uint32_t
_cairo_xcb_connection_shm_attach (cairo_xcb_connection_t *connection,
uint32_t id,
cairo_bool_t readonly)
{
uint32_t segment = _cairo_xcb_connection_get_xid (connection);
assert (connection->flags & CAIRO_XCB_HAS_SHM);
xcb_shm_attach (connection->xcb_connection, segment, id, readonly);
return segment;
}
BufferGuard X11BufferSurface::buffer()
{
if(active_)
throw std::logic_error("ny::X11BufferSurface::buffer: there is already a BufferGuard");
//check if resize is needed
auto size = windowContext().size();
auto bpp = imageDataFormatSize(format_); //bytes per pixel (XXX NOT bits!)
auto newBytes = size.x * size.y * bpp; //the needed size
if(newBytes > byteSize_)
{
//we alloc more than is really needed because this will
//speed up (especially the shm version) resizes. We don't have to reallocated
//every time the window is resized and redrawn for the cost of higher memory
//consumption
byteSize_ = newBytes * 4;
if(shm_)
{
if(shmseg_)
{
xcb_shm_detach(&xConnection(), shmseg_);
shmdt(data_);
shmctl(shmid_, IPC_RMID, 0);
}
else
{
shmseg_ = xcb_generate_id(&xConnection());
}
shmid_ = shmget(IPC_PRIVATE, byteSize_, IPC_CREAT | 0777);
data_ = static_cast<uint8_t*>(shmat(shmid_, 0, 0));
shmseg_ = xcb_generate_id(&xConnection());
xcb_shm_attach(&xConnection(), shmseg_, shmid_, 0);
}
else
{
ownedBuffer_ = std::make_unique<uint8_t[]>(byteSize_);
data_ = ownedBuffer_.get();
}
}
size_ = size;
active_ = true;
return {*this, {data_, {size_.x, size_.y}, format_, size_.x * bpp}};
}
void ZLEwlViewWidget::resize(int w, int h) {
if(w == this->w && h == this->h)
return;
this->w = w;
this->h = h;
xcb_shm_detach(connection, shminfo.shmseg);
shmdt(im->data);
xcb_image_destroy(im);
xcb_shm_query_version_reply_t *rep_shm;
rep_shm = xcb_shm_query_version_reply (connection,
xcb_shm_query_version (connection),
NULL);
if(rep_shm) {
xcb_image_format_t format;
int shmctl_status;
if (rep_shm->shared_pixmaps &&
(rep_shm->major_version > 1 || rep_shm->minor_version > 0))
format = (xcb_image_format_t)rep_shm->pixmap_format;
else
format = (xcb_image_format_t)0;
uint8_t depth = xcb_aux_get_depth (connection, screen);
im = xcb_image_create_native (connection, w, h,
format, depth, NULL, ~0, NULL);
assert(im);
shminfo.shmid = shmget (IPC_PRIVATE,
im->stride*im->height,
IPC_CREAT | 0777);
assert(shminfo.shmid != -1);
shminfo.shmaddr = (uint8_t*)shmat (shminfo.shmid, 0, 0);
assert(shminfo.shmaddr);
im->data = shminfo.shmaddr;
shminfo.shmseg = xcb_generate_id (connection);
xcb_shm_attach (connection, shminfo.shmseg,
shminfo.shmid, 0);
shmctl_status = shmctl(shminfo.shmid, IPC_RMID, 0);
assert(shmctl_status != -1);
free (rep_shm);
}
}
ZLEwlViewWidget::ZLEwlViewWidget(ZLApplication *application, ZLView::Angle initialAngle) : ZLViewWidget(initialAngle) {
myApplication = application;
w = 600;
h = 800;
xcb_screen_iterator_t screen_iter;
const xcb_setup_t *setup;
xcb_generic_event_t *e;
xcb_generic_error_t *error;
xcb_void_cookie_t cookie_window;
