Class: CTioga2::PostProcess

Inherits:
Object
  • Object
show all
Includes:
Log
Defined in:
lib/ctioga2/postprocess.rb

Overview

What happens to generated PDF files ?

todo

  • handle movie generation ? That would be fun !

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Log

debug, error, fatal, #format_exception, #identify, info, init_logger, logger, set_level, #spawn, warn

Constructor Details

#initialize ⇒ PostProcess

Settings up default postprocessing



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# File 'lib/ctioga2/postprocess.rb', line 59

def initialize
  @view_all = false
  @viewer = false
  @svg = false

  @png_res = nil 
  @png_oversampling = 2
  @png_scale = 1

  @processed_files = []
end

Instance Attribute Details

#eps ⇒ Object

Are we converting to EPS using pdftops ?



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# File 'lib/ctioga2/postprocess.rb', line 46

def eps
  @eps
end

#png_oversampling ⇒ Object

PNG oversampling: how many pixels are rendered for one target linear pixel (take that squared for the real number).



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# File 'lib/ctioga2/postprocess.rb', line 53

def png_oversampling
  @png_oversampling
end

#png_res ⇒ Object

PNG resolution



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# File 'lib/ctioga2/postprocess.rb', line 49

def png_res
  @png_res
end

#png_scale ⇒ Object

PNG scale: how many pixels for one postscript point ?



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# File 'lib/ctioga2/postprocess.rb', line 56

def png_scale
  @png_scale
end

#processed_files ⇒ Object

All files processed so far..



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# File 'lib/ctioga2/postprocess.rb', line 40

def processed_files
  @processed_files
end

#svg ⇒ Object

Are we converting to SVG using pdf2svg ?



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# File 'lib/ctioga2/postprocess.rb', line 43

def svg
  @svg
end

#view_all ⇒ Object

View all produced files – or only the last one ?



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# File 'lib/ctioga2/postprocess.rb', line 32

def view_all
  @view_all
end

#viewer ⇒ Object

The viewer command. If not nil, automatically spawn a viewer after the final figure, or for each produced file if view_all is on.



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# File 'lib/ctioga2/postprocess.rb', line 37

def viewer
  @viewer
end

Instance Method Details

#process_file(file, last = false) ⇒ Object

Process the given file. If last is true, things that should only happen last happen.



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# File 'lib/ctioga2/postprocess.rb', line 74

def process_file(file, last = false)
  @processed_files << file
  # Converts to SVG if applicable
  if @svg
    target = file.sub(/(\.pdf)?$/,'.svg')
    info { "Converting #{file} to SVG" }
    spawn("pdf2svg #{file} #{target}")
  end

  if @eps
    target = file.sub(/(\.pdf)?$/,'.eps')
    info { "Converting #{file} to EPS" }
    ## \todo provide some facility to pass options to pdftops ?
    spawn("pdftops -eps -level2 -paper match #{file} #{target}")
  end

  # Converts to PNG if applicable
  if @png_res
    target = file.sub(/(\.pdf)?$/,'.png')
    info { "Converting #{file} to PNG" }
    spawn "convert -density #{(@png_oversampling * @png_scale * 72).to_i} #{file} -resize #{@png_res.join('x')} #{target}"
  end

  # View produced PDF or PNG files...
  if (last || @view_all) && @viewer
    if @png_res
      cmd = "display #{target}"
    elsif @viewer =~ /%s/
      cmd = @viewer % file
    else
      cmd = "#{@viewer} #{file}"
    end
    info { "Spawning the viewer as requested for #{file}" }
    spawn(cmd)
  end
end