source file of the GNU LilyPond music typesetter
- (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include <cmath>
-using namespace std;
#include "font-metric.hh"
#include "libc-extension.hh"
}
LY_DEFINE (ly_make_stencil, "ly:make-stencil",
- 3, 0, 0, (SCM expr, SCM xext, SCM yext),
+ 1, 2, 0, (SCM expr, SCM xext, SCM yext),
" \n"
"Stencils are a device independent output expressions."
"They carry two pieces of information: \n\n"
"1: a specification of how to print this object. "
"This specification is processed by the output backends, "
" for example @file{scm/output-ps.scm}.\n\n"
- "2: the vertical and horizontal extents of the object.\n\n")
+ "2: the vertical and horizontal extents of the object.\n\n"
+ "If the extents are unspecified, they are taken to be empty."
+ )
{
SCM_ASSERT_TYPE (!scm_is_pair (expr)
|| is_stencil_head (scm_car (expr)),
expr, SCM_ARG1, __FUNCTION__, "registered stencil expression");
- SCM_ASSERT_TYPE (is_number_pair (xext), xext, SCM_ARG2, __FUNCTION__, "number pair");
- SCM_ASSERT_TYPE (is_number_pair (yext), yext, SCM_ARG3, __FUNCTION__, "number pair");
- Box b (ly_scm2interval (xext), ly_scm2interval (yext));
+ Interval x;
+ if (xext != SCM_UNDEFINED)
+ {
+ SCM_ASSERT_TYPE (is_number_pair (xext), xext, SCM_ARG2, __FUNCTION__, "number pair");
+ x = ly_scm2interval (xext);
+ }
+
+ Interval y;
+ if (yext != SCM_UNDEFINED)
+ {
+ SCM_ASSERT_TYPE (is_number_pair (yext), yext, SCM_ARG3, __FUNCTION__, "number pair");
+ y = ly_scm2interval (yext);
+ }
+
+ Box b (x, y);
Stencil s (b, expr);
return s.smobbed_copy ();
}
0.95 * scm_to_double (t)).smobbed_copy ();
}
+LY_DEFINE (ly_rotate_stencil, "ly:stencil-rotate",
+ 4, 0, 0, (SCM stil, SCM angle, SCM x, SCM y),
+ "Return a @var{stil} rotated @var{angle} degrees around point (@var{x}, @var{y}).")
+{
+ Stencil *s = unsmob_stencil (stil);
+ SCM_ASSERT_TYPE (s, stil, SCM_ARG1, __FUNCTION__, "stencil");
+ SCM_ASSERT_TYPE (scm_is_number (angle), angle, SCM_ARG2, __FUNCTION__, "number");
+ SCM_ASSERT_TYPE (scm_is_number (x), x, SCM_ARG3, __FUNCTION__, "number");
+ SCM_ASSERT_TYPE (scm_is_number (y), y, SCM_ARG4, __FUNCTION__, "number");
+ Real a = scm_to_double (angle);
+ Real x_off = scm_to_double (x);
+ Real y_off = scm_to_double (y);
+
+ SCM new_s = s->smobbed_copy ();
+ Stencil *q = unsmob_stencil (new_s);
+ q->rotate (a, Offset (x_off, y_off));
+ return new_s;
+}
+
LY_DEFINE (ly_filled_box, "ly:round-filled-box",
3, 0, 0,
(SCM xext, SCM yext, SCM blot),