static cairo_xcb_pixmap_t *
_cairo_xcb_pixmap_create (cairo_xcb_surface_t *target,
int width, int height)
{
cairo_xcb_pixmap_t *surface;
surface = malloc (sizeof (cairo_xcb_pixmap_t));
if (unlikely (surface == NULL))
return (cairo_xcb_pixmap_t *)
_cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
_cairo_surface_init (&surface->base,
&_cairo_xcb_pixmap_backend,
NULL,
target->base.content);
surface->connection = target->connection;
surface->screen = target->screen;
surface->owner = NULL;
surface->width = width;
surface->height = height;
surface->depth = target->depth;
surface->x0 = surface->y0 = 0;
surface->repeat = FALSE;
surface->pixmap =
_cairo_xcb_connection_create_pixmap (surface->connection,
surface->depth,
target->drawable,
width, height);
return surface;
}
cairo_surface_t *
_cairo_xcb_surface_create_similar (void *abstract_other,
cairo_content_t content,
int width,
int height)
{
cairo_xcb_surface_t *other = abstract_other;
cairo_xcb_surface_t *surface;
cairo_xcb_connection_t *connection;
xcb_pixmap_t pixmap;
cairo_status_t status;
if (unlikely(width > XLIB_COORD_MAX ||
height > XLIB_COORD_MAX ||
width <= 0 ||
height <= 0))
return cairo_image_surface_create (_cairo_format_from_content (content),
width, height);
if ((other->connection->flags & CAIRO_XCB_HAS_RENDER) == 0)
return _cairo_xcb_surface_create_similar_image (other,
_cairo_format_from_content (content),
width, height);
connection = other->connection;
status = _cairo_xcb_connection_acquire (connection);
if (unlikely (status))
return _cairo_surface_create_in_error (status);
if (content == other->base.content) {
pixmap = _cairo_xcb_connection_create_pixmap (connection,
other->depth,
other->drawable,
width, height);
surface = (cairo_xcb_surface_t *)
_cairo_xcb_surface_create_internal (other->screen,
pixmap, TRUE,
other->pixman_format,
other->xrender_format,
width, height);
} else {
cairo_format_t format;
pixman_format_code_t pixman_format;
/* XXX find a compatible xrender format */
switch (content) {
case CAIRO_CONTENT_ALPHA:
pixman_format = PIXMAN_a8;
format = CAIRO_FORMAT_A8;
break;
case CAIRO_CONTENT_COLOR:
pixman_format = PIXMAN_x8r8g8b8;
format = CAIRO_FORMAT_RGB24;
break;
default:
ASSERT_NOT_REACHED;
case CAIRO_CONTENT_COLOR_ALPHA:
pixman_format = PIXMAN_a8r8g8b8;
format = CAIRO_FORMAT_ARGB32;
break;
}
pixmap = _cairo_xcb_connection_create_pixmap (connection,
PIXMAN_FORMAT_DEPTH (pixman_format),
other->drawable,
width, height);
surface = (cairo_xcb_surface_t *)
_cairo_xcb_surface_create_internal (other->screen,
pixmap, TRUE,
pixman_format,
connection->standard_formats[format],
width, height);
}
if (unlikely (surface->base.status))
_cairo_xcb_connection_free_pixmap (connection, pixmap);
_cairo_xcb_connection_release (connection);
return &surface->base;
}
static cairo_surface_t *
_get_image (cairo_xcb_surface_t *surface,
cairo_bool_t use_shm,
int x, int y,
int width, int height)
{
cairo_surface_t *image;
cairo_xcb_connection_t *connection;
xcb_get_image_reply_t *reply;
cairo_int_status_t status;
assert (surface->fallback == NULL);
assert (x >= 0);
assert (y >= 0);
assert (x + width <= surface->width);
assert (y + height <= surface->height);
if (surface->deferred_clear) {
image =
_cairo_image_surface_create_with_pixman_format (NULL,
surface->pixman_format,
width, height,
0);
if (surface->deferred_clear_color.alpha_short > 0x00ff) {
cairo_solid_pattern_t solid;
_cairo_pattern_init_solid (&solid, &surface->deferred_clear_color);
status = _cairo_surface_paint (image,
CAIRO_OPERATOR_SOURCE,
&solid.base,
NULL);
if (unlikely (status)) {
cairo_surface_destroy (image);
image = _cairo_surface_create_in_error (status);
}
}
return image;
}
connection = surface->connection;
status = _cairo_xcb_connection_acquire (connection);
if (unlikely (status))
return _cairo_surface_create_in_error (status);
if (use_shm) {
image = _get_shm_image (surface, x, y, width, height);
if (image) {
if (image->status) {
_cairo_xcb_connection_release (connection);
return image;
}
cairo_surface_destroy (image);
}
}
status = _cairo_xcb_connection_get_image (connection,
surface->drawable,
x, y,
width, height,
&reply);
if (unlikely (status))
goto FAIL;
if (reply == NULL && ! surface->owns_pixmap) {
/* xcb_get_image_t from a window is dangerous because it can
* produce errors if the window is unmapped or partially
* outside the screen. We could check for errors and
* retry, but to keep things simple, we just create a
* temporary pixmap
*
* If we hit this fallback too often, we should remember so and
* skip the round-trip from the above GetImage request,
* similar to what cairo-xlib does.
