source file of the GNU LilyPond music typesetter
- (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include <math.h>
-#include <libc-extension.hh> // isinf
-
-#include "font-metric.hh"
-#include "dimensions.hh"
-#include "interval.hh"
-#include "string.hh"
#include "stencil.hh"
+
+#include "main.hh"
+#include "font-metric.hh"
+#include "input.hh"
+#include "string-convert.hh"
#include "warn.hh"
#include "ly-smobs.icc"
SCM
Stencil::mark_smob (SCM smob)
{
- Stencil *s = (Stencil*) ly_cdr (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 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
Stencil::translate (Offset o)
{
Axis a = X_AXIS;
while (a < NO_AXES)
{
- if (abs (o[a]) > 100 CM
- || isinf (o[a]) || isnan (o[a]))
+ if (isinf (o[a])
+ || isnan (o[a])
+
+ // ugh, hardcoded.
+ || fabs (o[a]) > 1e6)
{
- programming_error ("Improbable offset for translation: setting to zero");
- o[a] = 0.0;
+ programming_error (String_convert::form_string ("Improbable offset for stencil: %f staff space", o[a])
+ + "\n"
+ + "Setting to zero.");
+ o[a] = 0.0;
+ if (strict_infinity_checking)
+ scm_misc_error (__FUNCTION__, "Improbable offset.", SCM_EOL);
}
incr (a);
}
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);
}
}
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);
}
}
Stencil::align_to (Axis a, Real x)
{
if (is_empty ())
- return ;
+ return;
Interval i (extent (a));
translate_axis (-i.linear_combination (x), a);
+ d * padding;
Stencil toadd (s);
- toadd.translate_axis (offset,a);
+ 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);
+ toadd.translate_axis (-toadd.origin ()[a]
+ + origin ()[a] + d * minimum, a);
return toadd;
}
{
add_stencil (moved_to_edge (a, d, s, padding, minimum));
}
+
+Stencil
+Stencil::in_color (Real r, Real g, Real b) const
+{
+ 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;
+}