B.15 Funciones de Scheme

Function: dispatcher x

Is x a Dispatcher object?

Function: listener x

Is x a Listener object?

Function: ly:add-file-name-alist alist

Add mappings for error messages from alist.

Function: ly:add-interface a b c

Add an interface description.

Function: ly:add-listener list disp cl

Add the listener list to the dispatcher disp. Whenever disp hears an event of class cl, it is forwarded to list.

Function: ly:add-option sym val description

Add a program option sym with default val.

Function: ly:all-grob-interfaces

Get a hash table with all interface descriptions.

Function: ly:all-options

Get all option settings in an alist.

Function: ly:all-stencil-expressions

Return all symbols recognized as stencil expressions.

Function: ly:assoc-get key alist default-value

Return value if key in alist, else default-value (or #f if not specified).

Function: ly:book-add-bookpart! book-smob book-part

Add book_part to book-smob book part list.

Function: ly:book-add-score! book-smob score

Add score to book-smob score list.

Function: ly:book-process book-smob default-paper default-layout output

Print book. output is passed to the backend unchanged. For example, it may be a string (for file based outputs) or a socket (for network based output).

Function: ly:book-process-to-systems book-smob default-paper default-layout output

Print book. output is passed to the backend unchanged. For example, it may be a string (for file based outputs) or a socket (for network based output).

Function: ly:box? x

Is x a Box object?

Function: ly:bp num

num bigpoints (1/72th inch).

Function: ly:bracket a iv t p

Make a bracket in direction a. The extent of the bracket is given by iv. The wings protrude by an amount of p, which may be negative. The thickness is given by t.

Function: ly:broadcast disp ev

Send the stream event ev to the dispatcher disp.

Function: ly:camel-case->lisp-identifier name-sym

Convert FooBar_Bla to foo-bar-bla style symbol.

Function: ly:chain-assoc-get key achain dfault

Return value for key from a list of alists achain. If no entry is found, return dfault or #f if no dfault is specified.

Function: ly:clear-anonymous-modules

Plug a GUILE 1.6 and 1.7 memory leak by breaking a weak reference pointer cycle explicitly.

Function: ly:cm num

num cm.

Function: ly:command-line-code

The Scheme code specified on command-line with ‘-e’.

Function: ly:command-line-options

The Scheme options specified on command-line with ‘-d’.

Function: ly:command-line-verbose?

Was be_verbose_global set?

Function: ly:connect-dispatchers to from

Make the dispatcher to listen to events from from.

Function: ly:context-event-source context

Return event-source of context context.

Function: ly:context-events-below context

Return a stream-distributor that distributes all events from context and all its subcontexts.

Function: ly:context-find context name

Find a parent of context that has name or alias name. Return #f if not found.

Function: ly:context-grob-definition context name

Return the definition of name (a symbol) within context as an alist.

Function: ly:context-id context

Return the ID string of context, i.e., for \context Voice = one … return the string one.

Function: ly:context-name context

Return the name of context, i.e., for \context Voice = one … return the symbol Voice.

Function: ly:context-now context

Return now-moment of context context.

Function: ly:context-parent context

Return the parent of context, #f if none.

Function: ly:context-property c name

Return the value of name from context c.

Function: ly:context-property-where-defined context name

Return the context above context where name is defined.

Function: ly:context-pushpop-property context grob eltprop val

Do a single \override or \revert operation in context. The grob definition grob is extended with eltprop (if val is specified) or reverted (if unspecified).

Function: ly:context-set-property! context name val

Set value of property name in context context to val.

Function: ly:context-unset-property context name

Unset value of property name in context context.

Function: ly:context? x

Is x a Context object?

Function: ly:default-scale

Get the global default scale.

Function: ly:dimension? d

Return d as a number. Used to distinguish length variables from normal numbers.

Function: ly:dir? s

A type predicate. The direction s is -1, 0 or 1, where -1 represents left or down and 1 represents right or up.

Function: ly:duration->string dur

Convert dur to a string.

Function: ly:duration-dot-count dur

Extract the dot count from dur.

Function: ly:duration-factor dur

Extract the compression factor from dur. Return it as a pair.

