Add new overlay layer position

- Add new overlay layer position that draws right above overheads and HP
bars, what is perfect for game interfaces
- Make this new layer use UNDER_WIDGETS layer position, and move the
before layer position to ABOVE_SURFACE

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

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

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2018, Tomas Slusny <slusnucky@gmail.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.runelite.api;
+
+public interface TextureProvider
+{
+	void checkTextures(int var1);
+}

runelite-client/src/main/java/net/runelite/client/callback/Hooks.java

@@ -24,6 +24,7 @@
  */
 package net.runelite.client.callback;
 
+import net.runelite.api.TextureProvider;
 import net.runelite.api.events.GameTick;
 import net.runelite.api.events.ProjectileMoved;
 import net.runelite.api.events.MenuEntryAdded;
@@ -127,6 +128,22 @@ public class Hooks
 		BufferedImage image = (BufferedImage) bufferProvider.getImage();
 		Graphics2D graphics2d = (Graphics2D) image.getGraphics();
 
+		try
+		{
+			renderer.render(graphics2d, OverlayLayer.ABOVE_SCENE);
+		}
+		catch (Exception ex)
+		{
+			log.warn("Error during overlay rendering", ex);
+		}
+	}
+
+	public static void drawAboveOverheads(TextureProvider textureProvider, int var1)
+	{
+		MainBufferProvider bufferProvider = (MainBufferProvider) client.getBufferProvider();
+		BufferedImage image = (BufferedImage) bufferProvider.getImage();
+		Graphics2D graphics2d = (Graphics2D) image.getGraphics();
+
 		try
 		{
 			renderer.render(graphics2d, OverlayLayer.UNDER_WIDGETS);

runelite-client/src/main/java/net/runelite/client/ui/overlay/OverlayLayer.java

@@ -27,17 +27,22 @@ package net.runelite.client.ui.overlay;
 public enum OverlayLayer
 {
 	/**
-	 * Render overlay above all game elements
+	 * Render right above the scene (that contains actors and the surface)
 	 */
-	ALWAYS_ON_TOP,
+	ABOVE_SCENE,
 
 	/**
-	 * Render under all interfaces
+	 * Render under all interfaces, but above overheads
 	 */
 	UNDER_WIDGETS,
 
 	/**
 	 * Render under the right-click menu
 	 */
-	ABOVE_WIDGETS
+	ABOVE_WIDGETS,
+
+	/**
+	 * Render overlay above all game elements
+	 */
+	ALWAYS_ON_TOP,
 }

runescape-api/src/main/java/net/runelite/rs/api/RSTextureProvider.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2018, Tomas Slusny <slusnucky@gmail.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.runelite.rs.api;
+
+import net.runelite.api.TextureProvider;
+import net.runelite.mapping.Import;
+
+public interface RSTextureProvider extends TextureProvider
+{
+	@Override
+	@Import("checkTextures")
+	void checkTextures(int var1);
+}