xcb_void_cookie_t cookie_map;
uint32_t mask;
uint32_t values[2];
int screen_number;
uint8_t is_hand = 0;
xcb_rectangle_t rect_coord = { 0, 0, 600, 800};
/* getting the connection */
connection = xcb_connect (NULL, &screen_number);
if (xcb_connection_has_error(connection)) {
fprintf (stderr, "ERROR: can't connect to an X server\n");
exit(-1);
}
screen = xcb_aux_get_screen (connection, screen_number);
gc = xcb_generate_id (connection);
mask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES;
values[0] = screen->black_pixel;
values[1] = 0; /* no graphics exposures */
xcb_create_gc (connection, gc, screen->root, mask, values);
bgcolor = xcb_generate_id (connection);
mask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES;
values[0] = screen->white_pixel;
values[1] = 0; /* no graphics exposures */
xcb_create_gc (connection, bgcolor, screen->root, mask, values);
/* creating the window */
window = xcb_generate_id(connection);
mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
values[0] = screen->white_pixel;
values[1] =
XCB_EVENT_MASK_KEY_PRESS | XCB_EVENT_MASK_KEY_RELEASE |
XCB_EVENT_MASK_BUTTON_PRESS |
XCB_EVENT_MASK_EXPOSURE |
XCB_EVENT_MASK_POINTER_MOTION |
XCB_EVENT_MASK_VISIBILITY_CHANGE | XCB_EVENT_MASK_STRUCTURE_NOTIFY |
XCB_EVENT_MASK_FOCUS_CHANGE | XCB_EVENT_MASK_PROPERTY_CHANGE;
uint8_t depth = xcb_aux_get_depth (connection, screen);
xcb_create_window(connection,
depth,
window, screen->root,
0, 0, 600, 800,
0, XCB_WINDOW_CLASS_INPUT_OUTPUT,
screen->root_visual,
mask, values);
rect = xcb_generate_id (connection);
xcb_create_pixmap (connection, depth,
rect, window,
600, 800);
xcb_map_window(connection, window);
xcb_colormap_t colormap;
colormap = screen->default_colormap;
xcb_alloc_color_reply_t *rep;
rep = xcb_alloc_color_reply (connection, xcb_alloc_color (connection, colormap, 0, 0, 0), NULL);
pal_[0] = rep->pixel;
free(rep);
rep = xcb_alloc_color_reply (connection, xcb_alloc_color (connection, colormap, 0x55<<8, 0x55<<8, 0x55<<8), NULL);
pal_[1] = rep->pixel;
free(rep);
rep = xcb_alloc_color_reply (connection, xcb_alloc_color (connection, colormap, 0xaa<<8, 0xaa<<8, 0xaa<<8), NULL);
pal_[2] = rep->pixel;
free(rep);
rep = xcb_alloc_color_reply (connection, xcb_alloc_color (connection, colormap, 0xff<<8, 0xff<<8, 0xff<<8), NULL);
pal_[3] = rep->pixel;
free(rep);
pal = pal_;
xcb_shm_query_version_reply_t *rep_shm;
rep_shm = xcb_shm_query_version_reply (connection,
xcb_shm_query_version (connection),
NULL);
if(rep_shm) {
xcb_image_format_t format;
int shmctl_status;
if (rep_shm->shared_pixmaps &&
(rep_shm->major_version > 1 || rep_shm->minor_version > 0))
format = (xcb_image_format_t)rep_shm->pixmap_format;
else
format = (xcb_image_format_t)0;
im = xcb_image_create_native (connection, 600, 800,
format, depth, NULL, ~0, NULL);
assert(im);
shminfo.shmid = shmget (IPC_PRIVATE,
im->stride*im->height,
IPC_CREAT | 0777);
assert(shminfo.shmid != -1);
shminfo.shmaddr = (uint8_t*)shmat (shminfo.shmid, 0, 0);
assert(shminfo.shmaddr);