Function: ly:duration-length dur

The length of the duration as a moment.

Function: ly:duration-log dur

Extract the duration log from dur.

Function: ly:duration<? p1 p2

Is p1 shorter than p2?

Function: ly:duration? x

Is x a Duration object?

Function: ly:effective-prefix

Return effective prefix.

Function: ly:error str rest

A Scheme callable function to issue the error str. The error is formatted with format and rest.

Function: ly:eval-simple-closure delayed closure scm-start scm-end

Evaluate a simple closure with the given delayed argument. If scm-start and scm-end are defined, evaluate it purely with those start and end points.

Function: ly:event-deep-copy m

Copy m and all sub expressions of m.

Function: ly:event-property sev sym

Get the property sym of stream event mus. If sym is undefined, return '().

Function: ly:event-set-property! ev sym val

Set property sym in event ev to val.

Function: ly:expand-environment str

Expand $VAR and ${VAR} in str.

Function: ly:export arg

Export a Scheme object to the parser so it is treated as an identifier.

Function: ly:find-accidentals-simple keysig pitch-scm barnum laziness octaveness

Checks the need for an accidental and a ‘restore’ accidental against a key signature. The laziness is the number of bars for which reminder accidentals are used (ie. if laziness is zero, we only cancel accidentals in the same bar; if laziness is three, we cancel accidentals up to three bars after they first appear. octaveness is either 'same-octave or 'any-octave and it specifies whether accidentals should be canceled in different octaves.

Function: ly:find-file name

Return the absolute file name of name, or #f if not found.

Function: ly:font-config-add-directory dir

Add directory dir to FontConfig.

Function: ly:font-config-add-font font

Add font font to FontConfig.

Function: ly:font-config-display-fonts

Dump a list of all fonts visible to FontConfig.

Function: ly:font-config-get-font-file name

Get the file for font name.

Function: ly:font-design-size font

Given the font metric font, return the design size, relative to the current output-scale.

Function: ly:font-file-name font

Given the font metric font, return the corresponding file name.

Function: ly:font-get-glyph font name

Return a stencil from font for the glyph named name. If the glyph is not available, return an empty stencil.

Note that this command can only be used to access glyphs from fonts loaded with ly:system-font-load; currently, this means either the Emmentaler or Aybabtu fonts, corresponding to the font encodings fetaMusic and fetaBraces, respectively.

Function: ly:font-glyph-name-to-charcode font name

Return the character code for glyph name in font.

Note that this command can only be used to access glyphs from fonts loaded with ly:system-font-load; currently, this means either the Emmentaler or Aybabtu fonts, corresponding to the font encodings fetaMusic and fetaBraces, respectively.

Function: ly:font-glyph-name-to-index font name

Return the index for name in font.

Note that this command can only be used to access glyphs from fonts loaded with ly:system-font-load; currently, this means either the Emmentaler or Aybabtu fonts, corresponding to the font encodings fetaMusic and fetaBraces, respectively.

Function: ly:font-index-to-charcode font index

Return the character code for index in font.

Note that this command can only be used to access glyphs from fonts loaded with ly:system-font-load; currently, this means either the Emmentaler or Aybabtu fonts, corresponding to the font encodings fetaMusic and fetaBraces, respectively.

Function: ly:font-magnification font

Given the font metric font, return the magnification, relative to the current output-scale.

Function: ly:font-metric? x

Is x a Font_metric object?

Function: ly:font-name font

Given the font metric font, return the corresponding name.

Function: ly:font-sub-fonts font

Given the font metric font of an OpenType font, return the names of the subfonts within font.

Function: ly:format str rest

LilyPond specific format, supporting ~a and ~[0-9]f.

Function: ly:format-output context

Given a global context in its final state, process it and return the Music_output object in its final state.

Function: ly:get-all-function-documentation

Get a hash table with all LilyPond Scheme extension functions.

Function: ly:get-all-translators

Return a list of all translator objects that may be instantiated.

Function: ly:get-glyph font index

Retrieve a stencil for the glyph numbered index in font.

