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
9 > I have changed Mark_engraver to use the G_... classes.
10 > My implementation has the following shortcomings at the
13 > - markScriptPadding is not supported, since G_staff_side_item does not
16 > - markBreakPriority is not supported.
18 > - Mostly, you want the marks aligned with the bar lines. I don't
19 > really understand how to implement that feature.
21 > - You get lots of warnings about missing 'number' and 'Large'
24 * scm-ify \property values.
25 - The direction of textual scripts ('^' or '_') is ignored.
26 * move class Lookup {} into scm
30 * update mi2mu for lilypond 1.1
33 * collisions/voices \voiceone \voicetwo are broken; see
34 input/praeludium-fuga-E.ly
35 mutopia/J.S.Bach/wtk1-fugue2.ly
45 * ly2dvi barfs on linewidth = -1.
55 * fix height of / collisions with lyrics (chords),
56 see input/test/vertical-text.ly
59 - one volta spanner per score
60 - repeat bars span staffs
61 - placement alternative number
63 * latex bla.tex broken (titles / \lilyfooter stuff?)
65 * check/set minimum slur/tie length
69 * \breathmark TeX macro
73 * add new glyphs to font.ly
75 * formatting of input stuff.
77 * \notes{ a \< b \cr } vs \notes{ a \< b \! }
79 * if possible, it might be nice for a warning to appear if someone does
80 \translator with no name and without assigning it to an
85 * 'hinterfleisch' before bar (e.g. wtk1-fugue2)?
87 * \type Voice \times 2/3 { [c8 c16 c16 c16 c16] }
89 * fix singleStaffBracket
91 * repeat bars: need distance after ":|" and before "|:"
93 Summary of minor spelling irregularities:
94 - capitalization/use of underscores in property names
96 * fix SkipBars -> skipBars
98 * \shape 1st dim skipped?
100 * fix marks/barnumbers/marginal notes
103 lbheel = \script { "bheel" 0 0 -1 0 0 }
104 rbheel = \script { "bheel" 0 0 1 0 0 }
105 lbtoe = \script { "btoe" 0 0 -1 0 0 }
106 rbtoe = \script { "btoe" 0 0 1 0 0 }
107 lfheel = \script { "fheel" 0 0 -1 0 0 }
108 rfheel = \script { "fheel" 0 0 1 0 0 }
109 lftoe = \script { "ftoe" 0 0 -1 0 0 }
110 rftoe = \script { "ftoe" 0 0 1 0 0 }
114 portato= \script { "portato" 0 -1 0 1 0 }
117 * uniformise recent feta contributions.
119 * check out legal/(c) matters for scores.
121 * check out GCC signatures?
123 * Align_element::padding ?
125 * uniformise property names.
127 * ydirection <-> yDirection
129 * typo checks on property names?
131 * use streambufs and iostream
132 to provide IO handling for TeX stream, mudela stream, data-file.
134 * seriously buffer TeX output (do profile of writing .5 mb TeX file.)
136 * strip EXEs before installing
138 * zip target for binary windows dist (JBR)
140 * junking \skip req in lyrics
143 - \type -> \context ?
147 - mix engraver hacking with music ?
148 - \once\property KEY = VAL
149 - \addtranslator, \removetranslator
150 - junk ^ and _ for scripts
154 * percussion note heads
156 * mi2mu empty staffs.
158 * midi_instrument -> midiInstrument
160 * horizontal centering of dynamics
162 * \font\fontA=feta20.afm (.afm?)
166 * stable make/config stuff
168 * $DEPENDENCIES_OUTPUT support
170 * fix weird behaviour when .AFMs/.SCMs not found.
172 * Xdvi zooming ?! Try to understand GS garbage collection.
173 gs: Error: /undefined in draw_beam
176 * fix vertical alignment and stafflines
178 * GrandStaff needs more work -- I want a single word
179 `harpsichord' to the left of the grandstaff, not one on each
180 stave. (Organ staff -- with separate pedal -- but common
181 properties may be something to think about. Of course for
182 organ you want to be able to give stop indications on the way
183 through, so the \property Voice.Instrument would be a stop,
184 and \property GrandStaff.instrument would be PipeOrgan...)
186 * revise the Score_priority_align_engraver concept. It sucks.
