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weston/compositor/compositor-drm.c

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/*
* Copyright © 2008-2011 Kristian Høgsberg
* Copyright © 2011 Intel Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <gbm.h>
#include "compositor.h"
struct drm_compositor {
struct wlsc_compositor base;
struct udev *udev;
struct wl_event_source *drm_source;
struct udev_monitor *udev_monitor;
struct wl_event_source *udev_drm_source;
struct {
int fd;
} drm;
struct gbm_device *gbm;
uint32_t crtc_allocator;
uint32_t connector_allocator;
struct tty *tty;
};
struct drm_mode {
struct wlsc_mode base;
drmModeModeInfo mode_info;
};
struct drm_output {
struct wlsc_output base;
uint32_t crtc_id;
uint32_t connector_id;
drmModeCrtcPtr original_crtc;
GLuint rbo[2];
uint32_t fb_id[2];
EGLImageKHR image[2];
struct gbm_bo *bo[2];
uint32_t current;
uint32_t fs_surf_fb_id;
uint32_t pending_fs_surf_fb_id;
};
static int
drm_output_prepare_render(struct wlsc_output *output_base)
{
struct drm_output *output = (struct drm_output *) output_base;
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
output->rbo[output->current]);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
return -1;
return 0;
}
static int
drm_output_present(struct wlsc_output *output_base)
{
struct drm_output *output = (struct drm_output *) output_base;
struct drm_compositor *c =
(struct drm_compositor *) output->base.compositor;
uint32_t fb_id = 0;
glFlush();
output->current ^= 1;
if (output->pending_fs_surf_fb_id != 0) {
fb_id = output->pending_fs_surf_fb_id;
} else {
fb_id = output->fb_id[output->current ^ 1];
}
drmModePageFlip(c->drm.fd, output->crtc_id,
fb_id,
DRM_MODE_PAGE_FLIP_EVENT, output);
return 0;
}
static void
page_flip_handler(int fd, unsigned int frame,
unsigned int sec, unsigned int usec, void *data)
{
struct drm_output *output = (struct drm_output *) data;
struct drm_compositor *c =
(struct drm_compositor *) output->base.compositor;
uint32_t msecs;
if (output->fs_surf_fb_id) {
drmModeRmFB(c->drm.fd, output->fs_surf_fb_id);
output->fs_surf_fb_id = 0;
}
if (output->pending_fs_surf_fb_id) {
output->fs_surf_fb_id = output->pending_fs_surf_fb_id;
output->pending_fs_surf_fb_id = 0;
}
msecs = sec * 1000 + usec / 1000;
wlsc_output_finish_frame(&output->base, msecs);
}
static int
drm_output_prepare_scanout_surface(struct wlsc_output *output_base,
struct wlsc_surface *es)
{
struct drm_output *output = (struct drm_output *) output_base;
struct drm_compositor *c =
(struct drm_compositor *) output->base.compositor;
EGLint handle, stride;
int ret;
uint32_t fb_id = 0;
struct gbm_bo *bo;
if (es->x != output->base.x ||
es->y != output->base.y ||
es->width != output->base.current->width ||
es->height != output->base.current->height ||
es->image == EGL_NO_IMAGE_KHR)
return -1;
bo = gbm_bo_create_from_egl_image(c->gbm,
c->base.display, es->image,
es->width, es->height,
GBM_BO_USE_SCANOUT);
handle = gbm_bo_get_handle(bo).s32;
stride = gbm_bo_get_pitch(bo);
gbm_bo_destroy(bo);
if (handle == 0)
return -1;
ret = drmModeAddFB(c->drm.fd,
output->base.current->width,
output->base.current->height,
24, 32, stride, handle, &fb_id);
if (ret)
return -1;
output->pending_fs_surf_fb_id = fb_id;
return 0;
}
static int
drm_output_set_cursor(struct wlsc_output *output_base,
