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weston/wayland.c

809 lines
18 KiB

#include <stdlib.h>
#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <dlfcn.h>
#include <ffi.h>
#include "wayland.h"
#include "connection.h"
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
struct wl_list {
struct wl_list *prev;
struct wl_list *next;
};
void wl_list_init(struct wl_list *list)
{
list->prev = list;
list->next = list;
}
void
wl_list_insert(struct wl_list *list, struct wl_list *elm)
{
elm->prev = list;
elm->next = list->next;
list->next = elm;
elm->next->prev = elm;
}
void
wl_list_remove(struct wl_list *elm)
{
elm->prev->next = elm->next;
elm->next->prev = elm->prev;
}
struct wl_client {
struct wl_connection *connection;
struct wl_event_source *source;
struct wl_display *display;
struct wl_list object_list;
struct wl_list link;
};
struct wl_display {
struct wl_object base;
struct wl_event_loop *loop;
struct wl_hash objects;
struct wl_object *pointer;
struct wl_compositor *compositor;
struct wl_compositor_interface *compositor_interface;
struct wl_list surface_list;
struct wl_list client_list;
uint32_t client_id_range;
int32_t pointer_x;
int32_t pointer_y;
};
struct wl_surface {
struct wl_object base;
/* provided by client */
int width, height;
int buffer;
int stride;
struct wl_map map;
struct wl_list link;
/* how to convert buffer contents to pixels in screen format;
* yuv->rgb, indexed->rgb, svg->rgb, but mostly just rgb->rgb. */
/* how to transform/render rectangular contents to polygons. */
void *compositor_data;
};
struct wl_object_ref {
struct wl_object *object;
struct wl_list link;
};
static void
wl_surface_destroy(struct wl_client *client,
struct wl_surface *surface)
{
const struct wl_compositor_interface *interface;
interface = client->display->compositor->interface;
interface->notify_surface_destroy(client->display->compositor,
surface);
wl_list_remove(&surface->link);
}
static void
wl_surface_attach(struct wl_client *client,
struct wl_surface *surface, uint32_t name,
uint32_t width, uint32_t height, uint32_t stride)
{
const struct wl_compositor_interface *interface;
interface = client->display->compositor->interface;
interface->notify_surface_attach(client->display->compositor,
surface, name, width, height, stride);
}
static const struct wl_argument attach_arguments[] = {
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
};
void
wl_surface_map(struct wl_client *client, struct wl_surface *surface,
int32_t x, int32_t y, int32_t width, int32_t height)
{
const struct wl_compositor_interface *interface;
/* FIXME: This needs to take a tri-mesh argument... - count
* and a list of tris. 0 tris means unmap. */
surface->map.x = x;
surface->map.y = y;
surface->map.width = width;
surface->map.height = height;
interface = client->display->compositor->interface;
interface->notify_surface_map(client->display->compositor,
surface, &surface->map);
}
static const struct wl_argument map_arguments[] = {
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
};
void
wl_surface_copy(struct wl_client *client, struct wl_surface *surface,
int32_t dst_x, int32_t dst_y, uint32_t name, uint32_t stride,
int32_t x, int32_t y, int32_t width, int32_t height)
{
const struct wl_compositor_interface *interface;
interface = client->display->compositor->interface;
interface->notify_surface_copy(client->display->compositor,
surface, dst_x, dst_y,
name, stride, x, y, width, height);
}
static const struct wl_argument copy_arguments[] = {
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
};
void
wl_surface_damage(struct wl_client *client, struct wl_surface *surface,
int32_t x, int32_t y, int32_t width, int32_t height)
{
const struct wl_compositor_interface *interface;
interface = client->display->compositor->interface;
interface->notify_surface_damage(client->display->compositor,
surface, x, y, width, height);
}
static const struct wl_argument damage_arguments[] = {
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
{ WL_ARGUMENT_UINT32 },
};
static const struct wl_method surface_methods[] = {
{ "destroy", wl_surface_destroy,
0, NULL },
{ "attach", wl_surface_attach,
ARRAY_LENGTH(attach_arguments), attach_arguments },
{ "map", wl_surface_map,
ARRAY_LENGTH(map_arguments), map_arguments },
{ "copy", wl_surface_copy,
ARRAY_LENGTH(copy_arguments), copy_arguments },
