wlroots/backend/wayland/output.c

738 lines
22 KiB
C

#include <assert.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <unistd.h>
#include <drm_fourcc.h>
#include <wayland-client.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/util/log.h>
#include "backend/backend.h"
#include "backend/wayland.h"
#include "render/pixel_format.h"
#include "render/swapchain.h"
#include "render/wlr_renderer.h"
#include "util/signal.h"
#include "linux-dmabuf-unstable-v1-client-protocol.h"
#include "presentation-time-client-protocol.h"
#include "xdg-decoration-unstable-v1-client-protocol.h"
#include "xdg-shell-client-protocol.h"
static struct wlr_wl_output *get_wl_output_from_output(
struct wlr_output *wlr_output) {
assert(wlr_output_is_wl(wlr_output));
return (struct wlr_wl_output *)wlr_output;
}
static void surface_frame_callback(void *data, struct wl_callback *cb,
uint32_t time) {
struct wlr_wl_output *output = data;
assert(output);
wl_callback_destroy(cb);
output->frame_callback = NULL;
wlr_output_send_frame(&output->wlr_output);
}
static const struct wl_callback_listener frame_listener = {
.done = surface_frame_callback
};
static void presentation_feedback_destroy(
struct wlr_wl_presentation_feedback *feedback) {
wl_list_remove(&feedback->link);
wp_presentation_feedback_destroy(feedback->feedback);
free(feedback);
}
static void presentation_feedback_handle_sync_output(void *data,
struct wp_presentation_feedback *feedback, struct wl_output *output) {
// This space is intentionally left blank
}
static void presentation_feedback_handle_presented(void *data,
struct wp_presentation_feedback *wp_feedback, uint32_t tv_sec_hi,
uint32_t tv_sec_lo, uint32_t tv_nsec, uint32_t refresh_ns,
uint32_t seq_hi, uint32_t seq_lo, uint32_t flags) {
struct wlr_wl_presentation_feedback *feedback = data;
struct timespec t = {
.tv_sec = ((uint64_t)tv_sec_hi << 32) | tv_sec_lo,
.tv_nsec = tv_nsec,
};
struct wlr_output_event_present event = {
.commit_seq = feedback->commit_seq,
.when = &t,
.seq = ((uint64_t)seq_hi << 32) | seq_lo,
.refresh = refresh_ns,
.flags = flags,
};
wlr_output_send_present(&feedback->output->wlr_output, &event);
presentation_feedback_destroy(feedback);
}
static void presentation_feedback_handle_discarded(void *data,
struct wp_presentation_feedback *wp_feedback) {
struct wlr_wl_presentation_feedback *feedback = data;
wlr_output_send_present(&feedback->output->wlr_output, NULL);
presentation_feedback_destroy(feedback);
}
static const struct wp_presentation_feedback_listener
presentation_feedback_listener = {
.sync_output = presentation_feedback_handle_sync_output,
.presented = presentation_feedback_handle_presented,
.discarded = presentation_feedback_handle_discarded,
};
static bool output_set_custom_mode(struct wlr_output *wlr_output,
int32_t width, int32_t height, int32_t refresh) {
struct wlr_wl_output *output = get_wl_output_from_output(wlr_output);
struct wlr_allocator *allocator = backend_get_allocator(wlr_output->backend);
if (wlr_output->width != width || wlr_output->height != height) {
struct wlr_swapchain *swapchain = wlr_swapchain_create(allocator,
width, height, output->backend->format);
if (swapchain == NULL) {
return false;
}
wlr_swapchain_destroy(output->swapchain);
output->swapchain = swapchain;
}
wlr_output_update_custom_mode(&output->wlr_output, width, height, 0);
return true;
}
static bool output_attach_render(struct wlr_output *wlr_output,
int *buffer_age) {
struct wlr_wl_output *output = get_wl_output_from_output(wlr_output);
struct wlr_renderer *renderer = wlr_backend_get_renderer(wlr_output->backend);
wlr_buffer_unlock(output->back_buffer);
output->back_buffer = wlr_swapchain_acquire(output->swapchain, buffer_age);
if (!output->back_buffer) {
wlr_log(WLR_ERROR, "Failed to acquire swapchain buffer");
return false;
}
if (!wlr_renderer_bind_buffer(renderer, output->back_buffer)) {
wlr_log(WLR_ERROR, "Failed to bind buffer to renderer");
return false;
}
return true;
}
void destroy_wl_buffer(struct wlr_wl_buffer *buffer) {
