Class: Ucode::Glyphs::EmbeddedFonts::Renderer

Inherits:
Object
  • Object
show all
Defined in:
lib/ucode/glyphs/embedded_fonts/renderer.rb

Overview

Renders one codepoint's glyph by chaining the Catalog index lookup → FontEntry accessor → Svg wrapper.

Mirrors LastResort::Renderer: a Result struct is returned on success, nil on miss. The caller (Writer or CLI) decides how to handle misses — typically by falling back to the LastResort renderer.

Defined Under Namespace

Classes: Result

Instance Method Summary collapse

Constructor Details

#initialize(catalog) ⇒ Renderer

Returns a new instance of Renderer.

Parameters:



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# File 'lib/ucode/glyphs/embedded_fonts/renderer.rb', line 31

def initialize(catalog)
  @catalog = catalog
end

Instance Method Details

#render(codepoint) ⇒ Result?

Returns nil when no font in the PDF covers this codepoint, or when the GID's outline is empty.

Parameters:

  • codepoint (Integer)

Returns:

  • (Result, nil) —

    nil when no font in the PDF covers this codepoint, or when the GID's outline is empty



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# File 'lib/ucode/glyphs/embedded_fonts/renderer.rb', line 38

def render(codepoint)
  entry = @catalog.lookup(codepoint)
  return nil unless entry

  gid = entry.gid_for(codepoint)
  return nil unless gid

  outline = entry.accessor.outline_for_id(gid)
  return nil if outline.nil? || outline.empty?

  svg = Svg.new(outline, codepoint: codepoint, base_font: entry.base_font).to_s
  location = @catalog.location_for(codepoint)
  Result.new(
    codepoint: codepoint,
    base_font: entry.base_font,
    gid: gid,
    svg: svg,
    source_page: location&.fetch(:page),
    source_cell: location && { x: location[:x], y: location[:y] },
  )
end