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;;; "mkclrnam.scm" create color name databases
;Copyright 2001, 2002, 2003 Aubrey Jaffer
;
;Permission to copy this software, to modify it, to redistribute it,
;to distribute modified versions, and to use it for any purpose is
;granted, subject to the following restrictions and understandings.
;
;1. Any copy made of this software must include this copyright notice
;in full.
;
;2. I have made no warranty or representation that the operation of
;this software will be error-free, and I am under no obligation to
;provide any services, by way of maintenance, update, or otherwise.
;
;3. In conjunction with products arising from the use of this
;material, there shall be no use of my name in any advertising,
;promotional, or sales literature without prior written consent in
;each case.
(require 'string-search)
(require 'line-i/o)
(require 'scanf)
(require 'color)
(require 'color-names)
(require 'databases)
(require-if 'compiling 'filename)
;;@subsubheading Dictionary Creation
;;
;;@code{(require 'color-database)}
;;@ftindex color-database
;;@args file table-name rdb base-table-type
;;@args file table-name rdb
;;
;;@3 must be an open relational database or a string naming a relational
;;database file, @2 a symbol, and the string @1 must name an existing
;;file with colornames and their corresponding xRGB (6-digit hex)
;;values. @0 creates a table @2 in @3 and enters the associations found
;;in @1 into it.
(define (file->color-dictionary file table-name . *db*)
(define rdb (apply open-database! *db*))
(define-tables rdb
`(,table-name
((name string))
((color string)
(order ordinal))
()))
(let ((table ((rdb 'open-table) table-name #t)))
(and table (load-rgb-txt file table))))
;;@args url table-name rdb base-table-type
;;@args url table-name rdb
;;
;;@3 must be an open relational database or a string naming a relational
;;database file and @2 a symbol. @0 retrieves the resource named by the
;;string @1 using the @dfn{wget} program; then calls
;;@code{file->color-dictionary} to enter its associations in @2 in @1.
(define (url->color-dictionary url table-name . rdb)
(require 'filename)
(call-with-tmpnam
(lambda (file)
(system (string-append "wget -c -O" file " -USLIB" *SLIB-VERSION* " " url))
(apply file->color-dictionary file table-name rdb))))
(define (load-rgb-txt path color-table)
(cond ((not (file-exists? path))
(slib:error 'load-color-dictionary! 'file-exists? path)))
(write 'load-rgb-txt) (display #\ ) (write path) (newline)
(let ((color-table:row-insert (color-table 'row:insert))
(color-table:row-retrieve (color-table 'row:retrieve))
(method-id #f))
(define (floats->rgb . rgbi)
(apply color:sRGB
(map (lambda (x) (inexact->exact (round (* 255 x)))) rgbi)))
(define (parse-rgb-line line)
(let ((rgbx #f) (r #f) (g #f) (b #f)
(ri #f) (gi #f) (bi #f) (name #f) (junk #f) (ans #f))
(define (check-match line color1 . colors)
(cond ((null? colors) (color->string color1))
((> (CMC:DE* color1 (car colors)) 5.0)
(newline) (display line) (force-output)
(slib:warn (round (CMC:DE* color1 (car colors)))
'mismatch (color->string color1)
(color->string (car colors)))
(apply check-match line colors))
(else (apply check-match line colors))))
(for-each
(lambda (method)
(or ans
(let ((try (method line)))
(cond (try (set! ans try)
(display "**** Using method ")
(display method-id) (newline)
(set! parse-rgb-line method))))))
(list
(lambda (line)
(define en #f) (define fr #f) (define de #f)
(define es #f) (define cz #f) (define hu #f)
(case (sscanf line "#%6x %[^ ] %[^ ] %[^ ] %[^ ] %[^ ] %[^ ]%s"
rgbx en fr de es cz hu junk)
((7)
(set! method-id 'm77)
(cons (check-match line (xRGB->color rgbx))
(map color-name:canonicalize (list en fr de es cz hu))))
(else #f)))
(lambda (line)
(case (sscanf line " %24[a-zA-Z0-9_ ] %d %d %d %e %e %e %s"
name r g b ri gi bi junk)
((7)
(set! method-id 'm7)
(list (check-match line (color:sRGB r g b) (floats->rgb ri gi bi))
(color-name:canonicalize name)))
(else #f)))
(lambda (line)
(case (sscanf line " %[a-zA-Z0-9_] %6x %d %d %d %e %e %e %s"
name rgbx r g b ri gi bi junk)
((8)
(set! method-id 'm8)
(list (check-match line (xrgb->color rgbx)
(color:sRGB r g b)
(floats->rgb ri gi bi))
(color-name:canonicalize name)))
