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

Forces integer scale factor by rounding stretched dimensions towards zero.

runelite-api/src/main/java/net/runelite/api/Client.java

@@ -329,6 +329,8 @@ public interface Client extends GameEngine
 
 	void setStretchedFast(boolean state);
 
+	void setStretchedIntegerScaling(boolean state);
+
 	void setStretchedKeepAspectRatio(boolean state);
 
 	Dimension getStretchedDimensions();

runelite-client/src/main/java/net/runelite/client/plugins/stretchedfixedmode/StretchedFixedModeConfig.java

@@ -55,4 +55,14 @@ public interface StretchedFixedModeConfig extends Config
 	{
 		return false;
 	}
+
+	@ConfigItem(
+		keyName = "integerScaling",
+		name = "Integer Scaling",
+		description = "Forces use of a whole number scale factor"
+	)
+	default boolean integerScaling()
+	{
+		return false;
+	}
 }

runelite-client/src/main/java/net/runelite/client/plugins/stretchedfixedmode/StretchedFixedModePlugin.java

@@ -94,6 +94,7 @@ public class StretchedFixedModePlugin extends Plugin
 
 	private void updateConfig()
 	{
+		client.setStretchedIntegerScaling(config.integerScaling());
 		client.setStretchedKeepAspectRatio(config.keepAspectRatio());
 		client.setStretchedFast(config.increasedPerformance());
 	}

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);
 		}