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do not render frames when any surface has uncommitted changes

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This commit is contained in:
Alexander Courtis 2020-07-29 14:49:36 +10:00
parent 94bf916dae
commit 01e8b802b1
1 changed files with 32 additions and 3 deletions
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29
dwl.c
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@ -75,6 +75,7 @@ typedef struct {
struct wlr_xwayland_surface *xwayland_surface;
};
struct wl_listener activate;
struct wl_listener commit;
struct wl_listener map;
struct wl_listener unmap;
struct wl_listener destroy;
@ -84,6 +85,7 @@ typedef struct {
int bw;
unsigned int tags;
int isfloating;
int dirty;
} Client;
typedef struct {
@ -442,6 +444,15 @@ cleanupmon(struct wl_listener *listener, void *data)
free(m);
}
void
commitnotify(struct wl_listener *listener, void *data)
{
Client *c = wl_container_of(listener, c, commit);
/* client is dirty if there are any changes that have not been committed */
c->dirty = c->xdg_surface->configure_serial != c->xdg_surface->configure_next_serial;
}
void
createkeyboard(struct wlr_input_device *device)
{
@ -553,6 +564,8 @@ createnotify(struct wl_listener *listener, void *data)
WLR_EDGE_BOTTOM | WLR_EDGE_LEFT | WLR_EDGE_RIGHT);
/* Listen to the various events it can emit */
c->commit.notify = commitnotify;
wl_signal_add(&xdg_surface->surface->events.commit, &c->commit);
c->map.notify = maprequest;
wl_signal_add(&xdg_surface->events.map, &c->map);
c->unmap.notify = unmapnotify;
@ -625,6 +638,7 @@ destroynotify(struct wl_listener *listener, void *data)
{
/* Called when the surface is destroyed and should never be shown again. */
Client *c = wl_container_of(listener, c, destroy);
wl_list_remove(&c->commit.link);
wl_list_remove(&c->map.link);
wl_list_remove(&c->unmap.link);
wl_list_remove(&c->destroy.link);
@ -1218,6 +1232,8 @@ void
rendermon(struct wl_listener *listener, void *data)
{
struct wlr_output *output = data;
Client *c;
int render = 1;
/* This function is called every time an output is ready to display a frame,
* generally at the output's refresh rate (e.g. 60Hz). */
@ -1226,16 +1242,29 @@ rendermon(struct wl_listener *listener, void *data)
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
/* Do not render if clients have uncommitted changes. */
wl_list_for_each(c, &stack, slink)
{
if (c->dirty)
{
wlr_surface_send_frame_done(c->xdg_surface->surface, &now);
render = 0;
}
}
/* wlr_output_attach_render makes the OpenGL context current. */
if (!wlr_output_attach_render(m->wlr_output, NULL))
return;
/* Begin the renderer (calls glViewport and some other GL sanity checks) */
wlr_renderer_begin(drw, m->wlr_output->width, m->wlr_output->height);
if (render) {
wlr_renderer_clear(drw, rootcolor);
renderclients(m, &now);
renderindependents(output, &now);
}
/* Hardware cursors are rendered by the GPU on a separate plane, and can be
* moved around without re-rendering what's beneath them - which is more