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import pytest
from pathlib import Path
from fpdf import FPDF
from fpdf.drawing import PaintedPath, PaintComposite
from fpdf.enums import CompositingOperation, PathPaintRule
from test.conftest import assert_pdf_equal
HERE = Path(__file__).resolve().parent
def _blue_square():
p = PaintedPath()
p.rectangle(10, 10, 50, 50)
p.style.fill_color = "#0000ff"
p.style.fill_opacity = 1
p.style.paint_rule = PathPaintRule.FILL_NONZERO
return p
def _red_square():
p = PaintedPath()
p.rectangle(35, 35, 50, 50)
p.style.fill_color = "#ff0000"
p.style.fill_opacity = 1
p.style.paint_rule = PathPaintRule.FILL_NONZERO
return p
def _generate_pdf(op: CompositingOperation):
pdf = FPDF()
pdf.page_background = (211, 211, 211)
pdf.add_page()
with pdf.drawing_context() as gc:
src = _blue_square()
dst = _red_square()
comp = PaintComposite(backdrop=dst, source=src, operation=op)
gc.add_item(comp)
return pdf
@pytest.mark.parametrize(
"op",
[
CompositingOperation.CLEAR,
CompositingOperation.SOURCE,
CompositingOperation.DESTINATION,
CompositingOperation.SOURCE_OVER,
CompositingOperation.DESTINATION_OVER,
CompositingOperation.SOURCE_IN,
CompositingOperation.DESTINATION_IN,
CompositingOperation.SOURCE_OUT,
CompositingOperation.DESTINATION_OUT,
CompositingOperation.SOURCE_ATOP,
CompositingOperation.DESTINATION_ATOP,
CompositingOperation.XOR,
],
)
def test_compositing_operations(op, tmp_path):
pdf = _generate_pdf(op)
name = f"compositing_{op.value}.pdf"
assert_pdf_equal(
pdf,
HERE / "generated_pdf" / name,
tmp_path,
)
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