minicomic-backend/minicomic-backend.rb

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2009-04-01 01:00:19 +00:00
#!/usr/bin/ruby
require 'yaml'
require 'time'
require 'singleton'
class Filter
include Singleton
@config = {}
@cleanup = []
attr_accessor :config, :cleanup
def initialize
@config = {}
@cleanup = []
end
def cleanup
@cleanup.each do |f|
if File.exists? f; File.unlink(f); end
end
end
def recalc_pixels
if @config['print']
if @config['width_inches'] && @config['width_inches'] != 0
@config['width'] = @config['width_inches'].to_i * @config['dpi'].to_i
end
if @config['height_inches'] && @config['height_inches'] != 0
@config['height'] = @config['height_inches'].to_i * @config['dpi'].to_i
end
end
end
#
# Set the config
#
def config=(c)
@config = c
recalc_pixels
end
#
# Build a temporary PNG from an SVG file
#
def inkscape(input, target)
params = []
width = @config['width']
height = @config['height']
inkscape_target = target
if @config['rotate']
case @config['rotate']
when 90, -90
t = width; width = height; height = t
inkscape_target = target + "-pre.png"
end
end
if width; params << "-w #{width} "; end
if height; params << "-h #{height} "; end
system("inkscape -e \"#{inkscape_target}\" -y 1.0 #{params.join(" ")} \"#{input}\"")
if @config['rotate']
command = [
"\"#{inkscape_target}\"",
"-rotate #{@config['rotate']}",
"\"#{target}\""
]
convert(command)
File.unlink(inkscape_target)
end
end
def convert(command, verbose = false)
system("convert " + (verbose ? "-verbose " : "" ) + [ command ].flatten.join(" "))
end
#
# Get the dimensions of a file
#
def get_dimensions(input)
dimensions = nil
IO.popen("identify -format '%w,%h' \"#{input}\"") do |fh|
dimensions = fh.readlines.first.split(",").collect { |d| d.to_i }
end
dimensions
end
end
class InputFilter < Filter
OutputFilename = "tmp.png"
end
class OutputFilter < Filter
#
# get the output filename for this filter
#
def filename(info)
target = @config['target']
info.each { |k,v| target = target.gsub("{#{k}}", v.to_s) }
target
end
#
# get the output targets for this filter
#
def targets(info); filename(info); end
end
module PrintHandling
#
# calculate the page size in PPI
#
def calculate_page_size
if @config['dpi']
if @config['page_size']
case @config['page_size'].downcase
when "letter", "letter_portrait"
page_width = 8.5; page_height = 11
when "letter_landscape"
page_width = 11; page_height = 8.5
when "half_letter_landscape"
page_width = 5.5; page_height = 8.5
end
else
page_width = @config['page_width_inches']
page_height = @config['page_height_inches']
end
page_width *= @config['dpi']
page_height *= @config['dpi']
else
page_width = @config['page_width']
page_height = @config['page_height']
end
[ page_width, page_height ]
end
#
# align the provided image on a white page
#
def build_for_print(input, output, side = "none")
page_width, page_height = calculate_page_size
command = [
"-density #{config['dpi']}",
"-size #{page_width.to_i}x#{page_height.to_i}",
"xc:white"
]
case side
when "none"
command << "-gravity Center"
when "left"
command << "-gravity East"
when "right"
command << "-gravity West"
end
command << "-draw 'image Over 0,0 0,0 \"#{input}\"'"
command << "\"#{output}\""
convert(command)
end
end
class SVGToTempBitmap < InputFilter
include PrintHandling
#
# select which build method to use based on the number of provided images.
#
def build(input)
(input.instance_of? Array) ? multiple(input) : single(input)
end
#
# process a single input file, possibly splitting it into two output files if it's a spread
#
def single(input)
filename = Dir.pwd + '/' + OutputFilename
inkscape(input, filename)
@cleanup << filename
if @config['spread']
width, height = get_dimensions(filename)
targets = []
[ [ "left", 0 ], [ "right", width / 2 ] ].each do |side, offset|
target = filename + "-#{side}.png"
command = [
"\"#{filename}\"",
"-gravity Northwest",
"-crop #{width/2}x#{height}+#{offset}+0",
"+repage",
"\"#{target}\""
]
convert(command)
