C++ (Cpp) _cairo_xcb_connection_shm_get_image Examples

Example #1

File: cairo-xcb-surface.c Project: ghub/NVprSDK

static cairo_status_t
_get_shm_image (cairo_xcb_surface_t     *surface,
		cairo_image_surface_t  **image_out)
{
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
    cairo_image_surface_t *image;
    cairo_xcb_shm_info_t *shm_info;
    cairo_status_t status;

    status = _cairo_xcb_surface_create_shm_image (surface, &image, &shm_info);
    if (unlikely (status))
	return status;

    if (! surface->base.is_clear) {
	status = _cairo_xcb_connection_shm_get_image (surface->connection,
						      surface->drawable,
						      0, 0,
						      surface->width,
						      surface->height,
						      shm_info->shm,
						      shm_info->offset);
	if (unlikely (status))
	    return status;
    } else {
	memset (image->data, 0, image->stride * image->height);
    }

    *image_out = image;
    return CAIRO_STATUS_SUCCESS;
#else
    return CAIRO_INT_STATUS_UNSUPPORTED;
#endif
}

Example #2

File: cairo-xcb-surface.c Project: mrobinson/cairo

static cairo_surface_t *
_get_shm_image (cairo_xcb_surface_t *surface,
		int x, int y,
		int width, int height)
{
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
    cairo_xcb_shm_info_t *shm_info;
    cairo_surface_t *image;
    cairo_status_t status;

    if ((surface->connection->flags & CAIRO_XCB_HAS_SHM) == 0)
	return NULL;

    image = _cairo_xcb_surface_create_shm_image (surface->connection,
						 surface->pixman_format,
						 width, height,
						 TRUE,
						 &shm_info);
    if (unlikely (image == NULL || image->status))
	goto done;

    status = _cairo_xcb_connection_shm_get_image (surface->connection,
						  surface->drawable,
						  x, y,
						  width, height,
						  shm_info->shm,
						  shm_info->offset);
    if (unlikely (status)) {
	cairo_surface_destroy (image);
	image = _cairo_surface_create_in_error (status);
    }

done:
    return image;
#else
    return NULL;
#endif
}