188 * make new VoiceOne, VoiceTwo, VoiceThree contexts with
189 ydirection and hshift preset
191 * *.yo: fix pod manpage layout legacy
193 * text-items clash with stems/beams
195 * --include, -I option for ly2dvi (pass on to lily)
197 * fix placement of beam-less abbrev
200 <{\voiceone cis4. cis8 cis4 | cis4 cis cis | r1 }
201 {\voicetwo cis,4 r r | r2. | r1 }> |
204 * try to use template<Type> iso MACRO(Type)
206 - NEWS: ... Musical_pitch (analogous to Duration and Rhythmic_req)
207 think about, analogous to pitch:
208 * { a4 a16 } c <-- duration of c?
209 * <a4 b8> c <-- duration of c?
213 * fix audio-items (don't use (input) requests, but copy data)
215 * make sure all ex's have a mudela-version
217 * do rest-collisions for Multi_measure_rests as well.
219 * split error/warning in error/warning/non_fatal_error
221 * add a Duration_convert member to Duration_iter to set parameters.
222 Junk global duration settings.
226 * minimum length second part broken tie
228 * en-,discouraged linebreaking:
229 - handle DISALLOW < penalty > FORCE
230 - discourage breaking of slurs
235 * fix variable define/lookup parser global<->paper
237 * fix title/instrument placements; see input/test/title.ly
239 * <\voiceone c4. \voicetwo c4>
241 * add full cello suites to web site (kom op, Maarten!)
243 * Rethink Time_description
244 * \cadenza , \meter, \grouping should all be \properties
249 - abbreviation-beam -> (measured/unmeasured) tremolo
250 - partial -> anacrouse
254 * robustify Beam (in case of no stems, 32nd notes)
256 * decentralised spring factory
258 * move paper vars into engraver properties
260 * check for groff / troff/ nroff et
262 * more intelligent file searching
263 - make LilyPond RPM fully relocatable
266 - break-up heavily-nested score blocks
268 * disable spaces in TeX stuff
270 * handle ^C for tmp/file creation.
273 * dots & rest collisions.
281 * versioning for Feta
283 * the warning about the negative slur/tie length appears twice
286 * The `3' in the meter key is a one or two pixels too thin (at 600dpi)
289 * the bracket is ugly (wings are too parabolic, should be more circular)
291 * better hshift (dots, distance, head dependent)
293 * clefs (AG): The "8" should appear closer to the actual clef,
296 * put errorlevel in Input class
300 * integrate midi-elts from mi2mu and lily?
303 FMR: Free memory read:
304 * This is occurring while in:
305 Bar_column::do_substitute_dependency(Score_element*,Score_element*) [bar
307 Score_element::unlink() [score-elem.cc:383]
308 Paper_score::set_breaking(const Array<Column_x_positions>&) [p-score.cc:
310 Paper_score::calc_breaking() [p-score.cc:189]
311 Paper_score::process() [p-score.cc:203]
312 Score::run_translator(Music_output_def*) [score.cc:117]
313 * Reading 4 bytes from 0x65d3a0 in the heap.
314 * Address 0x65d3a0 is 160 bytes into a freed block at 0x65d300 of 208 bytes.
315 * This block was allocated from:
317 __builtin_new [libgcc.a]
318 Span_score_bar::clone()const [span-score-bar.hh:20]
319 Item::copy_breakable_items() [item.cc:69]
320 Item::do_breakable_col_processing() [item.cc:89]
321 Score_element::calcalute_dependencies(int,int,void(Score_element::*)()*)
323 * There have been 22 frees since this block was freed from:
325 __builtin_delete [libgcc.a]
326 Span_score_bar::~Span_score_bar() [span-score-bar.hh:18]
327 Paper_score::set_breaking(const Array<Column_x_positions>&) [p-score.cc:
329 Paper_score::calc_breaking() [p-score.cc:189]
330 Paper_score::process() [p-score.cc:203]
331 Postprocessing elements...
332 TeX output to score-bar-scripts.tex...
337 * make GCC warn about ctor that leaves member vars uninitialised.
339 * redhat (v?) graphical install bomb-out?
