From eeae05773e088d25fea61844c703c5fc8ea8a2f9 Mon Sep 17 00:00:00 2001
From: Raphael Michel <michel@rami.io>
Date: Fri, 17 Jan 2025 17:27:33 +0100
Subject: [PATCH] Invoice rendering: Remove logos from transparency

---
 src/pretix/base/invoice.py      | 5 +++++
 src/pretix/helpers/reportlab.py | 6 ++++++
 2 files changed, 11 insertions(+)

diff --git a/src/pretix/base/invoice.py b/src/pretix/base/invoice.py
index ef9d00bf0..c19641ef0 100644
--- a/src/pretix/base/invoice.py
+++ b/src/pretix/base/invoice.py
@@ -388,6 +388,11 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
             except:
                 logger.exception("Can not resize image")
                 pass
+            try:
+                ir.remove_transparency()
+            except:
+                logger.exception("Can not remove transparency from logo")
+                pass
             canvas.drawImage(ir,
                              self.logo_left,
                              self.pagesize[1] - self.logo_height - self.logo_top,
diff --git a/src/pretix/helpers/reportlab.py b/src/pretix/helpers/reportlab.py
index b2af459c6..275d0205c 100644
--- a/src/pretix/helpers/reportlab.py
+++ b/src/pretix/helpers/reportlab.py
@@ -39,6 +39,12 @@ class ThumbnailingImageReader(ImageReader):
         self._data = None
         return width, height
 
+    def remove_transparency(self, background_color="WHITE"):
+        if "A" in self._image.mode:
+            new_image = Image.new("RGBA", self._image.size, background_color)
+            new_image.paste(self._image, mask=self._image)
+            self._image = new_image.convert("RGB")
+
     def _jpeg_fh(self):
         # Bypass a reportlab-internal optimization that falls back to the original
         # file handle if the file is a JPEG, and therefore does not respect the