Stretched Fixed Mode Plugin: Add Integer Scaling option (#2863)

Forces integer scale factor by rounding stretched dimensions towards zero.

runelite-mixins/src/main/java/net/runelite/mixins/StretchedFixedModeMixin.java

@@ -40,6 +40,9 @@ public abstract class StretchedFixedModeMixin implements RSClient
 	@Inject
 	private static boolean stretchedFast;
 
+	@Inject
+	private static boolean stretchedIntegerScaling;
+
 	@Inject
 	private static boolean stretchedKeepAspectRatio;
 
@@ -77,6 +80,14 @@ public abstract class StretchedFixedModeMixin implements RSClient
 		stretchedFast = state;
 	}
 
+	@Inject
+	@Override
+	public void setStretchedIntegerScaling(boolean state)
+	{
+		stretchedIntegerScaling = state;
+		cachedStretchedDimensions = null;
+	}
+
 	@Inject
 	@Override
 	public void setStretchedKeepAspectRatio(boolean state)
@@ -122,6 +133,18 @@ public abstract class StretchedFixedModeMixin implements RSClient
 				}
 			}
 
+			if (stretchedIntegerScaling)
+			{
+				if (width > Constants.GAME_FIXED_WIDTH)
+				{
+					width = width - (width % Constants.GAME_FIXED_WIDTH);
+				}
+				if (height > Constants.GAME_FIXED_HEIGHT)
+				{
+					height = height - (height % Constants.GAME_FIXED_HEIGHT);
+				}
+			}
+
 			cachedStretchedDimensions = new Dimension(width, height);
 			lastCanvasDimensions = new Dimension(width, height);
 		}