*/
xcb_pixmap_t pixmap;
xcb_gcontext_t gc;
gc = _cairo_xcb_screen_get_gc (surface->screen,
surface->drawable,
surface->depth);
pixmap = _cairo_xcb_connection_create_pixmap (connection,
surface->depth,
surface->drawable,
width, height);
/* XXX IncludeInferiors? */
_cairo_xcb_connection_copy_area (connection,
surface->drawable,
pixmap, gc,
x, y,
0, 0,
width, height);
_cairo_xcb_screen_put_gc (surface->screen, surface->depth, gc);
status = _cairo_xcb_connection_get_image (connection,
pixmap,
0, 0,
width, height,
&reply);
_cairo_xcb_connection_free_pixmap (connection, pixmap);
if (unlikely (status))
goto FAIL;
}
if (unlikely (reply == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL;
}
/* XXX byte swap */
/* XXX format conversion */
assert (reply->depth == surface->depth);
image = _cairo_image_surface_create_with_pixman_format
(xcb_get_image_data (reply),
surface->pixman_format,
width, height,
CAIRO_STRIDE_FOR_WIDTH_BPP (width,
PIXMAN_FORMAT_BPP (surface->pixman_format)));
status = image->status;
if (unlikely (status)) {
free (reply);
goto FAIL;
}
/* XXX */
pixman_image_set_destroy_function (((cairo_image_surface_t *)image)->pixman_image, _destroy_image, reply);
_cairo_xcb_connection_release (connection);
return image;
FAIL:
_cairo_xcb_connection_release (connection);
return _cairo_surface_create_in_error (status);
}
static cairo_status_t
_get_image (cairo_xcb_surface_t *surface,
cairo_bool_t use_shm,
cairo_image_surface_t **image_out)
{
cairo_image_surface_t *image;
cairo_xcb_connection_t *connection;
xcb_get_image_reply_t *reply;
cairo_status_t status;
if (surface->base.is_clear || surface->deferred_clear) {
image = (cairo_image_surface_t *)
_cairo_image_surface_create_with_pixman_format (NULL,
surface->pixman_format,
surface->width,
surface->height,
0);
*image_out = image;
return image->base.status;
}
connection = surface->connection;
status = _cairo_xcb_connection_acquire (connection);
if (unlikely (status))
return status;
status = _cairo_xcb_connection_take_socket (connection);
if (unlikely (status))
goto FAIL;
if (use_shm) {
status = _get_shm_image (surface, image_out);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
goto FAIL;
}
if (surface->use_pixmap == 0) {
status = _cairo_xcb_connection_get_image (connection,
surface->drawable,
0, 0,
surface->width,
surface->height,
&reply);
if (unlikely (status))
goto FAIL;
} else {
surface->use_pixmap--;
reply = NULL;
}
if (reply == NULL && ! surface->owns_pixmap) {
/* xcb_get_image_t from a window is dangerous because it can
* produce errors if the window is unmapped or partially
* outside the screen. We could check for errors and
* retry, but to keep things simple, we just create a
* temporary pixmap
*/
xcb_pixmap_t pixmap;
xcb_gcontext_t gc;
gc = _cairo_xcb_screen_get_gc (surface->screen,
surface->drawable,
surface->depth);
pixmap = _cairo_xcb_connection_create_pixmap (connection,
surface->depth,
surface->drawable,
surface->width,
surface->height);
/* XXX IncludeInferiors? */
_cairo_xcb_connection_copy_area (connection,
surface->drawable,
pixmap, gc,
0, 0,
0, 0,
surface->width,
surface->height);
_cairo_xcb_screen_put_gc (surface->screen, surface->depth, gc);
status = _cairo_xcb_connection_get_image (connection,
pixmap,
0, 0,
surface->width,
surface->height,
&reply);
_cairo_xcb_connection_free_pixmap (connection, pixmap);
if (unlikely (status))
goto FAIL;
}
if (unlikely (reply == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL;
}
/* XXX byte swap */
/* XXX format conversion */
assert (reply->depth == surface->depth);
image = (cairo_image_surface_t *)
_cairo_image_surface_create_with_pixman_format
(xcb_get_image_data (reply),
surface->pixman_format,
surface->width,
surface->height,
CAIRO_STRIDE_FOR_WIDTH_BPP (surface->width,
PIXMAN_FORMAT_BPP (surface->pixman_format)));
status = image->base.status;
if (unlikely (status)) {
free (reply);
goto FAIL;
}
assert (xcb_get_image_data_length (reply) == image->height * image->stride);
pixman_image_set_destroy_function (image->pixman_image, _destroy_image, reply);
_cairo_xcb_connection_release (connection);
/* synchronisation point */
surface->marked_dirty = FALSE;
*image_out = image;
return CAIRO_STATUS_SUCCESS;
FAIL:
_cairo_xcb_connection_release (connection);
return status;
}
