From 3f91615a2263f95fda40ae5cc427bcf67e2064f5 Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Fri, 23 Nov 2018 00:22:34 +0100
Subject: [PATCH] glgsg: reset color write mask before calling draw callback

---
 panda/src/glstuff/glGraphicsStateGuardian_src.cxx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/panda/src/glstuff/glGraphicsStateGuardian_src.cxx b/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
index 4a80e7044a..8e9105de1c 100644
--- a/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
+++ b/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
@@ -3754,6 +3754,10 @@ clear_before_callback() {
   _glClientActiveTexture(GL_TEXTURE0);
 #endif
 
+  // It's also quite reasonable to presume there aren't any funny color write
+  // mask settings active.
+  clear_color_write_mask();
+
   // Clear the bound sampler object, so that we do not inadvertently override
   // the callback's desired sampler settings.
 #ifndef OPENGLES_1