From c05d164eee99f017631068fde7752c987930455d Mon Sep 17 00:00:00 2001
From: kd-11 <karokidii@gmail.com>
Date: Mon, 22 Jan 2018 13:07:52 +0300
Subject: [PATCH] gl: Implement swap control on linux

---
 rpcs3/Emu/RSX/GL/OpenGL.cpp | 19 ++++++++++++++++++-
 rpcs3/Emu/RSX/GL/OpenGL.h   |  1 +
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/rpcs3/Emu/RSX/GL/OpenGL.cpp b/rpcs3/Emu/RSX/GL/OpenGL.cpp
index d1e99f2ff0..65828dbb39 100644
--- a/rpcs3/Emu/RSX/GL/OpenGL.cpp
+++ b/rpcs3/Emu/RSX/GL/OpenGL.cpp
@@ -34,6 +34,9 @@ void gl::init()
 #ifdef __unix__
 	glewExperimental = true;
 	glewInit();
+#ifndef __APPLE__
+	glxewInit();
+#endif
 #endif
 }
 
@@ -41,5 +44,19 @@ void gl::set_swapinterval(int interval)
 {
 #ifdef _WIN32
 	wglSwapIntervalEXT(interval);
+#elif !defined(__APPLE__)
+	if (glXSwapIntervalEXT)
+	{
+		if (auto window = glXGetCurrentDrawable())
+		{
+			glXSwapIntervalEXT(glXGetCurrentDisplay(), window, interval);
+			return;
+		}
+	}
+
+	//No existing drawable or missing swap extension, EGL?
+	LOG_ERROR(RSX, "Failed to set swap interval");
+#else
+	LOG_UNIMPLEMENTED(RSX, "Swap control not implemented for this platform. Vsync options not available.");
 #endif
-}
\ No newline at end of file
+}
diff --git a/rpcs3/Emu/RSX/GL/OpenGL.h b/rpcs3/Emu/RSX/GL/OpenGL.h
index 5db08ebfaa..487745b837 100644
--- a/rpcs3/Emu/RSX/GL/OpenGL.h
+++ b/rpcs3/Emu/RSX/GL/OpenGL.h
@@ -22,6 +22,7 @@ typedef BOOL (WINAPI* PFNWGLSWAPINTERVALEXTPROC) (int interval);
 #include <OpenGL/glu.h>
 
 #else
+#include <GL/glxew.h>
 #include <GL/gl.h>
 #include <GL/glx.h>
 #include <GL/glxext.h>