1 Features you cannot find in the doco as working, should be mentioned
4 This is an assorted collection of stuff that will be done, might be
5 done, or is an idea that I want to think about
7 Most of the items are marked in the code as well, with full explanation.
8 grep for TODO and ugh/ugr/urg
10 > I have changed Mark_engraver to use the G_... classes.
11 > My implementation has the following shortcomings at the
14 > - markScriptPadding is not supported, since G_staff_side_item does not
17 > - markBreakPriority is not supported.
19 > - Mostly, you want the marks aligned with the bar lines. I don't
20 > really understand how to implement that feature.
22 > - You get lots of warnings about missing 'number' and 'Large'
25 *{ \voiceone <a'4.*2/3 d''4.*2/3 fis''4.*2/3> [g''8 fis'' e''] d''4 |}
27 { \voicetwo d'4 d'2.*2/3 } spacing
31 * sharp /flat on trills (in MIDI ??)
33 * scm-ify \property values.
34 - The direction of textual scripts ('^' or '_') is ignored.
35 * move class Lookup {} into scm
39 * update mi2mu for lilypond 1.1
42 * collisions/voices \voiceone \voicetwo are broken; see
43 input/praeludium-fuga-E.ly
44 mutopia/J.S.Bach/wtk1-fugue2.ly
54 * ly2dvi barfs on linewidth = -1.
64 * fix height of / collisions with lyrics (chords),
65 see input/test/vertical-text.ly
68 - one volta spanner per score
69 - repeat bars span staffs
70 - placement alternative number
72 * latex bla.tex broken (titles / \lilyfooter stuff?)
74 * check/set minimum slur/tie length
78 * \breathmark TeX macro
82 * add new glyphs to font.ly
84 * formatting of input stuff.
86 * \notes{ a \< b \cr } vs \notes{ a \< b \! }
88 * if possible, it might be nice for a warning to appear if someone does
89 \translator with no name and without assigning it to an
94 * 'hinterfleisch' before bar (e.g. wtk1-fugue2)?
96 * \type Voice \times 2/3 { [c8 c16 c16 c16 c16] }
98 * fix singleStaffBracket
100 * repeat bars: need distance after ":|" and before "|:"
102 Summary of minor spelling irregularities:
103 - capitalization/use of underscores in property names
105 * fix SkipBars -> skipBars
107 * \shape 1st dim skipped?
109 * fix marks/barnumbers/marginal notes
112 lbheel = \script { "bheel" 0 0 -1 0 0 }
113 rbheel = \script { "bheel" 0 0 1 0 0 }
114 lbtoe = \script { "btoe" 0 0 -1 0 0 }
115 rbtoe = \script { "btoe" 0 0 1 0 0 }
116 lfheel = \script { "fheel" 0 0 -1 0 0 }
117 rfheel = \script { "fheel" 0 0 1 0 0 }
118 lftoe = \script { "ftoe" 0 0 -1 0 0 }
119 rftoe = \script { "ftoe" 0 0 1 0 0 }
123 portato= \script { "portato" 0 -1 0 1 0 }
126 * uniformise recent feta contributions.
128 * check out legal/(c) matters for scores.
130 * check out GCC signatures?
132 * Align_element::padding ?
134 * uniformise property names.
136 * ydirection <-> yDirection
138 * typo checks on property names?
140 * use streambufs and iostream
141 to provide IO handling for TeX stream, mudela stream, data-file.
143 * seriously buffer TeX output (do profile of writing .5 mb TeX file.)
145 * strip EXEs before installing
147 * zip target for binary windows dist (JBR)
149 * junking \skip req in lyrics
152 - \type -> \context ?
156 - mix engraver hacking with music ?
157 - \once\property KEY = VAL
158 - \addtranslator, \removetranslator
159 - junk ^ and _ for scripts
163 * percussion note heads
165 * mi2mu empty staffs.
167 * midi_instrument -> midiInstrument
169 * horizontal centering of dynamics
171 * \font\fontA=feta20.afm (.afm?)
175 * stable make/config stuff
177 * $DEPENDENCIES_OUTPUT support
179 * fix weird behaviour when .AFMs/.SCMs not found.
181 * Xdvi zooming ?! Try to understand GS garbage collection.
