From f8bfd0581b37449a5e91d8b190f8a5bbde6bca1e Mon Sep 17 00:00:00 2001 From: Jonny Lamb Date: Thu, 22 May 2014 22:41:33 +0200 Subject: [PATCH] animation: ensure repaints are always scheduled during animations Animations are run off the repaint cycle so if there's nothing to repaint, an animation will stop running. This is usually not a problem as each frame function of an animation causes something to change and therefore a repaint to happen. This patch helps detect when the animation isn't in said case and triggers a repaint to keep the animation running. This problem was found by using weston_move_scale_run() to move a view onscreen from completely off. The very first time the animation frame function was called the progress wasn't enough to move it into view. The compositor saw there was nothing to repaint and stopped doing anything else. When something else (like a pointer move) forced a redraw, the view's position was very much onscreen and jumped into view in an ugly way. --- src/animation.c | 11 +++++++++++ src/spring-tool.c | 5 +++++ 2 files changed, 16 insertions(+) diff --git a/src/animation.c b/src/animation.c index 392e32d..5ded3ad 100644 --- a/src/animation.c +++ b/src/animation.c @@ -161,6 +161,8 @@ weston_view_animation_frame(struct weston_animation *base, struct weston_view_animation *animation = container_of(base, struct weston_view_animation, animation); + struct weston_compositor *compositor = + animation->view->surface->compositor; if (base->frame_counter <= 1) animation->spring.timestamp = msecs; @@ -178,6 +180,15 @@ weston_view_animation_frame(struct weston_animation *base, weston_view_geometry_dirty(animation->view); weston_view_schedule_repaint(animation->view); + + /* The view's output_mask will be zero if its position is + * offscreen. Animations should always run but as they are also + * run off the repaint cycle, if there's nothing to repaint + * the animation stops running. Therefore if we catch this situation + * and schedule a repaint on all outputs it will be avoided. + */ + if (animation->view->output_mask == 0) + weston_compositor_schedule_repaint(compositor); } static struct weston_view_animation * diff --git a/src/spring-tool.c b/src/spring-tool.c index 41cc52c..685bfd9 100644 --- a/src/spring-tool.c +++ b/src/spring-tool.c @@ -40,6 +40,11 @@ weston_view_schedule_repaint(struct weston_view *view) { } +WL_EXPORT void +weston_compositor_schedule_repaint(struct weston_compositor *compositor) +{ +} + int main(int argc, char *argv[]) { -- 2.7.4