-Features you cannot find in the doco as working, should be mentioned
-here.
-This is an assorted collection of stuff that will be done, might be
-done, or is an idea that I want to think about
-
-Most of the items are marked in the code as well, with full explanation.
-grep for TODO and ugh/ugr/urg
-
-*In a piece such as the Zipoli piece in mutopia/... there is a stray
-`8' over every bar line when processed by LilyPond 1.1.25.
-
-TODO before 1.2
-
- * junk Text_def, use G_text_item in stead.
-
- * junk Script_def
-
- * fix partial measures in meaningful way.
-
- * fix AFM for BlueSky AFM files.
-
- * working notehead style.
-
- * add scripts to bars eg. |^"bla"
-
- * relative mode for mi2mu
-
- * uniformise recent feta contributions.
- - use SCM and Molecules for {accordeon stuff, }
- - bigger and fatter 4/4 C
-
- * make a SMOB of Atom and Molecule
-
- * use kerning for dynamics.
-
- * sort out directory stuff.
- - --prefix option?
- - -I option per filetype?
- - kpathsea?
-
-**************
-I also found a few bugs:
-
-* The examples in input/test/bar-scripts.ly and score-bar-scripts.ly
- don't work. The problem seems to be that you can't define a
- a score identifier and then use it in the \score block.
-
-
- - make separate MF chars for endings of ledger lines, and calc rest of lines.
-
- * support_l_arr_ empty in staff-margin's G_staff_side_item
-
-
-************
-
-How can I specify a chord whose duration is longer than a whole note?
-
- \type ChordNames { \chord{ A1*2-min } }
-
-gives me a parse error. And \times doesn't work either. I can't use
-a spacer note. So it seems to be impossible to have long chords of
-general length. Of course, in the example above I can use \breve.
-But what if I want a chord that lasts for 3 whole notes? Or what
-about 2.5 whole notes? Is there a mechanism for getting this kind of
-length?
-
-
-Why does my second extender request get junked in the following:
-
-\score{
-< \notes \relative c''{
- a4()b()c()d c()d()b()a }
- \type Lyrics \lyrics {
- foo1 __ bar2. __ _4 }
-> }
-
-It seems that \cr and \decr don't work any more.
-
-\score{
- \notes{
- a \cr b \rc c }
- \paper{linewidth=-1.;}
-}
-
-Gives me
-
-qq.ly:3:9: warning: can't find (de)crescendo to end:
- a \cr
- b \rc c }
-
-
-
-Use of semicolons is still rather confusing. They are obligatory
-after some types of assignments and illegal after others.
-
- \property foo=bar illegal
- foo = 3 at top level illegal
- foo = 3 inside \paper obligatory
- foo = \notes{ ...} top level illegal
- foo = \translator{ } in \paper obligatory
-
-As far as I can tell, the sole accomplishment of this syntactic
-irregularity is to keep the user as confused as possible.
-
-
-I was trying to get interstaff beams to work and did this:
-
-\score{
-\type GrandStaff <
-\type Staff=one \notes\relative c'{
- \stemup
- [c8 c \translator Staff=two \stemup c c]
- \translator Staff=one
- \stemdown
- [ b8 \translator Staff=two a8]
- \translator Staff=one
- c4
- }
-\type Staff=two \notes{ \clef bass; s1 }
->
-\paper{
- \translator{
- \GrandStaffContext
- minVerticalAlign = 3.0*\staffheight;
- maxVerticalAlign = 3.0*\staffheight;
- }
- linewidth = -1.;
-}
-}
-
-The beams are at the right angle, but they aren't in the right place.
-
-
-
-*******************
-
-
- * fractional chord durs.
-
- * hang Item on Spanner
-
- * remove Interval dim_ from Dimension_cache and rename the struct.
-
- * do --safe for PS output?
-
- * convert-mudela --output
-
- * Staff_margin (with a partial measure.)
-
- * fix "I've been drinking too much"
-
- * fix pletvisibility properties:
- - bracket on/off/no-bracket-when-beam
- - num on/off/no-num-when-beam
-
- * fix: standchen.
-
- * junk backlinks?