im->data = shminfo.shmaddr;
shminfo.shmseg = xcb_generate_id (connection);
xcb_shm_attach (connection, shminfo.shmseg,
shminfo.shmid, 0);
shmctl_status = shmctl(shminfo.shmid, IPC_RMID, 0);
assert(shmctl_status != -1);
free (rep_shm);
}
xcb_flush(connection);
}
void krad_x11_enable_capture (krad_x11_t *x11, uint32_t window_id) {
xcb_get_geometry_reply_t *geo;
xcb_query_tree_reply_t *tree;
xcb_translate_coordinates_cookie_t translateCookie;
xcb_translate_coordinates_reply_t *trans;
geo = xcb_get_geometry_reply (x11->connection,
xcb_get_geometry (x11->connection, window_id), NULL);
if (geo == NULL) {
window_id = 0;
} else {
tree = xcb_query_tree_reply (x11->connection,
xcb_query_tree (x11->connection, window_id), NULL);
if (tree == NULL) {
window_id = 0;
free (geo);
} else {
translateCookie = xcb_translate_coordinates (x11->connection,
window_id,
x11->screen->root,
geo->x, geo->y);
trans = xcb_translate_coordinates_reply (x11->connection,
translateCookie,
NULL);
if (trans == NULL) {
window_id = 0;
free (tree);
free (geo);
} else {
x11->width = geo->width;
x11->height = geo->height;
x11->x = trans->dst_x - geo->x;
x11->y = trans->dst_y - geo->y;
free (trans);
free (tree);
free (geo);
}
}
}
if (window_id == 0) {
x11->width = x11->screen_width;
x11->height = x11->screen_height;
x11->window = x11->screen->root;
}
//printf ("capture width %d height %d x %d y %d\n",
// x11->width, x11->height, x11->x, x11->y);
x11->img = xcb_image_create_native (x11->connection,
x11->width, x11->height,
XCB_IMAGE_FORMAT_Z_PIXMAP,
x11->screen_bit_depth, 0, ~0, 0);
if (!x11->img) {
exit (15);
}
x11->stride = x11->img->stride;
x11->shminfo.shmid = shmget (IPC_PRIVATE,
x11->img->stride * x11->img->height,
(IPC_CREAT | 0666));
if (x11->shminfo.shmid == (uint32_t)-1) {
xcb_image_destroy (x11->img);
failfast ("shminfo fail");
}
x11->shminfo.shmaddr = shmat (x11->shminfo.shmid, 0, 0);
x11->img->data = x11->shminfo.shmaddr;
if (x11->img->data == (uint8_t *)-1) {
xcb_image_destroy (x11->img);
failfast ("xcb image fail");
}
x11->shminfo.shmseg = xcb_generate_id (x11->connection);
xcb_shm_attach (x11->connection, x11->shminfo.shmseg, x11->shminfo.shmid, 0);
x11->capture_enabled = 1;
}
/**
* Processing callback
*/
static void Demux (void *opaque)
{
demux_t *demux = opaque;
demux_sys_t *sys = demux->p_sys;
xcb_connection_t *conn = sys->conn;
/* Determine capture region */
xcb_get_geometry_cookie_t gc;
xcb_query_pointer_cookie_t qc;
gc = xcb_get_geometry (conn, sys->window);
if (sys->follow_mouse)
qc = xcb_query_pointer (conn, sys->window);
xcb_get_geometry_reply_t *geo = xcb_get_geometry_reply (conn, gc, NULL);
if (geo == NULL)
{
msg_Err (demux, "bad X11 drawable 0x%08"PRIx32, sys->window);
discard:
if (sys->follow_mouse)
xcb_discard_reply (conn, gc.sequence);
return;
}
int w = sys->w;
int h = sys->h;
int x, y;
if (sys->follow_mouse)
{
xcb_query_pointer_reply_t *ptr =
xcb_query_pointer_reply (conn, qc, NULL);
if (ptr == NULL)
{
free (geo);