struct wlsc_input_device *eid)
{
struct drm_output *output = (struct drm_output *) output_base;
struct drm_compositor *c =
(struct drm_compositor *) output->base.compositor;
EGLint handle, stride;
int ret = -1;
pixman_region32_t cursor_region;
struct gbm_bo *bo;
if (eid == NULL) {
drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
return 0;
}
pixman_region32_init_rect(&cursor_region,
eid->sprite->x, eid->sprite->y,
eid->sprite->width, eid->sprite->height);
pixman_region32_intersect_rect(&cursor_region, &cursor_region,
output->base.x, output->base.y,
output->base.current->width,
output->base.current->height);
if (!pixman_region32_not_empty(&cursor_region))
goto out;
if (eid->sprite->image == EGL_NO_IMAGE_KHR)
goto out;
if (eid->sprite->width > 64 || eid->sprite->height > 64)
goto out;
bo = gbm_bo_create_from_egl_image(c->gbm,
c->base.display,
eid->sprite->image, 64, 64,
GBM_BO_USE_CURSOR_64X64);
handle = gbm_bo_get_handle(bo).s32;
stride = gbm_bo_get_pitch(bo);
gbm_bo_destroy(bo);
if (stride != 64 * 4) {
fprintf(stderr, "info: cursor stride is != 64\n");
goto out;
}
ret = drmModeSetCursor(c->drm.fd, output->crtc_id, handle, 64, 64);
if (ret) {
fprintf(stderr, "failed to set cursor: %s\n", strerror(-ret));
goto out;
}
ret = drmModeMoveCursor(c->drm.fd, output->crtc_id,
eid->sprite->x - output->base.x,
eid->sprite->y - output->base.y);
if (ret) {
fprintf(stderr, "failed to move cursor: %s\n", strerror(-ret));
goto out;
}
out:
pixman_region32_fini(&cursor_region);
if (ret)
drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
return ret;
}
static void
drm_output_destroy(struct wlsc_output *output_base)
{
struct drm_output *output = (struct drm_output *) output_base;
struct drm_compositor *c =
(struct drm_compositor *) output->base.compositor;
drmModeCrtcPtr origcrtc = output->original_crtc;
int i;
/* Turn off hardware cursor */
drm_output_set_cursor(&output->base, NULL);
/* Restore original CRTC state */
drmModeSetCrtc(c->drm.fd, origcrtc->crtc_id, origcrtc->buffer_id,
origcrtc->x, origcrtc->y,
&output->connector_id, 1, &origcrtc->mode);
drmModeFreeCrtc(origcrtc);
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
0);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glDeleteRenderbuffers(2, output->rbo);
/* Destroy output buffers */
for (i = 0; i < 2; i++) {
drmModeRmFB(c->drm.fd, output->fb_id[i]);
c->base.destroy_image(c->base.display, output->image[i]);
gbm_bo_destroy(output->bo[i]);
}
c->crtc_allocator &= ~(1 << output->crtc_id);
c->connector_allocator &= ~(1 << output->connector_id);
wlsc_output_destroy(&output->base);
wl_list_remove(&output->base.link);
free(output);
}
static int
on_drm_input(int fd, uint32_t mask, void *data)
{
drmEventContext evctx;
memset(&evctx, 0, sizeof evctx);
evctx.version = DRM_EVENT_CONTEXT_VERSION;
evctx.page_flip_handler = page_flip_handler;
drmHandleEvent(fd, &evctx);
return 1;
}
static int
init_egl(struct drm_compositor *ec, struct udev_device *device)
{
EGLint major, minor;
const char *extensions, *filename;
int fd;
static const EGLint context_attribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
filename = udev_device_get_devnode(device);
fd = open(filename, O_RDWR | O_CLOEXEC);
if (fd < 0) {
/* Probably permissions error */
fprintf(stderr, "couldn't open %s, skipping\n",
