From e4f1d9952bed9c02a92a80148cc49b29291b58d5 Mon Sep 17 00:00:00 2001
From: gnnoh <48518325+gnnoh@users.noreply.github.com>
Date: Wed, 31 Aug 2022 16:49:22 +0800
Subject: [PATCH] Make dvipng use transparent background by default (#2036)

* make dvipng use transparent background by default

Note that if using all-lowercase 'transparent', it will give "a simple fully transparent background with non-transparent antialiased pixels", which is unnecessary.

* latex.py: format
---
 pylib/anki/latex.py | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/pylib/anki/latex.py b/pylib/anki/latex.py
index c2033523b..e492422c8 100644
--- a/pylib/anki/latex.py
+++ b/pylib/anki/latex.py
@@ -17,7 +17,18 @@ from anki.utils import call, is_mac, namedtmp, tmpdir
 
 pngCommands = [
     ["latex", "-interaction=nonstopmode", "tmp.tex"],
-    ["dvipng", "-D", "200", "-T", "tight", "tmp.dvi", "-o", "tmp.png"],
+    [
+        "dvipng",
+        "-bg",
+        "Transparent",
+        "-D",
+        "200",
+        "-T",
+        "tight",
+        "tmp.dvi",
+        "-o",
+        "tmp.png",
+    ],
 ]
 
 svgCommands = [