/*
- stencil.cc -- implement Stencil
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-*/
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-#include <math.h>
-#include <libc-extension.hh> // isinf
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
-#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];
}
-Offset
-Stencil::origin () const
+bool
+Stencil::is_empty () const
+{
+ return (expr_ == SCM_EOL
+ || dim_[X_AXIS].is_empty ()
+ || dim_[Y_AXIS].is_empty ());
+}
+
+SCM
+Stencil::expr () const
+{
+ return expr_;
+}
+
+Box
+Stencil::extent_box () const
+{
+ return dim_;
+}
+
+void
+Stencil::rotate (Real a, Offset off)
+{
+ rotate_degrees (a * 180/M_PI, off);
+}
+
+/*
+ Rotate this stencil around the point ABSOLUTE_OFF.
+
+ */
+void
+Stencil::rotate_degrees_absolute (Real a, Offset absolute_off)
+{
+ const Real x = absolute_off[X_AXIS];
+ const Real y = absolute_off[Y_AXIS];
+
+ /*
+ * Build scheme expression (processed in stencil-interpret.cc)
+ */
+ /* TODO: by hanwenn 2008/09/10 14:38:56:
+ * in effect, this copies the underlying expression. It might be a
+ * little bit nicer to mirror this in the api, ie. make a
+ * Stencil::rotated()
+ * and have Stencil::rotate be an abbrev of
+ * *this = rotated()
+ */
+
+ 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
+ */
+ Box shifted_box = extent_box ();
+ shifted_box.translate (-absolute_off);
+
+ vector<Offset> pts;
+ pts.push_back (Offset (shifted_box.x ().at(LEFT), shifted_box.y ().at(DOWN)));
+ pts.push_back (Offset (shifted_box.x ().at(RIGHT), shifted_box.y ().at(DOWN)));
+ pts.push_back (Offset (shifted_box.x ().at(RIGHT), shifted_box.y ().at(UP)));
+ pts.push_back (Offset (shifted_box.x ().at(LEFT), shifted_box.y ().at(UP)));
+
+ 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 + absolute_off);
+}
+
+/*
+ Rotate this stencil around the point RELATIVE_OFF.
+
+ RELATIVE_OFF is measured in terms of the extent of the stencil, so
+ -1 = LEFT/DOWN edge, 1 = RIGHT/UP edge.
+ */
+void
+Stencil::rotate_degrees (Real a, Offset relative_off)
{
- return origin_;
+ /*
+ * Calculate the center of rotation
+ */
+ const Real x = extent (X_AXIS).linear_combination (relative_off[X_AXIS]);
+ const Real y = extent (Y_AXIS).linear_combination (relative_off[Y_AXIS]);
+ rotate_degrees_absolute (a, Offset (x, y));
}
void
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);
}
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);
}
}
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);
}
-/* FIXME: unintuitive naming, you would expect *this to be moved.
- Kept (keeping?) API for compat with add_at_edge (). */
-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 my_extent = dim_[a];
Interval i (s.extent (a));
Real his_extent;
if (i.is_empty ())
{
- programming_error ("Stencil::moved_to_edge: adding empty stencil.");
+ programming_error ("Stencil::add_at_edge: adding empty stencil.");
his_extent = 0.0;
}
else
his_extent = i[-d];
- Real offset = (my_extent. is_empty () ? 0.0 : my_extent[d] - his_extent)
+ Real offset = (my_extent.is_empty () ? 0.0 : my_extent[d] - his_extent)
+ 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));
-}
-
-/* Hmm... maybe this is not such a good idea ; stuff can be empty,
- while expr_ == '() */
-bool
-Stencil::is_empty () const
-{
- return expr_ == SCM_EOL;
+ toadd.translate_axis (offset, a);
+ add_stencil (toadd);
}
-SCM
-Stencil::get_expr () const
+Stencil
+Stencil::in_color (Real r, Real g, Real b) const
{
- return expr_;
+ 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;
}
-Box
-Stencil::extent_box () const
+/* convenience */
+Stencil
+Stencil::translated (Offset z) const
{
- return dim_;
+ Stencil s (*this);
+ s.translate (z);
+ return s;
}