{ "damage", wl_surface_damage,
ARRAY_LENGTH(damage_arguments), damage_arguments }
};
static const struct wl_interface surface_interface = {
"surface", 1,
ARRAY_LENGTH(surface_methods),
surface_methods,
};
struct wl_surface *
wl_surface_create(struct wl_display *display, uint32_t id)
{
struct wl_surface *surface;
const struct wl_compositor_interface *interface;
surface = malloc(sizeof *surface);
if (surface == NULL)
return NULL;
surface->base.id = id;
surface->base.interface = &surface_interface;
wl_list_insert(display->surface_list.prev, &surface->link);
interface = display->compositor->interface;
interface->notify_surface_create(display->compositor, surface);
return surface;
}
void
wl_surface_set_data(struct wl_surface *surface, void *data)
{
surface->compositor_data = data;
}
void *
wl_surface_get_data(struct wl_surface *surface)
{
return surface->compositor_data;
}
void
wl_client_destroy(struct wl_client *client);
static void
wl_client_demarshal(struct wl_client *client, struct wl_object *target,
const struct wl_method *method, size_t size)
{
ffi_type *types[20];
ffi_cif cif;
uint32_t *p, result;
int i;
union {
uint32_t uint32;
const char *string;
void *object;
uint32_t new_id;
} values[20];
void *args[20];
struct wl_object *object;
uint32_t data[64];
if (method->argument_count > ARRAY_LENGTH(types)) {
printf("too many args (%d)\n", method->argument_count);
return;
}
if (sizeof data < size) {
printf("request too big, should malloc tmp buffer here\n");
return;
}
types[0] = &ffi_type_pointer;
values[0].object = client;
args[0] = &values[0];
types[1] = &ffi_type_pointer;
values[1].object = target;
args[1] = &values[1];
wl_connection_copy(client->connection, data, size);
p = &data[2];
for (i = 0; i < method->argument_count; i++) {
switch (method->arguments[i].type) {
case WL_ARGUMENT_UINT32:
types[i + 2] = &ffi_type_uint32;
values[i + 2].uint32 = *p;
p++;
break;
case WL_ARGUMENT_STRING:
types[i + 2] = &ffi_type_pointer;
/* FIXME */
values[i + 2].uint32 = *p++;
break;
case WL_ARGUMENT_OBJECT:
types[i + 2] = &ffi_type_pointer;
object = wl_hash_lookup(&client->display->objects, *p);
if (object == NULL)
printf("unknown object (%d)\n", *p);
if (object->interface != method->arguments[i].data)
printf("wrong object type\n");
values[i + 2].object = object;
p++;
break;
case WL_ARGUMENT_NEW_ID:
types[i + 2] = &ffi_type_uint32;
values[i + 2].new_id = *p;
object = wl_hash_lookup(&client->display->objects, *p);
if (object != NULL)
printf("object already exists (%d)\n", *p);
p++;
break;
default:
printf("unknown type\n");
break;
}
args[i + 2] = &values[i + 2];
}
ffi_prep_cif(&cif, FFI_DEFAULT_ABI, method->argument_count + 2,
&ffi_type_uint32, types);
ffi_call(&cif, FFI_FN(method->func), &result, args);
}
static void
wl_client_event(struct wl_client *client, struct wl_object *object, uint32_t event)
{
uint32_t p[2];
p[0] = object->id;
p[1] = event | (8 << 16);
wl_connection_write(client->connection, p, sizeof p);
}
#define WL_DISPLAY_INVALID_OBJECT 0
#define WL_DISPLAY_INVALID_METHOD 1
#define WL_DISPLAY_NO_MEMORY 2
static void
wl_client_connection_data(int fd, uint32_t mask, void *data)
{
struct wl_client *client = data;
struct wl_connection *connection = client->connection;
const struct wl_method *method;
struct wl_object *object;
uint32_t p[2], opcode, size;
uint32_t cmask = 0;
int len;
if (mask & WL_EVENT_READABLE)
cmask |= WL_CONNECTION_READABLE;
if (mask & WL_EVENT_WRITEABLE)
cmask |= WL_CONNECTION_WRITABLE;
len = wl_connection_data(connection, cmask);
if (len < 0) {
wl_client_destroy(client);
return;
}
while (len > sizeof p) {
wl_connection_copy(connection, p, sizeof p);
opcode = p[1] & 0xffff;
size = p[1] >> 16;
if (len < size)
break;
object = wl_hash_lookup(&client->display->objects,
p[0]);
if (object == NULL) {
wl_client_event(client, &client->display->base,
WL_DISPLAY_INVALID_OBJECT);
wl_connection_consume(connection, size);
len -= size;
continue;
}
if (opcode >= object->interface->method_count) {
wl_client_event(client, &client->display->base,
WL_DISPLAY_INVALID_METHOD);
wl_connection_consume(connection, size);
len -= size;
continue;
}
method = &object->interface->methods[opcode];
wl_client_demarshal(client, object, method, size);
wl_connection_consume(connection, size);
len -= size;
}
}
static int
