commit d305f91

seat: Add pointer region

 1@@ -384,6 +384,8 @@ bool swc_compositor_initialize(struct swc_compositor * compositor,
 2     struct wl_event_loop * event_loop;
 3     struct udev_device * drm_device;
 4     struct wl_list * outputs;
 5+    struct swc_output * output;
 6+    pixman_region32_t pointer_region;
 7     xkb_keysym_t keysym;
 8 
 9     compositor->display = display;
10@@ -454,6 +456,20 @@ bool swc_compositor_initialize(struct swc_compositor * compositor,
11         goto error_renderer;
12     }
13 
14+    /* Calculate pointer region */
15+    pixman_region32_init(&pointer_region);
16+
17+    wl_list_for_each(output, &compositor->outputs, link)
18+    {
19+        pixman_region32_union_rect(&pointer_region, &pointer_region,
20+                                   output->geometry.x, output->geometry.y,
21+                                   output->geometry.width,
22+                                   output->geometry.height);
23+    }
24+
25+    swc_seat_set_pointer_region(&compositor->seat, &pointer_region);
26+    pixman_region32_fini(&pointer_region);
27+
28     pixman_region32_init(&compositor->damage);
29     pixman_region32_init(&compositor->opaque);
30     wl_list_init(&compositor->surfaces);

 1@@ -8,6 +8,7 @@
 2 #include <stdlib.h>
 3 #include <stdio.h>
 4 #include <string.h>
 5+#include <assert.h>
 6 
 7 struct evdev_device_entry
 8 {
 9@@ -17,6 +18,30 @@ struct evdev_device_entry
10     struct wl_list link;
11 };
12 
13+static void clip_position(struct swc_seat * seat, wl_fixed_t fx, wl_fixed_t fy)
14+{
15+    int32_t x, y, last_x, last_y;
16+    pixman_box32_t box;
17+
18+    x = wl_fixed_to_int(fx);
19+    y = wl_fixed_to_int(fy);
20+    last_x = wl_fixed_to_int(seat->pointer.x);
21+    last_y = wl_fixed_to_int(seat->pointer.y);
22+
23+    if (!pixman_region32_contains_point(&seat->pointer_region, x, y, NULL))
24+    {
25+        assert(pixman_region32_contains_point(&seat->pointer_region,
26+                                              last_x, last_y, &box));
27+
28+        /* Do some clipping. */
29+        x = MAX(MIN(x, box.x2 - 1), box.x1);
30+        y = MAX(MIN(y, box.y2 - 1), box.y1);
31+    }
32+
33+    seat->pointer.x = wl_fixed_from_int(x);
34+    seat->pointer.y = wl_fixed_from_int(y);
35+}
36+
37 static void handle_key(struct swc_seat * seat, uint32_t time, uint32_t key,
38                        uint32_t state)
39 {
40@@ -340,6 +365,7 @@ bool swc_seat_initialize(struct swc_seat * seat, struct udev * udev,
41 
42     wl_list_init(&seat->resources);
43     wl_signal_init(&seat->destroy_signal);
44+    pixman_region32_init(&seat->pointer_region);
45     wl_list_init(&seat->devices);
46     swc_seat_add_devices(seat, udev);
47 
48@@ -415,3 +441,10 @@ void swc_seat_add_devices(struct swc_seat * seat, struct udev * udev)
49     udev_enumerate_unref(enumerate);
50 }
51 
52+void swc_seat_set_pointer_region(struct swc_seat * seat,
53+                                 pixman_region32_t * region)
54+{
55+    pixman_region32_copy(&seat->pointer_region, region);
56+    clip_position(seat, seat->pointer.x, seat->pointer.y);
57+}
58+

 1@@ -10,6 +10,7 @@
 2 #include <stdbool.h>
 3 #include <libudev.h>
 4 #include <wayland-server.h>
 5+#include <pixman.h>
 6 
 7 struct swc_seat
 8 {
 9@@ -28,6 +29,7 @@ struct swc_seat
10     struct wl_listener keyboard_focus_listener;
11 
12     struct swc_pointer pointer;
13+    pixman_region32_t pointer_region;
14 
15     struct wl_list devices;
16 };
17@@ -44,5 +46,8 @@ void swc_seat_add_event_sources(struct swc_seat * seat,
18 
19 void swc_seat_add_devices(struct swc_seat * seat, struct udev * udev);
20 
21+void swc_seat_set_pointer_region(struct swc_seat * seat,
22+                                 pixman_region32_t * region);
23+
24 #endif
25