source file of the GNU LilyPond music typesetter
- (c) 2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 2006 Joe Neeman <joeneeman@gmail.com>
*/
#include "constrained-breaking.hh"
start_.size () different solution arrays. state_[i] is the array for the
solution starting at column number start_[i].
- The indicies "start" and "end" refer to the index in the start_ array of the
+ The indices "start" and "end" refer to the index in the start_ array of the
desired starting and ending columns.
each solution array looks like
bool found_something = false;
vsize start_col = starting_breakpoints_[start];
- vector<Constrained_break_node> &st = state_[start];
- vsize rank = breaks_.size () - start_col;
+ Matrix<Constrained_break_node> &st = state_[start];
vsize max_index = brk - start_col;
for (vsize j=sys; j < max_index; j++)
{
if (0 == sys && j > 0)
break; /* the first line cannot have its first break after the beginning */
- Line_details const &cur = lines_[(j + start_col)*lines_rank_ + brk];
+ Line_details const &cur = lines_.at (brk, j + start_col);
Real prev_f = 0;
Real prev_dem = 0;
if (sys > 0)
{
- prev_f = st[(sys-1) * rank + j].details_.force_;
- prev_dem = st[(sys-1) * rank + j].demerits_;
+ prev_f = st.at (j, sys-1).details_.force_;
+ prev_dem = st.at (j, sys-1).demerits_;
}
if (isinf (prev_dem))
break;
if (isinf (dem))
continue;
- int k = sys*rank + max_index;
- if (isinf (st[k].demerits_) || dem < st[k].demerits_)
+ Constrained_break_node &n = st.at (max_index, sys);
+ if (isinf (n.demerits_) || dem < n.demerits_)
{
found_something = true;
- st[k].demerits_ = dem;
- st[k].details_ = cur;
- st[k].prev_ = j;
+ n.demerits_ = dem;
+ n.details_ = cur;
+ n.prev_ = j;
}
}
return found_something;
Constrained_breaking::solve ()
{
if (!systems_)
- {
- programming_error (_f ("no system number set in constrained-breaking"));
- systems_ = breaks_.size () / 4;
- }
+ return get_best_solution (0, VPOS);
resize (systems_);
return get_solution(0, VPOS, systems_);
Interval other_lines = line_dimensions_int (pscore_->layout (), 1);
/* do all the rod/spring problems */
breaks_ = pscore_->find_break_indices ();
- lines_rank_ = breaks_.size ();
all_ = pscore_->root_system ()->columns ();
- lines_.resize (breaks_.size () * breaks_.size ());
+ lines_.resize (breaks_.size (), breaks_.size (), Line_details ());
vector<Real> forces = get_line_forces (all_,
breaks_,
other_lines.length (),
Interval extent = sys->pure_height (sys, start, end);
bool last = j == breaks_.size () - 1;
bool ragged = ragged_right || (last && ragged_last);
- int k = i*lines_rank_ + j;
- SCM pen = all_[breaks_[j]]->get_property ("line-break-penalty");
- if (scm_is_number (pen))
- lines_[k].break_penalty_ = scm_to_double (pen);
+ Line_details &line = lines_.at (j, i);
+
+ Grob *c = all_[breaks_[j]];
+ line.break_penalty_ = robust_scm2double (c->get_property ("line-break-penalty"), 0);
+ line.page_penalty_ = robust_scm2double (c->get_property ("page-break-penalty"), 0);
+ line.turn_penalty_ = robust_scm2double (c->get_property ("page-turn-penalty"), 0);
+ line.break_permission_ = c->get_property ("line-break-permission");
+ line.page_permission_ = c->get_property ("page-break-permission");
+ line.turn_permission_ = c->get_property ("page-turn-permission");
max_ext = max (max_ext, extent.length ());
- lines_[k].force_ = forces[k];
- lines_[k].extent_ = extent.length ();
- lines_[k].padding_ = padding;