targets << target
@cleanup << target
end
return targets
end
return filename
end
#
# combine multiple input files onto a single page-sized canvas.
# images are added left-to-right and top-to-bottom starting from the top-left of the page.
# leave a grid square blank by passing the filename "/blank".
#
def multiple(files)
if @config['spread']; raise "Spreads and grids combined do not make sense"; end
width, height = @config['grid'].split("x").collect { |f| f.to_f }
joined_files = []
page_width, page_height = calculate_page_size
grid_width = page_width / width
grid_height = page_height / height
0.upto(files.length - 1) do |i|
x = i % width
y = (i / width).floor
if files[i].split('/').last != "blank"
tmp_svg_output = OutputFilename + "-#{i}.png"
inkscape(Dir.pwd + '/' + files[i], tmp_svg_output)
joined_files << [ tmp_svg_output, x, y ]
@cleanup << tmp_svg_output
end
end
command = [
"-size #{page_width}x#{page_height}",
"xc:white"
]
joined_files.each do |file, x, y|
image_width, image_height = get_dimensions(file)
x_offset = (grid_width - image_width) / 2
y_offset = (grid_height - image_height) / 2
command << "-draw 'image Over #{x * grid_width + x_offset},#{y * grid_height + y_offset} 0,0 \"#{file}\"'"
end
command << OutputFilename
convert(command)
@cleanup << OutputFilename
OutputFilename
end
end
#
# Process an input file for the Web
#
class TempBitmapToWeb < OutputFilter
def build(input, output)
quality = @config['quality'] ? @config['quality'] : 80
convert("\"#{input}\" -quality #{quality} \"#{output}\"")
end
def filename(info)
if !@config['start_date']; raise "Must define a start date!"; end
if !@config['period']; raise "Must define a period!"; end
index = info['index'].to_i
if index == 0 && @config['announce_date']
comic_date = @config['announce_date']
else
day_of_week = 0
weeks_from_start = 0
case @config['period']
when "daily"
day_of_week = index % 5
weeks_from_start = (index / 5).floor
when "weekly"
weeks_from_start = index
end
if @config['delay_at_index'] && @config['delay_length_weeks']
if index >= @config['delay_at_index']
weeks_from_start += @config['delay_length_weeks']
end
end
comic_date = Time.parse(@config['start_date']) + ((((day_of_week + weeks_from_start * 7) * 24) + 6) * 60 * 60)
end
info['date'] = comic_date.strftime("%Y-%m-%d")
super(info)
end
end
#
# Code to help with pagination
#
module Pagination
def paginate(files)
if !files.instance_of? Array; raise "File list must be an array"; end
if files.length == 0; raise "File list cannot be empty"; end
if (files.length % 4) != 0; raise "File list must be divisible by 4"; end
number_of_sheet_faces = (files.length / 4) * 2
sheet_faces = []
is_right = 1
is_descending = 1
sheet_face_index = 0
files.each do |file|
if !sheet_faces[sheet_face_index]; sheet_faces[sheet_face_index] = []; end
sheet_faces[sheet_face_index][is_right] = file
is_right = 1 - is_right
sheet_face_index += is_descending
if sheet_face_index == number_of_sheet_faces
sheet_face_index -= 1
is_descending = -1
end
end
tmp_pdf_files = []
0.upto(sheet_faces.length - 1) do |i|
f = @config['target'] + "-#{i}.pdf"
process_pagination(f, i, sheet_faces.length, *sheet_faces[i])
tmp_pdf_files << f
end
system("pdfjoin #{tmp_pdf_files.collect { |f| "\"#{f}\"" }.join(" ")} --outfile \"#{@config['target']}\"")
end
end
#
# Convert a bitmap to a single page print for proofing
#
class TempBitmapToPrint < OutputFilter
include PrintHandling
def build(input, output)
build_for_print(input, "tmp2.pbm")
system("sam2p -c:lzw -m:dpi:#{(72.0 * (72.0 / @config['dpi'].to_f))} tmp2.pbm PDF:\"#{output}\"");
system("rm tmp2.pbm")
end
end
#
# Convert bitmap files to a paginated print-ready file
#
class TempBitmapToPaginatedPrint < OutputFilter
include PrintHandling, Pagination
def build(input, output, side = "none")
build_for_print(input, output, side)
end
def targets(info)
(@config['spread'] == true) ? [ filename(info) + "-left.png", "tmp-right.png" ] : filename(info)
end
def process_pagination(output, face, total_faces, left, right)
page_width, page_height = calculate_page_size
commands = [
"-size #{page_width * 2}x#{page_height}",
"xc:white",
"-gravity Northwest"
]
left_creep = 0
right_creep = 0
if @config['page_thickness']
max_creep = (total_faces / 2)
left_creep = ((max_creep - (face - max_creep).abs) * @config['page_thickness'].to_f * @config['dpi'].to_i).floor
right_creep = ((max_creep - (total_faces - face - max_creep).abs) * @config['page_thickness'].to_f * @config['dpi'].to_i).floor
end
if left
commands << "-draw 'image Over -#{left_creep.to_i},0 0,0 \"#{left}\"'"
end
if right
commands << "-draw 'image Over #{(page_width + right_creep).to_i},0 0,0 \"#{right}\"'"
end
commands << "-channel RGB -depth 8 tmp2.png"
convert(commands)
system("sam2p -c:lzw -m:dpi:#{(72.0 * (72.0 / @config['dpi'].to_f))} tmp2.png PDF:\"#{output}\"");
system("rm tmp2.png")
end
end
any_rebuilt = false
any_rsync = false
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if !ARGV[0]
puts "Usage: #{File.basename(__FILE__)} <path to YAML file>"
exit 0
end
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if !File.exists?(ARGV[0])
puts "#{ARGV[0]} doesn't exist!"
