Implement animated transitions for zoom in/out.
diff --git a/src/compositor.c b/src/compositor.c
index 09de2f6..609ca21 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -1640,7 +1640,7 @@
if (output->zoom.active &&
pixman_region32_contains_point(&output->region,
ix, iy, NULL))
- weston_output_update_zoom(output, x, y, ZOOM_POINTER);
+ weston_output_update_zoom(output, x, y, ZOOM_FOCUS_POINTER);
weston_device_repick(seat);
interface = seat->pointer->grab->interface;
@@ -2734,7 +2734,49 @@
wl_fixed_to_int(global_y),
NULL))
weston_output_update_zoom(output, global_x, global_y,
- ZOOM_TEXT_CURSOR);
+ ZOOM_FOCUS_TEXT);
+}
+
+static void
+weston_zoom_frame_z(struct weston_animation *animation,
+ struct weston_output *output, uint32_t msecs)
+{
+ if (animation->frame_counter == 0)
+ output->zoom.spring_z.timestamp = msecs;
+
+ weston_spring_update(&output->zoom.spring_z, msecs);
+
+ if (output->zoom.spring_z.current > output->zoom.max_level)
+ output->zoom.spring_z.current = output->zoom.max_level;
+ else if (output->zoom.spring_z.current < 0.0)
+ output->zoom.spring_z.current = 0.0;
+
+ if (weston_spring_done(&output->zoom.spring_z)) {
+ if (output->zoom.level <= 0.0)
+ output->zoom.active = 0;
+ output->zoom.spring_z.current = output->zoom.level;
+ wl_list_remove(&animation->link);
+ wl_list_init(&animation->link);
+ }
+
+ output->dirty = 1;
+ weston_output_damage(output);
+}
+
+static void
+weston_zoom_transition(struct weston_output *output)
+{
+ if (output->zoom.level != output->zoom.spring_z.current) {
+ output->zoom.spring_z.target = output->zoom.level;
+ if (wl_list_empty(&output->zoom.animation_z.link)) {
+ output->zoom.animation_z.frame_counter = 0;
+ wl_list_insert(output->animation_list.prev,
+ &output->zoom.animation_z.link);
+ }
+ }
+
+ output->dirty = 1;
+ weston_output_damage(output);
}
WL_EXPORT void
@@ -2745,25 +2787,35 @@
{
float global_x, global_y;
float trans_min, trans_max;
+ float ratio, level;
- if (output->zoom.level >= 1.0)
+ level = output->zoom.spring_z.current;
+
+ if (!output->zoom.active || level > output->zoom.max_level)
return;
+ output->zoom.type = type;
+
+ output->zoom.fx = x;
+ output->zoom.fy = y;
+
global_x = wl_fixed_to_double(x);
global_y = wl_fixed_to_double(y);
output->zoom.trans_x =
(((global_x - output->x) / output->current->width) *
- (output->zoom.level * 2)) - output->zoom.level;
+ (level * 2)) - level;
output->zoom.trans_y =
(((global_y - output->y) / output->current->height) *
- (output->zoom.level * 2)) - output->zoom.level;
+ (level * 2)) - level;
- if (type == ZOOM_TEXT_CURSOR) {
- output->zoom.trans_x *= 1 / output->zoom.level;
- output->zoom.trans_y *= 1 / output->zoom.level;
+ if (type == ZOOM_FOCUS_TEXT) {
+ ratio = 1 / level;
- trans_max = output->zoom.level * 2 - output->zoom.level;
+ output->zoom.trans_x *= ratio;
+ output->zoom.trans_y *= ratio;
+
+ trans_max = level * 2 - level;
trans_min = -trans_max;
if (output->zoom.trans_x > trans_max)
@@ -2776,8 +2828,7 @@
output->zoom.trans_y = trans_min;
}
- output->dirty = 1;
- weston_output_damage(output);
+ weston_zoom_transition(output);
}
WL_EXPORT void
@@ -2799,10 +2850,14 @@
flip * 2.0 / (output->current->height + output->border.top + output->border.bottom), 1);
if (output->zoom.active) {
- magnification = 1 / (1 - output->zoom.level);
+ magnification = 1 / (1 - output->zoom.spring_z.current);
weston_matrix_init(&camera);
weston_matrix_init(&modelview);
- weston_matrix_translate(&camera, output->zoom.trans_x, flip * output->zoom.trans_y, 0);
+ weston_output_update_zoom(output, output->zoom.fx,
+ output->zoom.fy,
+ output->zoom.type);
+ weston_matrix_translate(&camera, output->zoom.trans_x,
+ flip * output->zoom.trans_y, 0);
weston_matrix_invert(&modelview, &camera);
weston_matrix_scale(&modelview, magnification, magnification, 1.0);
weston_matrix_multiply(&output->matrix, &modelview);
@@ -2840,10 +2895,15 @@
wl_list_init(&output->read_pixels_list);
output->zoom.active = 0;
- output->zoom.increment = 0.05;
+ output->zoom.increment = 0.07;
+ output->zoom.max_level = 0.95;
output->zoom.level = 0.0;
output->zoom.trans_x = 0.0;
output->zoom.trans_y = 0.0;
+ weston_spring_init(&output->zoom.spring_z, 250.0, 0.0, 0.0);
+ output->zoom.spring_z.friction = 1000;
+ output->zoom.animation_z.frame = weston_zoom_frame_z;
+ wl_list_init(&output->zoom.animation_z.link);
output->flags = flags;
weston_output_move(output, x, y);