[FIX] account: print image in pdf

To Reproduce
============
- create a vendor bill and add an image as attachment
- print Original Bill -> the generated pdf can't be loaded

Problem
=======
when trying to add an image attachment to pdf report, the image needs
a special process.

Solution
========
add the image processing when printing pdf
fix inspired from 15 [commit](https://github.com/odoo/odoo/commit/b82a6cdea21a66588ddcafcdfb5026ec22546745)

opw-3127535

closes odoo/odoo#112596

X-original-commit: 41c79f66cfb5cdb558110d32842198157932397e
Signed-off-by: William André (wan) <wan@odoo.com>

addons/account/models/ir_actions_report.py

@@ -1,5 +1,4 @@
 # -*- coding: utf-8 -*-
-import io
 import textwrap
 from collections import OrderedDict
 from PyPDF2.utils import PdfStreamError
@@ -29,8 +28,8 @@ class IrActionsReport(models.Model):
         for invoice in invoices:
             attachment = invoice.message_main_attachment_id
             if attachment:
-                stream = io.BytesIO(attachment.raw)
-                if attachment.mimetype == 'application/pdf':
+                stream = pdf.to_pdf_stream(attachment)
+                if stream:
                     record = self.env[attachment.res_model].browse(attachment.res_id)
                     try:
                         stream = pdf.add_banner(stream, record.name, logo=True)

odoo/tools/pdf.py

@@ -9,7 +9,7 @@ from logging import getLogger
 from PyPDF2 import PdfFileWriter, PdfFileReader
 from PyPDF2.generic import DictionaryObject, NameObject, ArrayObject, DecodedStreamObject, NumberObject, createStringObject, ByteStringObject
 from zlib import compress, decompress
-from PIL import Image
+from PIL import Image, PdfImagePlugin
 from reportlab.lib import colors
 from reportlab.lib.units import cm
 from reportlab.lib.utils import ImageReader
@@ -28,6 +28,9 @@ REGEX_SUBTYPE_UNFORMATED = re.compile(r'^\w+/[\w-]+$')
 REGEX_SUBTYPE_FORMATED = re.compile(r'^/\w+#2F[\w-]+$')
 
 
+# Disable linter warning: this import is needed to make sure a PDF stream can be saved in Image.
+PdfImagePlugin.__name__
+
 # make sure values are unwrapped by calling the specialized __getitem__
 def _unwrapping_get(self, key, default=None):
     try:
@@ -84,6 +87,18 @@ def rotate_pdf(pdf):
         return _buffer.getvalue()
 
 
+def to_pdf_stream(attachment) -> io.BytesIO:
+    """Get the byte stream of the attachment as a PDF."""
+    stream = io.BytesIO(attachment.raw)
+    if attachment.mimetype == 'application/pdf':
+        return stream
+    elif attachment.mimetype.startswith('image'):
+        output_stream = io.BytesIO()
+        Image.open(stream).convert("RGB").save(output_stream, format="pdf")
+        return output_stream
+    _logger.warning("mimetype (%s) not recognized for %s", attachment.mimetype, attachment)
+
+
 def add_banner(pdf_stream, text=None, logo=False, thickness=2 * cm):
     """ Add a banner on a PDF in the upper right corner, with Odoo's logo (optionally).