X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=scm%2Fpaper.scm;h=8c2b5dc71025a7e18fe5deef9dd5c866e8ff560a;hb=e3466d6cb187af548c5f7fc2b94c73390acbea52;hp=c5bdbbeba4b577fae647d11ab15850adfe31ddc6;hpb=beb54099cf241daac01cc026dad15211bf19c618;p=lilypond.git

diff --git a/scm/paper.scm b/scm/paper.scm
index c5bdbbeba4..8c2b5dc710 100644
--- a/scm/paper.scm
+++ b/scm/paper.scm
@@ -1,155 +1,184 @@
-;;; paper.scm -- scm paper variables and functions
-;;;
-;;;  source file of the GNU LilyPond music typesetter
-;;; 
-;;; (c) 1999--2000 Jan Nieuwenhuizen <janneke@gnu.org>
-
-;;; All dimensions are measured in staff-spaces
-
-
-; This is a mess : global namespace pollution. We should wait
-;  till guile has proper toplevel environment support.
-
-
-;; 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)))
-
-;; Note: quanting period is take as quants.top () - quants[0], 
-;; which should be 1 (== 1 interline)
-
-(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)))
-    (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)))
-    ;; period: 1 (interline)
-    (append quants (list (+ 1 (car quants))))))
-
-(define (beam-traditional-y-quants multiplicity dy)
-  (let ((quants '()))
-    (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)))
-    ;; period: 1 (interline)
-    (append quants (list (+ 1 (car 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))
-
-;; urg
-(define pi (* 2 (acos 0)))
-
-(define (slur-default-height h-inf r-0 b)
-  (let ((alpha (/ (* 2.0 h-inf) pi))
-	(beta (/ (* pi r-0) (* 2.0 h-inf))))
-    (* alpha (atan (* beta b)))))
- 
-;; see mf/feta-pendaal.mf
-(define pedal-kerning-alist '())
-(set! pedal-kerning-alist
-      (append 
-      '(
-	(("P" . "e") . -0.07)
-	(("e" . "d") . -0.53)
-	(("*" . "P") . 0.2)
-	)
-      pedal-kerning-alist))
-
-(define (pedal-kerning l r)
-  (let ((entry (assoc (cons l r) pedal-kerning-alist)))
-    (if entry
-	(cdr entry))))
-
+;;;; paper.scm -- manipulate the paper and layout block.
+;;;;
+;;;;  source file of the GNU LilyPond music typesetter
+;;;; 
+;;;; (c) 2004--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+(define-public (set-paper-dimension-variables mod)
+  (module-define! mod 'dimension-variables
+		  '(pt mm cm in staff-height staff-space
+		       page-top-space
+		       between-system-space between-system-padding
+		       line-width indent short-indent paper-width paper-height horizontal-shift
+		       staff-space line-thickness ledgerline-thickness
+		       blot-diameter left-margin right-margin)))
+
+(define (calc-line-thickness staff-space pt)
+  ;; linear interpolation.
+
+  ;; !! synchronize with feta-params.mf
+  (let*
+    ((x1 (* 4.125 pt))
+     (x0 (* 5 pt))
+     (f1 (* 0.47 pt))
+     (f0 (* 0.50 pt)))
+
+    (/
+     (+
+      (* f1 (- staff-space x0))
+	   (* f0 (- x1 staff-space)))
+     (- x1 x0))))
+
+(define-public (layout-set-absolute-staff-size-in-module module staff-height)
+  (let*
+      ((pt (eval 'pt module))
+       (ss (/ staff-height 4))
+       (factor (/ staff-height (* 20 pt)))
+       (setm! (lambda (sym val)
+		(module-define! module sym val))))
+
+    (setm! 'text-font-size (* 12 factor))
+    
+    (setm! 'output-scale ss)
+    (setm! 'fonts
+		    (if tex-backend?
+			(make-cmr-tree factor)
+			(make-century-schoolbook-tree factor)))
+    (setm! 'staff-height staff-height)
+    (setm! 'staff-space ss)
+
+    (setm! 'line-thickness (calc-line-thickness ss pt))
+
+    ;;  sync with feta  
+    (setm! 'ledgerline-thickness (+ (* 0.5 pt) (/ ss 10)))
+
+    ;;  sync with feta  
+    (setm! 'blot-diameter (* 0.4 pt))
+    ))
+
+(define-public (layout-set-absolute-staff-size sz)
+  "Function to be called inside a \\layout{} block to set the staff
+size. SZ is in points"
+  (layout-set-absolute-staff-size-in-module (current-module) sz))
+
+(define-public (layout-set-staff-size sz)
+  "Function to be called inside a \\layout{} block to set the staff
+size. SZ is in points"
+
+  (layout-set-absolute-staff-size (* (eval 'pt (current-module)) sz)))
+
+(define-safe-public (set-global-staff-size sz)
+  "Set the default staff size, where SZ is thought to be in PT."
+  (let* ((current-mod (current-module))
+	 (pap (eval '$defaultpaper current-mod))
+	 (in-layout? (or (module-defined? current-mod 'is-paper)
+			 (module-defined? current-mod 'is-layout)))
+
+	 ; maybe not necessary.
+	 ; but let's be paranoid. Maybe someone still refers to the
+	 ; old one. 
+	 (new-paper (ly:output-def-clone pap))
+	 
+	 (new-scope (ly:output-def-scope new-paper)))
+    
+    (if in-layout?
+	(ly:warning (_ "set-global-staff-size: not in toplevel scope")))
+
+    (layout-set-absolute-staff-size-in-module new-scope
+					      (* sz (eval 'pt new-scope)))
+    (module-define! current-mod '$defaultpaper new-paper)))
+
+(define-public paper-alist
+
+  ;; don't use decimals.
+  ;; ISO 216 has a tolerance of +- 2mm
+  
+  '(("a7" . (cons (* 74 mm) (* 105 mm)))
+    ("a6" . (cons (* 105 mm) (* 148 mm)))
+    ("a5" . (cons (* 148 mm) (* 210 mm)))
+    ("a4" . (cons (* 210 mm) (* 297 mm)))
+    ("a3" . (cons (* 297 mm) (* 420 mm)))
+    ("legal" . (cons (* 8.5 in) (* 14.0 in)))
+    ("letter" . (cons (* 8.5 in) (* 11.0 in)))
+    ("11x17" . (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 'paper-width w)
+    (module-define! m 'paper-height h)
+    (module-define! m 'line-width (- w
+				     (ly:modules-lookup (list m) 'left-margin (* 10 mm))
+				     (ly:modules-lookup (list m) 'right-margin (* 10 mm))))
+
+    (module-define! m 'indent (/ w 14))
+    (module-define! m 'short-indent (* 5 mm))
+
+    ;; page layout - what to do with (printer specific!) margin settings?
+
+    ))
+
+(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)
+      (module-define! module 'landscape 
+		      (if landscape? #t #f)))
+     (else
+      (ly:warning (_ "Unknown papersize: ~a" name))))))
+
+(define-safe-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:warning (_ "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 paper-width, paper-height. 
+	     ;; (ly:warning (_ "not a number, ~S = ~S " v  val))
+	     )))
+     
+     dim-vars)
+    
+    new-pap))