f8bfd0581b
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.
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/*
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* Copyright © 2011 Intel Corporation
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of the copyright holders not be used in
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* advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. The copyright holders make
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "config.h"
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#include "compositor.h"
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WL_EXPORT void
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weston_view_geometry_dirty(struct weston_view *view)
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{
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}
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WL_EXPORT int
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weston_log(const char *fmt, ...)
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{
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return 0;
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}
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WL_EXPORT void
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weston_view_schedule_repaint(struct weston_view *view)
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{
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}
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WL_EXPORT void
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weston_compositor_schedule_repaint(struct weston_compositor *compositor)
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{
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}
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int
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main(int argc, char *argv[])
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{
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const double k = 300.0;
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const double current = 0.5;
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const double target = 1.0;
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const double friction = 1400;
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struct weston_spring spring;
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uint32_t time = 0;
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weston_spring_init(&spring, k, current, target);
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spring.friction = friction;
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spring.previous = 0.48;
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spring.timestamp = 0;
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while (!weston_spring_done(&spring)) {
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printf("\t%d\t%f\n", time, spring.current);
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weston_spring_update(&spring, time);
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time += 16;
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}
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return 0;
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}
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