From b44f187328fe26fba24fd38ea542201a543e6c38 Mon Sep 17 00:00:00 2001
From: legoboyvdlp R <legoboyvdlp@gmail.com>
Date: Sat, 31 Jul 2021 14:58:40 +0100
Subject: [PATCH] Canvas: instead of setting anisotropy directly, set it by the
 same mechanism as mipmapping

---
 simgear/canvas/Canvas.cxx | 9 ++++++++-
 simgear/canvas/Canvas.hxx | 1 +
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/simgear/canvas/Canvas.cxx b/simgear/canvas/Canvas.cxx
index ca604077..c2ef349f 100644
--- a/simgear/canvas/Canvas.cxx
+++ b/simgear/canvas/Canvas.cxx
@@ -405,6 +405,13 @@ namespace canvas
       _sampling_dirty = false;
       _render_dirty = true;
     }
+	
+    if( _anisotropy_dirty )
+    {
+      _texture.setMaxAnisotropy( _node->getFloatValue("anisotropy") );
+      _anisotropy_dirty = false;
+      _render_dirty = true;
+    }
 
     while( !_dirty_placements.empty() )
     {
@@ -698,7 +705,7 @@ namespace canvas
       }
       else if( name == "anisotropy" )
       {
-        _texture.setMaxAnisotropy( node->getFloatValue() );
+        _anisotropy_dirty = true;
       }
       else if( name == "additive-blend" )
       {
diff --git a/simgear/canvas/Canvas.hxx b/simgear/canvas/Canvas.hxx
index 10b7403c..469d77e8 100644
--- a/simgear/canvas/Canvas.hxx
+++ b/simgear/canvas/Canvas.hxx
@@ -238,6 +238,7 @@ namespace canvas
       PropertyObject<std::string>   _status_msg;
 
       bool _sampling_dirty {false},
+           _anisotropy_dirty {false},
            _render_dirty {true},
            _visible {true};