From 210c9ea64af0a2bcdd9a68fb6ee9432b43099594 Mon Sep 17 00:00:00 2001
From: Sergey Lipskiy <gonetz@ngs.ru>
Date: Fri, 3 Feb 2017 21:28:06 +0700
Subject: [PATCH] Do not attach depth buffer to frame buffer if same depth
 buffer already attached.

---
 src/FrameBuffer.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/FrameBuffer.cpp b/src/FrameBuffer.cpp
index 5ef9ad2f..b95e1d44 100644
--- a/src/FrameBuffer.cpp
+++ b/src/FrameBuffer.cpp
@@ -771,6 +771,9 @@ void FrameBufferList::attachDepthBuffer()
 	glDiscardFramebufferEXT(GL_FRAMEBUFFER, 1, discards);
 #endif
 	DepthBuffer * pDepthBuffer = depthBufferList().getCurrent();
+	if (m_pCurrent->m_pDepthBuffer == pDepthBuffer)
+		return;
+
 	if (m_pCurrent->m_FBO.isNotNull() && pDepthBuffer != nullptr) {
 		pDepthBuffer->initDepthImageTexture(m_pCurrent);
 		pDepthBuffer->initDepthBufferTexture(m_pCurrent);