149 lines
4.6 KiB
C
149 lines
4.6 KiB
C
#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <stdlib.h>
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#include <wlr/interfaces/wlr_output.h>
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#include <wlr/render/wlr_renderer.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 EGLSurface egl_create_surface(struct wlr_egl *egl, unsigned int width,
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unsigned int height) {
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EGLint attribs[] = {EGL_WIDTH, width, EGL_HEIGHT, height, EGL_NONE};
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EGLSurface surf = eglCreatePbufferSurface(egl->display, egl->config, attribs);
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if (surf == EGL_NO_SURFACE) {
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wlr_log(L_ERROR, "Failed to create EGL surface: %s", egl_error());
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return EGL_NO_SURFACE;
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}
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return surf;
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}
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static bool output_set_custom_mode(struct wlr_output *wlr_output, int32_t width,
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int32_t height, int32_t refresh) {
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struct wlr_headless_output *output =
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(struct wlr_headless_output *)wlr_output;
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struct wlr_headless_backend *backend = output->backend;
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if (output->egl_surface) {
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eglDestroySurface(backend->egl.display, output->egl_surface);
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}
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output->egl_surface = egl_create_surface(&backend->egl, width, height);
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if (output->egl_surface == EGL_NO_SURFACE) {
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wlr_log(L_ERROR, "Failed to recreate EGL surface");
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wlr_output_destroy(wlr_output);
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return false;
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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 void output_transform(struct wlr_output *wlr_output,
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enum wl_output_transform transform) {
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struct wlr_headless_output *output =
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(struct wlr_headless_output *)wlr_output;
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output->wlr_output.transform = transform;
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}
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static bool output_make_current(struct wlr_output *wlr_output, int *buffer_age) {
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struct wlr_headless_output *output =
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(struct wlr_headless_output *)wlr_output;
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return wlr_egl_make_current(&output->backend->egl, output->egl_surface,
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buffer_age);
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}
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static bool output_swap_buffers(struct wlr_output *wlr_output,
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pixman_region32_t *damage) {
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return true; // No-op
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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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(struct wlr_headless_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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eglDestroySurface(output->backend->egl.display, output->egl_surface);
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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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.set_custom_mode = output_set_custom_mode,
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.transform = output_transform,
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.destroy = output_destroy,
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.make_current = output_make_current,
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.swap_buffers = output_swap_buffers,
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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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(struct wlr_headless_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(L_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->egl_surface = egl_create_surface(&backend->egl, width, height);
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if (output->egl_surface == EGL_NO_SURFACE) {
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wlr_log(L_ERROR, "Failed to create EGL surface");
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goto error;
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}
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output_set_custom_mode(wlr_output, width, height, 60*1000);
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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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snprintf(wlr_output->name, sizeof(wlr_output->name), "HEADLESS-%d",
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wl_list_length(&backend->outputs) + 1);
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if (!wlr_egl_make_current(&output->backend->egl, output->egl_surface,
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NULL)) {
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goto error;
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}
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wlr_renderer_begin(backend->renderer, wlr_output->width, wlr_output->height);
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wlr_renderer_clear(backend->renderer, (float[]){ 1.0, 1.0, 1.0, 1.0 });
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wlr_renderer_end(backend->renderer);
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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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error:
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wlr_output_destroy(&output->wlr_output);
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return NULL;
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}
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