From a0cb576950b32b57fc99de8ffc49342991d9ed87 Mon Sep 17 00:00:00 2001
From: Lubos <tridosm@gmail.com>
Date: Sun, 1 May 2022 18:17:27 +0200
Subject: [PATCH] Clearing alpha channel of FBO fixes a few menu issues

---
 android/app/src/main/cpp/code/vr/vr_renderer.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/android/app/src/main/cpp/code/vr/vr_renderer.c b/android/app/src/main/cpp/code/vr/vr_renderer.c
index d00235a7..eaadd43c 100644
--- a/android/app/src/main/cpp/code/vr/vr_renderer.c
+++ b/android/app/src/main/cpp/code/vr/vr_renderer.c
@@ -345,6 +345,12 @@ void VR_DrawFrame( engine_t* engine ) {
 
 		Com_Frame();
 
+		// Clear the alpha channel, other way VR API would not transfer the framebuffer fully
+		glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE);
+		glClearColor(0.0, 0.0, 0.0, 1.0);
+		glClear(GL_COLOR_BUFFER_BIT);
+		glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+
 		engine->framebuffers.swapchainIndex = (engine->framebuffers.swapchainIndex + 1) %
 			engine->framebuffers.swapchainLength;