- lines_[k].space_ = space;
- lines_[k].inverse_hooke_ = 1;
- if (ragged && lines_[k].force_ < 0)
- lines_[k].force_ = infinity_f;
- if (isinf (lines_[k].force_))
+ line.force_ = forces[i*breaks_.size () + j];
+ line.extent_ = extent;
+ line.padding_ = padding;
+ line.space_ = space;
+ line.inverse_hooke_ = 1;
+ if (ragged && line.force_ < 0)
+ line.force_ = infinity_f;
+ if (isinf (line.force_))
break;
}
}
if (pscore_ && systems_ > valid_systems_)
{
for (vsize i = 0; i < state_.size (); i++)
- state_[i].resize((breaks_.size () - starting_breakpoints_[i]) * systems_);
+ state_[i].resize (breaks_.size () - starting_breakpoints_[i], systems_, Constrained_break_node ());
/* fill out the matrices */
for (vsize i = 0; i < state_.size (); i++)
vector<Column_x_positions>
Constrained_breaking::get_solution (vsize start, vsize end, vsize sys_count)
{
- vsize rank;
- vsize end_brk;
vsize start_brk = starting_breakpoints_[start];
- prepare_solution (start, end, sys_count, &rank, &end_brk);
+ vsize end_brk = prepare_solution (start, end, sys_count);
- vector<Constrained_break_node> const &st = state_[start];
+ Matrix<Constrained_break_node> const &st = state_[start];
vector<Column_x_positions> ret;
/* find the first solution that satisfies constraints */
{
for (vsize brk = end_brk; brk != VPOS; brk--)
{
- if (!isinf (st[sys*rank + brk].details_.force_))
+ if (!isinf (st.at (brk, sys).details_.force_))
{
if (brk != end_brk)
{
/* build up the good solution */
for (vsize cur_sys = sys; cur_sys != VPOS; cur_sys--)
{
- vsize prev_brk = st[cur_sys*rank + brk].prev_;
+ vsize prev_brk = st.at (brk, cur_sys).prev_;
assert (brk != VPOS);
ret.push_back (space_line (prev_brk + start_brk, brk + start_brk));
brk = prev_brk;
return ret;
}
+vector<Column_x_positions>
+Constrained_breaking::get_best_solution (vsize start, vsize end)
+{
+ vsize min_systems = get_min_systems (start, end);
+ vsize max_systems = get_max_systems (start, end);
+ Real best_demerits = infinity_f;
+ vector<Column_x_positions> best_so_far;
+
+ for (vsize i = min_systems; i <= max_systems; i++)
+ {
+ vsize brk = prepare_solution (start, end, i);
+ Real dem = state_[start].at (brk, i-1).demerits_;
+
+ if (dem < best_demerits)
+ {
+ best_demerits = dem;
+ best_so_far = get_solution (start, end, i);
+ }
+ else
+ {
+ vector<Column_x_positions> cur = get_solution (start, end, i);
+ bool too_many_lines = true;
+
+ for (vsize j = 0; j < cur.size (); j++)
+ if (cur[j].force_ < 0)
+ {
+ too_many_lines = false;
+ break;
+ }
+ if (too_many_lines)
+ return best_so_far;
+ }
+ }
+ if (best_so_far.size ())
+ return best_so_far;
+ return get_solution (start, end, max_systems);
+}
+
std::vector<Line_details>
Constrained_breaking::get_details (vsize start, vsize end, vsize sys_count)
{
- vsize rank;
- vsize brk;
- prepare_solution (start, end, sys_count, &rank, &brk);
- vector<Constrained_break_node> const &st = state_[start];
+ vsize brk = prepare_solution (start, end, sys_count);
+ Matrix<Constrained_break_node> const &st = state_[start];
vector<Line_details> ret;
for (int sys = sys_count-1; sys >= 0 && brk != VPOS; sys--)
{
- ret.push_back (st[sys*rank + brk].details_);
- brk = st[sys*rank + brk].prev_;
+ ret.push_back (st.at (brk, sys).details_);
+ brk = st.at (brk, sys).prev_;
}
+ reverse (ret);
return ret;
}
int
Constrained_breaking::get_min_systems (vsize start, vsize end)
{
- vsize rank;
- vsize brk;
vsize sys_count;
