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#!/usr/bin/env ruby
top = File.expand_path(File.join(File.dirname(__FILE__), ".."))
src = File.join(top, "src")
$LOAD_PATH.unshift src
$LOAD_PATH.unshift File.join(src, "lib")
require 'optparse'
require 'ostruct'
require 'cairo'
require 'pango'
def parse(args=ARGV)
options = OpenStruct.new
options.width = 595.275590551181.round
options.height = 841.889763779528.round
options.font_description = "Monospace 12"
options.fade_out = false
opts = OptionParser.new do |opts|
opts.on("--width=WIDTH", Integer, "paper width") {|options.width|}
opts.on("--height=HEIGHT", Integer, "paper height") {|options.height|}
opts.on("--font-description=DESCRIPTION",
"font description (e.g. 'Monospace 14')") do |desc|
options.font_description = desc
end
opts.on("--[no-]fade-out",
"fade-out one-third of page") {|options.fade_out|}
end
opts.parse!(args)
options
end
def render_background(cr)
cr.set_source_color(:white)
cr.paint
end
def make_layout(cr, text, width, font_description)
layout = cr.create_pango_layout
layout.text = text
layout.width = width * Pango::SCALE
layout.font_description = Pango::FontDescription.new(font_description)
cr.update_pango_layout(layout)
layout
end
def setup_fade_out(cr, width)
fade_out = Cairo::LinearPattern.new(0, 0, width, 0)
fade_out.add_color_stop(0, "#000f")
fade_out.add_color_stop(0.66, "#000f")
fade_out.add_color_stop(1, "#0000")
cr.set_source(fade_out)
end
def render_layout(cr, layout, margin_left, margin_top, body_height)
x = margin_left
y = margin_top
limit_y = margin_top + body_height
iter = layout.iter
prev_baseline = iter.baseline / Pango::SCALE
begin
line = iter.line
ink_rect, logical_rect = iter.line_extents
y_begin, y_end = iter.line_yrange
if limit_y < (y + y_end / Pango::SCALE)
cr.show_page
y = margin_top - prev_baseline
end
baseline = iter.baseline / Pango::SCALE
cr.move_to(x + logical_rect.x / Pango::SCALE, y + baseline)
cr.show_pango_layout_line(line)
prev_baseline = baseline
end while iter.next_line!
end
def render(options, output, surface_class)
text = options.text
width = options.width
height = options.height
font_description = options.font_description
fade_out = options.fade_out
margin_left = (width * 0.05).ceil
margin_right = (width * 0.05).ceil
margin_top = (height * 0.05).ceil
margin_bottom = (height * 0.05).ceil
body_width = width - margin_left - margin_right
body_height = height - margin_top - margin_bottom
surface_class.new(output, width, height) do |surface|
cr = Cairo::Context.new(surface)
render_background(cr)
layout = make_layout(cr, text, body_width, font_description)
if fade_out
setup_fade_out(cr, body_width)
else
cr.set_source_color(:black)
end
render_layout(cr, layout, margin_left, margin_top, body_height)
cr.show_page
end
end
def output(options, surface_class_name, suffix)
if Cairo.const_defined?(surface_class_name)
surface_class = Cairo.const_get(surface_class_name)
render(options, "text2.#{suffix}", surface_class)
else
puts("#{surface_class_name} isn't supported.")
end
end
options = parse
options.text = ARGF.read
output(options, "PSSurface", "ps")
output(options, "PDFSurface", "pdf")
output(options, "SVGSurface", "svg")
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