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weston/compositor/screen-share.c

1150 lines
29 KiB

/*
* Copyright © 2008-2011 Kristian Høgsberg
* Copyright © 2014 Jason Ekstrand
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/mman.h>
#include <signal.h>
#include <linux/input.h>
#include <errno.h>
#include <ctype.h>
#include <wayland-client.h>
#include <libweston/libweston.h>
#include "backend.h"
#include "libweston-internal.h"
#include "weston.h"
#include "shared/helpers.h"
#include "shared/os-compatibility.h"
#include "shared/timespec-util.h"
#include "fullscreen-shell-unstable-v1-client-protocol.h"
struct shared_output {
struct weston_output *output;
struct wl_listener output_destroyed;
struct wl_list seat_list;
struct {
struct wl_display *display;
struct wl_registry *registry;
struct wl_compositor *compositor;
struct wl_shm *shm;
uint32_t shm_formats;
struct zwp_fullscreen_shell_v1 *fshell;
struct wl_output *output;
struct wl_surface *surface;
struct wl_callback *frame_cb;
struct zwp_fullscreen_shell_mode_feedback_v1 *mode_feedback;
} parent;
struct wl_event_source *event_source;
struct wl_listener frame_listener;
struct {
int32_t width, height;
struct wl_list buffers;
struct wl_list free_buffers;
} shm;
int cache_dirty;
pixman_image_t *cache_image;
uint32_t *tmp_data;
size_t tmp_data_size;
};
struct ss_seat {
struct weston_seat base;
struct shared_output *output;
struct wl_list link;
struct {
struct wl_seat *seat;
struct wl_pointer *pointer;
struct wl_keyboard *keyboard;
} parent;
enum weston_key_state_update keyboard_state_update;
uint32_t key_serial;
};
struct ss_shm_buffer {
struct shared_output *output;
struct wl_list link;
struct wl_list free_link;
struct wl_buffer *buffer;
void *data;
size_t size;
pixman_region32_t damage;
pixman_image_t *pm_image;
};
struct screen_share {
struct weston_compositor *compositor;
char *command;
};
static void
ss_seat_handle_pointer_enter(void *data, struct wl_pointer *pointer,
uint32_t serial, struct wl_surface *surface,
wl_fixed_t x, wl_fixed_t y)
{
struct ss_seat *seat = data;
/* No transformation of input position is required here because we are
* always receiving the input in the same coordinates as the output. */
notify_pointer_focus(&seat->base, NULL, 0, 0);
}
static void
ss_seat_handle_pointer_leave(void *data, struct wl_pointer *pointer,
uint32_t serial, struct wl_surface *surface)
{
struct ss_seat *seat = data;
notify_pointer_focus(&seat->base, NULL, 0, 0);
}
static void
ss_seat_handle_motion(void *data, struct wl_pointer *pointer,
uint32_t time, wl_fixed_t x, wl_fixed_t y)
{
struct ss_seat *seat = data;
struct timespec ts;
timespec_from_msec(&ts, time);
/* No transformation of input position is required here because we are
* always receiving the input in the same coordinates as the output. */
notify_motion_absolute(&seat->base, &ts,
wl_fixed_to_double(x), wl_fixed_to_double(y));
notify_pointer_frame(&seat->base);
}
static void
ss_seat_handle_button(void *data, struct wl_pointer *pointer,
uint32_t serial, uint32_t time, uint32_t button,
uint32_t state)
{
struct ss_seat *seat = data;
struct timespec ts;
timespec_from_msec(&ts, time);
notify_button(&seat->base, &ts, button, state);
notify_pointer_frame(&seat->base);
}
static void
ss_seat_handle_axis(void *data, struct wl_pointer *pointer,
uint32_t time, uint32_t axis, wl_fixed_t value)
{
struct ss_seat *seat = data;