-
- * junk text{sharp,flat,etc}
-
- * fix convert-mudela manpage
-
- * decimal point in \paper {}
-
- *{ \voiceone <a'4.*2/3 d''4.*2/3 fis''4.*2/3> [g''8 fis'' e''] d''4 |}
- and=20
- { \voicetwo d'4 d'2.*2/3 } spacing
-
- * tied notes for MIDI
-
- * sharp /flat on trills (in MIDI ??)
-
- * scm-ify \property values.
-
- * move class Lookup {} into scm
-
-BUGS:
-
- * collisions/voices \voiceone \voicetwo are broken; see
- input/praeludium-fuga-E.ly
- mutopia/J.S.Bach/wtk1-fugue2.ly
-
- * fix: text on rests: rediculous dims
-
- * ly2dvi
- - bottomnote for ly2dvi
- - deps for ly2dvi
-
- * fix midi output:
- - default duration? duration must be not entered
- explicitely on first note.
-
- * turn slope-damping on/off
-
- * c4 \! \> c4
-
- * tremolo stuff
-
- * gallina barlines.
-
- * fix height of / collisions with lyrics (chords),
- see input/test/vertical-text.ly; input/test/repeat.ly
-
- * latex bla.tex broken (titles / \lilyfooter stuff?)
-
- * check/set minimum slur/tie length
-
- * msgfmt -o check?
-
- * \breathmark TeX macro
-
- * catch GUILE errors?
-
- * add new glyphs to font.ly
-
- * formatting of input stuff.
-
- * \notes{ a \< b \cr } vs \notes{ a \< b \! }
-
- * if possible, it might be nice for a warning to appear if someone does
- \translator with no name and without assigning it to an
- identifier.
-
- * space after bars?
-
- * 'hinterfleisch' before bar (e.g. wtk1-fugue2)?
-
- * \type Voice \times 2/3 { [c8 c16 c16 c16 c16] }
-
- * fix singleStaffBracket
-
- * repeat bars: need distance after ":|" and before "|:"
-
- Summary of minor spelling irregularities:
- - capitalization/use of underscores in property names
-
- * fix SkipBars -> skipBars
-
- * \shape 1st dim skipped?
-
- * fix marks/barnumbers/marginal notes
-
- * broken scripts:
- lbheel = \script { "bheel" 0 0 -1 0 0 }
- rbheel = \script { "bheel" 0 0 1 0 0 }
- lbtoe = \script { "btoe" 0 0 -1 0 0 }
- rbtoe = \script { "btoe" 0 0 1 0 0 }
- lfheel = \script { "fheel" 0 0 -1 0 0 }
- rfheel = \script { "fheel" 0 0 1 0 0 }
- lftoe = \script { "ftoe" 0 0 -1 0 0 }
- rftoe = \script { "ftoe" 0 0 1 0 0 }
-
- and also
-
- portato= \script { "portato" 0 -1 0 1 0 }
-
-STUFF
- * check out legal/(c) matters for scores.
-
- * check out GCC signatures?
-
- * Align_element::padding ?
-
- * uniformise property names...
- - ydirection <-> yDirection
- - rather allow '_' in identifiers first (i.e. junk ^ and _),
- and do y_direction?
- - typo checks on property names?
-
- * use streambufs and iostream
- to provide IO handling for TeX stream, mudela stream, data-file.
-
- * seriously buffer TeX output (do profile of writing .5 mb TeX file.)
-
- * strip EXEs before installing
-
- * zip target for binary windows dist (JBR)
-
- * junking \skip req in lyrics
-
- * Language:
- - \type -> \context ?
- - \translator -> ?
- - fix \partial
- - \bla {} vs \bla ;
- - mix engraver hacking with music ?
- - \once\property KEY = VAL
- - \addtranslator, \removetranslator
- - junk ^ and _ for scripts
- - junk _ for lyrics.
- - abstract grammar.
-
- * percussion note heads
-
- * mi2mu empty staffs.
-
- * horizontal centering of dynamics
-
- * \font\fontA=feta20.afm (.afm?)
