X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=scm%2Fpaper.scm;h=a73549291e5e611be7de9e52692c4fccc2b6a794;hb=5398c1592834132478e75ec17c2806e36b7a98fb;hp=eed1093b7f075a3acf97577fa50a35b91784e44e;hpb=f6e3a77381e8eb67aa01195ec3945bd978f86aa8;p=lilypond.git

diff --git a/scm/paper.scm b/scm/paper.scm
index eed1093b7f..a73549291e 100644
--- a/scm/paper.scm
+++ b/scm/paper.scm
@@ -1,122 +1,159 @@
-;;; paper.scm -- scm paper variables and functions
-;;;
-;;;  source file of the GNU LilyPond music typesetter
-;;; 
-;;; (c) 1999 Jan Nieuwenhuizen <janneke@gnu.org>
-
-;;; All dimensions are measured in staff-spaces
-
-
-
-;; Beams should be prevented to conflict with the stafflines, 
-;; especially at small slopes
-;;    ----------------------------------------------------------
-;;                                                   ########
-;;                                        ########
-;;                             ########
-;;    --------------########------------------------------------
-;;       ########
-;;
-;;       hang       straddle   sit        inter      hang
-
-;; inter seems to be a modern quirk, we don't use that
-
-(define staff-line 0.10)
-(define beam-thickness (* 0.52 (- 1 staff-line)))
-(define beam-straddle 0)
-(define beam-sit (/ (+ beam-thickness staff-line) 2))
-(define beam-hang (- 1 (/ (- beam-thickness staff-line) 2)))
-
-(define beam-normal-dy-quants
-  (list 0 (/ (+ beam-thickness staff-line) 2) (+ beam-thickness staff-line) 1))
-
-;; two popular veritcal beam quantings
-;; see params.ly: #'beam-vertical-quants
-(define (beam-normal-y-quants multiplicity dy)
-  (let ((quants (list beam-hang 1)))
-    (if (or (<= multiplicity 1) (>= (abs dy) (/ staff-line 2)))
-	(set! quants (cons beam-sit quants)))
-    (if (or (<= multiplicity 2) (>= (abs dy) (/ staff-line 2)))
-	(set! quants (cons beam-straddle quants)))
-    quants))
-
-(define (beam-traditional-y-quants multiplicity dy)
-  (let ((quants '(1)))
-    (if (>= dy (/ staff-line -2))
-	(set! quants (cons beam-hang quants)))
-    (if (and (<= multiplicity 1) (<= dy (/ staff-line 2)))
-	(set! quants (cons beam-sit quants)))
-    (if (or (<= multiplicity 2) (>= (abs dy) (/ staff-line 2)))
-	(set! quants (cons beam-straddle quants)))
-    quants))
-
-
-;; There are several ways to calculate the direction of a beam
-;;
-;; * majority: number count of up or down notes
-;; * mean    : mean centre distance of all notes
-;; * median  : mean centre distance weighted per note
-
-(define (dir-compare up down)
-  (if (= up down)
-      0
-      (if (> up down)
-	  1
-	  -1)))
-
-;; (up . down)
-(define (beam-dir-majority count total)
-  (dir-compare (car count) (cdr count)))
-
-(define (beam-dir-mean count total)
-  (dir-compare (car total) (cdr total)))
-
-(define (beam-dir-median count total)
-  (if (and (> (car count) 0)
-	   (> (cdr count) 0))
-      (dir-compare (/ (car total) (car count)) (/ (cdr total) (cdr count)))
-      (dir-compare (car count) (cdr count))))
-	    
-
-;;; Default variables and settings
-
-(define beam-height-quants beam-normal-dy-quants)
-(define beam-vertical-position-quants beam-normal-y-quants)
-
-
-;; [Ross] states that the majority of the notes dictates the
-;; direction (and not the mean of "center distance")
-;;
-;; But is that because it really looks better, or because he wants
-;; to provide some real simple hands-on rules?