182 gs: Error: /undefined in draw_beam
185 * fix vertical alignment and stafflines
187 * GrandStaff needs more work -- I want a single word
188 `harpsichord' to the left of the grandstaff, not one on each
189 stave. (Organ staff -- with separate pedal -- but common
190 properties may be something to think about. Of course for
191 organ you want to be able to give stop indications on the way
192 through, so the \property Voice.Instrument would be a stop,
193 and \property GrandStaff.instrument would be PipeOrgan...)
195 * revise the Score_priority_align_engraver concept. It sucks.
197 * make new VoiceOne, VoiceTwo, VoiceThree contexts with
198 ydirection and hshift preset
200 * *.yo: fix pod manpage layout legacy
202 * text-items clash with stems/beams
204 * --include, -I option for ly2dvi (pass on to lily)
206 * fix placement of beam-less abbrev
209 <{\voiceone cis4. cis8 cis4 | cis4 cis cis | r1 }
210 {\voicetwo cis,4 r r | r2. | r1 }> |
213 * try to use template<Type> iso MACRO(Type)
215 - NEWS: ... Musical_pitch (analogous to Duration and Rhythmic_req)
216 think about, analogous to pitch:
217 * { a4 a16 } c <-- duration of c?
218 * <a4 b8> c <-- duration of c?
222 * fix audio-items (don't use (input) requests, but copy data)
224 * make sure all ex's have a mudela-version
226 * do rest-collisions for Multi_measure_rests as well.
228 * split error/warning in error/warning/non_fatal_error
230 * add a Duration_convert member to Duration_iter to set parameters.
231 Junk global duration settings.
235 * minimum length second part broken tie
237 * en-,discouraged linebreaking:
238 - handle DISALLOW < penalty > FORCE
239 - discourage breaking of slurs
244 * fix variable define/lookup parser global<->paper
246 * fix title/instrument placements; see input/test/title.ly
248 * <\voiceone c4. \voicetwo c4>
250 * add full cello suites to web site (kom op, Maarten!)
252 * Rethink Time_description
253 * \cadenza , \meter, \grouping should all be \properties
258 - abbreviation-beam -> (measured/unmeasured) tremolo
259 - partial -> anacrouse
263 * robustify Beam (in case of no stems, 32nd notes)
265 * decentralised spring factory
267 * move paper vars into engraver properties
269 * check for groff / troff/ nroff et
271 * more intelligent file searching
272 - make LilyPond RPM fully relocatable
275 - break-up heavily-nested score blocks
277 * disable spaces in TeX stuff
279 * handle ^C for tmp/file creation.
282 * dots & rest collisions.
290 * versioning for Feta
292 * the warning about the negative slur/tie length appears twice
295 * The `3' in the meter key is a one or two pixels too thin (at 600dpi)
298 * the bracket is ugly (wings are too parabolic, should be more circular)
300 * better hshift (dots, distance, head dependent)
302 * clefs (AG): The "8" should appear closer to the actual clef,
305 * put errorlevel in Input class
309 * integrate midi-elts from mi2mu and lily?
312 FMR: Free memory read:
313 * This is occurring while in:
314 Bar_column::do_substitute_dependency(Score_element*,Score_element*) [bar
316 Score_element::unlink() [score-elem.cc:383]
317 Paper_score::set_breaking(const Array<Column_x_positions>&) [p-score.cc:
319 Paper_score::calc_breaking() [p-score.cc:189]
320 Paper_score::process() [p-score.cc:203]
321 Score::run_translator(Music_output_def*) [score.cc:117]
322 * Reading 4 bytes from 0x65d3a0 in the heap.
323 * Address 0x65d3a0 is 160 bytes into a freed block at 0x65d300 of 208 bytes.
324 * This block was allocated from:
326 __builtin_new [libgcc.a]
327 Span_score_bar::clone()const [span-score-bar.hh:20]
328 Item::copy_breakable_items() [item.cc:69]
329 Item::do_breakable_col_processing() [item.cc:89]
330 Score_element::calcalute_dependencies(int,int,void(Score_element::*)()*)
332 * There have been 22 frees since this block was freed from:
334 __builtin_delete [libgcc.a]
335 Span_score_bar::~Span_score_bar() [span-score-bar.hh:18]
336 Paper_score::set_breaking(const Array<Column_x_positions>&) [p-score.cc:
338 Paper_score::calc_breaking() [p-score.cc:189]
339 Paper_score::process() [p-score.cc:203]
340 Postprocessing elements...
341 TeX output to score-bar-scripts.tex...
346 * make GCC warn about ctor that leaves member vars uninitialised.