struct weston_pointer_axis_event weston_event;
struct timespec ts;
weston_event.axis = axis;
weston_event.value = wl_fixed_to_double(value);
weston_event.has_discrete = false;
timespec_from_msec(&ts, time);
notify_axis(&seat->base, &ts, &weston_event);
notify_pointer_frame(&seat->base);
}
static const struct wl_pointer_listener ss_seat_pointer_listener = {
ss_seat_handle_pointer_enter,
ss_seat_handle_pointer_leave,
ss_seat_handle_motion,
ss_seat_handle_button,
ss_seat_handle_axis,
};
static void
ss_seat_handle_keymap(void *data, struct wl_keyboard *wl_keyboard,
uint32_t format, int fd, uint32_t size)
{
struct ss_seat *seat = data;
struct xkb_keymap *keymap;
char *map_str;
if (!data)
goto error_no_seat;
if (format == WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1) {
map_str = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
if (map_str == MAP_FAILED) {
weston_log("mmap failed: %s\n", strerror(errno));
goto error;
}
keymap = xkb_keymap_new_from_string(seat->base.compositor->xkb_context,
map_str,
XKB_KEYMAP_FORMAT_TEXT_V1,
0);
munmap(map_str, size);
if (!keymap) {
weston_log("failed to compile keymap\n");
goto error;
}
seat->keyboard_state_update = STATE_UPDATE_NONE;
} else if (format == WL_KEYBOARD_KEYMAP_FORMAT_NO_KEYMAP) {
weston_log("No keymap provided; falling back to default\n");
keymap = NULL;
seat->keyboard_state_update = STATE_UPDATE_AUTOMATIC;
} else {
weston_log("Invalid keymap\n");
goto error;
}
close(fd);
if (seat->base.keyboard_device_count)
weston_seat_update_keymap(&seat->base, keymap);
else
weston_seat_init_keyboard(&seat->base, keymap);
xkb_keymap_unref(keymap);
return;
error:
wl_keyboard_release(seat->parent.keyboard);
error_no_seat:
close(fd);
}
static void
ss_seat_handle_keyboard_enter(void *data, struct wl_keyboard *keyboard,
uint32_t serial, struct wl_surface *surface,
struct wl_array *keys)
{
struct ss_seat *seat = data;
/* XXX: If we get a modifier event immediately before the focus,
* we should try to keep the same serial. */
notify_keyboard_focus_in(&seat->base, keys,
STATE_UPDATE_AUTOMATIC);
}
static void
ss_seat_handle_keyboard_leave(void *data, struct wl_keyboard *keyboard,
uint32_t serial, struct wl_surface *surface)
{
struct ss_seat *seat = data;
notify_keyboard_focus_out(&seat->base);
}
static void
ss_seat_handle_key(void *data, struct wl_keyboard *keyboard,
uint32_t serial, uint32_t time,
uint32_t key, uint32_t state)
{
struct ss_seat *seat = data;
struct timespec ts;
timespec_from_msec(&ts, time);
seat->key_serial = serial;
notify_key(&seat->base, &ts, key,
state ? WL_KEYBOARD_KEY_STATE_PRESSED :
WL_KEYBOARD_KEY_STATE_RELEASED,
seat->keyboard_state_update);
}
static void
ss_seat_handle_modifiers(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial_in, uint32_t mods_depressed,
uint32_t mods_latched, uint32_t mods_locked,
uint32_t group)
{
struct ss_seat *seat = data;
struct weston_compositor *c = seat->base.compositor;
struct weston_keyboard *keyboard;
uint32_t serial_out;
/* If we get a key event followed by a modifier event with the
* same serial number, then we try to preserve those semantics by
* reusing the same serial number on the way out too. */
if (serial_in == seat->key_serial)
serial_out = wl_display_get_serial(c->wl_display);
else
serial_out = wl_display_next_serial(c->wl_display);
keyboard = weston_seat_get_keyboard(&seat->base);
xkb_state_update_mask(keyboard->xkb_state.state,
mods_depressed, mods_latched,
mods_locked, 0, 0, group);
notify_modifiers(&seat->base, serial_out);
}
static const struct wl_keyboard_listener ss_seat_keyboard_listener = {
ss_seat_handle_keymap,
ss_seat_handle_keyboard_enter,
ss_seat_handle_keyboard_leave,
ss_seat_handle_key,
ss_seat_handle_modifiers,
};
static void
ss_seat_handle_capabilities(void *data, struct wl_seat *seat,
enum wl_seat_capability caps)
{
struct ss_seat *ss_seat = data;
if ((caps & WL_SEAT_CAPABILITY_POINTER) && !ss_seat->parent.pointer) {
ss_seat->parent.pointer = wl_seat_get_pointer(seat);
wl_pointer_set_user_data(ss_seat->parent.pointer, ss_seat);
wl_pointer_add_listener(ss_seat->parent.pointer,
&ss_seat_pointer_listener, ss_seat);
weston_seat_init_pointer(&ss_seat->base);
} else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && ss_seat->parent.pointer) {
wl_pointer_destroy(ss_seat->parent.pointer);
ss_seat->parent.pointer = NULL;
}
if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !ss_seat->parent.keyboard) {
ss_seat->parent.keyboard = wl_seat_get_keyboard(seat);
wl_keyboard_set_user_data(ss_seat->parent.keyboard, ss_seat);
wl_keyboard_add_listener(ss_seat->parent.keyboard,
&ss_seat_keyboard_listener, ss_seat);
} else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && ss_seat->parent.keyboard) {
wl_keyboard_destroy(ss_seat->parent.keyboard);
ss_seat->parent.keyboard = NULL;
}
}
static const struct wl_seat_listener ss_seat_listener = {
ss_seat_handle_capabilities,
};
static struct ss_seat *
ss_seat_create(struct shared_output *so, uint32_t id)
{
struct ss_seat *seat;
seat = zalloc(sizeof *seat);
if (seat == NULL)
return NULL;
weston_seat_init(&seat->base, so->output->compositor, "default");
seat->output = so;
seat->parent.seat = wl_registry_bind(so->parent.registry, id,
&wl_seat_interface, 1);
wl_list_insert(so->seat_list.prev, &seat->link);
wl_seat_add_listener(seat->parent.seat, &ss_seat_listener, seat);
wl_seat_set_user_data(seat->parent.seat, seat);
return seat;
}
static void
ss_seat_destroy(struct ss_seat *seat)
{
if (seat->parent.pointer)
wl_pointer_release(seat->parent.pointer);
if (seat->parent.keyboard)
wl_keyboard_release(seat->parent.keyboard);
wl_seat_destroy(seat->parent.seat);
wl_list_remove(&seat->link);
weston_seat_release(&seat->base);
free(seat);
}
static void
ss_shm_buffer_destroy(struct ss_shm_buffer *buffer)
{
pixman_image_unref(buffer->pm_image);
wl_buffer_destroy(buffer->buffer);
munmap(buffer->data, buffer->size);
pixman_region32_fini(&buffer->damage);
wl_list_remove(&buffer->link);
wl_list_remove(&buffer->free_link);
free(buffer);
}
static void
buffer_release(void *data, struct wl_buffer *buffer)
{
struct ss_shm_buffer *sb = data;
if (sb->output) {
wl_list_insert(&sb->output->shm.free_buffers, &sb->free_link);
} else {
ss_shm_buffer_destroy(sb);
}
}
static const struct wl_buffer_listener buffer_listener = {
buffer_release
};
static struct ss_shm_buffer *
shared_output_get_shm_buffer(struct shared_output *so)
{
struct ss_shm_buffer *sb, *bnext;
struct wl_shm_pool *pool;
int width, height, stride;
int fd;
unsigned char *data;
width = so->output->width;
height = so->output->height;
stride = width * 4;
/* If the size of the output changed, we free the old buffers and
* make new ones. */
if (so->shm.width != width ||
so->shm.height != height) {
/* Destroy free buffers */