Note that this command can only be used to access glyphs from fonts loaded with ly:system-font-load; currently, this means either the Emmentaler or Aybabtu fonts, corresponding to the font encodings fetaMusic and fetaBraces, respectively.

Function: ly:get-listened-event-classes

Return a list of all event classes that some translator listens to.

Function: ly:get-option var

Get a global option setting.

Function: ly:gettext original

A Scheme wrapper function for gettext.

Function: ly:grob-alist-chain grob global

Get an alist chain for grob grob, with global as the global default. If unspecified, font-defaults from the layout block is taken.

Function: ly:grob-array-length grob-arr

Return the length of grob-arr.

Function: ly:grob-array-ref grob-arr index

Retrieve the indexth element of grob-arr.

Function: ly:grob-array? x

Is x a Grob_array object?

Function: ly:grob-basic-properties grob

Get the immutable properties of grob.

Function: ly:grob-common-refpoint grob other axis

Find the common refpoint of grob and other for axis.

Function: ly:grob-common-refpoint-of-array grob others axis

Find the common refpoint of grob and others (a grob-array) for axis.

Function: ly:grob-default-font grob

Return the default font for grob gr.

Function: ly:grob-extent grob refp axis

Get the extent in axis direction of grob relative to the grob refp.

Function: ly:grob-interfaces grob

Return the interfaces list of grob grob.

Function: ly:grob-layout grob

Get \layout definition from grob grob.

Function: ly:grob-object grob sym

Return the value of a pointer in grob g of property sym. It returns '() (end-of-list) if sym is undefined in g.

Function: ly:grob-original grob

Return the unbroken original grob of grob.

Function: ly:grob-parent grob axis

Get the parent of grob. axis is 0 for the X-axis, 1 for the Y-axis.

Function: ly:grob-pq<? a b

Compare two grob priority queue entries. This is an internal function.

Function: ly:grob-properties grob

Get the mutable properties of grob.

Function: ly:grob-property grob sym deflt

Return the value of a value in grob g of property sym. It returns '() (end-of-list) or deflt (if specified) if sym is undefined in g.

Function: ly:grob-property-data grob sym

Retrieve sym for grob but don’t process callbacks.

Function: ly:grob-relative-coordinate grob refp axis

Get the coordinate in axis direction of grob relative to the grob refp.

Function: ly:grob-robust-relative-extent grob refp axis

Get the extent in axis direction of grob relative to the grob refp, or (0,0) if empty.

Function: ly:grob-script-priority-less a b

Compare two grobs by script priority. For internal use.

Function: ly:grob-set-property! grob sym val

Set sym in grob grob to value val.

Function: ly:grob-staff-position sg

Return the Y-position of sg relative to the staff.

Function: ly:grob-suicide! grob

Kill grob.

Function: ly:grob-system grob

Return the system grob of grob.

Function: ly:grob-translate-axis! grob d a

Translate g on axis a over distance d.

Function: ly:grob? x

Is x a Grob object?

Function: ly:gulp-file name size

Read the file name, and return its contents in a string. The file is looked up using the search path.

Function: ly:hash-table-keys tab

Return a list of keys in tab.

Function: ly:inch num

num inches.

Function: ly:input-both-locations sip

Return input location in sip as (file-name first-line first-column last-line last-column).

Function: ly:input-file-line-char-column sip

Return input location in sip as (file-name line char column).

Function: ly:input-location? x

Is x an input-location?

Function: ly:input-message sip msg rest

Print msg as a GNU compliant error message, pointing to the location in sip. msg is interpreted similar to format’s argument, using rest.

Function: ly:interpret-music-expression mus ctx

Interpret the music expression mus in the global context ctx. The context is returned in its final state.

Function: ly:interpret-stencil-expression expr func arg1 offset

Parse expr, feed bits to func with first arg arg1 having offset offset.

Function: ly:intlog2 d

The 2-logarithm of 1/d.

Function: ly:is-listened-event-class sym

Is sym a listened event class?

Function: ly:item-break-dir it

The break status direction of item it. -1 means end of line, 0 unbroken, and 1 beginning of line.

Function: ly:item? g

Is g an Item object?