udev_device_get_devnode(device));
return -1;
}
ec->drm.fd = fd;
ec->gbm = gbm_create_device(ec->drm.fd);
ec->base.display = eglGetDisplay(ec->gbm);
if (ec->base.display == NULL) {
fprintf(stderr, "failed to create display\n");
return -1;
}
if (!eglInitialize(ec->base.display, &major, &minor)) {
fprintf(stderr, "failed to initialize display\n");
return -1;
}
extensions = eglQueryString(ec->base.display, EGL_EXTENSIONS);
if (!strstr(extensions, "EGL_KHR_surfaceless_gles2")) {
fprintf(stderr, "EGL_KHR_surfaceless_gles2 not available\n");
return -1;
}
if (!eglBindAPI(EGL_OPENGL_ES_API)) {
fprintf(stderr, "failed to bind api EGL_OPENGL_ES_API\n");
return -1;
}
ec->base.context = eglCreateContext(ec->base.display, NULL,
EGL_NO_CONTEXT, context_attribs);
if (ec->base.context == NULL) {
fprintf(stderr, "failed to create context\n");
return -1;
}
if (!eglMakeCurrent(ec->base.display, EGL_NO_SURFACE,
EGL_NO_SURFACE, ec->base.context)) {
fprintf(stderr, "failed to make context current\n");
return -1;
}
return 0;
}
static drmModeModeInfo builtin_1024x768 = {
63500, /* clock */
1024, 1072, 1176, 1328, 0,
768, 771, 775, 798, 0,
59920,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
0,
"1024x768"
};
static int
drm_output_add_mode(struct drm_output *output, drmModeModeInfo *info)
{
struct drm_mode *mode;
mode = malloc(sizeof *mode);
if (mode == NULL)
return -1;
mode->base.flags = 0;
mode->base.width = info->hdisplay;
mode->base.height = info->vdisplay;
mode->base.refresh = info->vrefresh;
mode->mode_info = *info;
wl_list_insert(output->base.mode_list.prev, &mode->base.link);
return 0;
}
static int
drm_subpixel_to_wayland(int drm_value)
{
switch (drm_value) {
default:
case DRM_MODE_SUBPIXEL_UNKNOWN:
return WL_OUTPUT_SUBPIXEL_UNKNOWN;
case DRM_MODE_SUBPIXEL_NONE:
return WL_OUTPUT_SUBPIXEL_NONE;
case DRM_MODE_SUBPIXEL_HORIZONTAL_RGB:
return WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB;
case DRM_MODE_SUBPIXEL_HORIZONTAL_BGR:
return WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR;
case DRM_MODE_SUBPIXEL_VERTICAL_RGB:
return WL_OUTPUT_SUBPIXEL_VERTICAL_RGB;
case DRM_MODE_SUBPIXEL_VERTICAL_BGR:
return WL_OUTPUT_SUBPIXEL_VERTICAL_BGR;
}
}
static int
create_output_for_connector(struct drm_compositor *ec,
drmModeRes *resources,
drmModeConnector *connector,
int x, int y)
{
struct drm_output *output;
struct drm_mode *drm_mode;
drmModeEncoder *encoder;
int i, ret;
unsigned handle, stride;
encoder = drmModeGetEncoder(ec->drm.fd, connector->encoders[0]);
if (encoder == NULL) {
fprintf(stderr, "No encoder for connector.\n");
return -1;
}
for (i = 0; i < resources->count_crtcs; i++) {
if (encoder->possible_crtcs & (1 << i) &&
!(ec->crtc_allocator & (1 << resources->crtcs[i])))
break;
}
if (i == resources->count_crtcs) {
fprintf(stderr, "No usable crtc for encoder.\n");
return -1;
}
output = malloc(sizeof *output);
if (output == NULL)
return -1;
memset(output, 0, sizeof *output);
output->base.subpixel = drm_subpixel_to_wayland(connector->subpixel);
output->base.make = "unknown";
output->base.model = "unknown";
wl_list_init(&output->base.mode_list);
output->crtc_id = resources->crtcs[i];
ec->crtc_allocator |= (1 << output->crtc_id);
output->connector_id = connector->connector_id;
ec->connector_allocator |= (1 << output->connector_id);