wl_list_for_each_safe(sb, bnext, &so->shm.free_buffers, free_link)
ss_shm_buffer_destroy(sb);
/* Orphan in-use buffers so they get destroyed */
wl_list_for_each(sb, &so->shm.buffers, link)
sb->output = NULL;
so->shm.width = width;
so->shm.height = height;
}
if (!wl_list_empty(&so->shm.free_buffers)) {
sb = container_of(so->shm.free_buffers.next,
struct ss_shm_buffer, free_link);
wl_list_remove(&sb->free_link);
wl_list_init(&sb->free_link);
return sb;
}
fd = os_create_anonymous_file(height * stride);
if (fd < 0) {
weston_log("os_create_anonymous_file: %s\n", strerror(errno));
return NULL;
}
data = mmap(NULL, height * stride, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (data == MAP_FAILED) {
weston_log("mmap: %s\n", strerror(errno));
goto out_close;
}
sb = zalloc(sizeof *sb);
if (!sb)
goto out_unmap;
sb->output = so;
wl_list_init(&sb->free_link);
wl_list_insert(&so->shm.buffers, &sb->link);
pixman_region32_init_rect(&sb->damage, 0, 0, width, height);
sb->data = data;
sb->size = height * stride;
pool = wl_shm_create_pool(so->parent.shm, fd, sb->size);
sb->buffer = wl_shm_pool_create_buffer(pool, 0,
width, height, stride,
WL_SHM_FORMAT_ARGB8888);
wl_buffer_add_listener(sb->buffer, &buffer_listener, sb);
wl_shm_pool_destroy(pool);
close(fd);
fd = -1;
memset(data, 0, sb->size);
sb->pm_image =
pixman_image_create_bits(PIXMAN_a8r8g8b8, width, height,
(uint32_t *)data, stride);
if (!sb->pm_image)
goto out_pixman_error;
return sb;
out_pixman_error:
pixman_region32_fini(&sb->damage);
out_unmap:
munmap(data, height * stride);
out_close:
if (fd != -1)
close(fd);
return NULL;
}
static void
output_compute_transform(struct weston_output *output,
pixman_transform_t *transform)
{
pixman_fixed_t fw, fh;
pixman_transform_init_identity(transform);
fw = pixman_int_to_fixed(output->width);
fh = pixman_int_to_fixed(output->height);
switch (output->transform) {
case WL_OUTPUT_TRANSFORM_FLIPPED:
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
pixman_transform_scale(transform, NULL,
pixman_int_to_fixed (-1),
pixman_int_to_fixed (1));
pixman_transform_translate(transform, NULL, fw, 0);
}
switch (output->transform) {
default:
case WL_OUTPUT_TRANSFORM_NORMAL:
case WL_OUTPUT_TRANSFORM_FLIPPED:
break;
case WL_OUTPUT_TRANSFORM_90:
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
pixman_transform_rotate(transform, NULL, 0, pixman_fixed_1);
pixman_transform_translate(transform, NULL, fh, 0);
break;
case WL_OUTPUT_TRANSFORM_180:
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
pixman_transform_rotate(transform, NULL, -pixman_fixed_1, 0);
pixman_transform_translate(transform, NULL, fw, fh);
break;
case WL_OUTPUT_TRANSFORM_270:
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
pixman_transform_rotate(transform, NULL, 0, -pixman_fixed_1);
pixman_transform_translate(transform, NULL, 0, fw);
break;
}
pixman_transform_scale(transform, NULL,
pixman_fixed_1 * output->current_scale,
pixman_fixed_1 * output->current_scale);
}
static void
shared_output_destroy(struct shared_output *so);
static int
shared_output_ensure_tmp_data(struct shared_output *so,
pixman_region32_t *region)
{
pixman_box32_t *ext;
size_t size;
if (!pixman_region32_not_empty(region))
return 0;
ext = pixman_region32_extents(region);
/* Damage is in output coordinates.
*
* We are multiplying by 4 because the temporary data needs to be able
* to store an 32 bit-per-pixel buffer.
*/
size = 4 * (ext->x2 - ext->x1) * (ext->y2 - ext->y1)
* so->output->current_scale * so->output->current_scale;
if (so->tmp_data != NULL && size <= so->tmp_data_size)
return 0;
free(so->tmp_data);
so->tmp_data = malloc(size);
if (so->tmp_data == NULL) {
so->tmp_data_size = 0;
errno = ENOMEM;
return -1;
}
so->tmp_data_size = size;
return 0;
}
static void
shared_output_update(struct shared_output *so);
static void
shared_output_frame_callback(void *data, struct wl_callback *cb, uint32_t time)
{
struct shared_output *so = data;
if (cb != so->parent.frame_cb)
return;
wl_callback_destroy(cb);
so->parent.frame_cb = NULL;
shared_output_update(so);
}
static const struct wl_callback_listener shared_output_frame_listener = {
shared_output_frame_callback
};
static void
shared_output_update(struct shared_output *so)
{
struct ss_shm_buffer *sb;
pixman_box32_t *r;
int i, nrects;
pixman_transform_t transform;
/* Only update if we need to */
if (!so->cache_dirty || so->parent.frame_cb)
return;
sb = shared_output_get_shm_buffer(so);
if (sb == NULL) {
shared_output_destroy(so);
return;
}
output_compute_transform(so->output, &transform);
pixman_image_set_transform(so->cache_image, &transform);
pixman_image_set_clip_region32(sb->pm_image, &sb->damage);
if (so->output->current_scale == 1) {
pixman_image_set_filter(so->cache_image,
PIXMAN_FILTER_NEAREST, NULL, 0);
} else {
pixman_image_set_filter(so->cache_image,
PIXMAN_FILTER_BILINEAR, NULL, 0);
}
pixman_image_composite32(PIXMAN_OP_SRC,
so->cache_image, /* src */
NULL, /* mask */
sb->pm_image, /* dest */
0, 0, /* src_x, src_y */
0, 0, /* mask_x, mask_y */
0, 0, /* dest_x, dest_y */
so->output->width, /* width */
so->output->height /* height */);
pixman_image_set_transform(sb->pm_image, NULL);
pixman_image_set_clip_region32(sb->pm_image, NULL);
r = pixman_region32_rectangles(&sb->damage, &nrects);
for (i = 0; i < nrects; ++i)
wl_surface_damage(so->parent.surface, r[i].x1, r[i].y1,
r[i].x2 - r[i].x1, r[i].y2 - r[i].y1);
wl_surface_attach(so->parent.surface, sb->buffer, 0, 0);
so->parent.frame_cb = wl_surface_frame(so->parent.surface);
wl_callback_add_listener(so->parent.frame_cb,
&shared_output_frame_listener, so);
wl_surface_commit(so->parent.surface);
wl_callback_destroy(wl_display_sync(so->parent.display));
wl_display_flush(so->parent.display);
/* Clear the buffer damage */
pixman_region32_fini(&sb->damage);
pixman_region32_init(&sb->damage);
}
static void
shm_handle_format(void *data, struct wl_shm *wl_shm, uint32_t format)
{
struct shared_output *so = data;
so->parent.shm_formats |= (1 << format);
}
struct wl_shm_listener shm_listener = {
shm_handle_format
};
static void
registry_handle_global(void *data, struct wl_registry *registry,
uint32_t id, const char *interface, uint32_t version)
{
struct shared_output *so = data;
if (strcmp(interface, "wl_compositor") == 0) {
so->parent.compositor =
wl_registry_bind(registry,
id, &wl_compositor_interface, 1);
} else if (strcmp(interface, "wl_output") == 0 && !so->parent.output) {
so->parent.output =
wl_registry_bind(registry,
id, &wl_output_interface, 1);
} else if (strcmp(interface, "wl_seat") == 0) {
ss_seat_create(so, id);
} else if (strcmp(interface, "wl_shm") == 0) {
so->parent.shm =
wl_registry_bind(registry,
id, &wl_shm_interface, 1);
wl_shm_add_listener(so->parent.shm, &shm_listener, so);