341 * GNU diff 2.7: diff -rN does not see a new directory with empty file
343 * GNU patch 2.1: <must find simple example> if patch chokes on a
344 hunk, or on allegedly unsorted hunks in a diff, it may stop
345 without a trace of failure (create .rej file, print error or
346 dump core) and just ignore any further diffs.
350 f = fopen ("/dev/null", "r")
355 * GNU indent: handle C++
358 - 'double-fix' mode: ignore identical fix, rather than suggest
359 to revert patch direction when (more or less? exactly) the same
365 - fix position of bar number
366 - stack scripts in chords:
367 % fingering: footing:
368 < a-4 c-2 g-1 > < c-\ltoe e-\lheel >
370 - slur parts as a script
371 - stack parameterised scripts for fingering and footing:
374 - automatically add a \version if not present.
377 - convert-mudela -e empty.ly
380 - should handle block comments too.
381 - handle lexer modes (\header, \melodic, \lyric) etc.
384 - fontlock: \melodic \melodic
386 * use properties for:
391 - bartypes (get rid of derived Span_bar_engravers)
396 - optimal pagebreaking.
398 * Unicode support? -> man 7 unicode
401 - detect of 16/8 bit files
402 - examples to go with it.
405 - write a faster Spring_spacer (without matrices if possible)
406 - relate energybound to linelen unitspace fontsize etc.
407 - used fixed point fp?
410 - output header info to MIDI too.
412 * a musical dictionary. See Documentation/vocabulary-*, other
422 - guitar chords (fret diagrams)
423 - other chord name styles (american(?) style)
428 - derive lily_stream, Dstream, texstream from ostream?
429 - indentable stream as baseclass for TeX stream, lily stream, Dstream.
430 - use dstream feature in mi2mu
431 - integrate IO checking into stream class
438 * add to MIDI output:
440 - ornaments (and trills?)
445 - account for rhythmic position in measure
449 - make separate class for Grace_*_engravers
450 (which is at Voice_gravs level)
451 - make encapsulated spacing problems.
453 * accidentals per Voice_group
455 * Output class, handles : (smallish)
456 - help text /(c) notice?
458 - warning /errors/progress
459 - abort on error/warning; exit status
460 - quiet/ignore-version options
465 * elaborate Staff_side baseclass:
472 - PS lines to .eps files
473 - write custom prolog
476 * Output an output format independent (ofi) typeset file; and
477 make ofi2 TeX, MusiXTex, Display PostScript, PostScript,
478 Ascii... interpreters. (difficult)
481 - Common Music Notation
482 - PostScript output (esp. Beams, Slurs, etc)
483 - Move all Score_elems, into libmutype.a
487 - Doc (C) stuff of sheet music
488 - a better format? SGML? TeX? Info?
491 * more spanners (smallish)
495 * Rewrite Stem, Beam and Rhythmic_grouping (hairy)
497 - doc on Rhythmic_grouping
498 - general shaving on Beam and Stem
500 - separate visual from rhythmic info even more
504 - Ledger lines, should be separate item: Ledger_lines, Ledger_lines
505 - set different line sizes / thicknesses
506 - beam stem showthrough, inter beam sizes (french vs german style)
509 - left/right note balls should be handled by Collision:
510 < \multi 2; { \stem 1; <b c> } { <f as b> } >
513 - merge key{item} & localkey{item}?
514 - spacing, national styles?
517 - redo Notehead to allow digits as heads
518 - add a \tablature {} lexer mode for easy entering
520 * should adjust stemlength for flag number.
523 - caching breakpoints
525 - specify number of lines
531 * c4 4 4 4 for c4 c4 c4 c4?
533 * neatly (and readably) expressing concurrent
548 * relative mode for pitch entering
550 * configure pitch_byte
552 * rest name configurable
556 * limit memory usage; the full coriolan takes up too much resources.
558 * fix confusing naming in Engraver vs Engraver_group_engraver (context)
560 * progress when creating MIDI elts.
562 * A range for context errors (eg. mark both { and }. )
564 * lyric in staff (sharpsharp in staff, text below)
568 * write Dynamic_line (to group dynamics horizontally)
570 * use Real for all y positions.
571 - use translate_axis( .. ,Y_AXIS) iso separate variables.
573 * half-sharps, half-flats
575 * adaptive accidental spacing.