output->original_crtc = drmModeGetCrtc(ec->drm.fd, output->crtc_id);
for (i = 0; i < connector->count_modes; i++)
drm_output_add_mode(output, &connector->modes[i]);
if (connector->count_modes == 0)
drm_output_add_mode(output, &builtin_1024x768);
drm_mode = container_of(output->base.mode_list.next,
struct drm_mode, base.link);
output->base.current = &drm_mode->base;
drm_mode->base.flags =
WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
drmModeFreeEncoder(encoder);
glGenRenderbuffers(2, output->rbo);
for (i = 0; i < 2; i++) {
glBindRenderbuffer(GL_RENDERBUFFER, output->rbo[i]);
output->bo[i] =
gbm_bo_create(ec->gbm,
output->base.current->width,
output->base.current->height,
GBM_BO_FORMAT_XRGB8888,
GBM_BO_USE_SCANOUT |
GBM_BO_USE_RENDERING);
output->image[i] = ec->base.create_image(ec->base.display,
NULL,
EGL_NATIVE_PIXMAP_KHR,
output->bo[i], NULL);
ec->base.image_target_renderbuffer_storage(GL_RENDERBUFFER,
output->image[i]);
stride = gbm_bo_get_pitch(output->bo[i]);
handle = gbm_bo_get_handle(output->bo[i]).u32;
ret = drmModeAddFB(ec->drm.fd,
output->base.current->width,
output->base.current->height,
24, 32, stride, handle, &output->fb_id[i]);
if (ret) {
fprintf(stderr, "failed to add fb %d: %m\n", i);
return -1;
}
}
output->current = 0;
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
output->rbo[output->current]);
ret = drmModeSetCrtc(ec->drm.fd, output->crtc_id,
output->fb_id[output->current ^ 1], 0, 0,
&output->connector_id, 1,
&drm_mode->mode_info);
if (ret) {
fprintf(stderr, "failed to set mode: %m\n");
return -1;
}
wlsc_output_init(&output->base, &ec->base, x, y,
connector->mmWidth, connector->mmHeight, 0);
wl_list_insert(ec->base.output_list.prev, &output->base.link);
output->pending_fs_surf_fb_id = 0;
output->base.prepare_render = drm_output_prepare_render;
output->base.present = drm_output_present;
output->base.prepare_scanout_surface =
drm_output_prepare_scanout_surface;
output->base.set_hardware_cursor = drm_output_set_cursor;
output->base.destroy = drm_output_destroy;
return 0;
}
static int
create_outputs(struct drm_compositor *ec, int option_connector)
{
drmModeConnector *connector;
drmModeRes *resources;
int i;
int x = 0, y = 0;
resources = drmModeGetResources(ec->drm.fd);
if (!resources) {
fprintf(stderr, "drmModeGetResources failed\n");
return -1;
}
for (i = 0; i < resources->count_connectors; i++) {
connector = drmModeGetConnector(ec->drm.fd,
resources->connectors[i]);
if (connector == NULL)
continue;
if (connector->connection == DRM_MODE_CONNECTED &&
(option_connector == 0 ||
connector->connector_id == option_connector)) {
if (create_output_for_connector(ec, resources,
connector, x, y) < 0) {
drmModeFreeConnector(connector);
continue;
}
x += container_of(ec->base.output_list.prev,
struct wlsc_output,
link)->current->width;
}
drmModeFreeConnector(connector);
}
if (wl_list_empty(&ec->base.output_list)) {
fprintf(stderr, "No currently active connector found.\n");
return -1;
}
drmModeFreeResources(resources);
return 0;
}
static void
update_outputs(struct drm_compositor *ec)
{
drmModeConnector *connector;
drmModeRes *resources;
struct drm_output *output, *next;
int x = 0, y = 0;
int x_offset = 0, y_offset = 0;
uint32_t connected = 0, disconnects = 0;
int i;
resources = drmModeGetResources(ec->drm.fd);
if (!resources) {