Function: ly:iterator? x

Is x a Music_iterator object?

Function: ly:lexer-keywords lexer

Return a list of (KEY . CODE) pairs, signifying the LilyPond reserved words list.

Function: ly:lily-lexer? x

Is x a Lily_lexer object?

Function: ly:lily-parser? x

Is x a Lily_parser object?

Function: ly:make-book paper header scores

Make a \book of paper and header (which may be #f as well) containing \scores.

Function: ly:make-book-part scores

Make a \bookpart containing \scores.

Function: ly:make-dispatcher

Return a newly created dispatcher.

Function: ly:make-duration length dotcount num den

length is the negative logarithm (base 2) of the duration: 1 is a half note, 2 is a quarter note, 3 is an eighth note, etc. The number of dots after the note is given by the optional argument dotcount.

The duration factor is optionally given by num and den.

A duration is a musical duration, i.e., a length of time described by a power of two (whole, half, quarter, etc.) and a number of augmentation dots.

Function: ly:make-global-context output-def

Set up a global interpretation context, using the output block output_def. The context is returned.

Function: ly:make-global-translator global

Create a translator group and connect it to the global context global. The translator group is returned.

Function: ly:make-listener callback

Create a listener. Any time the listener hears an object, it will call callback with that object.

callback should take exactly one argument.

Function: ly:make-moment n d gn gd

Create the rational number with main timing n/d, and optional grace timing gn/gd.

A moment is a point in musical time. It consists of a pair of rationals (mg), where m is the timing for the main notes, and g the timing for grace notes. In absence of grace notes, g is zero.

Function: ly:make-music props

Make a C++ Music object and initialize it with props.

This function is for internal use and is only called by make-music, which is the preferred interface for creating music objects.

Function: ly:make-music-function signature func

Make a function to process music, to be used for the parser. func is the function, and signature describes its arguments. signature is a list containing either ly:music? predicates or other type predicates.

Function: ly:make-output-def

Make an output definition.

Function: ly:make-page-label-marker label

Return page marker with label.

Function: ly:make-page-permission-marker symbol permission

Return page marker with page breaking and turning permissions.

Function: ly:make-pango-description-string chain size

Make a PangoFontDescription string for the property alist chain at size size.

Function: ly:make-paper-outputter port format

Create an outputter that evaluates within output-format, writing to port.

Function: ly:make-pitch octave note alter

octave is specified by an integer, zero for the octave containing middle C. note is a number indexing the global default scale, with 0 corresponding to pitch C and 6 usually corresponding to pitch B. alter is a rational number of 200-cent whole tones for alteration.

Function: ly:make-prob type init rest

Create a Prob object.

Function: ly:make-scale steps

Create a scale. The argument is a vector of rational numbers, each of which represents the number of 200 cent tones of a pitch above the tonic.

Function: ly:make-score music

Return score with music encapsulated in score.

Function: ly:make-simple-closure expr

Make a simple closure. expr should be form of (func a1 A2 …), and will be invoked as (func delayed-arg a1 a2 …).

Function: ly:make-stencil expr xext yext

Stencils are device independent output expressions. They carry two pieces of information:

  1. A specification of how to print this object. This specification is processed by the output backends, for example ‘scm/output-ps.scm’.
  2. The vertical and horizontal extents of the object, given as pairs. If an extent is unspecified (or if you use (1000 . -1000) as its value), it is taken to be empty.
Function: ly:make-stream-event cl proplist

Create a stream event of class cl with the given mutable property list.

Function: ly:message str rest

A Scheme callable function to issue the message str. The message is formatted with format and rest.

Function: ly:minimal-breaking pb

Break (pages and lines) the Paper_book object pb without looking for optimal spacing: stack as many lines on a page before moving to the next one.

Function: ly:mm num

num mm.

Function: ly:module->alist mod

Dump the contents of module mod as an alist.

Function: ly:module-copy dest src

Copy all bindings from module src into dest.

Function: ly:modules-lookup modules sym def

Look up sym in the list modules, returning the first occurence. If not found, return def or #f if def isn’t specified.

Function: ly:moment-add a b

Add two moments.