} else if (strcmp(interface, "zwp_fullscreen_shell_v1") == 0) {
so->parent.fshell =
wl_registry_bind(registry,
id,
&zwp_fullscreen_shell_v1_interface,
1);
}
}
static void
registry_handle_global_remove(void *data, struct wl_registry *registry,
uint32_t name)
{
}
static const struct wl_registry_listener registry_listener = {
registry_handle_global,
registry_handle_global_remove
};
static int
shared_output_handle_event(int fd, uint32_t mask, void *data)
{
struct shared_output *so = data;
int count = 0;
if ((mask & WL_EVENT_HANGUP) || (mask & WL_EVENT_ERROR)) {
shared_output_destroy(so);
return 0;
}
if (mask & WL_EVENT_READABLE)
count = wl_display_dispatch(so->parent.display);
if (mask & WL_EVENT_WRITABLE)
wl_display_flush(so->parent.display);
if (mask == 0) {
count = wl_display_dispatch_pending(so->parent.display);
wl_display_flush(so->parent.display);
}
return count;
}
static void
output_destroyed(struct wl_listener *l, void *data)
{
struct shared_output *so;
so = container_of(l, struct shared_output, output_destroyed);
shared_output_destroy(so);
}
static void
mode_feedback_ok(void *data, struct zwp_fullscreen_shell_mode_feedback_v1 *fb)
{
struct shared_output *so = data;
zwp_fullscreen_shell_mode_feedback_v1_destroy(so->parent.mode_feedback);
}
static void
mode_feedback_failed(void *data, struct zwp_fullscreen_shell_mode_feedback_v1 *fb)
{
struct shared_output *so = data;
zwp_fullscreen_shell_mode_feedback_v1_destroy(so->parent.mode_feedback);
weston_log("Screen share failed: present_surface_for_mode failed\n");
shared_output_destroy(so);
}
struct zwp_fullscreen_shell_mode_feedback_v1_listener mode_feedback_listener = {
mode_feedback_ok,
mode_feedback_failed,
mode_feedback_ok,
};
static void
shared_output_repainted(struct wl_listener *listener, void *data)
{
struct shared_output *so =
container_of(listener, struct shared_output, frame_listener);
pixman_region32_t damage;
struct ss_shm_buffer *sb;
int32_t x, y, width, height, stride;
int i, nrects, do_yflip;
pixman_box32_t *r;
uint32_t *cache_data;
/* Damage in output coordinates */
pixman_region32_init(&damage);
pixman_region32_intersect(&damage, &so->output->region,
&so->output->previous_damage);
pixman_region32_translate(&damage, -so->output->x, -so->output->y);
/* Apply damage to all buffers */
wl_list_for_each(sb, &so->shm.buffers, link)
pixman_region32_union(&sb->damage, &sb->damage, &damage);
/* Transform to buffer coordinates */
weston_transformed_region(so->output->width, so->output->height,
so->output->transform,
so->output->current_scale,
&damage, &damage);
width = so->output->current_mode->width;
height = so->output->current_mode->height;
stride = width;
if (!so->cache_image ||
pixman_image_get_width(so->cache_image) != width ||
pixman_image_get_height(so->cache_image) != height) {
if (so->cache_image)
pixman_image_unref(so->cache_image);
so->cache_image =
pixman_image_create_bits(PIXMAN_a8r8g8b8,
width, height, NULL,
stride);
if (!so->cache_image) {
shared_output_destroy(so);
return;
}
pixman_region32_fini(&damage);
pixman_region32_init_rect(&damage, 0, 0, width, height);
}
if (shared_output_ensure_tmp_data(so, &damage) < 0) {
shared_output_destroy(so);
return;
}
do_yflip = !!(so->output->compositor->capabilities & WESTON_CAP_CAPTURE_YFLIP);
cache_data = pixman_image_get_data(so->cache_image);
r = pixman_region32_rectangles(&damage, &nrects);