if (buffer == NULL) {
return;
}
wl_list_remove(&buffer->buffer_destroy.link);
wl_list_remove(&buffer->link);
wl_buffer_destroy(buffer->wl_buffer);
free(buffer);
}
static void buffer_handle_release(void *data, struct wl_buffer *wl_buffer) {
struct wlr_wl_buffer *buffer = data;
buffer->released = true;
wlr_buffer_unlock(buffer->buffer); // might free buffer
}
static const struct wl_buffer_listener buffer_listener = {
.release = buffer_handle_release,
};
static void buffer_handle_buffer_destroy(struct wl_listener *listener,
void *data) {
struct wlr_wl_buffer *buffer =
wl_container_of(listener, buffer, buffer_destroy);
destroy_wl_buffer(buffer);
}
static bool test_buffer(struct wlr_wl_backend *wl,
struct wlr_buffer *wlr_buffer) {
struct wlr_dmabuf_attributes dmabuf;
struct wlr_shm_attributes shm;
if (wlr_buffer_get_dmabuf(wlr_buffer, &dmabuf)) {
return wlr_drm_format_set_has(&wl->linux_dmabuf_v1_formats,
dmabuf.format, dmabuf.modifier);
} else if (wlr_buffer_get_shm(wlr_buffer, &shm)) {
return wlr_drm_format_set_has(&wl->shm_formats, shm.format,
DRM_FORMAT_MOD_INVALID);
} else {
return false;
}
}
static struct wl_buffer *import_dmabuf(struct wlr_wl_backend *wl,
struct wlr_dmabuf_attributes *dmabuf) {
uint32_t modifier_hi = dmabuf->modifier >> 32;
uint32_t modifier_lo = (uint32_t)dmabuf->modifier;
struct zwp_linux_buffer_params_v1 *params =
zwp_linux_dmabuf_v1_create_params(wl->zwp_linux_dmabuf_v1);
for (int i = 0; i < dmabuf->n_planes; i++) {
zwp_linux_buffer_params_v1_add(params, dmabuf->fd[i], i,
dmabuf->offset[i], dmabuf->stride[i], modifier_hi, modifier_lo);
}
uint32_t flags = 0;
if (dmabuf->flags & WLR_DMABUF_ATTRIBUTES_FLAGS_Y_INVERT) {
flags |= ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_Y_INVERT;
}
if (dmabuf->flags & WLR_DMABUF_ATTRIBUTES_FLAGS_INTERLACED) {
flags |= ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_INTERLACED;
}
if (dmabuf->flags & WLR_DMABUF_ATTRIBUTES_FLAGS_BOTTOM_FIRST) {
flags |= ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_BOTTOM_FIRST;
}
struct wl_buffer *wl_buffer = zwp_linux_buffer_params_v1_create_immed(
params, dmabuf->width, dmabuf->height, dmabuf->format, flags);
// TODO: handle create() errors
return wl_buffer;
}
static struct wl_buffer *import_shm(struct wlr_wl_backend *wl,
struct wlr_shm_attributes *shm) {
enum wl_shm_format wl_shm_format = convert_drm_format_to_wl_shm(shm->format);
uint32_t size = shm->stride * shm->height;
struct wl_shm_pool *pool = wl_shm_create_pool(wl->shm, shm->fd, size);
if (pool == NULL) {
return NULL;
}
struct wl_buffer *wl_buffer = wl_shm_pool_create_buffer(pool, shm->offset,
shm->width, shm->height, shm->stride, wl_shm_format);
wl_shm_pool_destroy(pool);
return wl_buffer;
}
static struct wlr_wl_buffer *create_wl_buffer(struct wlr_wl_backend *wl,
struct wlr_buffer *wlr_buffer) {
if (!test_buffer(wl, wlr_buffer)) {
return NULL;
}
struct wlr_dmabuf_attributes dmabuf;
struct wlr_shm_attributes shm;
struct wl_buffer *wl_buffer;
if (wlr_buffer_get_dmabuf(wlr_buffer, &dmabuf)) {
wl_buffer = import_dmabuf(wl, &dmabuf);
} else if (wlr_buffer_get_shm(wlr_buffer, &shm)) {
wl_buffer = import_shm(wl, &shm);
} else {
return NULL;
}
if (wl_buffer == NULL) {
return NULL;
}
struct wlr_wl_buffer *buffer = calloc(1, sizeof(struct wlr_wl_buffer));
if (buffer == NULL) {
wl_buffer_destroy(wl_buffer);
return NULL;
}
buffer->wl_buffer = wl_buffer;
buffer->buffer = wlr_buffer_lock(wlr_buffer);
wl_list_insert(&wl->buffers, &buffer->link);
wl_buffer_add_listener(wl_buffer, &buffer_listener, buffer);
buffer->buffer_destroy.notify = buffer_handle_buffer_destroy;
wl_signal_add(&wlr_buffer->events.destroy, &buffer->buffer_destroy);
return buffer;
}
static struct wlr_wl_buffer *get_or_create_wl_buffer(struct wlr_wl_backend *wl,
struct wlr_buffer *wlr_buffer) {
struct wlr_wl_buffer *buffer;
wl_list_for_each(buffer, &wl->buffers, link) {
// We can only re-use a wlr_wl_buffer if the parent compositor has
// released it, because wl_buffer.release is per-wl_buffer, not per
// wl_surface.commit.