Function: ly:moment-div a b

Divide two moments.

Function: ly:moment-grace-denominator mom

Extract denominator from grace timing.

Function: ly:moment-grace-numerator mom

Extract numerator from grace timing.

Function: ly:moment-main-denominator mom

Extract denominator from main timing.

Function: ly:moment-main-numerator mom

Extract numerator from main timing.

Function: ly:moment-mod a b

Modulo of two moments.

Function: ly:moment-mul a b

Multiply two moments.

Function: ly:moment-sub a b

Subtract two moments.

Function: ly:moment<? a b

Compare two moments.

Function: ly:moment? x

Is x a Moment object?

Function: ly:music-compress m factor

Compress music object m by moment factor.

Function: ly:music-deep-copy m

Copy m and all sub expressions of m.

Function: ly:music-duration-compress mus fact

Compress mus by factor fact, which is a Moment.

Function: ly:music-duration-length mus

Extract the duration field from mus and return the length.

Function: ly:music-function-extract x

Return the Scheme function inside x.

Function: ly:music-function? x

Is x a music-function?

Function: ly:music-length mus

Get the length of music expression mus and return it as a Moment object.

Function: ly:music-list? lst

Type predicate: Return true if lst is a list of music objects.

Function: ly:music-mutable-properties mus

Return an alist containing the mutable properties of mus. The immutable properties are not available, since they are constant and initialized by the make-music function.

Function: ly:music-output? x

Is x a Music_output object?

Function: ly:music-property mus sym dfault

Get the property sym of music expression mus. If sym is undefined, return '().

Function: ly:music-set-property! mus sym val

Set property sym in music expression mus to val.

Function: ly:music-transpose m p

Transpose m such that central C is mapped to p. Return m.

Function: ly:music? obj

Type predicate.

Function: ly:note-head::stem-attachment font-metric glyph-name

Get attachment in font-metric for attaching a stem to notehead glyph-name.

Function: ly:number->string s

Convert num to a string without generating many decimals.

Function: ly:optimal-breaking pb

Optimally break (pages and lines) the Paper_book object pb to minimize badness in bother vertical and horizontal spacing.

Function: ly:option-usage

Print ly:set-option usage.

Function: ly:otf->cff otf-file-name

Convert the contents of an OTF file to a CFF file, returning it as a string.

Function: ly:otf-font-glyph-info font glyph

Given the font metric font of an OpenType font, return the information about named glyph glyph (a string).

Function: ly:otf-font-table-data font tag

Extract a table tag from font. Return empty string for non-existent tag.

Function: ly:otf-font? font

Is font an OpenType font?

Function: ly:otf-glyph-list font

Return a list of glyph names for font.

Function: ly:output-def-clone def

Clone output definition def.

Function: ly:output-def-lookup pap sym def

Look up sym in the pap output definition (e.g., \paper). Return the value or def (which defaults to '()) if undefined.

Function: ly:output-def-parent def

Get the parent output definition of def.

Function: ly:output-def-scope def

Get the variable scope inside def.

Function: ly:output-def-set-variable! def sym val

Set an output definition def variable sym to val.

Function: ly:output-def? def

Is def a layout definition?

Function: ly:output-description output-def

Return the description of translators in output-def.

Function: ly:output-formats

Formats passed to ‘--format’ as a list of strings, used for the output.

Function: ly:outputter-close outputter

Close port of outputter.

Function: ly:outputter-dump-stencil outputter stencil

Dump stencil expr onto outputter.

Function: ly:outputter-dump-string outputter str

Dump str onto outputter.

Function: ly:outputter-output-scheme outputter expr

Eval expr in module of outputter.

Function: ly:outputter-port outputter

Return output port for outputter.

Function: ly:page-marker? x

Is x a Page_marker object?

Function: ly:page-turn-breaking pb

Optimally break (pages and lines) the Paper_book object pb such that page turns only happen in specified places, returning its pages.

Function: ly:pango-font-physical-fonts f

Return alist of (ps-name file-name font-index) lists for Pango font f.

Function: ly:pango-font? f

Is f a pango font?

