Class: Idml::Render::Pipeline

Inherits:
Object
  • Object
show all
Defined in:
lib/idml/render/pipeline.rb

Overview

Top-level pipeline: IDML Package → PDF file using pdfrb. All PDF assembly is delegated to pdfrb; this class orchestrates the high-level flow:

1. Build writer + set metadata.
2. Apply compliance (PDF/A XMP + ICC) if requested.
3. Set up structure tracker for tagged PDF.
4. Resolve document font.
5. For each spread: collect images, render pages, emit hyperlinks.
6. Flush structure, emit bookmarks, subset fonts, write.

Constant Summary collapse

DEFAULT_WIDTH = 
612
DEFAULT_HEIGHT = 
792

Instance Method Summary collapse

Constructor Details

#initialize(package, output_path, font_search_paths = nil, compliance: nil, tagged: false, subset_fonts: true, compress: false) ⇒ Pipeline

Returns a new instance of Pipeline.



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# File 'lib/idml/render/pipeline.rb', line 19

def initialize(package, output_path, font_search_paths = nil,
               compliance: nil, tagged: false, subset_fonts: true,
               compress: false)
  @package = package
  @output_path = output_path
  @font_search_paths = font_search_paths
  @compliance = compliance
  @tagged = tagged
  @subset_fonts = subset_fonts
  @compress = compress
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/idml/render/pipeline.rb', line 31

def call
  writer = PdfrbWriter.new(compress: @compress)
  metadata = MetadataBuilder.new(@package).build
  writer.set_info(metadata)
  writer.enable_tagged if @tagged
  apply_compliance(writer, metadata) if pdfa_requested?

  structure = StructureTracker.new(enabled: @tagged)
  position_tracker = PositionTracker.new
  layer_filter = LayerFilter.from_designmap(@package.designmap)
  condition_filter = ConditionFilter.from_designmap(@package.designmap)
  style_lookup = StyleLookup.from_package(@package)
  font_ref_resolver = FontReferenceResolver.build(@package)
  font_setup = FontSetup.new(package: @package,
                             font_search_paths: @font_search_paths)
  font_resource = font_setup.register(writer)
  font_metrics = font_setup.metrics_for(writer, font_resource)
  font_map = font_setup.font_map(writer)

  page_index = -1
  @package.spreads.each do |spread|
    page_index = render_spread(writer, spread, layer_filter,
                               font_ref_resolver, font_resource,
                               font_metrics, font_map, structure,
                               position_tracker, condition_filter,
                               style_lookup, page_index)
  end

  structure.flush(writer)
  writer.build_structure if @tagged
  emit_bookmarks(writer)
  writer.subset_fonts! if @subset_fonts
  writer.write(@output_path)
  @output_path
end