if (buffer->buffer == wlr_buffer && buffer->released) {
buffer->released = false;
wlr_buffer_lock(buffer->buffer);
return buffer;
}
}
return create_wl_buffer(wl, wlr_buffer);
}
static bool output_test(struct wlr_output *wlr_output) {
struct wlr_wl_output *output =
get_wl_output_from_output(wlr_output);
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_ENABLED) {
wlr_log(WLR_DEBUG, "Cannot disable a Wayland output");
return false;
}
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_MODE) {
assert(wlr_output->pending.mode_type == WLR_OUTPUT_STATE_MODE_CUSTOM);
}
if ((wlr_output->pending.committed & WLR_OUTPUT_STATE_BUFFER) &&
wlr_output->pending.buffer_type == WLR_OUTPUT_STATE_BUFFER_SCANOUT &&
!test_buffer(output->backend, wlr_output->pending.buffer)) {
return false;
}
return true;
}
static bool output_commit(struct wlr_output *wlr_output) {
struct wlr_wl_output *output =
get_wl_output_from_output(wlr_output);
struct wlr_renderer *renderer = wlr_backend_get_renderer(wlr_output->backend);
if (!output_test(wlr_output)) {
return false;
}
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_MODE) {
if (!output_set_custom_mode(wlr_output,
wlr_output->pending.custom_mode.width,
wlr_output->pending.custom_mode.height,
wlr_output->pending.custom_mode.refresh)) {
return false;
}
}
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
struct wp_presentation_feedback *wp_feedback = NULL;
if (output->backend->presentation != NULL) {
wp_feedback = wp_presentation_feedback(output->backend->presentation,
output->surface);
}
pixman_region32_t *damage = NULL;
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_DAMAGE) {
damage = &wlr_output->pending.damage;
}
if (output->frame_callback != NULL) {
wlr_log(WLR_ERROR, "Skipping buffer swap");
return false;
}
output->frame_callback = wl_surface_frame(output->surface);
wl_callback_add_listener(output->frame_callback, &frame_listener, output);
struct wlr_buffer *wlr_buffer = NULL;
switch (wlr_output->pending.buffer_type) {
case WLR_OUTPUT_STATE_BUFFER_RENDER:
assert(output->back_buffer != NULL);
wlr_buffer = output->back_buffer;
wlr_renderer_bind_buffer(renderer, NULL);
break;
case WLR_OUTPUT_STATE_BUFFER_SCANOUT:;
wlr_buffer = wlr_output->pending.buffer;
break;
}
struct wlr_wl_buffer *buffer =
get_or_create_wl_buffer(output->backend, wlr_buffer);
if (buffer == NULL) {
return false;
}
wl_surface_attach(output->surface, buffer->wl_buffer, 0, 0);
if (damage == NULL) {
wl_surface_damage_buffer(output->surface,
0, 0, INT32_MAX, INT32_MAX);
} else {
int rects_len;
pixman_box32_t *rects =
pixman_region32_rectangles(damage, &rects_len);
for (int i = 0; i < rects_len; i++) {
pixman_box32_t *r = &rects[i];
wl_surface_damage_buffer(output->surface, r->x1, r->y1,
r->x2 - r->x1, r->y2 - r->y1);
}
}
wl_surface_commit(output->surface);
wlr_buffer_unlock(output->back_buffer);
output->back_buffer = NULL;
wlr_swapchain_set_buffer_submitted(output->swapchain, wlr_buffer);
if (wp_feedback != NULL) {
struct wlr_wl_presentation_feedback *feedback =
calloc(1, sizeof(*feedback));
if (feedback == NULL) {
wp_presentation_feedback_destroy(wp_feedback);
return false;
}