348 * redhat (v?) graphical install bomb-out?
350 * GNU diff 2.7: diff -rN does not see a new directory with empty file
352 * GNU patch 2.1: <must find simple example> if patch chokes on a
353 hunk, or on allegedly unsorted hunks in a diff, it may stop
354 without a trace of failure (create .rej file, print error or
355 dump core) and just ignore any further diffs.
359 f = fopen ("/dev/null", "r")
364 * GNU indent: handle C++
367 - 'double-fix' mode: ignore identical fix, rather than suggest
368 to revert patch direction when (more or less? exactly) the same
374 - fix position of bar number
375 - stack scripts in chords:
376 % fingering: footing:
377 < a-4 c-2 g-1 > < c-\ltoe e-\lheel >
379 - slur parts as a script
380 - stack parameterised scripts for fingering and footing:
383 - automatically add a \version if not present.
386 - convert-mudela -e empty.ly
389 - should handle block comments too.
390 - handle lexer modes (\header, \melodic, \lyric) etc.
393 - fontlock: \melodic \melodic
395 * use properties for:
400 - bartypes (get rid of derived Span_bar_engravers)
405 - optimal pagebreaking.
407 * Unicode support? -> man 7 unicode
410 - detect of 16/8 bit files
411 - examples to go with it.
414 - write a faster Spring_spacer (without matrices if possible)
415 - relate energybound to linelen unitspace fontsize etc.
416 - used fixed point fp?
419 - output header info to MIDI too.
421 * a musical dictionary. See Documentation/vocabulary-*, other
431 - guitar chords (fret diagrams)
432 - other chord name styles (american(?) style)
437 - derive lily_stream, Dstream, texstream from ostream?
438 - indentable stream as baseclass for TeX stream, lily stream, Dstream.
439 - use dstream feature in mi2mu
440 - integrate IO checking into stream class
447 * add to MIDI output:
449 - ornaments (and trills?)
454 - account for rhythmic position in measure
458 - make separate class for Grace_*_engravers
459 (which is at Voice_gravs level)
460 - make encapsulated spacing problems.
462 * accidentals per Voice_group
464 * Output class, handles : (smallish)
465 - help text /(c) notice?
467 - warning /errors/progress
468 - abort on error/warning; exit status
469 - quiet/ignore-version options
474 * elaborate Staff_side baseclass:
481 - PS lines to .eps files
482 - write custom prolog
485 * Output an output format independent (ofi) typeset file; and
486 make ofi2 TeX, MusiXTex, Display PostScript, PostScript,
487 Ascii... interpreters. (difficult)
490 - Common Music Notation
491 - PostScript output (esp. Beams, Slurs, etc)
492 - Move all Score_elems, into libmutype.a
496 - Doc (C) stuff of sheet music
497 - a better format? SGML? TeX? Info?
500 * more spanners (smallish)
504 * Rewrite Stem, Beam and Rhythmic_grouping (hairy)
506 - doc on Rhythmic_grouping
507 - general shaving on Beam and Stem
509 - separate visual from rhythmic info even more
513 - Ledger lines, should be separate item: Ledger_lines, Ledger_lines
514 - set different line sizes / thicknesses
515 - beam stem showthrough, inter beam sizes (french vs german style)
518 - left/right note balls should be handled by Collision:
519 < \multi 2; { \stem 1; <b c> } { <f as b> } >
522 - merge key{item} & localkey{item}?
523 - spacing, national styles?
526 - redo Notehead to allow digits as heads
527 - add a \tablature {} lexer mode for easy entering
529 * should adjust stemlength for flag number.
532 - caching breakpoints
534 - specify number of lines
540 * c4 4 4 4 for c4 c4 c4 c4?
542 * neatly (and readably) expressing concurrent
557 * relative mode for pitch entering
559 * configure pitch_byte
561 * rest name configurable
565 * limit memory usage; the full coriolan takes up too much resources.
567 * fix confusing naming in Engraver vs Engraver_group_engraver (context)
569 * progress when creating MIDI elts.
571 * A range for context errors (eg. mark both { and }. )
573 * lyric in staff (sharpsharp in staff, text below)
577 * write Dynamic_line (to group dynamics horizontally)
579 * use Real for all y positions.
