From 52f80a68cb8d5e3b244153237331bdb895197ba7 Mon Sep 17 00:00:00 2001
From: Lynix <lynix680@gmail.com>
Date: Sat, 21 Apr 2018 00:28:57 +0200
Subject: [PATCH] Renderer/OpenGL: Enable GL_TEXTURE_CUBE_MAP_SEAMLESS

---
 ChangeLog.md                       | 1 +
 include/Nazara/Renderer/OpenGL.hpp | 1 +
 src/Nazara/Renderer/Context.cpp    | 3 +++
 src/Nazara/Renderer/OpenGL.cpp     | 3 +++
 4 files changed, 8 insertions(+)

diff --git a/ChangeLog.md b/ChangeLog.md
index 7dc258795..27b762a17 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -92,6 +92,7 @@ Nazara Engine:
 - ⚠️ Translucent2D pipeline no longer has depth sorting
 - Fixed SimpleTextDrawer line bounds
 - ⚠️ Stream::ReadLine will now returns empty lines if present in the file
+- Fixed cubemaps seams with OpenGL
 
 Nazara Development Kit:
 - Added ImageWidget (#139)
diff --git a/include/Nazara/Renderer/OpenGL.hpp b/include/Nazara/Renderer/OpenGL.hpp
index 7768930fb..c87426f12 100644
--- a/include/Nazara/Renderer/OpenGL.hpp
+++ b/include/Nazara/Renderer/OpenGL.hpp
@@ -38,6 +38,7 @@ namespace Nz
 		OpenGLExtension_FP64,
 		OpenGLExtension_GetProgramBinary,
 		OpenGLExtension_SeparateShaderObjects,
+		OpenGLExtension_SeamlessCubeMap,
 		OpenGLExtension_Shader_ImageLoadStore,
 		OpenGLExtension_TextureCompression_s3tc,
 		OpenGLExtension_TextureStorage,
diff --git a/src/Nazara/Renderer/Context.cpp b/src/Nazara/Renderer/Context.cpp
index 7fbad6002..90a17122d 100644
--- a/src/Nazara/Renderer/Context.cpp
+++ b/src/Nazara/Renderer/Context.cpp
@@ -163,6 +163,9 @@ namespace Nz
 			return false;
 		}
 
+		if (OpenGL::IsSupported(OpenGLExtension_SeamlessCubeMap))
+			glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
+
 		if (m_parameters.antialiasingLevel > 0)
 			glEnable(GL_MULTISAMPLE);
 
diff --git a/src/Nazara/Renderer/OpenGL.cpp b/src/Nazara/Renderer/OpenGL.cpp
index 7be48585f..0d6f07d2e 100644
--- a/src/Nazara/Renderer/OpenGL.cpp
+++ b/src/Nazara/Renderer/OpenGL.cpp
@@ -1174,6 +1174,9 @@ namespace Nz
 			}
 		}
 
+		// Seamless Cubemap Filtering
+		s_openGLextensions[OpenGLExtension_SeamlessCubeMap] = (s_openglVersion >= 320 || IsSupported("GL_ARB_seamless_cube_map"));
+
 		// Shader_ImageLoadStore
 		s_openGLextensions[OpenGLExtension_Shader_ImageLoadStore] = (s_openglVersion >= 420 || IsSupported("GL_ARB_shader_image_load_store"));