feedback->output = output;
feedback->feedback = wp_feedback;
feedback->commit_seq = output->wlr_output.commit_seq + 1;
wl_list_insert(&output->presentation_feedbacks, &feedback->link);
wp_presentation_feedback_add_listener(wp_feedback,
&presentation_feedback_listener, feedback);
} else {
wlr_output_send_present(wlr_output, NULL);
}
}
wl_display_flush(output->backend->remote_display);
return true;
}
static void output_rollback_render(struct wlr_output *wlr_output) {
struct wlr_renderer *renderer = wlr_backend_get_renderer(wlr_output->backend);
wlr_renderer_bind_buffer(renderer, NULL);
}
static bool output_set_cursor(struct wlr_output *wlr_output,
struct wlr_texture *texture, float scale,
enum wl_output_transform transform,
int32_t hotspot_x, int32_t hotspot_y, bool update_texture) {
struct wlr_wl_output *output = get_wl_output_from_output(wlr_output);
struct wlr_wl_backend *backend = output->backend;
struct wlr_renderer *renderer = wlr_backend_get_renderer(&backend->backend);
struct wlr_allocator *allocator = backend_get_allocator(&backend->backend);
struct wlr_box hotspot = { .x = hotspot_x, .y = hotspot_y };
wlr_box_transform(&hotspot, &hotspot,
wlr_output_transform_invert(wlr_output->transform),
output->cursor.width, output->cursor.height);
// TODO: use output->wlr_output.transform to transform pixels and hotpot
output->cursor.hotspot_x = hotspot.x;
output->cursor.hotspot_y = hotspot.y;
if (!update_texture) {
// Update hotspot without changing cursor image
update_wl_output_cursor(output);
return true;
}
if (output->cursor.surface == NULL) {
output->cursor.surface =
wl_compositor_create_surface(backend->compositor);
}
struct wl_surface *surface = output->cursor.surface;
if (texture != NULL) {
int width = texture->width * wlr_output->scale / scale;
int height = texture->height * wlr_output->scale / scale;
if (output->cursor.swapchain == NULL ||
output->cursor.swapchain->width != width ||
output->cursor.swapchain->height != height) {
wlr_swapchain_destroy(output->cursor.swapchain);
output->cursor.swapchain = wlr_swapchain_create(allocator,
width, height, output->backend->format);
if (output->cursor.swapchain == NULL) {
return false;
}
}
struct wlr_buffer *wlr_buffer =
wlr_swapchain_acquire(output->cursor.swapchain, NULL);
if (wlr_buffer == NULL) {
return false;
}
if (!wlr_renderer_bind_buffer(renderer, wlr_buffer)) {
return false;
}
struct wlr_box cursor_box = {
.width = width,
.height = height,
};
float output_matrix[9];
wlr_matrix_identity(output_matrix);
if (wlr_output->transform != WL_OUTPUT_TRANSFORM_NORMAL) {
struct wlr_box tr_size = { .width = width, .height = height };
wlr_box_transform(&tr_size, &tr_size, wlr_output->transform, 0, 0);
wlr_matrix_translate(output_matrix, width / 2.0, height / 2.0);
wlr_matrix_transform(output_matrix, wlr_output->transform);
wlr_matrix_translate(output_matrix,
- tr_size.width / 2.0, - tr_size.height / 2.0);
}
float matrix[9];
wlr_matrix_project_box(matrix, &cursor_box, transform, 0, output_matrix);
wlr_renderer_begin(renderer, width, height);
wlr_renderer_clear(renderer, (float[]){ 0.0, 0.0, 0.0, 0.0 });
wlr_render_texture_with_matrix(renderer, texture, matrix, 1.0);
