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backend/x11: send more precise output present events 

Instead of sending dummy output present events, use the X11 Present
extension to send more precise events.
This commit is contained in:
Simon Ser 2020-12-13 12:54:05 +01:00
parent f0c1b32120
commit 0aefa18690
1 changed files with 33 additions and 5 deletions
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38
backend/x11/output.c
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@ -19,6 +19,7 @@
#include "render/swapchain.h"
#include "render/wlr_renderer.h"
#include "util/signal.h"
#include "util/time.h"
static int signal_frame(void *data) {
struct wlr_x11_output *output = data;
@ -239,8 +240,6 @@ static bool output_commit_buffer(struct wlr_x11_output *output) {
wlr_swapchain_set_buffer_submitted(output->swapchain, x11_buffer->buffer);
wlr_output_send_present(&output->wlr_output, NULL);
return true;
error:
@ -379,7 +378,8 @@ struct wlr_output *wlr_x11_output_create(struct wlr_backend *backend) {
};
xcb_input_xi_select_events(x11->xcb, output->win, 1, &xinput_mask.head);
uint32_t present_mask = XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY;
uint32_t present_mask = XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY |
XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY;
xcb_present_select_input(x11->xcb, x11->present_event_id, output->win,
present_mask);
@ -482,13 +482,14 @@ static struct wlr_x11_buffer *get_x11_buffer(struct wlr_x11_output *output,
void handle_x11_present_event(struct wlr_x11_backend *x11,
xcb_ge_generic_event_t *event) {
struct wlr_x11_output *output;
switch (event->event_type) {
case XCB_PRESENT_EVENT_IDLE_NOTIFY:;
xcb_present_idle_notify_event_t *idle_notify =
(xcb_present_idle_notify_event_t *)event;
struct wlr_x11_output *output =
get_x11_output_from_window_id(x11, idle_notify->window);
output = get_x11_output_from_window_id(x11, idle_notify->window);
if (!output) {
wlr_log(WLR_DEBUG, "Got PresentIdleNotify event for unknown window");
return;
@ -503,6 +504,33 @@ void handle_x11_present_event(struct wlr_x11_backend *x11,
destroy_x11_buffer(buffer);
break;
case XCB_PRESENT_COMPLETE_NOTIFY:;
xcb_present_complete_notify_event_t *complete_notify =
(xcb_present_complete_notify_event_t *)event;
output = get_x11_output_from_window_id(x11, complete_notify->window);
if (!output) {
wlr_log(WLR_DEBUG, "Got PresentCompleteNotify event for unknown window");
return;
}
struct timespec t;
timespec_from_nsec(&t, complete_notify->ust * 1000);
uint32_t flags = 0;
if (complete_notify->mode == XCB_PRESENT_COMPLETE_MODE_FLIP) {
flags |= WLR_OUTPUT_PRESENT_ZERO_COPY;
}
struct wlr_output_event_present present_event = {
.output = &output->wlr_output,
.commit_seq = complete_notify->serial,
.when = &t,
.seq = complete_notify->msc,
.flags = flags,
};
wlr_output_send_present(&output->wlr_output, &present_event);
break;
default:
wlr_log(WLR_DEBUG, "Unhandled Present event %"PRIu16, event->event_type);
}