From 9e9216405fb999a1a6c4f8865264f4e7e335e7aa Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 25 Apr 2021 00:32:45 +0300
Subject: [PATCH] Use seamless cube map filtering if available

---
 extensions/arb_seamless_cube_map.glext | 4 ++++
 source/core/texturecube.cpp            | 3 +++
 2 files changed, 7 insertions(+)
 create mode 100644 extensions/arb_seamless_cube_map.glext

diff --git a/extensions/arb_seamless_cube_map.glext b/extensions/arb_seamless_cube_map.glext
new file mode 100644
index 00000000..60f43c5d
--- /dev/null
+++ b/extensions/arb_seamless_cube_map.glext
@@ -0,0 +1,4 @@
+extension ARB_seamless_cube_map
+# AMD_seamless_cubemap_per_texture contains the same enum but has orthogonal
+# semantics
+source none
diff --git a/source/core/texturecube.cpp b/source/core/texturecube.cpp
index 1c6c4962..01820fa8 100644
--- a/source/core/texturecube.cpp
+++ b/source/core/texturecube.cpp
@@ -1,4 +1,5 @@
 #include <msp/datafile/collection.h>
+#include <msp/gl/extensions/arb_seamless_cube_map.h>
 #include <msp/gl/extensions/arb_texture_cube_map.h>
 #include <msp/gl/extensions/arb_texture_storage.h>
 #include <msp/io/memory.h>
@@ -49,6 +50,8 @@ TextureCube::TextureCube():
 	allocated(0)
 {
 	static Require _req(ARB_texture_cube_map);
+	if(ARB_seamless_cube_map)
+		glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
 }
 
 void TextureCube::storage(PixelFormat fmt, unsigned sz, unsigned lv)
-- 
2.43.0