source file of the GNU LilyPond music typesetter
- (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "stencil.hh"
-#include <math.h>
-
-#include <libc-extension.hh> // isinf
-
-#include "input-smob.hh"
+#include "main.hh"
#include "font-metric.hh"
-#include "dimensions.hh"
+#include "input.hh"
#include "string-convert.hh"
#include "warn.hh"
SCM
Stencil::mark_smob (SCM smob)
{
- Stencil *s = (Stencil*) SCM_CELL_WORD_1 (smob);
+ Stencil *s = (Stencil *) SCM_CELL_WORD_1 (smob);
return s->expr_;
}
return dim_[a];
}
-/* Hmm... maybe this is not such a good idea ; stuff can be empty,
- while expr_ == '() */
bool
Stencil::is_empty () const
{
- return expr_ == SCM_EOL;
+ return (expr_ == SCM_EOL
+ || dim_[X_AXIS].is_empty ()
+ || dim_[Y_AXIS].is_empty ());
}
SCM
{
return dim_;
}
-Offset
-Stencil::origin () const
-{
- return origin_;
+
+/*
+ * Rotate this stencil around the point [x, y]
+ */
+void
+Stencil::rotate (Real a, Offset off)
+{
+ const Real x_cen = extent (X_AXIS).center ();
+ const Real y_cen = extent (Y_AXIS).center ();
+
+ /*
+ * Calculate the center of rotation
+ */
+ const Real x = x_cen + off[X_AXIS] * x_cen;
+ const Real y = y_cen + off[Y_AXIS] * y_cen;
+
+ /*
+ * Build scheme expression (processed in stencil-interpret.cc)
+ */
+ expr_ = scm_list_n (ly_symbol2scm ("rotate-stencil"),
+ scm_list_2 (scm_from_double (a),
+ scm_cons (scm_from_double (x), scm_from_double (y))),
+ expr_, SCM_UNDEFINED);
+
+ /*
+ * Calculate the new bounding box
+ */
+ vector<Offset> pts;
+ pts.push_back (Offset (-x_cen, -y_cen));
+ pts.push_back (Offset (x_cen, -y_cen));
+ pts.push_back (Offset (x_cen, y_cen));
+ pts.push_back (Offset (-x_cen, y_cen));
+
+ const Offset rot = complex_exp (Offset (0, a * M_PI / 180.0));
+ dim_.set_empty ();
+ for (vsize i = 0; i < pts.size (); i++)
+ dim_.add_point (pts[i] * rot + Offset (x_cen, y_cen));
}
void
Axis a = X_AXIS;
while (a < NO_AXES)
{
- if (isinf (o[a]) || isnan (o[a]))
+ if (isinf (o[a])
+ || isnan (o[a])
+
+ // ugh, hardcoded.
+ || fabs (o[a]) > 1e6)
{
programming_error (String_convert::form_string ("Improbable offset for stencil: %f staff space", o[a])
+ "\n"
+ "Setting to zero.");
- o[a] = 0.0;
+ o[a] = 0.0;
+ if (strict_infinity_checking)
+ scm_misc_error (__FUNCTION__, "Improbable offset.", SCM_EOL);
}
incr (a);
}
expr_, SCM_UNDEFINED);
if (!is_empty ())
dim_.translate (o);
- origin_ += o;
}
void
Stencil::translate_axis (Real x, Axis a)
{
- Offset o (0,0);
+ Offset o (0, 0);
o[a] = x;
translate (o);
}
dim_.unite (s.dim_);
}
-
-
void
Stencil::set_empty (bool e)
{
}
else
{
- dim_[X_AXIS] = Interval (0,0);
- dim_[Y_AXIS] = Interval (0,0);
+ dim_[X_AXIS] = Interval (0, 0);
+ dim_[Y_AXIS] = Interval (0, 0);
}
}
translate_axis (-i.linear_combination (x), a);
}
-/* FIXME: unintuitive naming, you would expect *this to be moved.
- Kept (keeping?) API for compat with add_at_edge ().