wl_client_connection_update(struct wl_connection *connection,
uint32_t mask, void *data)
{
struct wl_client *client = data;
uint32_t emask = 0;
if (mask & WL_CONNECTION_READABLE)
emask |= WL_EVENT_READABLE;
if (mask & WL_CONNECTION_WRITABLE)
emask |= WL_EVENT_WRITEABLE;
return wl_event_loop_update_source(client->display->loop,
client->source, mask);
}
static void
advertise_object(struct wl_client *client, struct wl_object *object)
{
const struct wl_interface *interface;
static const char pad[4];
uint32_t length, p[2];
interface = object->interface;
length = strlen(interface->name);
p[0] = object->id;
p[1] = length;
wl_connection_write(client->connection, p, sizeof p);
wl_connection_write(client->connection, interface->name, length);
wl_connection_write(client->connection, pad, -length & 3);
}
struct wl_client *
wl_client_create(struct wl_display *display, int fd)
{
struct wl_client *client;
client = malloc(sizeof *client);
if (client == NULL)
return NULL;
memset(client, 0, sizeof *client);
client->display = display;
client->source = wl_event_loop_add_fd(display->loop, fd,
WL_EVENT_READABLE,
wl_client_connection_data, client);
client->connection = wl_connection_create(fd,
wl_client_connection_update,
client);
wl_list_init(&client->object_list);
wl_connection_write(client->connection,
&display->client_id_range,
sizeof display->client_id_range);
display->client_id_range += 256;
advertise_object(client, &display->base);
wl_list_insert(display->client_list.prev, &client->link);
return client;
}
void
wl_client_destroy(struct wl_client *client)
{
struct wl_object_ref *ref;
printf("disconnect from client %p\n", client);
wl_list_remove(&client->link);
while (client->object_list.next != &client->object_list) {
ref = container_of(client->object_list.next,
struct wl_object_ref, link);
wl_list_remove(&ref->link);
wl_surface_destroy(client, (struct wl_surface *) ref->object);
free(ref);
}
wl_event_loop_remove_source(client->display->loop, client->source);
wl_connection_destroy(client->connection);
free(client);
}
static int
wl_display_create_surface(struct wl_client *client,
struct wl_display *display, uint32_t id)
{
struct wl_surface *surface;
struct wl_object_ref *ref;
surface = wl_surface_create(display, id);
ref = malloc(sizeof *ref);
if (ref == NULL) {
wl_client_event(client, &display->base,
WL_DISPLAY_NO_MEMORY);
return -1;
}
ref->object = &surface->base;
wl_hash_insert(&display->objects, &surface->base);
wl_list_insert(client->object_list.prev, &ref->link);
return 0;
}
static const struct wl_argument create_surface_arguments[] = {
{ WL_ARGUMENT_NEW_ID }
};
static const struct wl_method display_methods[] = {
{ "create_surface", wl_display_create_surface,
ARRAY_LENGTH(create_surface_arguments), create_surface_arguments },
};
static const struct wl_event display_events[] = {
{ "invalid_object" },
{ "invalid_method" },
};
static const struct wl_interface display_interface = {
"display", 1,
ARRAY_LENGTH(display_methods), display_methods,
ARRAY_LENGTH(display_events), display_events,
};
static const char input_device_file[] =
"/dev/input/by-id/usb-Apple__Inc._Apple_Internal_Keyboard_._Trackpad-event-mouse";
static void
wl_display_create_input_devices(struct wl_display *display)
{
const char *path;
path = getenv("WAYLAND_POINTER");
if (path == NULL)
path = input_device_file;
display->pointer = wl_input_device_create(display, path, 1);
if (display->pointer != NULL)
wl_hash_insert(&display->objects, display->pointer);
display->pointer_x = 100;
display->pointer_y = 100;
}
struct wl_display *
wl_display_create(void)
{
struct wl_display *display;
display = malloc(sizeof *display);
if (display == NULL)
return NULL;
display->loop = wl_event_loop_create();
if (display->loop == NULL) {
free(display);
return NULL;
}
display->base.id = 0;
display->base.interface = &display_interface;
wl_hash_insert(&display->objects, &display->base);
wl_list_init(&display->surface_list);
wl_list_init(&display->client_list);
wl_display_create_input_devices(display);
display->client_id_range = 256; /* Gah, arbitrary... */
return display;
}
void
wl_display_send_event(struct wl_display *display, uint32_t *data, size_t size)
{
struct wl_client *client;
client = container_of(display->client_list.next,
struct wl_client, link);
while (&client->link != &display->client_list) {
wl_connection_write(client->connection, data, size);
