static cairo_status_t
_cairo_clip_intersect_rectangle (cairo_clip_t *clip,
const cairo_rectangle_int_t *rect)
{
cairo_clip_path_t *clip_path;
cairo_status_t status;
if (clip->path != NULL) {
if (rect->x <= clip->path->extents.x &&
rect->y <= clip->path->extents.y &&
rect->x + rect->width >= clip->path->extents.x + clip->path->extents.width &&
rect->y + rect->height >= clip->path->extents.y + clip->path->extents.height)
{
return CAIRO_STATUS_SUCCESS;
}
}
clip_path = _cairo_clip_path_create (clip);
if (unlikely (clip_path == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_path_fixed_init (&clip_path->path);
status = _cairo_path_fixed_move_to (&clip_path->path,
_cairo_fixed_from_int (rect->x),
_cairo_fixed_from_int (rect->y));
assert (status == CAIRO_STATUS_SUCCESS);
status = _cairo_path_fixed_rel_line_to (&clip_path->path,
_cairo_fixed_from_int (rect->width),
_cairo_fixed_from_int (0));
assert (status == CAIRO_STATUS_SUCCESS);
status = _cairo_path_fixed_rel_line_to (&clip_path->path,
_cairo_fixed_from_int (0),
_cairo_fixed_from_int (rect->height));
assert (status == CAIRO_STATUS_SUCCESS);
status = _cairo_path_fixed_rel_line_to (&clip_path->path,
_cairo_fixed_from_int (-rect->width),
_cairo_fixed_from_int (0));
assert (status == CAIRO_STATUS_SUCCESS);
status = _cairo_path_fixed_close_path (&clip_path->path);
assert (status == CAIRO_STATUS_SUCCESS);
clip_path->extents = *rect;
clip_path->fill_rule = CAIRO_FILL_RULE_WINDING;
clip_path->tolerance = 1;
clip_path->antialias = CAIRO_ANTIALIAS_NONE;
clip_path->flags |= CAIRO_CLIP_PATH_IS_BOX;
/* could preallocate the region if it proves worthwhile */
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_default_context_rel_line_to (void *abstract_cr, double dx, double dy)
{
cairo_default_context_t *cr = abstract_cr;
cairo_fixed_t dx_fixed, dy_fixed;
_cairo_gstate_user_to_backend_distance (cr->gstate, &dx, &dy);
dx_fixed = _cairo_fixed_from_double (dx);
dy_fixed = _cairo_fixed_from_double (dy);
return _cairo_path_fixed_rel_line_to (cr->path, dx_fixed, dy_fixed);
}