-
- What is PADDING, what is MINIMUM, exactly? */
-Stencil
-Stencil::moved_to_edge (Axis a, Direction d, Stencil const &s,
- Real padding, Real minimum) const
+/* See scheme Function. */
+void
+Stencil::add_at_edge (Axis a, Direction d, Stencil const &s, Real padding)
{
Interval my_extent = dim_[a];
Interval i (s.extent (a));
{
programming_error ("Stencil::moved_to_edge: adding empty stencil.");
his_extent = 0.0;
- SCM_ASSERT_TYPE(0, SCM_EOL, SCM_ARG1, __FUNCTION__, "");
}
else
his_extent = i[-d];
+ d * padding;
Stencil toadd (s);
- toadd.translate_axis (offset,a);
-
- if (minimum > 0 && d * (-origin ()[a] + toadd.origin ()[a]) < minimum)
- toadd.translate_axis ( -toadd.origin ()[a]
- + origin ()[a] + d * minimum, a);
-
- return toadd;
-}
-
-/* See scheme Function. */
-void
-Stencil::add_at_edge (Axis a, Direction d, Stencil const &s, Real padding,
- Real minimum)
-{
- add_stencil (moved_to_edge (a, d, s, padding, minimum));
-}
-
-
-/****************************************************************/
-
-
-void
-interpret_stencil_expression (SCM expr,
- void (*func) (void*, SCM),
- void *func_arg,
- Offset o)
-{
- while (1)
- {
- if (!scm_is_pair (expr))
- return;
-
- SCM head = scm_car (expr);
-
- if (head == ly_symbol2scm ("translate-stencil"))
- {
- o += ly_scm2offset (scm_cadr (expr));
- expr = scm_caddr (expr);
- }
- else if (head == ly_symbol2scm ("combine-stencil"))
- {
- for (SCM x = scm_cdr (expr); scm_is_pair (x); x = scm_cdr (x))
- interpret_stencil_expression (scm_car (x), func, func_arg, o);
- return;
- }
- else if (head == ly_symbol2scm ("grob-cause"))
- {
- SCM grob = scm_cadr (expr);
-
- (*func) (func_arg, scm_list_2 (head, grob));
- interpret_stencil_expression (scm_caddr (expr), func, func_arg, o);
- (*func) (func_arg, scm_list_1 (ly_symbol2scm ("no-origin")));
- return;
- }
- else
- {
- (*func) (func_arg,
- scm_list_4 (ly_symbol2scm ("placebox"),
- scm_make_real (o[X_AXIS]),
- scm_make_real (o[Y_AXIS]),
- expr));
- return;
- }
- }
+ toadd.translate_axis (offset, a);
+ add_stencil (toadd);
}
-
-struct Font_list
-{
- SCM fonts_;
-};
-
-static void
-find_font_function (void *fs, SCM x)
+Stencil
+Stencil::in_color (Real r, Real g, Real b) const
{
- Font_list *me = (Font_list*) fs;
-
- if (scm_car (x) == ly_symbol2scm ("placebox"))
- {
- SCM args = scm_cdr (x);
- SCM what = scm_caddr (args);
-
- if (scm_is_pair (what))
- {
- SCM head = scm_car (what);
- if (ly_symbol2scm ("text") == head)
- me->fonts_ = scm_cons (scm_cadr (what), me->fonts_);
- else if (head == ly_symbol2scm ("char"))
- me->fonts_ = scm_cons (scm_cadr (what), me->fonts_);
- }
- }
+ Stencil new_stencil (extent_box (),
+ scm_list_3 (ly_symbol2scm ("color"),
+ scm_list_3 (scm_from_double (r),
+ scm_from_double (g),
+ scm_from_double (b)),
+ expr ()));
+ return new_stencil;
}
-SCM
-find_expression_fonts (SCM expr)
+/* convenience */
+Stencil
+Stencil::translated (Offset z) const
{
- Font_list fl;
-
- fl.fonts_ = SCM_EOL;
-
- interpret_stencil_expression (expr, &find_font_function,
- (void*) &fl, Offset (0,0));
-
- return fl.fonts_;
+ Stencil s (*this);
+ s.translate (z);
+ return s;
}
-
-