
 weston_surface_to_global_fixed(struct weston_surface *surface,
 			       wl_fixed_t sx, wl_fixed_t sy,
 			       wl_fixed_t *x, wl_fixed_t *y);
diff --git a/src/shell.c b/src/shell.c
index 5a09bb6..26f0d60 100644
--- a/src/shell.c
+++ b/src/shell.c
@@ -610,7 +610,7 @@ surface_translate(struct weston_surface *surface, double d)
 	weston_matrix_init(&shsurf->workspace_transform.matrix);
 	weston_matrix_translate(&shsurf->workspace_transform.matrix,
 				0.0, d, 0.0);
-	surface->geometry.dirty = 1;
+	weston_surface_geometry_dirty(surface);
 }
 
 static void
@@ -686,7 +686,7 @@ workspace_deactivate_transforms(struct workspace *ws)
 			wl_list_remove(&shsurf->workspace_transform.link);
 			wl_list_init(&shsurf->workspace_transform.link);
 		}
-		shsurf->surface->geometry.dirty = 1;
+		weston_surface_geometry_dirty(surface);
 	}
 }
 
@@ -1530,7 +1530,7 @@ set_surface_type(struct shell_surface *shsurf)
 		if (!wl_list_empty(&shsurf->rotation.transform.link)) {
 			wl_list_remove(&shsurf->rotation.transform.link);
 			wl_list_init(&shsurf->rotation.transform.link);
-			shsurf->surface->geometry.dirty = 1;
+			weston_surface_geometry_dirty(shsurf->surface);
 			shsurf->saved_rotation_valid = true;
 		}
 		break;
@@ -2480,7 +2480,7 @@ surface_opacity_binding(struct wl_seat *seat, uint32_t time, uint32_t axis,
 	if (surface->alpha < step)
 		surface->alpha = step;
 
-	surface->geometry.dirty = 1;
+	weston_surface_geometry_dirty(surface);
 	weston_surface_damage(surface);
 }
 
@@ -2574,7 +2574,7 @@ rotate_grab_motion(struct wl_pointer_grab *grab,
 	r = sqrtf(dx * dx + dy * dy);
 
 	wl_list_remove(&shsurf->rotation.transform.link);
-	shsurf->surface->geometry.dirty = 1;
+	weston_surface_geometry_dirty(shsurf->surface);
 
 	if (r > 20.0f) {
 		struct weston_matrix *matrix =
@@ -2939,7 +2939,7 @@ show_input_panels(struct wl_listener *listener, void *data)
 		ws = surface->surface;
 		wl_list_insert(&shell->input_panel_layer.surface_list,
 			       &ws->layer_link);
-		ws->geometry.dirty = 1;
+		weston_surface_geometry_dirty(ws);
 		weston_surface_update_transform(ws);
 		weston_surface_damage(ws);
 		weston_slide_run(ws, ws->geometry.height, 0, NULL, NULL);
@@ -3056,7 +3056,7 @@ map(struct desktop_shell *shell, struct weston_surface *surface,
 
 	surface->geometry.width = width;
 	surface->geometry.height = height;
-	surface->geometry.dirty = 1;
+	weston_surface_geometry_dirty(surface);
 
 	/* initial positioning, see also configure() */
 	switch (surface_type) {
@@ -3150,11 +3150,7 @@ configure(struct desktop_shell *shell, struct weston_surface *surface,
 	if (shsurf)
 		surface_type = shsurf->type;
 
-	surface->geometry.x = x;
-	surface->geometry.y = y;
-	surface->geometry.width = width;
-	surface->geometry.height = height;
-	surface->geometry.dirty = 1;
+	weston_surface_configure(surface, x, y, width, height);
 
 	switch (surface_type) {
 	case SHELL_SURFACE_FULLSCREEN:
@@ -3586,7 +3582,7 @@ switcher_next(struct switcher *switcher)
 				next = surface;
 			prev = surface;
 			surface->alpha = 0.25;
-			surface->geometry.dirty = 1;
+			weston_surface_geometry_dirty(surface);
 			weston_surface_damage(surface);
 			break;
 		default:
@@ -3595,7 +3591,7 @@ switcher_next(struct switcher *switcher)
 
 		if (is_black_surface(surface, NULL)) {
 			surface->alpha = 0.25;
-			surface->geometry.dirty = 1;
+			weston_surface_geometry_dirty(surface);
 			weston_surface_damage(surface);
 		}
 	}
diff --git a/src/xwayland/window-manager.c b/src/xwayland/window-manager.c
index 9c7638f..8f0a377 100644
--- a/src/xwayland/window-manager.c
+++ b/src/xwayland/window-manager.c
@@ -823,7 +823,7 @@ weston_wm_window_draw_decoration(void *data)
 					  x - 1, y - 1,
 					  window->width + 2,
 					  window->height + 2);
-		window->surface->geometry.dirty = 1;
+		weston_surface_geometry_dirty(window->surface);
 	}
 
 	if (window->surface && !window->fullscreen) {
@@ -847,7 +847,7 @@ weston_wm_window_schedule_repaint(struct weston_wm_window *window)
 			pixman_region32_fini(&window->surface->pending.opaque);
 			pixman_region32_init_rect(&window->surface->pending.opaque, 0, 0,
 						  width, height);
-			window->surface->geometry.dirty = 1;
+			weston_surface_geometry_dirty(window->surface);
 		}
 		return;
 	}