From ce846b9d95afd5fed88fca025c68c103c9580236 Mon Sep 17 00:00:00 2001
From: kervala <kervala@localhost>
Date: Thu, 7 Jan 2016 17:39:11 +0100
Subject: [PATCH] Changed: Added VideoMemory variable in cfg to force video
 memory to use (useful if Ryzom can't detect the correct amount of video
 memory or when using several clients at once)

---
 code/ryzom/client/src/client_cfg.cpp     |  3 +++
 code/ryzom/client/src/client_cfg.h       |  2 ++
 code/ryzom/client/src/init_main_loop.cpp | 26 ++++++++++++++++--------
 3 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/code/ryzom/client/src/client_cfg.cpp b/code/ryzom/client/src/client_cfg.cpp
index 76d730156..83f73afae 100644
--- a/code/ryzom/client/src/client_cfg.cpp
+++ b/code/ryzom/client/src/client_cfg.cpp
@@ -419,6 +419,7 @@ CClientConfig::CClientConfig()
 	HDTextureInstalled	= false;
 	Fog					= true;						// Fog is on by default
 	WaitVBL				= false;
+	VideoMemory			= 0;
 
 	FXAA				= true;
 
@@ -1051,6 +1052,8 @@ void CClientConfig::setValues()
 
 	// WaitVBL
 	READ_BOOL_FV(WaitVBL)
+	// VideoMemory
+	READ_INT_FV(VideoMemory);
 
 	READ_INT_DEV(TimerMode)
 
diff --git a/code/ryzom/client/src/client_cfg.h b/code/ryzom/client/src/client_cfg.h
index bbf9e4562..75c7698da 100644
--- a/code/ryzom/client/src/client_cfg.h
+++ b/code/ryzom/client/src/client_cfg.h
@@ -255,6 +255,8 @@ struct CClientConfig
 	bool			Fog;
 	/// Enable/Disable VSync
 	bool			WaitVBL;
+	/// Force or auto-detect video memory (in MiB)
+	sint			VideoMemory;
 
 	/// Timer mode. 0 : QueryPerformanceCounter, 1 : timeGetTime.
 	uint			TimerMode;
diff --git a/code/ryzom/client/src/init_main_loop.cpp b/code/ryzom/client/src/init_main_loop.cpp
index a07f74de4..dc9a907b7 100644
--- a/code/ryzom/client/src/init_main_loop.cpp
+++ b/code/ryzom/client/src/init_main_loop.cpp
@@ -891,18 +891,28 @@ void initMainLoop()
 				// only detect amount of video memory if using HD textures
 				if (ClientCfg.HDEntityTexture)
 				{
-					// determine video memory using 3D driver
-					videoMemory = Driver->getTotalVideoMemory();
+					if (ClientCfg.VideoMemory <= 0)
+					{
+						// determine video memory using 3D driver
+						videoMemory = Driver->getTotalVideoMemory();
 
-					// if unable to determine, use plaform methods
-					if (videoMemory < 0) videoMemory = CSystemUtils::getTotalVideoMemory();
+						// if unable to determine, use plaform methods
+						if (videoMemory <= 0) videoMemory = CSystemUtils::getTotalVideoMemory();
 
-					// in the worst case, use default value of 128 MiB
-					if (videoMemory < 0) videoMemory = 128 * 1024;
+						// in the worst case, use default value of 128 MiB
+						if (videoMemory <= 0) videoMemory = 128 * 1024;
 
-					videoMemory /= 1024; // size in MiB
+						videoMemory /= 1024; // size in MiB
 
-					nlinfo("Video memory detected: %d MiB", videoMemory);
+						nlinfo("Video memory detected: %d MiB", videoMemory);
+					}
+					else
+					{
+						// force video memory (at least 32 MiB)
+						videoMemory = ClientCfg.VideoMemory < 32 ? 32:ClientCfg.VideoMemory;
+
+						nlinfo("Video memory forced: %d MiB", videoMemory);
+					}
 				}
 				else
 				{