Add pdf tests

transfer_rotation_to_content (or rather add_transformation/replace_content) do not properly duplicate the contentstream they're modifying. this means that if you pass a pdf-level copy of the same bg_page multiple times, the content will be rotated multiple times but the rotation-property ('/Rotate') will only be changed for the first page

pypdfs docs explicitly say that you should not to add_transformation + merge, but instead use merge_transformed_page, which this now does for everything

src/pretix/base/exporters/invoices.py

@@ -54,6 +54,7 @@ from ...control.forms.filter import get_all_payment_providers
 from ...helpers import GroupConcat
 from ...helpers.iter import chunked_iterable
 from ..exporter import BaseExporter, MultiSheetListExporter
+from ..invoicing.transmission import get_transmission_types
 from ..services.export import ExportError
 from ..services.invoices import invoice_pdf_task
 from ..signals import (
@@ -197,7 +198,7 @@ class InvoiceDataExporter(InvoiceExporterMixin, MultiSheetListExporter):
     def iterate_sheet(self, form_data, sheet):
         _ = gettext
         if sheet == 'invoices':
-            yield [
+            headers = [
                 _('Invoice number'),
                 _('Date'),
                 _('Order code'),
@@ -230,8 +231,18 @@ class InvoiceDataExporter(InvoiceExporterMixin, MultiSheetListExporter):
                 _('Total value (without taxes)'),
                 _('Payment matching IDs'),
                 _('Payment providers'),
+                _('Transmission type'),
+                _('Transmission status'),
+                _('Transmission date'),
             ]
 
+            transmission_types = get_transmission_types()
+            for tt in transmission_types:
+                for c in tt.describe_info_columns():
+                    headers.append(str(tt.verbose_name) + ': ' + str(c))
+
+            yield headers
+
             p_providers = OrderPayment.objects.filter(
                 order=OuterRef('order'),
                 state__in=(OrderPayment.PAYMENT_STATE_CONFIRMED, OrderPayment.PAYMENT_STATE_REFUNDED,
@@ -242,7 +253,7 @@ class InvoiceDataExporter(InvoiceExporterMixin, MultiSheetListExporter):
                 'm'
             ).order_by()
 
-            base_qs = self.invoices_queryset(form_data)\
+            base_qs = self.invoices_queryset(form_data)
 
             qs = base_qs.select_related(
                 'order', 'refers'
@@ -280,7 +291,7 @@ class InvoiceDataExporter(InvoiceExporterMixin, MultiSheetListExporter):
                                 if mid:
                                     pmis.append(mid)
                     pmi = '\n'.join(pmis)
-                    yield [
+                    line = [
                         i.full_invoice_no,
                         date_format(i.date, "SHORT_DATE_FORMAT"),
                         i.order.code,
@@ -315,8 +326,20 @@ class InvoiceDataExporter(InvoiceExporterMixin, MultiSheetListExporter):
                         ', '.join([
                             str(self.providers.get(p, p)) for p in sorted(set((i.payment_providers or '').split(',')))
                             if p and p != 'free'
-                        ])
+                        ]),
+                        i.transmission_type_instance.verbose_name,
+                        i.get_transmission_status_display(),
+                        date_format(i.transmission_date, "SHORT_DATETIME_FORMAT") if i.transmission_date else "",
                     ]
+                    for tt in transmission_types:
+                        if tt.identifier == i.transmission_type:
+                            described = dict(tt.describe_info(i.invoice_to_transmission_info, i.invoice_to_country, i.invoice_to_is_business))
+                            for c in tt.describe_info_columns():
+                                line.append(described.get(c, ""))
+                        else:
+                            for c in tt.describe_info_columns():
+                                line.append("")
+                    yield line
         elif sheet == 'lines':
             yield [
                 _('Invoice number'),

src/pretix/base/invoicing/transmission.py

@@ -107,6 +107,9 @@ class TransmissionType:
     def transmission_info_to_form_data(self, transmission_info: dict) -> dict:
         return transmission_info
 
+    def describe_info_columns(self):
+        return [f.label for f in self.invoice_address_form_fields.values()]
+
     def describe_info(self, transmission_info: dict, country: Country, is_business: bool):
         form_data = self.transmission_info_to_form_data(transmission_info)
         data = []

src/pretix/base/pdf.py

@@ -801,6 +801,18 @@ def generate_compressed_addon_list(op, order, event, only_checked_in=False):
     return addonlist
 