-
- prepare_solution (start, end, 1, &rank, &brk);
- vector<Constrained_break_node> const &st = state_[start];
+ vsize brk = prepare_solution (start, end, 1);
+ vsize rank = breaks_.size () - starting_breakpoints_[start];
+ Matrix<Constrained_break_node> const &st = state_[start];
/* sys_count < rank : rank is the # of breakpoints, we can't have more systems */
for (sys_count = 0; sys_count < rank; sys_count++)
{
resize (sys_count + 3);
}
- if (!isinf (st[sys_count*rank + brk].details_.force_))
+ if (!isinf (st.at (brk, sys_count).details_.force_))
return sys_count + 1;
}
/* no possible breaks satisfy constraints */
return brk - starting_breakpoints_[start];
}
-void
-Constrained_breaking::prepare_solution (vsize start, vsize end, vsize sys_count, vsize *rank, vsize *brk)
+vsize
+Constrained_breaking::prepare_solution (vsize start, vsize end, vsize sys_count)
{
assert (start < start_.size () && (end == VPOS || end <= start_.size ()));
assert (start < end);
if (end == start_.size ())
end = VPOS;
- *rank = breaks_.size () - starting_breakpoints_[start];
- *brk = end == VPOS ? breaks_.size () - 1 : starting_breakpoints_[end];
- *brk -= starting_breakpoints_[start];
+ vsize brk;
+ brk = end == VPOS ? breaks_.size () - 1 : starting_breakpoints_[end];
+ brk -= starting_breakpoints_[start];
+ return brk;
}
Constrained_breaking::Constrained_breaking ()
source file of the GNU LilyPond music typesetter
- (c) 2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 2006 Joe Neeman <joeneeman@gmail.com>
*/
#ifndef CONSTRAINED_BREAKING_HH
#include "break-algorithm.hh"
#include "lily-guile.hh"
+#include "matrix.hh"
struct Line_details {
Real force_;
- Real extent_; /* Y-extent of the system */
+ Interval extent_; /* Y-extent of the system */
Real padding_; /* compulsory space after this system (if we're not last on a page) */
Real bottom_padding_;
Real space_; /* spring length */
Line_details ()
{
force_ = infinity_f;
- extent_ = 0;
padding_ = 0;
bottom_padding_ = 0;
space_ = 0;
Constrained_breaking ();
Constrained_breaking (vector<vsize> const &start_col_posns);
- vector<Column_x_positions> get_solution(vsize start, vsize end, vsize sys_count);
+ vector<Column_x_positions> get_solution (vsize start, vsize end, vsize sys_count);
+ vector<Column_x_positions> get_best_solution (vsize start, vsize end);
vector<Line_details> get_details (vsize start, vsize end, vsize sys_count);
int get_max_systems (vsize start, vsize end);
int get_min_systems (vsize start, vsize end);
/* the (i,j)th entry is the configuration for breaking between
columns i and j */
- vector<Line_details> lines_;
- vsize lines_rank_;
+ Matrix<Line_details> lines_;
/* the [i](j,k)th entry is the score for fitting the first k bars onto the
first j systems, starting at the i'th allowed starting column */
- vector<vector<Constrained_break_node> > state_;
+ vector<Matrix<Constrained_break_node> > state_;
vector<vsize> start_; /* the columns at which we might be asked to start breaking */
vector<vsize> starting_breakpoints_; /* the corresponding index in breaks_ */
vector<vsize> breaks_;
Column_x_positions space_line (vsize start_col, vsize end_col);
- void prepare_solution (vsize start, vsize end, vsize sys_count, vsize *rank, vsize *brk);
+ vsize prepare_solution (vsize start, vsize end, vsize sys_count);
Real combine_demerits (Real force, Real prev_force);
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