Create a gist now

Instantly share code, notes, and snippets.

@tdtds /MOVED
Created Dec 21, 2010

Embed
This project was moved to https://github.com/tdtds/kindlizer
#
# Rakefile for self publishing ebook of Kindle3 made by scanning paper book.
#
# modify parameters by your environment:
# SRC (must): source PDF file name.
# TOP, BOTTOM, LEFT, RIGHT: default margins (pixel) of trimming.
# SIZE: adjust image size by destination format.
# LEVEL (optional): level option of ImageMagic.
#
# for Debian or Ubuntu user, needs packages below:
# poppler-utils poppler-data imagemagick pdftk sam2p
#
SRC = 'sample.pdf'
TOP = 250
BOTTOM = 100
LEFT = 50
RIGHT = 50
# SIZE = '560x735' # for small books reading portrait style
SIZE = '720' # for large books reading landscape style
# SIZE = 'x693' # for generating mobi, portrait style only
LEVEL = '0%,100%'
#---------------------------------------------------------
PGM_DIR = './pgm'; directory PGM_DIR
PNG_DIR = './png'; directory PNG_DIR
PDF_DIR = './pdf'; directory PDF_DIR
DST = SRC.sub( /\.pdf$/, '.out.pdf' )
MOBI = SRC.sub( /\.pdf$/, '.mobi' )
OPF = SRC.sub( /\.pdf$/, '.opf' )
HTML = SRC.sub( /\.pdf$/, '.html' )
def count_pages
open( "|pdfinfo #{SRC}", 'r:utf-8', &:read ).scan( /^Pages:\s*(\d+)/ ).flatten[0].to_i
end
def book_title
open( "|pdfinfo #{SRC}", 'r:utf-8', &:read ).scan( /^Title:\s*(.+)$/ ).flatten[0]
end
def book_author
open( "|pdfinfo #{SRC}", 'r:utf-8', &:read ).scan( /^Author:\s*(.+)$/ ).flatten[0]
end
def image_list( dir, ext, count )
[].tap do |l|
1.upto( count ) do |i|
l << "#{dir}/tmp-#{'%03d' % i}.#{ext}"
end
end
end
def pgm2png( pgm, png )
sh "convert #{pgm} -level '#{LEVEL}' \
-chop #{LEFT}x#{TOP} \
-gravity SouthEast -chop #{RIGHT}x#{BOTTOM}\
-gravity NorthWest -fuzz 50% -trim -resize #{SIZE}\
#{/x/ =~ SIZE ? '' : '-gravity SouthWest -splice 1x15 -gravity NorthEast -splice 1x15'}\
#{png}"
end
def png2pdf( png, pdf )
sh "sam2p -j:quiet #{png} #{pdf}"
end
pages = count_pages
PGMS = image_list( PGM_DIR, 'pgm', pages )
PNGS = image_list( PNG_DIR, 'png', pages )
PDFS = image_list( PDF_DIR, 'pdf', pages )
PNGS.each_with_index do |png, i|
file PDFS[i] => [PDF_DIR, PNGS[i]] do |t|
png2pdf( t.prerequisites[1], t.name )
end
file PNGS[i] => [PNG_DIR, PGMS[i]] do |t|
pgm2png( t.prerequisites[1], t.name )
end
file PGMS[i] => [PGM_DIR, SRC] do
unless File::exist?( PGMS[-1] ) then
sh "pdftoppm -r 300 -gray #{SRC} #{PGM_DIR}/tmp"
end
end
end
task :default => :pdf
desc 'generate pdf file by concat all png files.'
task :pdf => DST
file DST => [PDF_DIR, 'metadata.txt'] + PDFS do
sh "pdftk #{PDFS.join ' '} cat output #{PDF_DIR}/#{DST}"
sh "pdftk #{PDF_DIR}/#{DST} update_info metadata.txt output #{DST}"
end
desc 'generate metadata file from source pdf.'
task :metadata => 'metadata.txt'
file 'metadata.txt' => SRC do |t|
sh "pdftk #{t.prerequisites.join ' '} dump_data output ./#{t.name}"
end
desc 'crop pgm files to png files.'
task :png => [PNG_DIR] + PNGS
rule '.png' => '.pgm' do |t|
pgm2png( t.prerequisites[0], t.name )
end
desc 'extract image files from source pdf.'
task :pgm => [PGM_DIR, SRC] + PGMS
desc 'cleanap pgm images.'
task 'clean-pgm' do
begin
rm PGMS
rescue
end
end
desc 'cleanap png images.'
task 'clean-png' do
begin
rm PNGS
rescue
end
end
desc 'cleanap temporaly pdf files.'
task 'clean-pdf' do
rm FileList["#{PDF_DIR}/*.pdf"]
end
desc 'cleanap all tmp files.'
task :clean => ['clean-png', 'clean-pgm', 'clean-pdf'] do
rm 'metadata.txt'
rm [HTML, OPF]
rmdir PGM_DIR
rmdir PNG_DIR
rmdir PDF_DIR
end
desc 'generate MOBI file.'
task :mobi => [OPF, HTML] + PNGS do |t|
sh "kindlegen #{OPF} -unicode -o #{MOBI}"
end
rule '.opf' => '.pdf' do |t|
opf = <<-OPF.gsub( /^\t/, '' )
<?xml version="1.0" encoding="utf-8"?>
<package unique-identifier="uid">
<metadata>
<dc-metadata xmlns:dc="http://purl.org/metadata/dublin_core"
xmlns:oebpackage="http://openebook.org/namespaces/oeb-package/1.0/">
<dc:Title>#{book_title}</dc:Title>
<dc:Language>en-US</dc:Language>
<dc:Creator>#{book_author}</dc:Creator>
<dc:Date>#{Time::now.strftime '%m/%d/%Y'}</dc:Date>
</dc-metadata>
<x-metadata>
<output encoding="utf-8" content-type="text/x-oeb1-document"></output>
<EmbeddedCover>#{PNGS[0]}</EmbeddedCover>
</x-metadata>
</metadata>
<manifest>
<item id="contents" media-type="text/html" href="#{HTML}"></item>
</manifest>
<spine>
<itemref idref="contents" />
</spine>
<tours></tours>
<guide>
<reference type="start" title="contents" href="#{HTML}"></reference>
</guide>
</package>
OPF
open( t.name, 'w:utf-8' ){|f| f.write opf}
end
rule '.html' => '.pdf' do |t|
html = <<-HTML.gsub( /^\t/, '' )
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="ja-JP">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>#{book_title}</title>
</head>
<body style="text-align: right;">
#{PNGS.map{|j| %Q|<img style="height: 100%;" src="#{j}" />|}.join "<mbp:pagebreak />\n\t\t"}
</body>
</html>
HTML
open( t.name, 'w:utf-8' ){|f| f.write html}
end
@tdtds

This comment has been minimized.

Show comment
Hide comment
Owner

tdtds commented Nov 1, 2011

This project was moved to https://github.com/tdtds/kindlizer .

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment