X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstencil.cc;h=329c5cae61d2d85b87a41273ae9564bc6b486749;hb=ce593a5d9614d463ac0255eac17ceb50ce3bcc29;hp=e10f1f403a00d701e2da53ea9490c243018ee4d9;hpb=0af93df0b9cdd9b75967b155000a87a8a9d41933;p=lilypond.git diff --git a/lily/stencil.cc b/lily/stencil.cc index e10f1f403a..329c5cae61 100644 --- a/lily/stencil.cc +++ b/lily/stencil.cc @@ -3,18 +3,15 @@ source file of the GNU LilyPond music typesetter - (c) 1997--2004 Han-Wen Nienhuys + (c) 1997--2006 Han-Wen Nienhuys */ -#include -#include // isinf - -#include "input-smob.hh" -#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" @@ -42,7 +39,7 @@ Stencil::print_smob (SCM, SCM port, scm_print_state *) SCM Stencil::mark_smob (SCM smob) { - Stencil *s = (Stencil*) ly_cdr (smob); + Stencil *s = (Stencil *) SCM_CELL_WORD_1 (smob); return s->expr_; } @@ -56,12 +53,12 @@ Stencil::extent (Axis a) const 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 @@ -81,17 +78,62 @@ 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 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); } @@ -103,11 +145,11 @@ Stencil::translate (Offset o) 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); } @@ -119,8 +161,6 @@ Stencil::add_stencil (Stencil const &s) dim_.unite (s.dim_); } - - void Stencil::set_empty (bool e) { @@ -131,8 +171,8 @@ 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); } } @@ -140,7 +180,7 @@ void Stencil::align_to (Axis a, Real x) { if (is_empty ()) - return ; + return; Interval i (extent (a)); translate_axis (-i.linear_combination (x), a); @@ -169,11 +209,11 @@ Stencil::moved_to_edge (Axis a, Direction d, Stencil const &s, + 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; } @@ -186,141 +226,14 @@ Stencil::add_at_edge (Axis a, Direction d, Stencil const &s, Real padding, 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 (!ly_c_pair_p (expr)) - return; - - SCM head =ly_car (expr); - if (unsmob_input (head)) - { - Input *ip = unsmob_input (head); - (*func)(func_arg, - scm_list_4 (ly_symbol2scm ("define-origin"), - scm_makfrom0str (ip->file_string () - .to_str0 ()), - scm_int2num (ip->line_number ()), - scm_int2num (ip->column_number ()))); - - expr = ly_cadr (expr); - } - else if (head == ly_symbol2scm ("no-origin")) - { - (*func) (func_arg, scm_list_1 (head)); - expr = ly_cadr (expr); - } - else if (head == ly_symbol2scm ("translate-stencil")) - { - o += ly_scm2offset (ly_cadr (expr)); - expr = ly_caddr (expr); - } - else if (head == ly_symbol2scm ("combine-stencil")) - { - for (SCM x = ly_cdr (expr); ly_c_pair_p (x); x = ly_cdr (x)) - { - interpret_stencil_expression (ly_car (x), func, func_arg, o); - } - 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; - } - } -} - - -struct Font_list -{ - SCM fonts_; -}; - -static void -find_font_function (void * fs, SCM x) -{ - Font_list * me = (Font_list*)fs; - - if (ly_car (x) == ly_symbol2scm ("placebox")) - { - SCM args = ly_cdr (x); - SCM what = ly_caddr (args); - - if (ly_c_pair_p (what)) - { - SCM head = ly_car (what); - if (ly_symbol2scm ("text") == head) - me->fonts_ = scm_cons (ly_cadr (what), me->fonts_); - else if (head == ly_symbol2scm ("char")) - me->fonts_ = scm_cons (ly_cadr (what), me->fonts_); - } - } -} - -SCM -find_expression_fonts (SCM expr) -{ - Font_list fl; - - fl.fonts_ = SCM_EOL; - - interpret_stencil_expression (expr, &find_font_function, - (void*) &fl, Offset (0,0)); - - return fl.fonts_; -} - - -LY_DEFINE (ly_stencil_fonts, "ly:stencil-fonts", - 1, 0, 0, (SCM s), - " Analyse @var{s}, and return a list of fonts used in @var{s}.") -{ - Stencil *stil = unsmob_stencil (s); - SCM_ASSERT_TYPE (stil, s, SCM_ARG1, __FUNCTION__, "Stencil"); - return find_expression_fonts (stil->expr ()); -} - -struct Stencil_interpret_arguments { - SCM func; - SCM arg1; -}; - -void stencil_interpret_in_scm (void* p, SCM expr) -{ - Stencil_interpret_arguments * ap = (Stencil_interpret_arguments*) p; - scm_call_2 (ap->func, ap->arg1, expr); -} - - - -LY_DEFINE (ly_interpret_stencil_expression, "ly:interpret-stencil-expression", - 4, 0, 0, (SCM expr, SCM func, SCM arg1, SCM offset), - "Parse EXPR, feed bits to FUNC with first arg ARG1") -{ - SCM_ASSERT_TYPE(ly_c_procedure_p(func), func, SCM_ARG1, __FUNCTION__, - "procedure"); - - Stencil_interpret_arguments a ; - a.func = func; - a.arg1 = arg1; - Offset o = ly_scm2offset (offset); - - interpret_stencil_expression (expr, stencil_interpret_in_scm, - (void*) &a, o); - - return SCM_UNSPECIFIED; +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; }