-;;     
-;; We have our doubts, so we simply provide all sensible alternatives.
-(define beam-dir-algorithm beam-dir-majority)
-
-
-;; array index flag-2 (what a name!!), last if index>size
-;; unbeamed stems
-(define stem-length '(3.5 3.5 3.5 4.5 5.0))
-(define grace-length-factor 0.8)
-(define grace-stem-length
-  (map (lambda (x) (* grace-length-factor x)) stem-length))
-
-;; array index multiplicity, last if index>size
-;; beamed stems
-(define beamed-stem-shorten '(0.5))
-(define beamed-stem-length '(0.0 2.5 2.0 1.5))
-(define grace-beamed-stem-length '(0.0 2.5 2.0 1.5))
-(define beamed-stem-minimum-length '(0.0 1.5 1.25 1.0))
-(define grace-beamed-stem-minimum-length
-  (map (lambda (x) (* grace-length-factor x)) beamed-stem-minimum-length))
-
-;;  Stems in unnatural (forced) direction should be shortened,
-;;  according to [Roush & Gourlay].  Their suggestion to knock off
-;;  a whole staffspace seems a bit drastical: we'll do half.
-
-;; TODO
-;;  - take #forced stems into account (now done in C++)?
-;;  - take y-position of chord or beam into account
-
-(define stem-shorten '(0.5))
-(define grace-stem-shorten '(0.0))
+;;;; paper.scm -- manipulate the paper and layout block.
+;;;;
+;;;;  source file of the GNU LilyPond music typesetter
+;;;; 
+;;;; (c)  2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+
+(define-public (set-paper-dimension-variables mod)
+  (module-define! mod 'dimension-variables
+		  '(pt mm cm in staffheight staff-space
+		       betweensystemspace betweensystempadding
+		       linewidth indent hsize vsize
+		       staffspace linethickness ledgerlinethickness
+		       blotdiameter interscoreline leftmargin rightmargin)))
+
+(define-public (layout-set-staff-size sz)
+  "Function to be called inside a \\layout{} block to set the staff size."
+  (let* ((m (current-module))
+	 (ss (/ sz 4))
+	 (pt (eval 'pt m))
+
+	 
+	 ;; linear interpolation.
+	 (x1 (* 4.125 pt))
+	 (x0 (* 5 pt))
+	 (f1 (* 0.47 pt))
+	 (f0 (* 0.50 pt))
+	 (lt (/
+	      (+
+	       (* f1 (- ss x0))
+	       (* f0 (- x1 ss)))
+	      (- x1 x0)))
+	 
+	 (mm (eval 'mm m)))
+
+    (module-define! m 'outputscale ss)
+    (module-define! m 'fonts (make-cmr-tree (/  sz (* 20 pt))))
+    (module-define! m 'staffheight sz)
+    (module-define! m 'staff-space ss)
+    (module-define! m 'staffspace ss)
+
+    ;; !! synchronize with feta-params.mf
+    (module-define! m 'linethickness lt)
+    (module-define! m 'ledgerlinethickness (+ (* 0.5 pt) (/ ss 10)))
+    (module-define! m 'blotdiameter (* 0.35 pt))
+    (module-define! m 'interscoreline (* 4 mm))))
+
+(define-public (set-global-staff-size sz)
+  "Set the default staff size, where SZ is thought to be in PT."
+  (let* ((old-mod (current-module))
+	 (pap (eval '$defaultpaper old-mod))
+	 (in-layout? (or (module-defined? old-mod 'is-paper)
+			 (module-defined? old-mod 'is-layout)))
+
+	 ; maybe not necessary.
+	 ; but let's be paranoid. Maybe someone still refers to the
+	 ; old one. 
+	 (new-paper (ly:output-def-clone pap))
+	 
+	 (new-scope (ly:output-def-scope new-paper)))
+    
+    (if in-layout?
