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implement surface frame

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The surface frame callback lets a window know when it is a good time to show the
next frame if it is animating. In particular, this callback is used by
weston-simple-shm to throttle drawing.
This commit is contained in:
Tony Crisci 2017-08-09 15:58:41 -04:00 • committed by Drew DeVault
parent 87fe13a9fa
commit 8306f46dfb
3 changed files with 56 additions and 1 deletions
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13
examples/compositor/main.c
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@ -23,6 +23,13 @@ struct sample_state {
struct xdg_shell_state xdg_shell;
};
/*
* Convert timespec to milliseconds
*/
static inline int64_t timespec_to_msec(const struct timespec *a) {
return (int64_t)a->tv_sec * 1000 + a->tv_nsec / 1000000;
}
void handle_output_frame(struct output_state *output, struct timespec *ts) {
struct compositor_state *state = output->compositor;
struct sample_state *sample = state->data;
@ -39,6 +46,12 @@ void handle_output_frame(struct output_state *output, struct timespec *ts) {
wlr_texture_get_matrix(surface->texture, &matrix,
&wlr_output->transform_matrix, 200, 200);
wlr_render_with_matrix(sample->renderer, surface->texture, &matrix);
struct wlr_frame_callback *cb, *cnext;
wl_list_for_each_safe(cb, cnext, &surface->frame_callback_list, link) {
wl_callback_send_done(cb->resource, timespec_to_msec(ts));
wl_resource_destroy(cb->resource);
}
}
}