-# -*-outline-*-
-* GNU LilyPond TODO
-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
-
-** BUGS
-*** .ly files
-**** input/praeludium-fuga-E.ly
-**** mutopia/J.S.Bach/wtk1-fugue2.ly
-**** fix: text on rests: rediculous dims
-*** fix midi output:
-**** default duration? d
- duration must be not entered explicitely on first note.
-*** fix singleStaffBracket
-*** \shape 1st dim skipped?
-*** 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?)
-*** fix dynamics decently, ie. use kerning & ligatures.
-*** fix "I've been drinking too much"
-*** support_l_arr_ empty in staff-margin's G_staff_side_item
-*** remove old preformats in RPM
-*** declaring \score
-*** is \break broken? input/test/hara-kiri.ly
-*** fix OrchestralScore and Hara-kiri (i.e., fix Coriolan)
-
-** TODO before 1.2
-*** do scaled fonts.
-*** profile atom smobs
-*** make ly2dvi test page.
-*** Try to use Killing_cons iso. Pointer_list
-*** make dependencies () a virtual function.
-*** fix Repeated_music_iterator::ok() (constness.)
-*** one big ly2dvi input that includes *all* tests.
-*** Don't use boolean properties (0,1), instead check existence
-of property.
-*** store req -> element, element -> element causes for warnings
-*** 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
-*** sort out directory stuff.
-**** --prefix option?
-**** -I option per filetype?
-**** kpathsea?
-*** todo doc left/rightbeamcount
-*** doc Single_malt_grouping_item
-*** ly2dvi/lilypond logfile.
-*** 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
-*** collisions/voices \voiceone \voicetwo are broken; see
-*** 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] }
-*** repeat bars: need distance after ":|" and before "|:"
-** Summary of minor spelling irregularities:
-*** capitalization/use of underscores in property names
-*** fix SkipBars -> skipBars
-
-*** 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 }
-*** ly2dvi
-**** bottomnote for ly2dvi
-**** cf'able ly2dvi tagline.
-**** deps for ly2dvi
-** 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
-*** 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
-*** 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:
-*** make GCC warn about ctor that leaves member vars uninitialised.
-*** 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.
-
-*** 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