-
- * gzip RH manpage
-
- * stable make/config stuff
-
- * $DEPENDENCIES_OUTPUT support
-
- * Xdvi zooming ?! Try to understand GS garbage collection.
- gs: Error: /undefined in draw_beam
- gs: Operand stack:
-
- * fix vertical alignment and stafflines
-
- * GrandStaff needs more work -- I want a single word
- `harpsichord' to the left of the grandstaff, not one on each
- stave. (Organ staff -- with separate pedal -- but common
- properties may be something to think about. Of course for
- organ you want to be able to give stop indications on the way
- through, so the \property Voice.Instrument would be a stop,
- and \property GrandStaff.instrument would be PipeOrgan...)
-
- * revise the Score_priority_align_engraver concept. It sucks.
-
- * make new VoiceOne, VoiceTwo, VoiceThree contexts with
-ydirection and hshift preset
-
- * *.yo: fix pod manpage layout legacy
-
- * text-items clash with stems/beams
-
- * --include, -I option for ly2dvi (pass on to lily)
-
- * fix placement of beam-less abbrev
-
- * \meter 3/4;
- <{\voiceone cis4. cis8 cis4 | cis4 cis cis | r1 }
- {\voicetwo cis,4 r r | r2. | r1 }> |
- }
-
- * try to use template<Type> iso MACRO(Type)
-
- - NEWS: ... Musical_pitch (analogous to Duration and Rhythmic_req)
- think about, analogous to pitch:
- * { a4 a16 } c <-- duration of c?
- * < a4 b8 > c <-- duration of c?
-
- * \tempo 4. = 90;
-
- * fix audio-items (don't use (input) requests, but copy data)
-
- * make sure all ex's have a mudela-version
-
- * do rest-collisions for Multi_measure_rests as well.
-
- * split error/warning in error/warning/non_fatal_error
-
- * add a Duration_convert member to Duration_iter to set parameters.
- Junk global duration settings.
-
- * minimum length second part broken tie
-
- * en-,discouraged linebreaking:
- - handle DISALLOW < penalty > FORCE
- - discourage breaking of slurs
-
- * fix variable define/lookup parser global<->paper
-
- * fix title/instrument placements; see input/test/title.ly
-
- * <\voiceone c4. \voicetwo c4>
-
- * add full cello suites to web site (kom op, Maarten!)
-
- * Rethink Time_description
- * \cadenza , \meter, \grouping should all be \properties
-
- * rename
- - measure -> bar
- - abbrev -> tremolo
- - abbreviation-beam -> (measured/unmeasured) tremolo
- - partial -> anacrouse
-
- * shared lib
-
- * robustify Beam (in case of no stems, 32nd notes)
-
- * decentralised spring factory
-
- * move paper vars into engraver properties
-
- * check for groff / troff/ nroff et
-
- * more intelligent file searching
-
- * make LilyPond RPM fully relocatable
-
- * disable spaces in TeX stuff
-
- * handle ^C for tmp/file creation.
-
- * dots & rest collisions.
-
- * documentation
- - introduction?
- - info?
- - LaTeX?
- - more manpages?
-
- * versioning for Feta
-
- * the warning about the negative slur/tie length appears twice
- which is irritating.
-
- * The `3' in the meter key is a one or two pixels too thin (at 600dpi)
- in the middle:
-
- * the bracket is ugly (wings are too parabolic, should be more circular)
-
- * better hshift (dots, distance, head dependent)
-
- * clefs (AG): The "8" should appear closer to the actual clef,
- touching it.
-
- * put errorlevel in Input class
-
- * junk nesting slurs
-
- * integrate midi-elts from mi2mu and lily?
-
-
-3RD PARTY BUGS:
-****************
-/*
-ICE
-*/
-signature S {
- int foo ();
-};
-
-signature V {
- S * s();
-};
-
-
-V*v();
-f ()
-{
- return v( )->foo ();
-}
-
-/*
-
- egcs-1.1
-
-foo.cc: In function `int f()':
-foo.cc:6: label `b' used but not defined
-*/
-void
-f ()
-{
- bool b;
- if (b && && b)
- ;
-}
-***************
-
- * make GCC warn about ctor that leaves member vars uninitialised.