Function: ly:paper-book-pages pb

Return pages in book pb.

Function: ly:paper-book-paper pb

Return pages in book pb.

Function: ly:paper-book-performances paper-book

Return performances in book paper-book.

Function: ly:paper-book-scopes book

Return scopes in layout book book.

Function: ly:paper-book-systems pb

Return systems in book pb.

Function: ly:paper-book? x

Is x a Paper_book object?

Function: ly:paper-fonts bp

Return fonts from the \paper block bp.

Function: ly:paper-get-font paper-smob chain

Return a font metric satisfying the font-qualifiers in the alist chain chain. (An alist chain is a list of alists, containing grob properties.)

Function: ly:paper-get-number layout-smob name

Return the layout variable name.

Function: ly:paper-outputscale bp

Get output-scale for bp.

Function: ly:paper-score-paper-systems paper-score

Return vector of paper_system objects from paper-score.

Function: ly:paper-system-minimum-distance sys1 sys2

Measure the minimum distance between these two paper-systems, using their stored skylines if possible and falling back to their extents otherwise.

Function: ly:paper-system? obj

Type predicate.

Function: ly:parse-file name

Parse a single .ly file. Upon failure, throw ly-file-failed key.

Function: ly:parser-clear-error parser

Clear the error flag for the parser.

Function: ly:parser-clone parser-smob

Return a clone of parser-smob.

Function: ly:parser-define! parser-smob symbol val

Bind symbol to val in parser-smob’s module.

Function: ly:parser-error parser msg input

Display an error message and make the parser fail.

Function: ly:parser-has-error? parser

Does parser have an error flag?

Function: ly:parser-lexer parser-smob

Return the lexer for parser-smob.

Function: ly:parser-lookup parser-smob symbol

Look up symbol in parser-smob’s module. Return '() if not defined.

Function: ly:parser-output-name parser

Return the base name of the output file.

Function: ly:parser-parse-string parser-smob ly-code

Parse the string ly-code with parser-smob. Upon failure, throw ly-file-failed key.

Function: ly:parser-set-note-names parser names

Replace current note names in parser. names is an alist of symbols. This only has effect if the current mode is notes.

Function: ly:performance-write performance filename

Write performance to filename.

Function: ly:pfb->pfa pfb-file-name

Convert the contents of a PFB file to PFA.

Function: ly:pitch-alteration pp

Extract the alteration from pitch pp.

Function: ly:pitch-diff pitch root

Return pitch delta such that pitch transposed by delta equals root.

Function: ly:pitch-negate p

Negate p.

Function: ly:pitch-notename pp

Extract the note name from pitch pp.

Function: ly:pitch-octave pp

Extract the octave from pitch pp.

Function: ly:pitch-quartertones pp

Calculate the number of quarter tones of pp from middle C.

Function: ly:pitch-semitones pp

Calculate the number of semitones of pp from middle C.

Function: ly:pitch-steps p

Number of steps counted from middle C of the pitch p.

Function: ly:pitch-transpose p delta

Transpose p by the amount delta, where delta is relative to middle C.

Function: ly:pitch<? p1 p2

Is p1 lexicographically smaller than p2?

Function: ly:pitch? x

Is x a Pitch object?

Function: ly:position-on-line? sg spos

Return whether pos is on a line of the staff associated with the the grob sg (even on an extender line).

Function: ly:prob-immutable-properties prob

Retrieve an alist of mutable properties.

Function: ly:prob-mutable-properties prob

Retrieve an alist of mutable properties.

Function: ly:prob-property obj sym dfault

Return the value for sym.

Function: ly:prob-property? obj sym

Is boolean prop sym set?

Function: ly:prob-set-property! obj sym value

Set property sym of obj to value.

Function: ly:prob-type? obj type

Is obj the specified prob-type?

Function: ly:prob? x

Is x a Prob object?

Function: ly:programming-error str rest

A Scheme callable function to issue the internal warning str. The message is formatted with format and rest.

Function: ly:progress str rest

A Scheme callable function to print progress str. The message is formatted with format and rest.

Function: ly:property-lookup-stats sym

Return hash table with a property access corresponding to sym. Choices are prob, grob, and context.