fprintf(stderr, "drmModeGetResources failed\n");
return;
}
/* collect new connects */
for (i = 0; i < resources->count_connectors; i++) {
int connector_id = resources->connectors[i];
connector = drmModeGetConnector(ec->drm.fd, connector_id);
if (connector == NULL ||
connector->connection != DRM_MODE_CONNECTED)
continue;
connected |= (1 << connector_id);
if (!(ec->connector_allocator & (1 << connector_id))) {
struct wlsc_output *last =
container_of(ec->base.output_list.prev,
struct wlsc_output, link);
/* XXX: not yet needed, we die with 0 outputs */
if (!wl_list_empty(&ec->base.output_list))
x = last->x + last->current->width;
else
x = 0;
y = 0;
create_output_for_connector(ec, resources,
connector, x, y);
printf("connector %d connected\n", connector_id);
}
drmModeFreeConnector(connector);
}
drmModeFreeResources(resources);
disconnects = ec->connector_allocator & ~connected;
if (disconnects) {
wl_list_for_each_safe(output, next, &ec->base.output_list,
base.link) {
if (x_offset != 0 || y_offset != 0) {
wlsc_output_move(&output->base,
output->base.x - x_offset,
output->base.y - y_offset);
}
if (disconnects & (1 << output->connector_id)) {
disconnects &= ~(1 << output->connector_id);
printf("connector %d disconnected\n",
output->connector_id);
x_offset += output->base.current->width;
drm_output_destroy(&output->base);
}
}
}
/* FIXME: handle zero outputs, without terminating */
if (ec->connector_allocator == 0)
wl_display_terminate(ec->base.wl_display);
}
static int
udev_event_is_hotplug(struct udev_device *device)
{
struct udev_list_entry *list, *hotplug_entry;
list = udev_device_get_properties_list_entry(device);
hotplug_entry = udev_list_entry_get_by_name(list, "HOTPLUG");
if (hotplug_entry == NULL)
return 0;
return strcmp(udev_list_entry_get_value(hotplug_entry), "1") == 0;
}
static int
udev_drm_event(int fd, uint32_t mask, void *data)
{
struct drm_compositor *ec = data;
struct udev_device *event;
event = udev_monitor_receive_device(ec->udev_monitor);
if (udev_event_is_hotplug(event))
update_outputs(ec);
udev_device_unref(event);
return 1;
}
static EGLImageKHR
drm_compositor_create_cursor_image(struct wlsc_compositor *ec,
int32_t *width, int32_t *height)
{
struct drm_compositor *c = (struct drm_compositor *) ec;
struct gbm_bo *bo;
EGLImageKHR image;
if (*width > 64 || *height > 64)
return EGL_NO_IMAGE_KHR;
bo = gbm_bo_create(c->gbm,
/* width, height, */ 64, 64,
GBM_BO_FORMAT_ARGB8888,
GBM_BO_USE_CURSOR_64X64 | GBM_BO_USE_RENDERING);
image = ec->create_image(c->base.display, NULL,
EGL_NATIVE_PIXMAP_KHR, bo, NULL);
gbm_bo_destroy(bo);
*width = 64;
*height = 64;
return image;
}
static void
drm_destroy(struct wlsc_compositor *ec)
{
struct drm_compositor *d = (struct drm_compositor *) ec;
wlsc_compositor_shutdown(ec);
gbm_device_destroy(d->gbm);
tty_destroy(d->tty);
free(d);
}
static void
vt_func(struct wlsc_compositor *compositor, int event)
{
struct drm_compositor *ec = (struct drm_compositor *) compositor;
struct wlsc_output *output;
switch (event) {
case TTY_ENTER_VT:
compositor->focus = 1;
drmSetMaster(ec->drm.fd);
compositor->state = WLSC_COMPOSITOR_ACTIVE;
wlsc_compositor_damage_all(compositor);
break;
case TTY_LEAVE_VT:
compositor->focus = 0;
compositor->state = WLSC_COMPOSITOR_SLEEPING;
wl_list_for_each(output, &ec->base.output_list, link)