+	(ly:warn "Not in toplevel scope"))
+    (set-current-module new-scope)
+    (layout-set-staff-size (* sz (eval 'pt new-scope)))
+    (set-current-module old-mod)
+    (module-define! old-mod '$defaultpaper new-paper)))
+
+(define paper-alist
+  '(("a6" . (cons (* 105 mm) (* 148.95 mm)))
+    ("a5" . (cons (* 148.95 mm) (* 210 mm)))
+    ("a4" . (cons (* 210 mm) (* 297.9 mm)))
+    ("a3" . (cons (* 297.9 mm) (* 420 mm)))
+    ("legal" . (cons (* 8.5 in) (* 14.0 in)))
+    ("letter" . (cons (* 8.5 in) (* 11.0 in)))
+    ("tabloid" . (cons (* 11.0 in) (* 17.0 in)))))
+
+;; todo: take dimension arguments.
+
+(define (set-paper-dimensions m w h)
+  "M is a module (i.e. layout->scope_ )"
+  (let* ((mm (eval 'mm m)))
+    (module-define! m 'hsize w)
+    (module-define! m 'vsize h)
+    (module-define! m 'linewidth (- w (* 20 mm)))
+    (module-define! m 'indent (/ w 14))
+
+    ;; page layout - what to do with (printer specific!) margin settings?
+    (module-define! m 'topmargin (* 5 mm))
+    (module-define! m 'bottommargin (* 6 mm))
+    (module-define! m 'headsep (* 4 mm))
+    (module-define! m 'footsep (* 4 mm))
+    (module-define! m 'leftmargin #f)
+    (module-define! m 'firstpagenumber 1)
+    (module-define! m 'printfirstpagenumber #f)
+    (module-define! m 'rightmargin (* 10 mm))))
+
+(define (internal-set-paper-size module name landscape?)
+  (define (swap x)
+    (cons (cdr x) (car x)))
+  
+  (let* ((entry (assoc name paper-alist))
+	 (is-paper? (module-defined? module 'is-paper))
+	 (mm (eval 'mm module)))
+    
+    (cond
+     ((not is-paper?)
+      (ly:warning "This is not a \\layout {} object, ~S"
+		   module))
+     ((pair? entry)
+
+      (set! entry (eval (cdr entry) module))
+      (if landscape?
+	  (set! entry (swap entry)))
+      (set-paper-dimensions module (car entry) (cdr entry))
+
+      (module-define! module 'papersizename name)
+
+      (if landscape?
+	  (module-define! module 'landscape #t)))
+     (else
+      (ly:warn (string-append "Unknown papersize: " name))))))
+
+(define-public (set-default-paper-size name . rest)
+  (internal-set-paper-size
+   (ly:output-def-scope (eval '$defaultpaper (current-module)))
+   name
+   (memq 'landscape rest)))
+
+(define-public (set-paper-size name . rest)
+  (if (module-defined? (current-module) 'is-paper)
+      (internal-set-paper-size (current-module) name
+			       (memq 'landscape rest))
+
+      ;;; TODO: should raise (generic) exception with throw, and catch
+      ;;; that in parse-scm.cc
+      (ly:warn "Must use #(set-paper-size .. ) within \\paper { ... }")))
+
+(define-public (scale-layout pap scale)
+  (let* ((new-pap (ly:output-def-clone pap))
+	 (dim-vars (ly:output-def-lookup pap 'dimension-variables))
+	 (old-scope (ly:output-def-scope pap))
+	 (scope (ly:output-def-scope new-pap)))
+
+    (for-each
+     (lambda (v)
+       (let* ((var (module-variable old-scope v))
+	      (val (if (variable? var) (variable-ref var) #f)))
+
+	 (if (number? val)
+	     (module-define! scope v
+			     (/ val scale))
+
+	     ;; spurious warnings, eg. for hsize, vsize. 
+	     ;; (ly:warn "not a number, ~S = ~S " v  val)
+	     )))
+     
+     dim-vars)
+    
+    new-pap))