-
- * GNU diff 2.7: diff -rN does not see a new directory with empty file
-
- * glibc 2.0:
-
- f = fopen ("/dev/null", "r")
- assert (feof (f))
-
-3RD PARTY PROJECTS:
-
- * GNU patch
- - 'double-fix' mode: ignore identical fix, rather than suggest
- to revert patch direction when (more or less? exactly) the same
- thing is fixed
-
-PROJECTS
-
- * Scripts:
- - fix position of bar number
- - stack scripts in chords:
- % fingering: footing:
- < a-4 c-2 g-1 > < c-\ltoe e-\lheel >
- - script-spacing
- - slur parts as a script
- - stack parameterised scripts for fingering and footing:
-
- * convert-mudela:
- - automatically add a \version if not present.
- - better parsing
- - make smarter
- - convert-mudela -e empty.ly
-
- * emacs mudela-mode
- - should handle block comments too.
- - handle lexer modes (\header, \melodic, \lyric) etc.
- - indentation
- - notenames?
- - fontlock: \melodic \melodic
-
- * use properties for:
- - plet?
- - Staff_sym size
- - default tempo.
- - font size
- - bartypes (get rid of derived Span_bar_engravers)
- - cadenza mode?
-
- * page handling:
- - PS output
- - optimal pagebreaking.
-
- * Unicode support? -> man 7 unicode
- - 16 bit Strings
- - -u switch
- - detect of 16/8 bit files
- - examples to go with it.
-
- * Spring_spacer:
- - write a faster Spring_spacer (without matrices if possible)
- - relate energybound to linelen unitspace fontsize etc.
- - used fixed point fp?
-
- * \header
- - output header info to MIDI too.
-
- * a musical dictionary. See Documentation/vocabulary-*, other
- languages:
- - explanations
- - italian
- - german
- - dutch
- - swedish
- .. ?
-
- * chords
- - guitar chords (fret diagrams)
- - other chord name styles (american(?) style)
- - basso continuo
- - MIDI output?
-
- * Debug logs:
- - derive lily_stream, Dstream, texstream from ostream?
- - indentable stream as baseclass for TeX stream, lily stream, Dstream.
- - use dstream feature in mi2mu
- - integrate IO checking into stream class
-
- * input converters
- - NIFF?
- - ABC?
- - SMDL?
-
- * add to MIDI output:
- - tempo change
- - ornaments (and trills?)
- - repeat/volta
- - slurs
- - accents
- - dynamics
- - account for rhythmic position in measure
- - etc.
-
- * grace notes
- - make separate class for Grace_*_engravers
- (which is at Voice_gravs level)
- - make encapsulated spacing problems.
-
- * accidentals per Voice_group
-
- * Output class, handles : (smallish)
- - help text /(c) notice?
- - version line
- - warning /errors/progress
- - abort on error/warning; exit status
- - quiet/ignore-version options
- - logfile output
-
- * elaborate Staff_side baseclass:
- - scripts
- - text
- - slur start/end
-
- * PS
- - speed up PS code.
- - PS lines to .eps files
- - write custom prolog
-
- * Output an output format independent (ofi) typeset file; and
- make ofi2 TeX, MusiXTex, Display PostScript, PostScript,
- Ascii... interpreters. (difficult)
-
- - NIFF ?
- - Common Music Notation
- - PostScript output (esp. Beams, Slurs, etc)
- - Move all Score_elems, into libmutype.a
- - SGML
-
- * Documentation
- - Doc (C) stuff of sheet music
- - a better format? SGML? TeX? Info?
- - a better tutorial
-
- * more spanners (smallish)
- - Glissando
- - trill
-
- * Rewrite Stem, Beam and Rhythmic_grouping (hairy)
- - [c8. c32 c32]
- - doc on Rhythmic_grouping
- - general shaving on Beam and Stem
- - use plet grouping
- - separate visual from rhythmic info even more
- - beams over bars
-
- * lines:
- - Ledger lines, should be separate item: Ledger_lines, Ledger_lines
- - set different line sizes / thicknesses
- - beam stem showthrough, inter beam sizes (french vs german style)
-
- * Collisions
- - left/right note balls should be handled by Collision:
- < \multi 2; { \stem 1; <b c> } { <f as b> } >
-
- * Keys:
- - merge key{item} & localkey{item}?
