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README
Gutenex
PDF generation!
So weird that it's still a thing for murderers in horror movies to keep clippings of their crimes. PDF that shit! — Julieanne Smolinkski
What started out as a wrapper for the Erlang erlguten library has turned into a full rewrite in Elixir.
Plan
Rewriting the basic PDF functionality means:
- [x] text
- [x] fonts
- [x] images
- [x] rendering/exporting
- [ ] parsing existing PDFs
- [ ] templating
- [ ] documentation
Usage
# Load image, get alias
{alpaca_alias, alpaca_rendition} = Gutenex.PDF.Images.load("./test/support/images/alpaca.png")
{:ok, pid} = Gutenex.start_link
Gutenex.add_image(pid, alpaca_alias, alpaca_rendition) |>
Gutenex.begin_text |>
Gutenex.set_font("Helvetica", 48) |>
Gutenex.text_position(40, 180) |>
Gutenex.text_render_mode(:fill) |>
Gutenex.write_text("ABC") |>
Gutenex.set_font("Courier", 32) |>
Gutenex.text_render_mode(:stroke) |>
Gutenex.write_text("xyz") |>
Gutenex.end_text |>
Gutenex.move_to(400, 20) |>
Gutenex.draw_image(alpaca_alias, %{
translate_x: 300,
translate_y: 500,
}) |>
Gutenex.export("./tmp/alpaca.pdf") |>
Gutenex.stop
Now open up that file and you should see some text near the bottom and a picture of what I believe to be an alpaca. Could also be a llama.
By default, coordinates are in units of 1/72 inch as per the PDF spec. Origin is in lower left corner of the page. This is roughly 1 point in printing terms.
Gutenex.line_width(pid, 0.01) # very fine line
|> Gutenex.line({{0, 0}, {500, 500}}) # up and to the right