Put wallpaper through linear workflow.

Without this wallpapers could turn up
with wrong gamma applied.

#RH-34959 Needs Testing
#RH-34959 Assigned to: brianjames
#RH-34959 add Worked on By nathan

Converters/BitmapConverter.cs

@@ -253,7 +253,7 @@ public static void EnvironmentBitmapFromEvaluator(RenderEnvironment rm, CyclesTe
 			}
 		}
 
-		public static byte[] ReadByteBitmapFromBitmap(int pwidth, int pheight, Bitmap bm)
+		public static ByteBitmap ReadByteBitmapFromBitmap(uint id, int pwidth, int pheight, Bitmap bm)
 		{
 			var upixel = new byte[pwidth * pheight * 4];
 
@@ -269,7 +269,7 @@ public static byte[] ReadByteBitmapFromBitmap(int pwidth, int pheight, Bitmap bm
 					upixel[offset + 3] = px.A;
 				}
 			}
-			return upixel;
+			return new ByteBitmap(id, upixel, pwidth, pheight);
 		}
 
 		private static byte[] ReadByteBitmapFromEvaluator(int pwidth, int pheight, TextureEvaluator textureEvaluator, bool isEnvironment, bool planarProjection)

CyclesBackground.cs

@@ -158,9 +158,8 @@ public void HandleWallpaper(ViewInfo view, bool scaleToFit)
 				wallpaper.Clear();
 				return;
 			}
-
 			m_old_wallpaper = view.WallpaperFilename != null ? view.WallpaperFilename : "";
-
+			var crc = Rhino.RhinoMath.CRC32(27, System.Text.Encoding.UTF8.GetBytes(m_old_wallpaper));
 			try
 			{
 				int near, far;
@@ -238,7 +237,10 @@ public void HandleWallpaper(ViewInfo view, bool scaleToFit)
 				var tmpf = string.Format("{0}\\{1}.png", Environment.GetEnvironmentVariable("TEMP"), "RC_wallpaper");
 				newBitmap.Save(tmpf, ImageFormat.Png);
 #endif
-				wallpaper.TexByte = BitmapConverter.ReadByteBitmapFromBitmap(newBitmap.Size.Width, newBitmap.Size.Height, newBitmap);
+				var wallpaperbm = BitmapConverter.ReadByteBitmapFromBitmap(crc, newBitmap.Size.Width, newBitmap.Size.Height, newBitmap);
+				wallpaperbm.ApplyGamma(gamma);
+				wallpaper.TexByte = wallpaperbm.corrected;
+				wallpaperbm.SaveBitmaps();
 				wallpaper.TexWidth = newBitmap.Width;
 				wallpaper.TexHeight = newBitmap.Height;
 				wallpaper.Name = string.Format("{0}_{1}x{2}_{3}_{4}_{5}_{6}",