580 - use translate_axis( .. ,Y_AXIS) iso separate variables.
582 * half-sharps, half-flats
584 * adaptive accidental spacing.
586 * handle EOF graciously in error messages.
588 * really centered whole rest
590 * centered multi-bar-rest
592 * declare notenametab?
594 * midi esp.: use I32 iso int where 32 bits are needed (or assumed...)
596 * stafftypes: voice names/ instrument names.
600 * C meter iso 4/4, idem for alla breve, etc.
602 * textspanner: center position
604 * % toe to bheel four to five
610 (where "to" is a tiny bow)
612 * auxilliary file for caching info.
616 * clean solution for staffsize in items.
622 * Output data structures of Mudela in XML/SGML.
624 * create libmudela, or liblily_frontend
626 * move MIDI stuff (including Quantization) to a ANSI C libmidi library.
628 * use an embedded language: Python, Scheme
633 * y -dims in internote? Staff-space? X-dimensions?
635 * Spacing_request for manually adjusting spacing
637 * caching breakpoints
639 * used fixedpoint arithmetic for min. energy.
641 * move towards incremental algorithms.
643 * far fetched language ideas
644 - design meta-language like TeX and Metafont
645 - programming/macros input
647 * versioning stuff (cvt mudela, mudela, etc.)
651 * dynamic loading of engravers?
655 ****************************************
656 Han-Wen Nienhuys <hanwen@cs.uu.nl> writes:
658 > mcmanus@IDT.NET writes:
659 > > > I want different C++ objects (with scheme embedded) to be linked by
660 > > > C++ pointers. I want to access these other objects from the Scheme
661 > > > code, and I want access to these pointers from C++.
663 > > You can do this with a combination of smob's and primitive functions,
664 > > though it may not be be exactly what you wanted. You would have one
665 > > smob for each class in your application, and then you would write a
666 > > primitive function that would return the objects that are linked to a
669 > And the smob and the C++ class are interlinked? Like
672 > Foo_smob *smob_ptr_;
676 > Foo_class *class_ptr_
679 Usually you can get away without having this interlinked structure.
680 One piece of information you need when exporting objects to scheme is
681 the smob tag for your class. You might store this value (a long) into
682 a class static variable, or a file static variable. I'll use a class
683 static variable in this example.
685 I typically use code that works like this (untested code ahead):
688 static long *Foo_smob_tag;
689 SCM obj; // representation as a scheme object, description comes later
692 // call this once on startup
693 void init_Foo_class {
694 static scm_smobfuns type_rec;
696 type_rec.mark = foo_mark;
697 type_rec.free = foo_free;
698 type_rec.print = foo_display;
700 Foo_class::Foo_smob_tag = new int(scm_new_smob(type_rec));
703 When you want to export an object to scheme, you put a pointer to the
704 object itself in the cdr of the cell, and the tag in the car of the
705 cell. The code looks like this:
711 return(SCM_NIMP(obj) && SCM_CAR(obj) == Foo_class::Foo_smob_tag);
714 // given a Scheme representation, return, a C++ representation
718 return((Foo_class*)SCM_CDR(obj));
721 // the SCM representation of the object is stored inside itself
722 // this will become useful when destructor gets called
724 foo_box(Foo_class *foo)
727 SCM_NEWCELL(foo->obj);
728 SCM_SETCAR(foo->obj, Foo_class::Foo_smob_tag);
729 SCM_SETCDR(foo->obj, (SCM)foo);
734 > C++ determines life time, so what is the strategy?
736 What happens now when the destructor gets called? Lets set the cdr to
737 NULL, and then check for that in all of the primitive functions that
738 use your smob. We'll call this notion 'live'; a scheme object is
739 'live' if the C++ representation still exists, it's dead if the C++
740 object is gone. You can still have references to dead objects in
741 scheme code; it's just an error to use them. This idea is stolen from
742 Emacs's handling of buffers ('buffer-live-p' and friends).
744 Add another function, foo_live_p:
749 return(foo_p(obj) && SCM_CDR(obj) != NULL);
752 In you destructor, you need to do:
756 SCM_CDR(this->obj, NULL);
759 When writing new primitives, now just check foo_live_p().
761 I hope the above helps,
767 "Even if you are on the right track, you'll get run over
768 if you just sit there."
769 --Will Rogers (1879-1935)
771 ***************************