- - spacing, national styles?
-
- * Support for TAB
- - redo Notehead to allow digits as heads
- - add a \tablature {} lexer mode for easy entering
-
- * should adjust stemlength for flag number.
-
- * breaking:
- - caching breakpoints
- - saving them
- - specify number of lines
-
-INPUTLANGUAGE
-
- * c4 4 4 4 for c4 c4 c4 c4?
-
- * neatly (and readably) expressing concurrent
- voices
-
- * <c f a>4 ?
-
- * Viola mode?
-
- @c c g e g
- for
- c g es g,
-
- @A c g e g
- for
- cis gis e gis
-
- * relative mode for pitch entering
-
- * configure pitch_byte
-
- * rest name configurable
-
-SMALLISH PROJECTS
-
- * limit memory usage; the full coriolan takes up too much resources.
-
- * fix confusing naming in Engraver vs Engraver_group_engraver (context)
-
- * progress when creating MIDI elts.
-
- * A range for context errors (eg. mark both { and }. )
-
- * lyric in staff (sharpsharp in staff, text below)
-
- * half sharps/flats
-
- * write Dynamic_line (to group dynamics horizontally)
-
- * use Real for all y positions.
- - use translate_axis( .. ,Y_AXIS) iso separate variables.
-
- * half-sharps, half-flats
-
- * adaptive accidental spacing.
-
- * handle EOF graciously in error messages.
-
- * declare notenametab?
-
- * midi esp.: use I32 iso int where 32 bits are needed (or assumed...)
-
- * stafftypes: voice names/ instrument names.
-
- * lily \tempo
-
- * C meter iso 4/4, idem for alla breve, etc.
-
- * textspanner: center position
-
- * % toe to bheel four to five
- % ^_u 4_5
- % -
- % --|x-- --|x--
- % --|--- --|---
- % --|--- --|---
- (where "to" is a tiny bow)
-
- * auxilliary file for caching info.
-
- * Text_crescendo
-
- * clean solution for staffsize in items.
-
- * revise calcideal
-
-IDEAS
-
- * Output data structures of Mudela in XML/SGML.
-
- * create libmudela, or liblily_frontend
-
- * move MIDI stuff (including Quantization) to a ANSI C libmidi library.
-
- * Spacing_request for manually adjusting spacing
-
- * caching breakpoints
-
- * used fixedpoint arithmetic for min. energy.
-
- * move towards incremental algorithms.
-
- * far fetched language ideas
- - design meta-language like TeX and Metafont
- - programming/macros input
-
- * versioning stuff (cvt mudela, mudela, etc.)
-
- * Klavarskribo?
-
- * dynamic loading of engravers?
-
-SMOBS:
-
-****************************************
-Han-Wen Nienhuys <hanwen@cs.uu.nl> writes:
-
-> mcmanus@IDT.NET writes:
-> > > I want different C++ objects (with scheme embedded) to be linked by
-> > > C++ pointers. I want to access these other objects from the Scheme
-> > > code, and I want access to these pointers from C++.
-> >
-> > You can do this with a combination of smob's and primitive functions,
-> > though it may not be be exactly what you wanted. You would have one
-> > smob for each class in your application, and then you would write a
-> > primitive function that would return the objects that are linked to a
-> > base object.
->
-> And the smob and the C++ class are interlinked? Like
->
-> class Foo_class {
-> Foo_smob *smob_ptr_;
-> }
->
-> struct Foo_smob {
-> Foo_class *class_ptr_
-> }
-
-Usually you can get away without having this interlinked structure.
-One piece of information you need when exporting objects to scheme is
-the smob tag for your class. You might store this value (a long) into
-a class static variable, or a file static variable. I'll use a class
-static variable in this example.
