From da7ae5394142504d6fe86ce792e37f4826e048a8 Mon Sep 17 00:00:00 2001
From: Erwin Coumans <erwin.coumans@gmail.com>
Date: Tue, 20 Dec 2016 17:34:12 -0800
Subject: [PATCH] render regular view on desktop in VR, instead of distortion
 view.

---
 examples/StandaloneMain/hellovr_opengl_main.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/examples/StandaloneMain/hellovr_opengl_main.cpp b/examples/StandaloneMain/hellovr_opengl_main.cpp
index 1a840b834..1924869b6 100644
--- a/examples/StandaloneMain/hellovr_opengl_main.cpp
+++ b/examples/StandaloneMain/hellovr_opengl_main.cpp
@@ -21,6 +21,7 @@
 #include "LinearMath/btIDebugDraw.h"
 int gSharedMemoryKey = -1;
 int  gDebugDrawFlags = 0;
+bool gDisplayDistortion = false;
 
 //how can you try typing on a keyboard, without seeing it?
 //it is pretty funny, to see the desktop in VR!
@@ -831,15 +832,31 @@ void CMainApplication::RenderFrame()
 			DrawControllers();
 		}
 		RenderStereoTargets();
+
+		if (gDisplayDistortion)
 		{
 			B3_PROFILE("RenderDistortion");
 			RenderDistortion();
+		} else
+		{
+			glBindFramebuffer( GL_FRAMEBUFFER, 0 );
+			glDisable( GL_MULTISAMPLE );
+	 		glBindFramebuffer(GL_READ_FRAMEBUFFER, rightEyeDesc.m_nRenderFramebufferId );
+			glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+	
+			glBlitFramebuffer( 0, 0, m_nRenderWidth, m_nRenderHeight, 0, 0, m_nRenderWidth, m_nRenderHeight, 
+				GL_COLOR_BUFFER_BIT,
+ 				GL_LINEAR  );
+
+ 			glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
+			glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0 );
 		}
 
 		vr::Texture_t leftEyeTexture = {(void*)leftEyeDesc.m_nResolveTextureId, vr::API_OpenGL, vr::ColorSpace_Gamma };
 		vr::VRCompositor()->Submit(vr::Eye_Left, &leftEyeTexture );
 		vr::Texture_t rightEyeTexture = {(void*)rightEyeDesc.m_nResolveTextureId, vr::API_OpenGL, vr::ColorSpace_Gamma };
 		vr::VRCompositor()->Submit(vr::Eye_Right, &rightEyeTexture );
+		
 	}
 
 	if ( m_bVblank && m_bGlFinishHack )