(else #f)))
(lambda (line)
(case (sscanf line " %[a-zA-Z0-9] %6x %d,%d,%d" name rgbx r g b)
((5)
(set! method-id 'm5)
(list (check-match line (xrgb->color rgbx) (color:sRGB r g b))
(color-name:canonicalize name)))
(else #f)))
(lambda (line)
(case (sscanf line " %[- a-zA-Z0-9_'] #%6x %d %d %d %s"
name rgbx r g b junk)
((6 5)
(set! method-id 'm65)
(list (check-match line (xrgb->color rgbx) (color:sRGB r g b))
(color-name:canonicalize name)))
(else #f)))
(lambda (line)
(case (sscanf line " %d %d %d %[a-zA-Z0-9 ]%s" r g b name junk)
((4) (set! method-id 'm4a)
(list (check-match line (color:sRGB r g b))
(color-name:canonicalize name)))
(else #f)))
(lambda (line)
(case (sscanf line " %[- a-zA-Z.] %d %d %d %s"
name r g b junk)
((4) (set! method-id 'm4b)
(list (check-match line (color:sRGB r g b))
(color-name:canonicalize name)))
(else #f)))
(lambda (line)
(case (sscanf line "\" Resene %[^\"]\" %d %d %d %s"
name r g b junk)
((4) (set! method-id 'm4b)
(list (check-match line (color:sRGB r g b))
(color-name:canonicalize name)))
(else #f)))
(lambda (line)
(case (sscanf line "\" %[^\"]\" %d %d %d %s"
name r g b junk)
((4) (set! method-id 'm4c)
(list (check-match line (color:sRGB r g b))
(color-name:canonicalize name)))
(else #f)))
(lambda (line)
(case (sscanf line " %[a-zA-Z0-9_] #%x%6x%s" name rgbx junk)
((2) (set! method-id 'm2a)
(list (check-match line (xrgb->color rgbx))
(color-name:canonicalize name)))
(else #f)))
(lambda (line)
(case (sscanf line "%[- a-zA-Z']=#%6x<br>" name rgbx)
((2) (set! method-id 'm2b)
(let ((idx (substring? "rgb" name)))
(and (eqv? idx (+ -3 (string-length name)))
(list (check-match line (xrgb->color rgbx))
(color-name:canonicalize (substring name 0 idx))))))
(else #f)))
(lambda (line)
(case (sscanf line "\" %[^\"]\" %s" name junk)
((2) (set! method-id 'm2c)
(let ((clr (string->color junk)))
(and clr (list (check-match line clr)
(color-name:canonicalize name)))))
(else #f)))))
ans))
(define (numbered-gray? str)
(define idx #f)
(and (or (eqv? 0 (substring-ci? "gray" str))
(eqv? 0 (substring-ci? "grey" str)))
(eqv? 1 (sscanf (substring str 4 (string-length str))
"%d%s" idx str))))
(call-with-input-file path
(lambda (port)
(define *idx* 0)
(define *rcs-header* (read-line port))
(do ((line (read-line port) (read-line port)))
((eof-object? line)
(display "Inserted ") (display *idx*) (display "colors") (newline)
*rcs-header*)
(let ((colin (parse-rgb-line line)))
(cond ((equal? "" line))
;;((char=? #\# (string-ref line 0)))
((not colin) (write-line line))
((numbered-gray? (cadr colin)))
(else
(for-each
(lambda (name)
(let ((oclin (color-table:row-retrieve name)))
(cond
((and oclin (equal? (car colin) (cadr oclin))))
((not oclin)
(set! *idx* (+ 1 *idx*))
(color-table:row-insert
(list name (car colin) *idx*)))
(else (slib:warn 'collision name oclin)))))
(cdr colin))))))))))
;;@noindent
;;This section has detailed the procedures for creating and loading
;;color dictionaries. So where are the dictionaries to load?
;;
;;@uref{http://swissnet.ai.mit.edu/~jaffer/Color/Dictionaries.html}
;;
;;@noindent
;;Describes and evaluates several color-name dictionaries on the web.
;;The following procedure creates a database containing two of these
;;dictionaries.
;;@body
;;Creates an @r{alist-table} relational database in @r{library-vicinity}
;;containing the @dfn{Resene} and @dfn{saturate} color-name
;;dictionaries.
;;
;;If the files @file{resenecolours.txt} and @file{saturate.txt} exist in
;;the @r{library-vicinity}, then they used as the source of color-name
;;data. Otherwise, @0 calls url->color-dictionary with the URLs of
;;appropriate source files.
(define (make-slib-color-name-db)
(define cndb (create-database (in-vicinity (library-vicinity) "clrnamdb.scm")
'alist-table))
(for-each
(lambda (lst)
(apply
(lambda (url path name)
(define filename (in-vicinity (library-vicinity) path))
(if (file-exists? filename)
(file->color-dictionary filename name cndb)
(url->color-dictionary url name cndb)))
lst))
'(("http://swissnet.ai.mit.edu/~jaffer/Color/saturate.txt"
"saturate.txt"
saturate)
("http://swissnet.ai.mit.edu/~jaffer/Color/resenecolours.txt"
"resenecolours.txt"
resene)))
(close-database cndb))
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