From f5ff378dd02431cdcf658b210509b170ea2135d1 Mon Sep 17 00:00:00 2001
From: Perttu Ahola <celeron55@gmail.com>
Date: Sat, 19 Feb 2011 11:48:54 +0200
Subject: [PATCH] video backend selection

---
 minetest.conf.example   | 27 ++++++++++++++++++++-------
 src/defaultsettings.cpp |  1 +
 src/main.cpp            | 37 ++++++++++++++++++++++++-------------
 3 files changed, 45 insertions(+), 20 deletions(-)

diff --git a/minetest.conf.example b/minetest.conf.example
index edf43e889..eb17ebc74 100644
--- a/minetest.conf.example
+++ b/minetest.conf.example
@@ -7,7 +7,9 @@
 # By default, all the settings are commented and not functional.
 # Uncomment settings by removing the preceding #.
 
+#
 # Client side stuff
+#
 
 #wanted_fps = 30
 #fps_max = 60
@@ -19,17 +21,28 @@
 #address = kray.dy.fi
 #name = 
 
+# Whether to try to fog out the border of the visible area
+#enable_fog = true
+# Enable a bit lower water surface; disable for speed
+#new_style_water = true
+# Enable nice leaves; disable for speed
+#new_style_leaves = true
+# Whether to draw a frametime graph
+#frametime_graph = false
+# Enable combining mainly used textures to a bigger one
+#enable_texture_atlas = true
+# Path to texture directory
+#texture_path =
+# Possible values: null, software, burningsvideo, direct3d8, direct3d9, opengl
+#video_driver = opengl
+
+# 
 #random_input = false
 #client_delete_unused_sectors_timeout = 1200
 
-#enable_fog = true
-#new_style_water = true
-#new_style_leaves = true
-#frametime_graph = false
-#enable_texture_atlas = true
-#texture_path =
-
+#
 # Server side stuff
+#
 
 #map-dir = /home/palle/custom_map
 
diff --git a/src/defaultsettings.cpp b/src/defaultsettings.cpp
index 72f63d9fb..a456a4fce 100644
--- a/src/defaultsettings.cpp
+++ b/src/defaultsettings.cpp
@@ -44,6 +44,7 @@ void set_default_settings()
 	g_settings.setDefault("frametime_graph", "false");
 	g_settings.setDefault("enable_texture_atlas", "true");
 	g_settings.setDefault("texture_path", "");
+	g_settings.setDefault("video_driver", "opengl");
 	
 	g_settings.setDefault("free_move", "false");
 	g_settings.setDefault("continuous_forward", "false");
diff --git a/src/main.cpp b/src/main.cpp
index 11ae9985c..2754c324b 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1723,30 +1723,41 @@ int main(int argc, char *argv[])
 	
 	std::string playername = g_settings.get("name");
 
-	/*
-		Resolution selection
-	*/
+	// Resolution selection
 	
 	bool fullscreen = false;
 	u16 screenW = g_settings.getU16("screenW");
 	u16 screenH = g_settings.getU16("screenH");
 
-	//
-
-	MyEventReceiver receiver;
+	// Determine driver
 
 	video::E_DRIVER_TYPE driverType;
+	
+	std::string driverstring = g_settings.get("video_driver");
 
-#ifdef _WIN32
-	//driverType = video::EDT_DIRECT3D9;
-	driverType = video::EDT_OPENGL;
-#else
-	driverType = video::EDT_OPENGL;
-	//driverType = video::EDT_BURNINGSVIDEO; // Best software renderer
-#endif
+	if(driverstring == "null")
+		driverType = video::EDT_NULL;
+	else if(driverstring == "software")
+		driverType = video::EDT_SOFTWARE;
+	else if(driverstring == "burningsvideo")
+		driverType = video::EDT_BURNINGSVIDEO;
+	else if(driverstring == "direct3d8")
+		driverType = video::EDT_DIRECT3D8;
+	else if(driverstring == "direct3d9")
+		driverType = video::EDT_DIRECT3D9;
+	else if(driverstring == "opengl")
+		driverType = video::EDT_OPENGL;
+	else
+	{
+		dstream<<"WARNING: Invalid video_driver specified; defaulting "
+				"to opengl"<<std::endl;
+		driverType = video::EDT_OPENGL;
+	}
 
 	// create device and exit if creation failed
 
+	MyEventReceiver receiver;
+
 	IrrlichtDevice *device;
 	device = createDevice(driverType,
 			core::dimension2d<u32>(screenW, screenH),