mirror of
https://github.com/gnif/LookingGlass.git
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128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/**
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* Looking Glass
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* Copyright © 2017-2024 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define _GNU_SOURCE
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#include "wayland.h"
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#include <stdbool.h>
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#include <string.h>
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#include <errno.h>
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#include <wayland-client.h>
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#include "common/debug.h"
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#include "common/time.h"
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struct FrameData
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{
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struct timespec sent;
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};
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static void presentationClockId(void * data,
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struct wp_presentation * presentation, uint32_t clkId)
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{
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wlWm.clkId = clkId;
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}
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static const struct wp_presentation_listener presentationListener = {
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.clock_id = presentationClockId,
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};
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static void presentationFeedbackSyncOutput(void * data,
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struct wp_presentation_feedback * feedback, struct wl_output * output)
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{
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// Do nothing.
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}
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static void presentationFeedbackPresented(void * opaque,
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struct wp_presentation_feedback * feedback, uint32_t tvSecHi, uint32_t tvSecLo,
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uint32_t tvNsec, uint32_t refresh, uint32_t seqHi, uint32_t seqLo, uint32_t flags)
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{
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struct FrameData * data = opaque;
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struct timespec present = {
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.tv_sec = (uint64_t) tvSecHi << 32 | tvSecLo,
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.tv_nsec = tvNsec,
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};
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struct timespec delta;
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tsDiff(&delta, &present, &data->sent);
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ringbuffer_push(wlWm.photonTimings, &(float){ delta.tv_sec + delta.tv_nsec * 1e-6f });
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free(data);
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wp_presentation_feedback_destroy(feedback);
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}
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static void presentationFeedbackDiscarded(void * data,
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struct wp_presentation_feedback * feedback)
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{
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free(data);
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wp_presentation_feedback_destroy(feedback);
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}
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static const struct wp_presentation_feedback_listener presentationFeedbackListener = {
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.sync_output = presentationFeedbackSyncOutput,
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.presented = presentationFeedbackPresented,
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.discarded = presentationFeedbackDiscarded,
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};
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bool waylandPresentationInit(void)
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{
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if (wlWm.presentation)
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{
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wlWm.photonTimings = ringbuffer_new(256, sizeof(float));
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wlWm.photonGraph = app_registerGraph("PHOTON", wlWm.photonTimings,
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0.0f, 30.0f, NULL);
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wp_presentation_add_listener(wlWm.presentation, &presentationListener, NULL);
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}
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return true;
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}
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void waylandPresentationFree(void)
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{
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if (!wlWm.presentation)
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return;
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wp_presentation_destroy(wlWm.presentation);
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app_unregisterGraph(wlWm.photonGraph);
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ringbuffer_free(&wlWm.photonTimings);
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}
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void waylandPresentationFrame(void)
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{
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if (!wlWm.presentation)
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return;
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struct FrameData * data = malloc(sizeof(*data));
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if (!data)
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{
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DEBUG_ERROR("out of memory");
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return;
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}
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if (clock_gettime(wlWm.clkId, &data->sent))
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{
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DEBUG_ERROR("clock_gettime failed: %s\n", strerror(errno));
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free(data);
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return;
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}
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struct wp_presentation_feedback * feedback = wp_presentation_feedback(wlWm.presentation, wlWm.surface);
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wp_presentation_feedback_add_listener(feedback, &presentationFeedbackListener, data);
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}
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