exit 1
end
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config = YAML::load(File.open(ARGV[0], "r"))
global = config['Global']
if !global['path']; exit 1; end
page_index_format = global['page_index_format'] ? global['page_index_format'] : "%0#{Math.log10(Dir[global['path']].length).ceil}d"
page_index = 1
fileinfo_by_file = {}
if global['pages']
re = nil
files = global['pages'].collect do |f|
result = nil
case f.class.to_s
when 'String'
result = global['path'] + f
if f == "blank"
fileinfo_by_file[result] = { 'file' => f }
end
when 'Hash'
if f['file']
case f['file'].class.to_s
when 'String'
result = global['path'] + f['file']
fileinfo_by_file[result] = f
when 'Array'
result = f['file'].collect { |sub_f| global['path'] + sub_f }
fileinfo_by_file[result.join(",")] = f
end
else
result = f
end
end
result
end
else
re = Regexp.new(global['match'])
files = Dir[global['path']].sort.collect do |filename|
if matches = re.match(filename)
filename
end
end
end
paginated_source_files = {}
rsync_files_by_target = {}
files.each do |filename|
ok = true; matches = nil; fileinfo = {}
if filename.instance_of? Hash
if filename['blank']
ok = false
config.each do |type, info|
if info['is_paginated']
if !paginated_source_files[type]; paginated_source_files[type] = []; end
paginated_source_files[type] << nil
end
end
page_index += 1
else
fileinfo = filename
filename = fileinfo['file']
end
else
if re; ok = matches = re.match(filename); end
end
if ok
filename_display = (filename.instance_of? Array) ? filename.join(", ") : filename
puts "Examining #{filename_display}..."
filename_parts = {
'page_index' => sprintf(page_index_format, page_index)
}
if matches
all, index, title = matches.to_a
else
index = page_index - 1
title = ""
end
if global['title']; title = global['title'].gsub("{index}", index).gsub("{title}", title); end
filename_parts['index'] = index
filename_parts['title'] = title
config.each do |type, info|
if type != "Global"
input = nil; output = nil
fileinfo_key = (filename.instance_of? Array) ? filename.join(",") : filename
file_fileinfo = (fileinfo_by_file[fileinfo_key]) ? fileinfo_by_file[fileinfo_key] : {}
extension = File.extname((filename.instance_of? Array) ? filename[0] : filename).downcase
case extension
when ".svg"
case File.extname(config[type]['target']).downcase
when ".jpg", ".jpeg", ".png", ".gif"
input = SVGToTempBitmap
output = TempBitmapToWeb
when ".pdf"
input = SVGToTempBitmap
output = (info['is_paginated']) ? TempBitmapToPaginatedPrint : TempBitmapToPrint
end
end
if !input; raise "No input handler for #{extension} defined"; end
if !output; raise "No output handler for #{File.extname(config[type]['target']).downcase} defined"; end
input_obj = input.instance
input_obj.config = info.dup.merge(fileinfo).merge(file_fileinfo)
output_obj = output.instance
output_obj.config = info.dup.merge(fileinfo).merge(file_fileinfo)
if info['is_paginated']
output_obj.config['target'] += "-{page_index}.png"
end
targets = output_obj.targets(filename_parts)
rebuild = false
[ targets ].flatten.each do |t|
if !File.exists?(t)
rebuild = true
else
[ filename ].flatten.each do |f|
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if File.basename(f) != "blank"
if File.mtime(f) > File.mtime(t)
rebuild = true
end
end
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end
end
end
if rebuild
any_rebuilt = true
puts "Rebuilding #{filename_display} (#{type})..."
tmp_files = input_obj.build(filename)
output_files = []
case tmp_files.class.to_s
when "String"
output_obj.build(tmp_files, targets)
output_files << targets
when "Array"
[0,1].each do |i|
output_obj.build(tmp_files[i], targets[i], (i == 0) ? "left" : "right")
output_files << targets[i]
end
end
input_obj.cleanup
end
if info['is_paginated']
if !paginated_source_files[type]; paginated_source_files[type] = []; end
paginated_source_files[type] << targets
end
if info['rsync']
if !rsync_files_by_target[info['rsync']]; rsync_files_by_target[info['rsync']] = []; end
rsync_files_by_target[info['rsync']] << targets
end
end
end
page_index += 1
end
end
config.each do |type, info|
if info['is_paginated']
output = TempBitmapToPaginatedPrint
output_obj = output.instance
output_obj.config = info.dup
output_obj.paginate(paginated_source_files[type].flatten)
end
if info['rsync']
system("echo '#{rsync_files_by_target[info['rsync']].join("\n")}' | rsync -vru --files-from=- . #{info['rsync']}")
end
end
if global['use_git']
system("git add .")
system("git commit -a")
end