wlr_renderer_end(renderer);
wlr_renderer_bind_buffer(renderer, NULL);
struct wlr_wl_buffer *buffer =
get_or_create_wl_buffer(output->backend, wlr_buffer);
if (buffer == NULL) {
return false;
}
wl_surface_attach(surface, buffer->wl_buffer, 0, 0);
wl_surface_damage_buffer(surface, 0, 0, INT32_MAX, INT32_MAX);
wl_surface_commit(surface);
wlr_buffer_unlock(wlr_buffer);
output->cursor.width = width;
output->cursor.height = height;
} else {
wl_surface_attach(surface, NULL, 0, 0);
wl_surface_commit(surface);
}
update_wl_output_cursor(output);
wl_display_flush(backend->remote_display);
return true;
}
static void output_destroy(struct wlr_output *wlr_output) {
struct wlr_wl_output *output = get_wl_output_from_output(wlr_output);
if (output == NULL) {
return;
}
wl_list_remove(&output->link);
wlr_swapchain_destroy(output->cursor.swapchain);
if (output->cursor.surface) {
wl_surface_destroy(output->cursor.surface);
}
if (output->frame_callback) {
wl_callback_destroy(output->frame_callback);
}
struct wlr_wl_presentation_feedback *feedback, *feedback_tmp;
wl_list_for_each_safe(feedback, feedback_tmp,
&output->presentation_feedbacks, link) {
presentation_feedback_destroy(feedback);
}
wlr_buffer_unlock(output->back_buffer);
wlr_swapchain_destroy(output->swapchain);
if (output->zxdg_toplevel_decoration_v1) {
zxdg_toplevel_decoration_v1_destroy(output->zxdg_toplevel_decoration_v1);
}
xdg_toplevel_destroy(output->xdg_toplevel);
xdg_surface_destroy(output->xdg_surface);
wl_surface_destroy(output->surface);
wl_display_flush(output->backend->remote_display);
free(output);
}
void update_wl_output_cursor(struct wlr_wl_output *output) {
struct wlr_wl_pointer *pointer = output->cursor.pointer;
if (pointer) {
assert(pointer->output == output);
assert(output->enter_serial);
wl_pointer_set_cursor(pointer->wl_pointer, output->enter_serial,
output->cursor.surface, output->cursor.hotspot_x,
output->cursor.hotspot_y);
}
}
static bool output_move_cursor(struct wlr_output *_output, int x, int y) {
// TODO: only return true if x == current x and y == current y
return true;
}
static const struct wlr_output_impl output_impl = {
.destroy = output_destroy,
.attach_render = output_attach_render,
.test = output_test,
.commit = output_commit,
.rollback_render = output_rollback_render,
.set_cursor = output_set_cursor,
.move_cursor = output_move_cursor,
};
bool wlr_output_is_wl(struct wlr_output *wlr_output) {
return wlr_output->impl == &output_impl;
}
static void xdg_surface_handle_configure(void *data,
struct xdg_surface *xdg_surface, uint32_t serial) {
struct wlr_wl_output *output = data;
assert(output && output->xdg_surface == xdg_surface);
xdg_surface_ack_configure(xdg_surface, serial);
// nothing else?
}
static const struct xdg_surface_listener xdg_surface_listener = {
.configure = xdg_surface_handle_configure,
};
static void xdg_toplevel_handle_configure(void *data,
struct xdg_toplevel *xdg_toplevel,
int32_t width, int32_t height, struct wl_array *states) {
struct wlr_wl_output *output = data;
assert(output && output->xdg_toplevel == xdg_toplevel);
if (width == 0 || height == 0) {
return;
}
// loop over states for maximized etc?
output_set_custom_mode(&output->wlr_output, width, height, 0);
}
static void xdg_toplevel_handle_close(void *data,
struct xdg_toplevel *xdg_toplevel) {
struct wlr_wl_output *output = data;
assert(output && output->xdg_toplevel == xdg_toplevel);
wlr_output_destroy(&output->wlr_output);
}
static const struct xdg_toplevel_listener xdg_toplevel_listener = {
.configure = xdg_toplevel_handle_configure,
.close = xdg_toplevel_handle_close,
};
struct wlr_output *wlr_wl_output_create(struct wlr_backend *wlr_backend) {
struct wlr_wl_backend *backend = get_wl_backend_from_backend(wlr_backend);
if (!backend->started) {
++backend->requested_outputs;
return NULL;
}
struct wlr_wl_output *output;
if (!(output = calloc(sizeof(struct wlr_wl_output), 1))) {
wlr_log(WLR_ERROR, "Failed to allocate wlr_wl_output");
return NULL;
}
wlr_output_init(&output->wlr_output, &backend->backend, &output_impl,
backend->local_display);
struct wlr_output *wlr_output = &output->wlr_output;
wlr_output_update_custom_mode(wlr_output, 1280, 720, 0);
strncpy(wlr_output->make, "wayland", sizeof(wlr_output->make));
strncpy(wlr_output->model, "wayland", sizeof(wlr_output->model));
snprintf(wlr_output->name, sizeof(wlr_output->name), "WL-%zd",
++backend->last_output_num);
char description[128];
snprintf(description, sizeof(description),
"Wayland output %zd", backend->last_output_num);
wlr_output_set_description(wlr_output, description);
output->backend = backend;
wl_list_init(&output->presentation_feedbacks);
output->surface = wl_compositor_create_surface(backend->compositor);
if (!output->surface) {
wlr_log_errno(WLR_ERROR, "Could not create output surface");
goto error;
}
wl_surface_set_user_data(output->surface, output);
output->xdg_surface =
xdg_wm_base_get_xdg_surface(backend->xdg_wm_base, output->surface);
if (!output->xdg_surface) {
wlr_log_errno(WLR_ERROR, "Could not get xdg surface");
goto error;
}
output->xdg_toplevel =
xdg_surface_get_toplevel(output->xdg_surface);
if (!output->xdg_toplevel) {
wlr_log_errno(WLR_ERROR, "Could not get xdg toplevel");
goto error;
}
if (backend->zxdg_decoration_manager_v1) {
output->zxdg_toplevel_decoration_v1 =
zxdg_decoration_manager_v1_get_toplevel_decoration(
backend->zxdg_decoration_manager_v1, output->xdg_toplevel);
if (!output->zxdg_toplevel_decoration_v1) {
wlr_log_errno(WLR_ERROR, "Could not get xdg toplevel decoration");
goto error;
}
zxdg_toplevel_decoration_v1_set_mode(output->zxdg_toplevel_decoration_v1,
ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE);
}
wlr_wl_output_set_title(wlr_output, NULL);
xdg_toplevel_set_app_id(output->xdg_toplevel, "wlroots");
xdg_surface_add_listener(output->xdg_surface,
&xdg_surface_listener, output);
xdg_toplevel_add_listener(output->xdg_toplevel,
&xdg_toplevel_listener, output);
wl_surface_commit(output->surface);
struct wlr_allocator *allocator = backend_get_allocator(&backend->backend);
output->swapchain = wlr_swapchain_create(allocator,
wlr_output->width, wlr_output->height, output->backend->format);
if (output->swapchain == NULL) {
goto error;
}
wl_display_roundtrip(output->backend->remote_display);
wl_list_insert(&backend->outputs, &output->link);
wlr_output_update_enabled(wlr_output, true);
wlr_signal_emit_safe(&backend->backend.events.new_output, wlr_output);
struct wlr_wl_seat *seat;
wl_list_for_each(seat, &backend->seats, link) {
if (seat->pointer) {
create_wl_pointer(seat, output);
}
}
// Start the rendering loop by requesting the compositor to render a frame
wlr_output_schedule_frame(wlr_output);
return wlr_output;
error:
wlr_output_destroy(&output->wlr_output);
return NULL;
}
void wlr_wl_output_set_title(struct wlr_output *output, const char *title) {
struct wlr_wl_output *wl_output = get_wl_output_from_output(output);
char wl_title[32];
if (title == NULL) {
if (snprintf(wl_title, sizeof(wl_title), "wlroots - %s", output->name) <= 0) {
return;
}
title = wl_title;
}
xdg_toplevel_set_title(wl_output->xdg_toplevel, title);
wl_display_flush(wl_output->backend->remote_display);
}
struct wl_surface *wlr_wl_output_get_surface(struct wlr_output *output) {
struct wlr_wl_output *wl_output = get_wl_output_from_output(output);
return wl_output->surface;
}