-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
+# -*-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
-
-0.2:
- * junk embedded mf
-
-
-
-
- * ly2dvi seams to eat accents as in \'el\'egant
-
- * libtoolize flowerlib
- * shared lib
-
- * bf: abbrevbeam?
-
- * add full coriolan to website.
-
- * robustify Beam (in case of no stems, 32nd notes)
-
- * check for groff / troff/ nroff et
-
- * latex quirk?
-
- * use kpsepath to find all TeX dirs
- - configure.in
- - clean-fonts.sh
-
- * mudela-convert.
-
- * nicen examples:
- - remove all \multi
- - break-up heavily-nested score blocks
-
- * --metafont
-
- * disable spaces in TeX stuff
+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 }
- * handle ^C for tmp/file creation.
-
- * WWW mirror/archive for the mailing lists.
-
- * dots & rest collisions.
-
- * add a screenshot to the website. :)
-
- * documentation
- - introduction?
- - info?
- - LaTeX?
- - more manpages?
-
- * naming Mozarella, Madeira, Muella?
-
- * versioning for Feta
-
- * the warning about the negative slur/tie length appears twice
+ 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)
+*** The `3' in the meter key is a one or two pixels too thin (at 600dpi)
in the middle:
-
- * better hshift (dots, distance, head dependent)
-
- * stem len adjustable
-
-STUFF
- * clefs: The names I'd like are of the form
-
- [FGC]n{[_^]8} F, G or C clef, on nth line, subscripted
- or superscripted with an 8.
- So:
- G, G2, treble, (== current `violin') G clef on second line.
- F, F4, bass (== current `bass' ) F clef on fourth line
- G_8, G2_8 G clef on 2nd line, with 8 subscript
- G^8 G clef on 2nd line with 8 superscript
- C1, soprano (==current `soprano') C clef on first line.
- C2, (==current `mezzosoprano') C clef on second line
- C3, alto (==current `alto') C clef on third line
- C4, tenor (==current `tenor') C clef on fourth line
- C5 (==current `baritone') C clef on fifth line)
-
-
-
- * give Items/Spanners access to unbroken originals
-
- * scoping for properties
-
- { c4
- \multi 2 < { \stemup .. } { \stemdown .. } >
- c2
- }
-
- this modifies \stem for the c2
-
- * use properties for:
- - Text_style
- - default_octave
- - plet?
- - default_duration?
- - default abbreviation
- - Staff_sym size
- - default tempo.
- - font size
- - bartypes (get rid of derived Span_bar_engravers)
- - cadenza mode?
- - MIDI instrument
- - staff title
-
- * page handling:
- - PS output
- - optimal pagebreaking.
-
- * put errorlevel in Input class
-
- * AFM for font input?
-
-3RD PARTY BUGS:
- * tried egcs 1.0.2: failed on lily/stem.cc -> flower/include/interval.hh
- should narrow down and send bug report
-
- * xdvi: PS in magnifying glass.
-
- * Fix profiling. gprof bugreport?
-
-PROJECTS
-
- * Unicode support?
- - 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)
- - use straight LP to find minimal "fitting force"
- - relate energybound to linelen unitspace fontsize etc.
- - used fixed point fp
-
- * \header
- - output header info to MIDI too.
-
-
- * Makefile stuff:
- - shared lib on Solaris too.
-
- * Add mudela-output to Rosegarden.
-
- * a musical dictionary. See Documentation/vocabulary-*, other
-languages:
- - italian
- - german
- - dutch
- - swedish
+*** 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
- - chord names
- - basso continuo
- - Syntax/parser
- - MIDI output?
- - typesetting
-
- * integrate midi-elts from mi2mu and lily?
-
- * 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
- - repeat
- - slurs
- - dynamics etc.
-
- * grace notes
- - make separate class for Grace_*_engravers
+*** 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
-
- * Convert all ref/bib stuff into BibTeX.
+**** make encapsulated spacing problems.
- * 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
+*** accidentals per Voice_group
- * piano staff
+*** 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
+*** elaborate Staff_side baseclass:
+**** scripts
+**** text
+**** slur start/end
- * cautionary accidental
+*** PS
+**** speed up PS code.
+**** PS lines to .eps files
+**** write custom prolog
- * Output an output format independent (ofi) typeset file; and
+*** 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
-
- * Documentation
- - Doc Mutopia (Music To The People)
- - Doc (C) stuff of sheet music
- - a better format? SGML? TeX? Info?
- - a tutorial
-
- * TeX spanners , use texbeam.cc as an example (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
-
- * Redo fonts
- - adapt for multiple font sizes.