577 * handle EOF graciously in error messages.
579 * really centered whole rest
581 * centered multi-bar-rest
583 * declare notenametab?
585 * midi esp.: use I32 iso int where 32 bits are needed (or assumed...)
587 * stafftypes: voice names/ instrument names.
591 * C meter iso 4/4, idem for alla breve, etc.
593 * textspanner: center position
595 * % toe to bheel four to five
601 (where "to" is a tiny bow)
603 * auxilliary file for caching info.
607 * clean solution for staffsize in items.
613 * Output data structures of Mudela in XML/SGML.
615 * create libmudela, or liblily_frontend
617 * move MIDI stuff (including Quantization) to a ANSI C libmidi library.
619 * use an embedded language: Python, Scheme
624 * y -dims in internote? Staff-space? X-dimensions?
626 * Spacing_request for manually adjusting spacing
628 * caching breakpoints
630 * used fixedpoint arithmetic for min. energy.
632 * move towards incremental algorithms.
634 * far fetched language ideas
635 - design meta-language like TeX and Metafont
636 - programming/macros input
638 * versioning stuff (cvt mudela, mudela, etc.)
642 * dynamic loading of engravers?
646 ****************************************
647 Han-Wen Nienhuys <hanwen@cs.uu.nl> writes:
649 > mcmanus@IDT.NET writes:
650 > > > I want different C++ objects (with scheme embedded) to be linked by
651 > > > C++ pointers. I want to access these other objects from the Scheme
652 > > > code, and I want access to these pointers from C++.
654 > > You can do this with a combination of smob's and primitive functions,
655 > > though it may not be be exactly what you wanted. You would have one
656 > > smob for each class in your application, and then you would write a
657 > > primitive function that would return the objects that are linked to a
660 > And the smob and the C++ class are interlinked? Like
663 > Foo_smob *smob_ptr_;
667 > Foo_class *class_ptr_
670 Usually you can get away without having this interlinked structure.
671 One piece of information you need when exporting objects to scheme is
672 the smob tag for your class. You might store this value (a long) into
673 a class static variable, or a file static variable. I'll use a class
674 static variable in this example.
676 I typically use code that works like this (untested code ahead):
679 static long *Foo_smob_tag;
680 SCM obj; // representation as a scheme object, description comes later
683 // call this once on startup
684 void init_Foo_class {
685 static scm_smobfuns type_rec;
687 type_rec.mark = foo_mark;
688 type_rec.free = foo_free;
689 type_rec.print = foo_display;
691 Foo_class::Foo_smob_tag = new int(scm_new_smob(type_rec));
694 When you want to export an object to scheme, you put a pointer to the
695 object itself in the cdr of the cell, and the tag in the car of the
696 cell. The code looks like this:
702 return(SCM_NIMP(obj) && SCM_CAR(obj) == Foo_class::Foo_smob_tag);
705 // given a Scheme representation, return, a C++ representation
709 return((Foo_class*)SCM_CDR(obj));
712 // the SCM representation of the object is stored inside itself
713 // this will become useful when destructor gets called
715 foo_box(Foo_class *foo)
718 SCM_NEWCELL(foo->obj);
719 SCM_SETCAR(foo->obj, Foo_class::Foo_smob_tag);
720 SCM_SETCDR(foo->obj, (SCM)foo);
725 > C++ determines life time, so what is the strategy?
727 What happens now when the destructor gets called? Lets set the cdr to
728 NULL, and then check for that in all of the primitive functions that
729 use your smob. We'll call this notion 'live'; a scheme object is
730 'live' if the C++ representation still exists, it's dead if the C++
731 object is gone. You can still have references to dead objects in
732 scheme code; it's just an error to use them. This idea is stolen from
733 Emacs's handling of buffers ('buffer-live-p' and friends).
735 Add another function, foo_live_p:
740 return(foo_p(obj) && SCM_CDR(obj) != NULL);
743 In you destructor, you need to do:
747 SCM_CDR(this->obj, NULL);
750 When writing new primitives, now just check foo_live_p().
752 I hope the above helps,
758 "Even if you are on the right track, you'll get run over
759 if you just sit there."
760 --Will Rogers (1879-1935)
762 ***************************