 
+def get_sizebox(page: pypdf.PageObject):
+    mediabox = page.mediabox
+    cropbox = page.cropbox
+
+    return pypdf.generic.RectangleObject((
+        max(mediabox[0], cropbox[0]),
+        max(mediabox[1], cropbox[1]),
+        min(mediabox[2], cropbox[2]),
+        min(mediabox[3], cropbox[3]),
+    ))
+
+
 class Renderer:
 
     def __init__(self, event, layout, background_file):
@@ -1153,11 +1165,10 @@ class Renderer:
                 elif o['type'] == "poweredby":
                     self._draw_poweredby(canvas, op, o)
                 if self.bg_pdf:
-                    page_size = (
-                        self.bg_pdf.pages[0].mediabox[2] - self.bg_pdf.pages[0].mediabox[0],
-                        self.bg_pdf.pages[0].mediabox[3] - self.bg_pdf.pages[0].mediabox[1]
-                    )
-                    if self.bg_pdf.pages[0].get('/Rotate') in (90, 270):
+                    first_page = self.bg_pdf.pages[0]
+                    sizebox = get_sizebox(first_page)
+                    page_size = (sizebox.width, sizebox.height)
+                    if first_page.rotation in (90, 270):
                         # swap dimensions due to pdf being rotated
                         page_size = page_size[::-1]
                     canvas.setPageSize(page_size)
@@ -1312,14 +1323,18 @@ def merge_background(fg_pdf: PdfWriter, bg_pdf: PdfWriter, out_file, compress):
 
 
 def _merge_with_correct_page_media_box(output: pypdf.PdfWriter, fg_page: pypdf.PageObject, bg_page: pypdf.PageObject):
-    if bg_page.rotation != 0:
-        bg_page.transfer_rotation_to_content()
-    media_box = bg_page.mediabox
+    """
+    Adds fg_page to output, merging bg_page behind it.
+
+    If bg_page has a non-zero mergebox/cropbox or is rotated via /Rotate, a transformation is applied to fix this."""
     trsf = pypdf.Transformation()
-    if media_box.bottom != 0:
-        trsf = trsf.translate(0, -media_box.bottom)
-    if media_box.left != 0:
-        trsf = trsf.translate(-media_box.left, 0)
+    if bg_page.rotation != 0:
+        trsf = trsf.rotate(-bg_page.rotation)
+
+    mb = get_sizebox(bg_page)
+    pt1 = trsf.apply_on(mb.lower_left)
+    pt2 = trsf.apply_on(mb.upper_right)
+    trsf = trsf.translate(-min(pt1[0], pt2[0]), -min(pt1[1], pt2[1]))
 
     fg_page = output.add_page(fg_page)
     fg_page.merge_transformed_page(bg_page, trsf, over=False, expand=False)

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src/tests/plugins/badges/assets/bg-mediabox-offset/bg.pdf

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+2015
+%%EOF

src/tests/plugins/badges/test_pdf.py

@@ -32,13 +32,18 @@
 # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations under the License.
 
+import tempfile
 from datetime import timedelta
 from decimal import Decimal
 from io import BytesIO
+from pathlib import Path
 
+import pypdfium2
 import pytest
+from django.core.files import File
 from django.utils.timezone import now
 from django_scopes import scope
+from PIL import ImageChops
 from pypdf import PdfReader
 
 from pretix.base.models import (
@@ -118,3 +123,49 @@ def test_generate_pdf_multi(env):
     assert ftype == 'application/pdf'
     pdf = PdfReader(BytesIO(buf))
     assert len(pdf.pages) == 1
+
+
+def test_asset(name):
+    return Path(__file__).parent / "assets" / name
+
+
+def compare_pdfs(inp_a: Path | bytes, inp_b: Path | bytes):
+    pdf_a = pypdfium2.PdfDocument(inp_a)
+    pdf_b = pypdfium2.PdfDocument(inp_b)
+
+    assert len(pdf_a) == len(pdf_b)
+
+    for i, (expected_page, output_page) in enumerate(zip(pdf_a, pdf_b)):
+        expected_render = expected_page.render()
+        output_render = output_page.render()
+        assert expected_render.height == output_render.height
+        assert expected_render.width == output_render.width
+
+        diff = ImageChops.difference(expected_render.to_pil(), output_render.to_pil())
+        if diff.getbbox():
+            with tempfile.NamedTemporaryFile(delete=False, suffix=".png") as f:
+                diff.save(f)
+            assert not diff.getbbox(), f"Page {i} differs. Diff was written to {f.name}"
+
+
+@pytest.mark.django_db
+@pytest.mark.parametrize("case", [
+    "bg-rotated",
+    "bg-mediabox-offset",
+    "bg-cropbox"
+])
+def test_generate_pdf_weird_bgs(env, case):
+    event, order, shirt = env
+    asset_folder = test_asset(case)
+    with open(asset_folder / "bg.pdf", 'rb') as fi:
+        event.badge_layouts.create(name="Default", default=True, background=File(fi, name="test.pdf"))
+    e = BadgeExporter(event, organizer=event.organizer)
+    fname, ftype, buf = e.render({
+        'items': [shirt.pk],
+        'rendering': 'one',
+        'include_pending': True
+    })
+    assert ftype == 'application/pdf'
+    assert buf
+
+    compare_pdfs(buf, asset_folder / "expected.pdf")