142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
#include <assert.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <wlr/interfaces/wlr_output.h>
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#include <wlr/util/log.h>
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#include "backend/headless.h"
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#include "util/signal.h"
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static const uint32_t SUPPORTED_OUTPUT_STATE =
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WLR_OUTPUT_STATE_BACKEND_OPTIONAL |
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WLR_OUTPUT_STATE_BUFFER |
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WLR_OUTPUT_STATE_MODE;
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static struct wlr_headless_output *headless_output_from_output(
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struct wlr_output *wlr_output) {
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assert(wlr_output_is_headless(wlr_output));
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return (struct wlr_headless_output *)wlr_output;
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}
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static bool output_set_custom_mode(struct wlr_headless_output *output,
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int32_t width, int32_t height, int32_t refresh) {
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if (refresh <= 0) {
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refresh = HEADLESS_DEFAULT_REFRESH;
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}
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output->frame_delay = 1000000 / refresh;
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wlr_output_update_custom_mode(&output->wlr_output, width, height, refresh);
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return true;
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}
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static bool output_test(struct wlr_output *wlr_output) {
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uint32_t unsupported =
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wlr_output->pending.committed & ~SUPPORTED_OUTPUT_STATE;
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if (unsupported != 0) {
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wlr_log(WLR_DEBUG, "Unsupported output state fields: 0x%"PRIx32,
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unsupported);
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return false;
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}
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if (wlr_output->pending.committed & WLR_OUTPUT_STATE_MODE) {
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assert(wlr_output->pending.mode_type == WLR_OUTPUT_STATE_MODE_CUSTOM);
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}
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return true;
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}
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static bool output_commit(struct wlr_output *wlr_output) {
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struct wlr_headless_output *output =
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headless_output_from_output(wlr_output);
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if (!output_test(wlr_output)) {
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return false;
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}
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if (wlr_output->pending.committed & WLR_OUTPUT_STATE_MODE) {
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if (!output_set_custom_mode(output,
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wlr_output->pending.custom_mode.width,
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wlr_output->pending.custom_mode.height,
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wlr_output->pending.custom_mode.refresh)) {
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return false;
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}
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}
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if (wlr_output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
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struct wlr_output_event_present present_event = {
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.commit_seq = wlr_output->commit_seq + 1,
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.presented = true,
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};
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wlr_output_send_present(wlr_output, &present_event);
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}
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return true;
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}
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static void output_destroy(struct wlr_output *wlr_output) {
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struct wlr_headless_output *output =
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headless_output_from_output(wlr_output);
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wl_list_remove(&output->link);
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wl_event_source_remove(output->frame_timer);
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free(output);
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}
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static const struct wlr_output_impl output_impl = {
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.destroy = output_destroy,
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.commit = output_commit,
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};
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bool wlr_output_is_headless(struct wlr_output *wlr_output) {
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return wlr_output->impl == &output_impl;
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}
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static int signal_frame(void *data) {
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struct wlr_headless_output *output = data;
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wlr_output_send_frame(&output->wlr_output);
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wl_event_source_timer_update(output->frame_timer, output->frame_delay);
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return 0;
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}
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struct wlr_output *wlr_headless_add_output(struct wlr_backend *wlr_backend,
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unsigned int width, unsigned int height) {
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struct wlr_headless_backend *backend =
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headless_backend_from_backend(wlr_backend);
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struct wlr_headless_output *output =
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calloc(1, sizeof(struct wlr_headless_output));
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if (output == NULL) {
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wlr_log(WLR_ERROR, "Failed to allocate wlr_headless_output");
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return NULL;
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}
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output->backend = backend;
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wlr_output_init(&output->wlr_output, &backend->backend, &output_impl,
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backend->display);
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struct wlr_output *wlr_output = &output->wlr_output;
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output_set_custom_mode(output, width, height, 0);
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strncpy(wlr_output->make, "headless", sizeof(wlr_output->make));
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strncpy(wlr_output->model, "headless", sizeof(wlr_output->model));
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char name[64];
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snprintf(name, sizeof(name), "HEADLESS-%zu", ++backend->last_output_num);
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wlr_output_set_name(wlr_output, name);
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char description[128];
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snprintf(description, sizeof(description),
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"Headless output %zu", backend->last_output_num);
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wlr_output_set_description(wlr_output, description);
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struct wl_event_loop *ev = wl_display_get_event_loop(backend->display);
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output->frame_timer = wl_event_loop_add_timer(ev, signal_frame, output);
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wl_list_insert(&backend->outputs, &output->link);
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if (backend->started) {
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wl_event_source_timer_update(output->frame_timer, output->frame_delay);
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wlr_output_update_enabled(wlr_output, true);
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wlr_signal_emit_safe(&backend->backend.events.new_output, wlr_output);
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}
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return wlr_output;
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}
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