source file of the GNU LilyPond music typesetter
- (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2008 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 "warn.hh"
+#include "main.hh"
+#include "font-metric.hh"
+#include "input.hh"
+#include "string-convert.hh"
+#include "warn.hh"
#include "ly-smobs.icc"
+Stencil::Stencil ()
+{
+ expr_ = SCM_EOL;
+ set_empty (true);
+}
-SCM
-Stencil::smobbed_copy () const
+Stencil::Stencil (Box b, SCM func)
+{
+ expr_ = func;
+ dim_ = b;
+}
+
+int
+Stencil::print_smob (SCM, SCM port, scm_print_state *)
{
- Stencil * m = new Stencil (*this);
+ scm_puts ("#<Stencil ", port);
+ scm_puts (" >", port);
+ return 1;
+}
- return m->smobbed_self ();
+SCM
+Stencil::mark_smob (SCM smob)
+{
+ Stencil *s = (Stencil *) SCM_CELL_WORD_1 (smob);
+ return s->expr_;
}
+IMPLEMENT_SIMPLE_SMOBS (Stencil);
+IMPLEMENT_TYPE_P (Stencil, "ly:stencil?");
+IMPLEMENT_DEFAULT_EQUAL_P (Stencil);
+
Interval
Stencil::extent (Axis a) const
{
return dim_[a];
}
-Stencil::Stencil (Box b, SCM func)
+bool
+Stencil::is_empty () const
{
- expr_ = func;
- dim_ = b;
+ return (expr_ == SCM_EOL
+ || dim_[X_AXIS].is_empty ()
+ || dim_[Y_AXIS].is_empty ());
}
-Stencil::Stencil ()
+SCM
+Stencil::expr () const
{
- expr_ = SCM_EOL;
- set_empty (true);
+ 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)
+{
+ /*
+ * 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_list_n (ly_symbol2scm ("translate-stencil"),
- ly_offset2scm (o),
- expr_, SCM_UNDEFINED);
+ ly_offset2scm (o),
+ expr_, SCM_UNDEFINED);
if (!is_empty ())
dim_.translate (o);
}
-
void
-Stencil::translate_axis (Real x,Axis a)
+Stencil::translate_axis (Real x, Axis a)
{
- Offset o (0,0);
+ Offset o (0, 0);
o[a] = x;
translate (o);
-}
-
-
+}
void
-Stencil::add_stencil (Stencil const &m)
+Stencil::add_stencil (Stencil const &s)
{
- expr_ = scm_list_n (ly_symbol2scm ("combine-stencil"),
- m.expr_,
- expr_, SCM_UNDEFINED);
- dim_.unite (m.dim_);
+ expr_ = scm_list_3 (ly_symbol2scm ("combine-stencil"), s.expr_, expr_);
+ dim_.unite (s.dim_);
}
void
}
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);
}
}
-
void
Stencil::align_to (Axis a, Real x)
{
if (is_empty ())
- return ;
+ return;
Interval i (extent (a));
translate_axis (-i.linear_combination (x), a);
}
-/*
- See scheme Function.
- */
+/* See scheme Function. */
void
-Stencil::add_at_edge (Axis a, Direction d, Stencil const &m, Real padding,
- Real minimum)
+Stencil::add_at_edge (Axis a, Direction d, Stencil const &s, Real padding)
{
- Real my_extent= is_empty () ? 0.0 : dim_[a][d];
- Interval i (m.extent (a));
+ Interval my_extent = dim_[a];
+ Interval i (s.extent (a));
Real his_extent;
if (i.is_empty ())
{
his_extent = 0.0;
}
else
- his_extent = i[-d];
+ his_extent = i[-d];
- Real offset = (my_extent - his_extent) + d*padding;
- if (minimum > 0 && fabs (offset) < minimum)
- offset = sign (offset) * minimum;
-
- Stencil toadd (m);
+ Real offset = (my_extent.is_empty () ? 0.0 : my_extent[d] - his_extent)
+ + d * padding;
+
+ Stencil toadd (s);
toadd.translate_axis (offset, a);
add_stencil (toadd);
}
-
-
-/*
- Hmm... maybe this is not such a good idea ; stuff can be empty,
- while expr_ == '()
- */
-bool
-Stencil::is_empty () const
-{
- return expr_ == SCM_EOL;
-}
-
-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;
}
-IMPLEMENT_SIMPLE_SMOBS (Stencil);
-
-
-int
-Stencil::print_smob (SCM , SCM port, scm_print_state *)
-{
- scm_puts ("#<Stencil ", port);
- scm_puts (" >", port);
-
- return 1;
-}
-
-
-SCM
-Stencil::mark_smob (SCM s)
-{
- Stencil *r = (Stencil *) ly_cdr (s);
-
- return r->expr_;
-}
-
-IMPLEMENT_TYPE_P (Stencil, "ly:stencil?");
-IMPLEMENT_DEFAULT_EQUAL_P (Stencil);
-
projects / lilypond.git / blobdiff