PdfElixide.Document.SeparationPlate (pdf_elixide v0.23.0)

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One ink's coverage across a page, as a grayscale raster — the prepress view of what a single printing plate would lay down.

plates = PdfElixide.Document.Page.separations!(page, dpi: 150)
Enum.map(plates, & &1.ink)
#=> ["Cyan", "Magenta", "Yellow", "Black", "PANTONE 185 C"]

:data is one byte per pixel, row-major from the top-left corner, so byte_size(data) == width * height. The value is ink coverage, not lightness: 0 is bare paper and 255 is full tint. To show a plate the way a prepress viewer does — black ink on white paper — invert it first.

See the Rendering guide for which inks a page yields and how they relate to PdfElixide.Document.inks/3.

Summary

Types

t()

Types

t()

@type t() :: %PdfElixide.Document.SeparationPlate{
  data: binary(),
  height: non_neg_integer(),
  ink: String.t(),
  width: non_neg_integer()
}