From 4f9c33de640a748d020e63c7c85ccbbe341ab7a7 Mon Sep 17 00:00:00 2001
From: number Zero <numzer0@yandex.ru>
Date: Mon, 5 Nov 2018 15:22:13 +0300
Subject: [PATCH] Disable HW stereo for IrrLicht 1.9 (not supported anymore)

---
 src/client/render/factory.cpp  | 2 ++
 src/client/render/pageflip.cpp | 4 ++++
 src/client/render/pageflip.h   | 6 ++++++
 3 files changed, 12 insertions(+)

diff --git a/src/client/render/factory.cpp b/src/client/render/factory.cpp
index 3aabc5db..30f9480f 100644
--- a/src/client/render/factory.cpp
+++ b/src/client/render/factory.cpp
@@ -35,8 +35,10 @@ RenderingCore *createRenderingCore(const std::string &stereo_mode, IrrlichtDevic
 		return new RenderingCoreAnaglyph(device, client, hud);
 	if (stereo_mode == "interlaced")
 		return new RenderingCoreInterlaced(device, client, hud);
+#ifdef STEREO_PAGEFLIP_SUPPORTED
 	if (stereo_mode == "pageflip")
 		return new RenderingCorePageflip(device, client, hud);
+#endif
 	if (stereo_mode == "sidebyside")
 		return new RenderingCoreSideBySide(device, client, hud);
 	if (stereo_mode == "topbottom")
diff --git a/src/client/render/pageflip.cpp b/src/client/render/pageflip.cpp
index 5d81a257..f3a21905 100644
--- a/src/client/render/pageflip.cpp
+++ b/src/client/render/pageflip.cpp
@@ -20,6 +20,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #include "pageflip.h"
 
+#ifdef STEREO_PAGEFLIP_SUPPORTED
+
 void RenderingCorePageflip::initTextures()
 {
 	hud = driver->addRenderTargetTexture(
@@ -53,3 +55,5 @@ void RenderingCorePageflip::resetEye()
 	driver->setRenderTarget(video::ERT_FRAME_BUFFER, false, false, skycolor);
 	RenderingCoreStereo::resetEye();
 }
+
+#endif // STEREO_PAGEFLIP_SUPPORTED
diff --git a/src/client/render/pageflip.h b/src/client/render/pageflip.h
index cc943705..17711b0f 100644
--- a/src/client/render/pageflip.h
+++ b/src/client/render/pageflip.h
@@ -21,6 +21,10 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #pragma once
 #include "stereo.h"
 
+// The support is absent in 1.9.0 (dropped in r5068)
+#if (IRRLICHT_VERSION_MAJOR == 1) && (IRRLICHT_VERSION_MINOR <= 8)
+#define STEREO_PAGEFLIP_SUPPORTED
+
 class RenderingCorePageflip : public RenderingCoreStereo
 {
 protected:
@@ -35,3 +39,5 @@ public:
 	using RenderingCoreStereo::RenderingCoreStereo;
 	void drawAll() override;
 };
+
+#endif