return;
}
if (w == 0 || w > geo->width)
w = geo->width;
x = ptr->win_x;
if (x < w / 2)
x = 0;
else if (x >= (int)geo->width - (w / 2))
x = geo->width - w;
else
x -= w / 2;
if (h == 0 || h > geo->height)
h = geo->height;
y = ptr->win_y;
if (y < h / 2)
y = 0;
else if (y >= (int)geo->height - (h / 2))
y = geo->height - h;
else
y -= h / 2;
}
else
{
int max;
x = sys->x;
max = (int)geo->width - x;
if (max <= 0)
goto discard;
if (w == 0 || w > max)
w = max;
y = sys->y;
max = (int)geo->height - y;
if (max <= 0)
goto discard;
if (h == 0 || h > max)
h = max;
}
/* Update elementary stream format (if needed) */
if (w != sys->cur_w || h != sys->cur_h)
{
if (sys->es != NULL)
es_out_Del (demux->out, sys->es);
/* Update composite pixmap */
if (sys->window != geo->root)
{
xcb_free_pixmap (conn, sys->pixmap); /* no-op first time */
xcb_composite_name_window_pixmap (conn, sys->window, sys->pixmap);
xcb_create_pixmap (conn, geo->depth, sys->pixmap,
geo->root, geo->width, geo->height);
}
sys->es = InitES (demux, w, h, geo->depth, &sys->bpp);
if (sys->es != NULL)
{
sys->cur_w = w;
sys->cur_h = h;
sys->bpp /= 8; /* bits -> bytes */
}
}
/* Capture screen */
xcb_drawable_t drawable =
(sys->window != geo->root) ? sys->pixmap : sys->window;
free (geo);
block_t *block = NULL;
#if HAVE_SYS_SHM_H
if (sys->shm)
{ /* Capture screen through shared memory */
size_t size = w * h * sys->bpp;
int id = shmget (IPC_PRIVATE, size, IPC_CREAT | 0777);
if (id == -1) /* XXX: fallback */
{
msg_Err (demux, "shared memory allocation error: %m");
goto noshm;
}
/* Attach the segment to X and capture */
xcb_shm_get_image_reply_t *img;
xcb_shm_get_image_cookie_t ck;
xcb_shm_attach (conn, sys->segment, id, 0 /* read/write */);
ck = xcb_shm_get_image (conn, drawable, x, y, w, h, ~0,
XCB_IMAGE_FORMAT_Z_PIXMAP, sys->segment, 0);
xcb_shm_detach (conn, sys->segment);
img = xcb_shm_get_image_reply (conn, ck, NULL);
xcb_flush (conn); /* ensure eventual detach */
if (img == NULL)
{
shmctl (id, IPC_RMID, 0);
goto noshm;
}
free (img);
/* Attach the segment to VLC */
void *shm = shmat (id, NULL, 0 /* read/write */);
shmctl (id, IPC_RMID, 0);
if (-1 == (intptr_t)shm)
{
msg_Err (demux, "shared memory attachment error: %m");
return;
}
block = block_shm_Alloc (shm, size);
if (unlikely(block == NULL))
shmdt (shm);
}
noshm:
#endif
if (block == NULL)
{ /* Capture screen through socket (fallback) */
xcb_get_image_reply_t *img;
img = xcb_get_image_reply (conn,
xcb_get_image (conn, XCB_IMAGE_FORMAT_Z_PIXMAP, drawable,
x, y, w, h, ~0), NULL);
if (img == NULL)
return;
uint8_t *data = xcb_get_image_data (img);
size_t datalen = xcb_get_image_data_length (img);
block = block_heap_Alloc (img, data + datalen - (uint8_t *)img);
if (block == NULL)
return;
block->p_buffer = data;
block->i_buffer = datalen;
}
/* Send block - zero copy */
if (sys->es != NULL)
{
block->i_pts = block->i_dts = mdate ();
es_out_Control (demux->out, ES_OUT_SET_PCR, block->i_pts);
es_out_Send (demux->out, sys->es, block);
}
}