Function: ly:protects

Return hash of protected objects.

Function: ly:pt num

num printer points.

Function: ly:register-stencil-expression symbol

Add symbol as head of a stencil expression.

Function: ly:relative-group-extent elements common axis

Determine the extent of elements relative to common in the axis direction.

Function: ly:reset-all-fonts

Forget all about previously loaded fonts.

Function: ly:round-filled-box xext yext blot

Make a Stencil object that prints a black box of dimensions xext, yext and roundness blot.

Function: ly:round-filled-polygon points blot

Make a Stencil object that prints a black polygon with corners at the points defined by points (list of coordinate pairs) and roundness blot.

Function: ly:run-translator mus output-def

Process mus according to output-def. An interpretation context is set up, and mus is interpreted with it. The context is returned in its final state.

Optionally, this routine takes an object-key to to uniquely identify the score block containing it.

Function: ly:score-add-output-def! score def

Add an output definition def to score.

Function: ly:score-embedded-format score layout

Run score through layout (an output definition) scaled to correct output-scale already, returning a list of layout-lines. This function takes an optional Object_key argument.

Function: ly:score-error? score

Was there an error in the score?

Function: ly:score-header score

Return score header.

Function: ly:score-music score

Return score music.

Function: ly:score-output-defs score

All output definitions in a score.

Function: ly:score-set-header! score module

Set the score header.

Function: ly:score? x

Is x a Score object?

Function: ly:set-default-scale scale

Set the global default scale. This determines the tuning of pitches with no accidentals or key signatures. The first pitch is C. Alterations are calculated relative to this scale. The number of pitches in this scale determines the number of scale steps that make up an octave. Usually the 7-note major scale.

Function: ly:set-grob-modification-callback cb

Specify a procedure that will be called every time LilyPond modifies a grob property. The callback will receive as arguments the grob that is being modified, the name of the C++ file in which the modification was requested, the line number in the C++ file in which the modification was requested, the name of the function in which the modification was requested, the property to be changed, and the new value for the property.

Function: ly:set-middle-C! context

Set the middleCPosition variable in context based on the variables middleCClefPosition and middleCOffset.

Function: ly:set-option var val

Set a program option.

Function: ly:set-point-and-click what

Deprecated.

Function: ly:set-property-cache-callback cb

Specify a procedure that will be called whenever lilypond calculates a callback function and caches the result. The callback will receive as arguments the grob whose property it is, the name of the property, the name of the callback that calculated the property, and the new (cached) value of the property.

Function: ly:simple-closure? clos

Type predicate.

Function: ly:skyline-pair? x

Is x a Skyline_pair object?

Function: ly:skyline? x

Is x a Skyline object?

Function: ly:smob-protects

Return LilyPond’s internal smob protection list.

Function: ly:solve-spring-rod-problem springs rods length ragged

Solve a spring and rod problem for count objects, that are connected by count-1 springs, and an arbitrary number of rods. count is implicitly given by springs and rods. The springs argument has the format (ideal, inverse_hook) and rods is of the form (idx1, idx2, distance).

length is a number, ragged a boolean.

The function returns a list containing the force (positive for stretching, negative for compressing and #f for non-satisfied constraints) followed by spring-count+1 positions of the objects.

Function: ly:source-file? x

Is x a Source_file object?

Function: ly:spanner-bound slur dir

Get one of the bounds of slur. dir is -1 for left, and 1 for right.

Function: ly:spanner-broken-into spanner

Return broken-into list for spanner.

Function: ly:spanner? g

Is g a spanner object?

Function: ly:staff-symbol-line-thickness grob

Returns the line-thickness of the staff associated with grob.

Function: ly:start-environment

Return the environment (a list of strings) that was in effect at program start.

Function: ly:stderr-redirect file-name mode

Redirect stderr to file-name, opened with mode.

Function: ly:stencil-add args

Combine stencils. Takes any number of arguments.

Function: ly:stencil-aligned-to stil axis dir

Align stil using its own extents. dir is a number. -1 and 1 are left and right, respectively. Other values are interpolated (so 0 means the center).