client = container_of(client->link.next,
struct wl_client, link);
}
}
#define WL_POINTER_MOTION 0
#define WL_POINTER_BUTTON 1
void
wl_display_post_relative_event(struct wl_display *display,
struct wl_object *source, int dx, int dy)
{
uint32_t p[4];
display->pointer_x += dx;
display->pointer_y += dy;
p[0] = source->id;
p[1] = (sizeof p << 16) | WL_POINTER_MOTION;
p[2] = display->pointer_x;
p[3] = display->pointer_y;
wl_display_send_event(display, p, sizeof p);
}
void
wl_display_post_absolute_event(struct wl_display *display,
struct wl_object *source, int x, int y)
{
uint32_t p[4];
display->pointer_x = x;
display->pointer_y = y;
p[0] = source->id;
p[1] = (sizeof p << 16) | WL_POINTER_MOTION;
p[2] = display->pointer_x;
p[3] = display->pointer_y;
wl_display_send_event(display, p, sizeof p);
}
void
wl_display_post_button_event(struct wl_display *display,
struct wl_object *source, int button, int state)
{
uint32_t p[4];
p[0] = source->id;
p[1] = (sizeof p << 16) | WL_POINTER_BUTTON;
p[2] = button;
p[3] = state;
wl_display_send_event(display, p, sizeof p);
}
void
wl_display_set_compositor(struct wl_display *display,
struct wl_compositor *compositor)
{
display->compositor = compositor;
}
struct wl_event_loop *
wl_display_get_event_loop(struct wl_display *display)
{
return display->loop;
}
void
wl_display_run(struct wl_display *display)
{
while (1)
wl_event_loop_wait(display->loop);
}
/* The plan here is to generate a random anonymous socket name and
* advertise that through a service on the session dbus.
*/
static const char socket_name[] = "\0wayland";
static void
socket_data(int fd, uint32_t mask, void *data)
{
struct wl_display *display = data;
struct sockaddr_un name;
socklen_t length;
int client_fd;
length = sizeof name;
client_fd = accept (fd, (struct sockaddr *) &name, &length);
if (client_fd < 0)
fprintf(stderr, "failed to accept\n");
wl_client_create(display, client_fd);
}
int
wl_display_add_socket(struct wl_display *display)
{
struct sockaddr_un name;
int sock;
socklen_t size;
sock = socket(PF_LOCAL, SOCK_STREAM, 0);
if (sock < 0)
return -1;
name.sun_family = AF_LOCAL;
memcpy(name.sun_path, socket_name, sizeof socket_name);
size = offsetof (struct sockaddr_un, sun_path) + sizeof socket_name;
if (bind(sock, (struct sockaddr *) &name, size) < 0)
return -1;
if (listen(sock, 1) < 0)
return -1;
wl_event_loop_add_fd(display->loop, sock,
WL_EVENT_READABLE,
socket_data, display);
return 0;
}
struct wl_surface_iterator {
struct wl_list *head;
struct wl_surface *surface;
uint32_t mask;
};
struct wl_surface_iterator *
wl_surface_iterator_create(struct wl_display *display, uint32_t mask)
{
struct wl_surface_iterator *iterator;
iterator = malloc(sizeof *iterator);
if (iterator == NULL)
return NULL;
iterator->head = &display->surface_list;
iterator->surface = container_of(display->surface_list.next,
struct wl_surface, link);
iterator->mask = mask;
return iterator;
}
int
wl_surface_iterator_next(struct wl_surface_iterator *iterator,
struct wl_surface **surface)
{
if (&iterator->surface->link == iterator->head)
return 0;
*surface = iterator->surface;
iterator->surface = container_of(iterator->surface->link.next,
struct wl_surface, link);
return 1;
}
void
wl_surface_iterator_destroy(struct wl_surface_iterator *iterator)
{
free(iterator);
}
static int
load_compositor(struct wl_display *display, const char *path)
{
struct wl_compositor *(*create)(struct wl_display *display);
struct wl_compositor *compositor;
void *p;
p = dlopen(path, RTLD_LAZY | RTLD_GLOBAL);
if (p == NULL) {
fprintf(stderr, "failed to open compositor %s: %s\n",
path, dlerror());
return -1;
}
create = dlsym(p, "wl_compositor_create");
if (create == NULL) {
fprintf(stderr, "failed to look up compositor constructor\n");
return -1;
}
compositor = create(display);
if (compositor == NULL) {
fprintf(stderr, "couldn't create compositor\n");
return -1;
}
wl_display_set_compositor(display, compositor);
return 0;
}
int main(int argc, char *argv[])
{
struct wl_display *display;
const char *compositor = "./egl-compositor.so";
display = wl_display_create();
if (wl_display_add_socket(display)) {
fprintf(stderr, "failed to add socket: %m\n");
exit(EXIT_FAILURE);
}
if (argc == 2)
compositor = argv[1];
load_compositor(display, compositor);
wl_display_run(display);
return 0;
}