-
- * 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:
+**** 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}?
- - do conventional keys (C G A, F B E, a e fis, d as des, etc ),
- besides lists of flats/sharps, possibly via declaration
- - key transposition.
- - key undo: \key bes; .. . \key; should print natural
- - special key: \key bes 'b bis';
- - 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
- - penalties
- - specify number of lines
-
- * Rhythmic staff.
-
- * multibar rests
-
- * markers
+*** 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
-INPUTLANGUAGE
+*** should adjust stemlength for flag number.
- * c4 4 4 4 for c4 c4 c4 c4?
+*** breaking:
+**** caching breakpoints
+**** saving them
+**** specify number of lines
+** INPUTLANGUAGE
- * neatly (and readably) expressing concurrent
+*** c4 4 4 4 for c4 c4 c4 c4?
+*** neatly (and readably) expressing concurrent
voices
-
- * <c f a>4 ?
-
- * Viola mode?
+*** <c f a>4 ?
+*** Viola mode?
@c c g e g
for
@A c g e g
for
cis gis e gis
+*** relative mode for pitch entering
+*** configure pitch_byte
+*** rest name configurable
- * relative mode for pitch entering
-
- * bracket (bracketplets)
-
- * configure pitch_byte
-
- * rest name configurable
-
- * Raw request syntax
-SMALLISH PROJECTS
+** SMALLISH PROJECTS
- * progress when creating MIDI elts.
+*** limit memory usage; the full coriolan takes up too much resources.
- * A range for context errors (eg. mark both { and }. )
+*** fix confusing naming in Engraver vs Engraver_group_engraver (context)
- * lyric in staff (sharpsharp in staff, text below)
+*** progress when creating MIDI elts.
- * write Dynamic_line (to group dynamics horizontally)
+*** A range for context errors (eg. mark both { and }. )
- * use Real for all y positions.
- - use translate_axis( .. ,Y_AXIS)
+*** lyric in staff (sharpsharp in staff, text below)
- * half-sharps, half-flats
+*** half sharps/flats
- * adaptive accidental spacing.
+*** write Dynamic_line (to group dynamics horizontally)
- * handle EOF graciously in error messages.
+*** use Real for all y positions.
- * caching Item/spanner dimensions.
+*** half-sharps, half-flats
- * centered whole rest
+*** adaptive accidental spacing.
- * qtor, btor, mtor-> tor( QUIET_ver ), tor( DEBUG_ver ), etc.
- - use tors feature in lily (?)
+*** handle EOF graciously in error messages.
- * declare notenametab?
+*** declare notenametab?
- * midi esp.: use I32 iso int where 32 bits are needed (or assumed...)
+*** midi esp.: use I32 iso int where 32 bits are needed (or assumed...)
- * Flower types:
- - A decent scalar type
- - String hash
- - Pointer hash
+*** stafftypes: voice names/ instrument names.
- * binsearch/hash for identifiers
+*** lily \tempo
- * stafftypes: voice names/ instrument names.
+*** C meter iso 4/4, idem for alla breve, etc.
- * TeX stuff:
- - Decent TeX titledefs (\tempo, \metron, etc. )
- - decent TeX page layout
-
- * lily \tempo
-
- * C meter iso 4/4, idem for alla breve, etc.
-
- * textspanner: center position
-
- * Brackets
-
- * Scripts:
- - 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:
+*** textspanner: center position
- % toe to bheel four to five
+ * % 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
-
- * volta
-
-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.
-
- * use an embedded language: Python, Scheme
- for:
- - Score_elems
- - Engraver
- - Translators
- - Complex mudela?
-
- * y -dims in internote? Staff-space? X-dimensions?
-
- * Spacing_request for manually adjusting spacing
-
- * caching breakpoints
-
- * #c <-> cis
-
- * breath marks
-
- * used fixedpoint arithmetic for min. energy.
-
- * move towards incremental algorithms.
-
- * far fetched language ideas
- - design meta-language like TeX and Metafont
- - programming/macros input
-
- * Global type registration.
-
- My_class * p = create_object( My_class )
- Type t = get_type ( *p );
- if ( t <= get_type( q ))
- ..
-
- * versioning stuff (cvt mudela, mudela, etc.)
-
- * a real convert-mudela
-
- * dots into separate item.
-
- * use String iso Text_def for lyrics.
-
- * Klavarskribo?
+*** 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
- * lyrics in chords still fuck up.
- * pushgroup/popgroup
- * Use hooks/dependency graphs for properties
projects / lilypond.git / blobdiff