drm_output_set_cursor(output, NULL);
drmDropMaster(ec->drm.fd);
break;
};
}
static const char default_seat[] = "seat0";
static struct wlsc_compositor *
drm_compositor_create(struct wl_display *display,
int connector, const char *seat, int tty)
{
struct drm_compositor *ec;
struct udev_enumerate *e;
struct udev_list_entry *entry;
struct udev_device *device, *drm_device;
const char *path, *device_seat;
struct wl_event_loop *loop;
ec = malloc(sizeof *ec);
if (ec == NULL)
return NULL;
memset(ec, 0, sizeof *ec);
ec->udev = udev_new();
if (ec->udev == NULL) {
fprintf(stderr, "failed to initialize udev context\n");
return NULL;
}
e = udev_enumerate_new(ec->udev);
udev_enumerate_add_match_subsystem(e, "drm");
udev_enumerate_add_match_sysname(e, "card[0-9]*");
udev_enumerate_scan_devices(e);
drm_device = NULL;
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
path = udev_list_entry_get_name(entry);
device = udev_device_new_from_syspath(ec->udev, path);
device_seat =
udev_device_get_property_value(device, "ID_SEAT");
if (!device_seat)
device_seat = default_seat;
if (strcmp(device_seat, seat) == 0) {
drm_device = device;
break;
}
udev_device_unref(device);
}
if (drm_device == NULL) {
fprintf(stderr, "no drm device found\n");
return NULL;
}
ec->base.wl_display = display;
if (init_egl(ec, drm_device) < 0) {
fprintf(stderr, "failed to initialize egl\n");
return NULL;
}
udev_device_unref(drm_device);
ec->base.destroy = drm_destroy;
ec->base.create_cursor_image = drm_compositor_create_cursor_image;
ec->base.focus = 1;
glGenFramebuffers(1, &ec->base.fbo);
glBindFramebuffer(GL_FRAMEBUFFER, ec->base.fbo);
/* Can't init base class until we have a current egl context */
if (wlsc_compositor_init(&ec->base, display) < 0)
return NULL;
if (create_outputs(ec, connector) < 0) {
fprintf(stderr, "failed to create output for %s\n", path);
return NULL;
}
udev_enumerate_unref(e);
path = NULL;
evdev_input_add_devices(&ec->base, ec->udev, seat);
loop = wl_display_get_event_loop(ec->base.wl_display);
ec->drm_source =
wl_event_loop_add_fd(loop, ec->drm.fd,
WL_EVENT_READABLE, on_drm_input, ec);
ec->tty = tty_create(&ec->base, vt_func, tty);
ec->udev_monitor = udev_monitor_new_from_netlink(ec->udev, "udev");
if (ec->udev_monitor == NULL) {
fprintf(stderr, "failed to intialize udev monitor\n");
return NULL;
}
udev_monitor_filter_add_match_subsystem_devtype(ec->udev_monitor,
"drm", NULL);
ec->udev_drm_source =
wl_event_loop_add_fd(loop,
udev_monitor_get_fd(ec->udev_monitor),
WL_EVENT_READABLE, udev_drm_event, ec);
if (udev_monitor_enable_receiving(ec->udev_monitor) < 0) {
fprintf(stderr, "failed to enable udev-monitor receiving\n");
return NULL;
}
return &ec->base;
}
struct wlsc_compositor *
backend_init(struct wl_display *display, char *options);
WL_EXPORT struct wlsc_compositor *
backend_init(struct wl_display *display, char *options)
{
int connector = 0, i;
const char *seat;
char *p, *value;
int tty = 1;
static char * const tokens[] = { "connector", "seat", "tty", NULL };
p = options;
seat = default_seat;
while (i = getsubopt(&p, tokens, &value), i != -1) {
switch (i) {
case 0:
connector = strtol(value, NULL, 0);
break;
case 1:
seat = value;
break;
case 2:
tty = strtol(value, NULL, 0);
break;
}
}
return drm_compositor_create(display, connector, seat, tty);
}