-
-I typically use code that works like this (untested code ahead):
-
-class Foo_class {
- static long *Foo_smob_tag;
- SCM obj; // representation as a scheme object, description comes later
-}
-
-// call this once on startup
-void init_Foo_class {
- static scm_smobfuns type_rec;
-
- type_rec.mark = foo_mark;
- type_rec.free = foo_free;
- type_rec.print = foo_display;
- type_rec.equalp = 0;
- Foo_class::Foo_smob_tag = new int(scm_new_smob(type_rec));
-}
-
-When you want to export an object to scheme, you put a pointer to the
-object itself in the cdr of the cell, and the tag in the car of the
-cell. The code looks like this:
-
-// Is this a Foo?
-static int
-foo_p(SCM obj)
-{
- return(SCM_NIMP(obj) && SCM_CAR(obj) == Foo_class::Foo_smob_tag);
-}
-
-// given a Scheme representation, return, a C++ representation
-static Foo_class *
-foo_unbox(SCM obj)
-{
- return((Foo_class*)SCM_CDR(obj));
-}
-
-// the SCM representation of the object is stored inside itself
-// this will become useful when destructor gets called
-static SCM
-foo_box(Foo_class *foo)
-{
- SCM_DEFER_INTS;
- SCM_NEWCELL(foo->obj);
- SCM_SETCAR(foo->obj, Foo_class::Foo_smob_tag);
- SCM_SETCDR(foo->obj, (SCM)foo);
- SCM_ALLOW_INTS;
- return foo->obj;
-}
-
-> C++ determines life time, so what is the strategy?
-
-What happens now when the destructor gets called? Lets set the cdr to
-NULL, and then check for that in all of the primitive functions that
-use your smob. We'll call this notion 'live'; a scheme object is
-'live' if the C++ representation still exists, it's dead if the C++
-object is gone. You can still have references to dead objects in
-scheme code; it's just an error to use them. This idea is stolen from
-Emacs's handling of buffers ('buffer-live-p' and friends).
-
-Add another function, foo_live_p:
-
-static int
-foo_live_p(SCM obj)
-{
- return(foo_p(obj) && SCM_CDR(obj) != NULL);
-}
-
-In you destructor, you need to do:
-
-~Foo_class()
-{
- SCM_CDR(this->obj, NULL);
-}
-
-When writing new primitives, now just check foo_live_p().
-
-I hope the above helps,
-
--russ
-
-
---
-"Even if you are on the right track, you'll get run over
-if you just sit there."
- --Will Rogers (1879-1935)
-
-***************************
-
-> I am still muddling along with integrating GUILE in LilyPond, and I
-> have a question. I want to replace an existing C++ implementation of
-> identifier tables by GUILE's code. I've managed to replace
->
-> Hash_table<String,Identifier*>
->
-> by
->
-> Hash_table<SCM, Identifier*>
->
-> and use interning and GUILE symbols for doing the identifier lookup.
-> But I'd like to use GUILE's hash tables as well, and that's were my
-> question comes in: is there an interface that allows me to iterate
-> through the entries of a GUILE hash table?
-
-I use the following, which should definitely be provided somewhere
-in guile, but isn't, AFAIK:
-
-(define (hash-table-for-each fn ht)
- (do ((i 0 (+ 1 i)))
- ((= i (vector-length ht)))
- (do ((alist (vector-ref ht i) (cdr alist)))
- ((null? alist) #t)
- (fn (car (car alist)) (cdr (car alist))))))
-
-(define (hash-table-map fn ht)
- (do ((i 0 (+ 1 i))
- (ret-ls '()))
- ((= i (vector-length ht)) (reverse ret-ls))
- (do ((alist (vector-ref ht i) (cdr alist)))
- ((null? alist) #t)
- (set! ret-ls (cons (fn (car (car alist)) (cdr (car alist))) ret-ls)))))
-
-If you want a C version, you can run the above code through hobbit, or
-tranlate it to C by hand.
-
--russ
-
-
---
-"Whenever you find yourself on the side of the majority, it is time to
-pause and reflect."
- -- Mark Twain
-***********************
+[see http://www.cs.uu.nl/people/hanwen/lily-devel/index.html]
projects / lilypond.git / blobdiff