From 6dcaab2d3ad6ee6f12b34622a13dddf28772e840 Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Thu, 10 Oct 2019 15:18:45 +0200
Subject: [PATCH] glgsg: fix multisample FBO for 16-bit float buffer

Fixes #756
---
 panda/src/glstuff/glGraphicsBuffer_src.cxx | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/panda/src/glstuff/glGraphicsBuffer_src.cxx b/panda/src/glstuff/glGraphicsBuffer_src.cxx
index d5252944f5..d484a174e4 100644
--- a/panda/src/glstuff/glGraphicsBuffer_src.cxx
+++ b/panda/src/glstuff/glGraphicsBuffer_src.cxx
@@ -1198,7 +1198,11 @@ bind_slot_multisample(bool rb_resize, Texture **attach, RenderTexturePlane slot,
         if (_fb_properties.get_srgb_color()) {
           gl_format = GL_SRGB8_ALPHA8;
         } else if (_fb_properties.get_float_color()) {
-          gl_format = GL_RGBA32F_ARB;
+          if (_fb_properties.get_color_bits() > 16 * 3) {
+            gl_format = GL_RGBA32F_ARB;
+          } else {
+            gl_format = GL_RGBA16F_ARB;
+          }
         } else {
           gl_format = GL_RGBA;
         }