irr: Add texture override support

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@13466 178a84e3-b1eb-0310-8ba1-8eac791a3b58

lib/irrlicht/changes.stk

@@ -8,3 +8,4 @@ The following changes have been made:
 - partial backport to expose setCurrentRendertime in the scene mgr
 - a workaround for every other RTTs flipping
 - aabbox intersection support
+- texture override

lib/irrlicht/include/EMaterialFlags.h

@@ -87,7 +87,16 @@ namespace video
 		EMF_POLYGON_OFFSET = 0x80000,
 
 		//! MaterialType override
-		EMF_MATERIAL_TYPE = 0x100000
+		EMF_MATERIAL_TYPE = 0x100000,
+
+		//! Texture
+		EMF_TEXTURE0 = 0x200000,
+
+		//! Texture
+		EMF_TEXTURE1 = 0x400000,
+
+		//! Texture
+		EMF_TEXTURE2 = 0x800000,
 	};
 
 } // end namespace video

lib/irrlicht/include/IVideoDriver.h

@@ -201,6 +201,12 @@ namespace video
 						case EMF_POLYGON_OFFSET:
 							material.PolygonOffsetDirection = Material.PolygonOffsetDirection;
 							material.PolygonOffsetFactor = Material.PolygonOffsetFactor; break;
+						case EMF_TEXTURE0:
+							material.TextureLayer[0] = Material.TextureLayer[0]; break;
+						case EMF_TEXTURE1:
+							material.TextureLayer[1] = Material.TextureLayer[1]; break;
+						case EMF_TEXTURE2:
+							material.TextureLayer[2] = Material.TextureLayer[2]; break;
 						}
 					}
 				}