for (i = 0; i < nrects; ++i) {
x = r[i].x1;
y = r[i].y1;
width = r[i].x2 - r[i].x1;
height = r[i].y2 - r[i].y1;
if (do_yflip) {
so->output->compositor->renderer->read_pixels(
so->output, PIXMAN_a8r8g8b8, so->tmp_data,
x, so->output->current_mode->height - r[i].y2,
width, height);
pixman_blt(so->tmp_data, cache_data, -width, stride,
32, 32, 0, 1 - height, x, y, width, height);
} else {
so->output->compositor->renderer->read_pixels(
so->output, PIXMAN_a8r8g8b8, so->tmp_data,
x, y, width, height);
pixman_blt(so->tmp_data, cache_data, width, stride,
32, 32, 0, 0, x, y, width, height);
}
}
pixman_region32_fini(&damage);
so->cache_dirty = 1;
shared_output_update(so);
}
static struct shared_output *
shared_output_create(struct weston_output *output, int parent_fd)
{
struct shared_output *so;
struct wl_event_loop *loop;
struct ss_seat *seat, *tmp;
int epoll_fd;
so = zalloc(sizeof *so);
if (so == NULL)
goto err_close;
wl_list_init(&so->seat_list);
so->parent.display = wl_display_connect_to_fd(parent_fd);
if (!so->parent.display)
goto err_alloc;
so->parent.registry = wl_display_get_registry(so->parent.display);
if (!so->parent.registry)
goto err_display;
wl_registry_add_listener(so->parent.registry,
&registry_listener, so);
wl_display_roundtrip(so->parent.display);
if (so->parent.shm == NULL) {
weston_log("Screen share failed: No wl_shm found\n");
goto err_display;
}
if (so->parent.fshell == NULL) {
weston_log("Screen share failed: "
"Parent does not support wl_fullscreen_shell\n");
goto err_display;
}
if (so->parent.compositor == NULL) {
weston_log("Screen share failed: No wl_compositor found\n");
goto err_display;
}
/* Get SHM formats */
wl_display_roundtrip(so->parent.display);
if (!(so->parent.shm_formats & (1 << WL_SHM_FORMAT_XRGB8888))) {
weston_log("Screen share failed: "
"WL_SHM_FORMAT_XRGB8888 not available\n");
goto err_display;
}
so->parent.surface =
wl_compositor_create_surface(so->parent.compositor);
if (!so->parent.surface) {
weston_log("Screen share failed: %s\n", strerror(errno));
goto err_display;
}
so->parent.mode_feedback =
zwp_fullscreen_shell_v1_present_surface_for_mode(so->parent.fshell,
so->parent.surface,
so->parent.output,
output->current_mode->refresh);
if (!so->parent.mode_feedback) {
weston_log("Screen share failed: %s\n", strerror(errno));
goto err_display;
}
zwp_fullscreen_shell_mode_feedback_v1_add_listener(so->parent.mode_feedback,
&mode_feedback_listener,
so);
loop = wl_display_get_event_loop(output->compositor->wl_display);
epoll_fd = wl_display_get_fd(so->parent.display);
so->event_source =
wl_event_loop_add_fd(loop, epoll_fd, WL_EVENT_READABLE,
shared_output_handle_event, so);
if (!so->event_source) {
weston_log("Screen share failed: %s\n", strerror(errno));
goto err_display;
}
/* Ok, everything's created. We should be good to go */
wl_list_init(&so->shm.buffers);
wl_list_init(&so->shm.free_buffers);
so->output = output;
so->output_destroyed.notify = output_destroyed;
wl_signal_add(&so->output->destroy_signal, &so->output_destroyed);
so->frame_listener.notify = shared_output_repainted;
wl_signal_add(&output->frame_signal, &so->frame_listener);
output->disable_planes++;
weston_output_damage(output);
return so;
err_display:
wl_list_for_each_safe(seat, tmp, &so->seat_list, link)
ss_seat_destroy(seat);
wl_display_disconnect(so->parent.display);
err_alloc:
free(so);
err_close:
close(parent_fd);
return NULL;
}
static void
shared_output_destroy(struct shared_output *so)
{
struct ss_shm_buffer *buffer, *bnext;
so->output->disable_planes--;
wl_list_for_each_safe(buffer, bnext, &so->shm.buffers, link)
ss_shm_buffer_destroy(buffer);
wl_list_for_each_safe(buffer, bnext, &so->shm.free_buffers, free_link)
ss_shm_buffer_destroy(buffer);
wl_display_disconnect(so->parent.display);
wl_event_source_remove(so->event_source);
wl_list_remove(&so->output_destroyed.link);
wl_list_remove(&so->frame_listener.link);
pixman_image_unref(so->cache_image);
free(so->tmp_data);
free(so);
}
static struct shared_output *
weston_output_share(struct weston_output *output, const char* command)
{
int sv[2];
char str[32];
pid_t pid;
sigset_t allsigs;
char *const argv[] = {
"/bin/sh",
"-c",
(char*)command,
NULL
};
if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sv) < 0) {
weston_log("weston_output_share: socketpair failed: %s\n",
strerror(errno));
return NULL;
}
pid = fork();
if (pid == -1) {
close(sv[0]);
close(sv[1]);
weston_log("weston_output_share: fork failed: %s\n",
strerror(errno));
return NULL;
}
if (pid == 0) {
/* do not give our signal mask to the new process */
sigfillset(&allsigs);
sigprocmask(SIG_UNBLOCK, &allsigs, NULL);
/* Launch clients as the user. Do not launch clients with
* wrong euid. */
if (seteuid(getuid()) == -1) {
weston_log("weston_output_share: setuid failed: %s\n",
strerror(errno));
abort();
}
sv[1] = dup(sv[1]);
if (sv[1] == -1) {
weston_log("weston_output_share: dup failed: %s\n",
strerror(errno));
abort();
}
snprintf(str, sizeof str, "%d", sv[1]);
setenv("WAYLAND_SERVER_SOCKET", str, 1);
execv(argv[0], argv);
weston_log("weston_output_share: exec failed: %s\n",
strerror(errno));
abort();
} else {
close(sv[1]);
return shared_output_create(output, sv[0]);
}
return NULL;
}
static struct weston_output *
weston_output_find(struct weston_compositor *c, int32_t x, int32_t y)
{
struct weston_output *output;
wl_list_for_each(output, &c->output_list, link) {
if (x >= output->x && y >= output->y &&
x < output->x + output->width &&
y < output->y + output->height)
return output;
}
return NULL;
}
static void
share_output_binding(struct weston_keyboard *keyboard,
const struct timespec *time, uint32_t key, void *data)
{
struct weston_output *output;
struct weston_pointer *pointer;
struct screen_share *ss = data;
pointer = weston_seat_get_pointer(keyboard->seat);
if (!pointer) {
weston_log("Cannot pick output: Seat does not have pointer\n");
return;
}
output = weston_output_find(pointer->seat->compositor,
wl_fixed_to_int(pointer->x),
wl_fixed_to_int(pointer->y));
if (!output) {
weston_log("Cannot pick output: Pointer not on any output\n");
return;
}
weston_output_share(output, ss->command);
}
WL_EXPORT int
wet_module_init(struct weston_compositor *compositor,
int *argc, char *argv[])
{
struct screen_share *ss;
struct weston_config *config = wet_get_config(compositor);
struct weston_config_section *section;
ss = zalloc(sizeof *ss);
if (ss == NULL)
return -1;
ss->compositor = compositor;
section = weston_config_get_section(config, "screen-share", NULL, NULL);
weston_config_section_get_string(section, "command", &ss->command, "");
weston_compositor_add_key_binding(compositor, KEY_S,
MODIFIER_CTRL | MODIFIER_ALT,
share_output_binding, ss);
return 0;
}