source file of the GNU LilyPond music typesetter
- (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include <math.h>
#include "font-metric.hh"
#include "libc-extension.hh"
return s->expr ();
}
-LY_DEFINE (ly_stencil_get_extent, "ly:stencil-extent",
+LY_DEFINE (ly_stencil_extent, "ly:stencil-extent",
2, 0, 0, (SCM stil, SCM axis),
"Return a pair of numbers signifying the extent of @var{stil} in "
"@var{axis} direction (0 or 1 for x and y axis respectively).")
return scm_from_bool (s->is_empty ());
}
-LY_DEFINE (ly_stencil_origin, "ly:stencil-origin",
- 2, 0, 0, (SCM stil, SCM axis),
- "Return a pair of numbers signifying the origin @var{stil} in "
- "@var{axis} direction (0 or 1 for x and y axis respectively).")
-{
- Stencil *s = unsmob_stencil (stil);
- SCM_ASSERT_TYPE (s, stil, SCM_ARG1, __FUNCTION__, "stencil");
- SCM_ASSERT_TYPE (is_axis (axis), axis, SCM_ARG2, __FUNCTION__, "axis");
-
- return scm_from_double (s->origin ()[Axis (scm_to_int (axis))]);
-}
-
-LY_DEFINE (ly_stencil_moved_to_edge, "ly:stencil-moved-to-edge",
- 4, 2, 0, (SCM first, SCM axis, SCM direction, SCM second,
- SCM padding, SCM minimum),
- "Similar to @code{ly:stencil-combine-edge}, but returns "
- "@var{second} positioned to be next to @var{first}. ")
-{
- /*
- C&P from combine-at-edge.
- */
- Stencil *s1 = unsmob_stencil (first);
- Stencil *s2 = unsmob_stencil (second);
- Stencil first_stencil;
-
- SCM_ASSERT_TYPE (is_axis (axis), axis, SCM_ARG3, __FUNCTION__, "axis");
- SCM_ASSERT_TYPE (is_direction (direction), direction, SCM_ARG4, __FUNCTION__, "dir");
-
- Real p = 0.0;
- if (padding != SCM_UNDEFINED)
- {
- SCM_ASSERT_TYPE (scm_is_number (padding), padding, SCM_ARG5, __FUNCTION__, "number");
- p = scm_to_double (padding);
- }
- Real m = 0.0;
- if (minimum != SCM_UNDEFINED)
- {
- SCM_ASSERT_TYPE (scm_is_number (minimum), minimum, SCM_ARG6, __FUNCTION__, "number");
- m = scm_to_double (minimum);
- }
-
- if (s1)
- first_stencil = *s1;
-
- if (s2)
- return first_stencil.moved_to_edge (Axis (scm_to_int (axis)),
- Direction (scm_to_int (direction)),
- *s2, p, m).smobbed_copy ();
- else
- return Stencil ().smobbed_copy ();
-}
-
LY_DEFINE (ly_stencil_combine_at_edge, "ly:stencil-combine-at-edge",
4, 2, 0, (SCM first, SCM axis, SCM direction,
SCM second,
if (s2)
result.add_at_edge (Axis (scm_to_int (axis)),
- Direction (scm_to_int (direction)), *s2, p, m);
+ Direction (scm_to_int (direction)), *s2, p);
return result.smobbed_copy ();
}
SCM_VALIDATE_REST_ARGUMENT (args);
SCM expr = SCM_EOL;
- SCM *tail = &expr;
+ SCM *tail = &expr;
Box extent;
extent.set_empty ();
-
+
while (!SCM_NULLP (args))
{
Stencil *s = unsmob_stencil (scm_car (args));
if (!s)
SCM_ASSERT_TYPE (s, scm_car (args), SCM_ARGn, __FUNCTION__, "Stencil");
-
extent.unite (s->extent_box ());
*tail = scm_cons (s->expr (), SCM_EOL);
tail = SCM_CDRLOC (*tail);
}
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-tex.scm}.\n\n"
- "2: the vertical and horizontal extents of the object.\n\n")
+ " for example @file{scm/output-ps.scm}.\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 (is_number_pair (xext), xext, SCM_ARG2, __FUNCTION__, "number pair");
- SCM_ASSERT_TYPE (is_number_pair (yext), yext, SCM_ARG3, __FUNCTION__, "number pair");
+ SCM_ASSERT_TYPE (!scm_is_pair (expr)
+ || is_stencil_head (scm_car (expr)),
+ expr, SCM_ARG1, __FUNCTION__, "registered stencil expression");
+
- 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 ();
}
return find_expression_fonts (stil->expr ());
}
-
LY_DEFINE (ly_stencil_in_color, "ly:stencil-in-color",
4, 0, 0, (SCM stc, SCM r, SCM g, SCM b),
"Put @var{stc} in a different color.")
stil->expr ())).smobbed_copy ();
}
-
struct Stencil_interpret_arguments
{
SCM func;
4, 0, 0, (SCM expr, SCM func, SCM arg1, SCM offset),
"Parse EXPR, feed bits to FUNC with first arg ARG1")
{
- SCM_ASSERT_TYPE (ly_c_procedure_p (func), func, SCM_ARG1, __FUNCTION__,
+ SCM_ASSERT_TYPE (ly_is_procedure (func), func, SCM_ARG1, __FUNCTION__,
"procedure");
Stencil_interpret_arguments a;
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),
scm_to_double (blot)).smobbed_copy ();
}
+LY_DEFINE (ly_register_stencil_expression, "ly:register-stencil-expression",
+ 1, 0, 0,
+ (SCM symbol),
+ "Add @var{symbol} as head of a stencil expression")
+{
+ SCM_ASSERT_TYPE (scm_is_symbol (symbol), symbol,
+ SCM_ARG1, __FUNCTION__, "Symbol");
+ register_stencil_head (symbol);
+ return SCM_UNSPECIFIED;
+}
+
+LY_DEFINE (ly_all_stencil_expressions, "ly:all-stencil-expressions",
+ 0, 0, 0,
+ (),
+ "Return all symbols recognized as stencil expressions.")
+{
+ return all_stencil_heads ();
+}