Function: ly:stencil-combine-at-edge first axis direction second padding minimum

Construct a stencil by putting second next to first. axis can be 0 (x-axis) or 1 (y-axis). direction can be -1 (left or down) or 1 (right or up). The stencils are juxtaposed with padding as extra space. If this puts the reference points closer than minimum, they are moved by the latter amount. first and second may also be '() or #f.

Function: ly:stencil-empty? stil

Return whether stil is empty.

Function: ly:stencil-expr stil

Return the expression of stil.

Function: ly:stencil-extent stil axis

Return a pair of numbers signifying the extent of stil in axis direction (0 or 1 for x and y axis, respectively).

Function: ly:stencil-fonts s

Analyze s, and return a list of fonts used in s.

Function: ly:stencil-in-color stc r g b

Put stc in a different color.

Function: ly:stencil-rotate stil angle x y

Return a stencil stil rotated angle degrees around the relative offset (x, y). E.g. an offset of (-1, 1) will rotate the stencil around the left upper corner.

Function: ly:stencil-rotate-absolute stil angle x y

Return a stencil stil rotated angle degrees around point (x, y), given in absolute coordinates.

Function: ly:stencil-translate stil offset

Return a stil, but translated by offset (a pair of numbers).

Function: ly:stencil-translate-axis stil amount axis

Return a copy of stil but translated by amount in axis direction.

Function: ly:stencil? x

Is x a Stencil object?

Function: ly:stream-event? x

Is x a Stream_event object?

Function: ly:string-substitute a b s

Replace string a by string b in string s.

Function: ly:system-font-load name

Load the OpenType system font ‘name.otf’. Fonts loaded with this command must contain three additional SFNT font tables called LILC, LILF, and LILY, needed for typesetting musical elements. Currently, only the Emmentaler and the Aybabtu fonts fulfill these requirements.

Note that only ly:font-get-glyph and derived code (like \lookup) can access glyphs from the system fonts; text strings are handled exclusively via the Pango interface.

Function: ly:system-print system

Draw the system and return the prob containing its stencil.

Function: ly:system-stretch system amount-scm

Stretch the system vertically by the given amount. This must be called before the system is drawn (for example with ly:system-print).

Function: ly:text-dimension font text

Given the font metric in font and the string text, compute the extents of that text in that font. The return value is a pair of number-pairs.

Function: ly:text-interface::interpret-markup

Convert a text markup into a stencil. Takes three arguments, layout, props, and markup.

layout is a \layout block; it may be obtained from a grob with ly:grob-layout. props is an alist chain, i.e. a list of alists. This is typically obtained with (ly:grob-alist-chain (ly:layout-lookup layout 'text-font-defaults)). markup is the markup text to be processed.

Function: ly:translator-description me

Return an alist of properties of translator me.

Function: ly:translator-group? x

Is x a Translator_group object?

Function: ly:translator-name trans

Return the type name of the translator object trans. The name is a symbol.

Function: ly:translator? x

Is x a Translator object?

Function: ly:transpose-key-alist l pit

Make a new key alist of l transposed by pitch pit.

Function: ly:truncate-list! lst i

Take at most the first i of list lst.

Function: ly:ttf->pfa ttf-file-name idx

Convert the contents of a TrueType font file to PostScript Type 42 font, returning it as a string. The optional idx argument is useful for TrueType collections (TTC) only; it specifies the font index within the TTC. The default value of idx is 0.

Function: ly:ttf-ps-name ttf-file-name idx

Extract the PostScript name from a TrueType font. The optional idx argument is useful for TrueType collections (TTC) only; it specifies the font index within the TTC. The default value of idx is 0.

Function: ly:unit

Return the unit used for lengths as a string.

Function: ly:usage

Print usage message.

Function: ly:version

Return the current lilypond version as a list, e.g., (1 3 127 uu1).

Function: ly:warning str rest

A Scheme callable function to issue the warning str. The message is formatted with format and rest.

Function: ly:wide-char->utf-8 wc

Encode the Unicode codepoint wc, an integer, as UTF-8.


Otros idiomas: English, deutsch.

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