Introduce off heap garbage collector

engine/src/main/java/com/bartlomiejpluta/base/core/engine/DefaultGameEngine.java

@@ -1,5 +1,6 @@
 package com.bartlomiejpluta.base.core.engine;
 
+import com.bartlomiejpluta.base.core.gc.OffHeapGarbageCollector;
 import com.bartlomiejpluta.base.core.logic.GameLogic;
 import com.bartlomiejpluta.base.core.thread.ThreadManager;
 import com.bartlomiejpluta.base.core.time.ChronoMeter;
@@ -18,6 +19,7 @@ public class DefaultGameEngine implements GameEngine {
    private final WindowManager windowManager;
    private final ThreadManager threadManager;
    private final GameLogic logic;
+   private final OffHeapGarbageCollector garbageCollector;
 
    private final Thread thread;
    private final Window window;
@@ -30,6 +32,7 @@ public class DefaultGameEngine implements GameEngine {
    public DefaultGameEngine(WindowManager windowManager,
                             ThreadManager threadManager,
                             GameLogic logic,
+                            OffHeapGarbageCollector garbageCollector,
                             @Value("${app.window.title}") String title,
                             @Value("${app.window.width}") int width,
                             @Value("${app.window.height}") int height,
@@ -37,6 +40,7 @@ public class DefaultGameEngine implements GameEngine {
       this.windowManager = windowManager;
       this.threadManager = threadManager;
       this.logic = logic;
+      this.garbageCollector = garbageCollector;
 
       this.window = windowManager.createWindow(title, width, height);
       this.thread = threadManager.createThread(THREAD_NAME, this::run);
@@ -96,7 +100,8 @@ public class DefaultGameEngine implements GameEngine {
    }
 
    private void cleanUp() {
-      logic.cleanUp();
+      log.info("Performing off heap garbage collection");
+      garbageCollector.cleanUp();
    }
 
    @Override

engine/src/main/java/com/bartlomiejpluta/base/core/gc/Cleanable.java

@@ -0,0 +1,5 @@
+package com.bartlomiejpluta.base.core.gc;
+
+public interface Cleanable {
+   void cleanUp();
+}

engine/src/main/java/com/bartlomiejpluta/base/core/gc/DefaultOffHeapGarbageCollector.java

@@ -0,0 +1,22 @@
+package com.bartlomiejpluta.base.core.gc;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import java.util.List;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor(onConstructor = @__(@Autowired))
+public class DefaultOffHeapGarbageCollector implements OffHeapGarbageCollector {
+   private final List<Cleanable> cleanables;
+
+   @Override
+   public void cleanUp() {
+      cleanables.stream()
+              .peek(cleanable -> log.info("Performing {} cleaning", cleanable.getClass().getSimpleName()))
+              .forEach(Cleanable::cleanUp);
+   }
+}

engine/src/main/java/com/bartlomiejpluta/base/core/gc/Disposable.java

@@ -0,0 +1,5 @@
+package com.bartlomiejpluta.base.core.gc;
+
+public interface Disposable {
+   void dispose();
+}

engine/src/main/java/com/bartlomiejpluta/base/core/gc/OffHeapGarbageCollector.java

@@ -0,0 +1,5 @@
+package com.bartlomiejpluta.base.core.gc;
+
+public interface OffHeapGarbageCollector {
+   void cleanUp();
+}

engine/src/main/java/com/bartlomiejpluta/base/core/gl/object/mesh/Mesh.java

@@ -1,5 +1,6 @@
 package com.bartlomiejpluta.base.core.gl.object.mesh;
 
+import com.bartlomiejpluta.base.core.gc.Disposable;
 import com.bartlomiejpluta.base.core.gl.render.Renderable;
 import com.bartlomiejpluta.base.core.gl.shader.manager.ShaderManager;
 import com.bartlomiejpluta.base.core.ui.Window;
@@ -13,7 +14,7 @@ import static org.lwjgl.opengl.GL15.*;
 import static org.lwjgl.opengl.GL20.*;
 import static org.lwjgl.opengl.GL30.*;
 
-public class Mesh implements Renderable {
+public class Mesh implements Renderable, Disposable {
    private final int vaoId;
    private final List<Integer> vboIds = new ArrayList<>(2);
    private final int elementsCount;
@@ -65,7 +66,7 @@ public class Mesh implements Renderable {
    }
 
    @Override
-   public void cleanUp() {
+   public void dispose() {
       glDisableVertexAttribArray(0);
       glBindBuffer(GL_ARRAY_BUFFER, 0);
       glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);

engine/src/main/java/com/bartlomiejpluta/base/core/gl/object/texture/DefaultTextureManager.java

@@ -29,4 +29,11 @@ public class DefaultTextureManager implements TextureManager {
 
       return texture;
    }
+
+   @Override
+   public void cleanUp() {
+      log.info("Disposing textures");
+      loadedTextures.forEach((name, texture) -> texture.dispose());
+      log.info("{} textures has been disposed", loadedTextures.size());
+   }
 }

engine/src/main/java/com/bartlomiejpluta/base/core/gl/object/texture/Texture.java

@@ -1,6 +1,7 @@
 package com.bartlomiejpluta.base.core.gl.object.texture;
 
 import com.bartlomiejpluta.base.core.error.AppException;
+import com.bartlomiejpluta.base.core.gc.Disposable;
 import lombok.Getter;
 import org.lwjgl.system.MemoryStack;
 
@@ -12,7 +13,7 @@ import static org.lwjgl.opengl.GL13.glActiveTexture;
 import static org.lwjgl.stb.STBImage.stbi_failure_reason;
 import static org.lwjgl.stb.STBImage.stbi_load_from_memory;
 
-public class Texture {
+public class Texture implements Disposable {
    private static final int DESIRED_CHANNELS = 4;
 
    private final int textureId;
@@ -57,4 +58,9 @@ public class Texture {
       glActiveTexture(GL_TEXTURE0);
       glBindTexture(GL_TEXTURE_2D, textureId);
    }
+
+   @Override
+   public void dispose() {
+      glDeleteTextures(textureId);
+   }
 }

engine/src/main/java/com/bartlomiejpluta/base/core/gl/object/texture/TextureManager.java

@@ -1,5 +1,7 @@
 package com.bartlomiejpluta.base.core.gl.object.texture;
 
-public interface TextureManager {
+import com.bartlomiejpluta.base.core.gc.Cleanable;
+
+public interface TextureManager extends Cleanable {
    Texture loadTexture(String textureFileName);
 }

engine/src/main/java/com/bartlomiejpluta/base/core/gl/render/DefaultRenderer.java

@@ -57,6 +57,6 @@ public class DefaultRenderer implements Renderer {
 
    @Override
    public void cleanUp() {
-      shaderManager.cleanUp();
+      log.info("There is nothing to clean up here");
    }
 }

engine/src/main/java/com/bartlomiejpluta/base/core/gl/render/Renderable.java

@@ -5,5 +5,4 @@ import com.bartlomiejpluta.base.core.ui.Window;
 
 public interface Renderable {
    void render(Window window, ShaderManager shaderManager);
-   void cleanUp();
 }

engine/src/main/java/com/bartlomiejpluta/base/core/gl/render/Renderer.java

@@ -1,11 +1,9 @@
 package com.bartlomiejpluta.base.core.gl.render;
 
+import com.bartlomiejpluta.base.core.gc.Cleanable;
 import com.bartlomiejpluta.base.core.ui.Window;
 
-public interface Renderer {
+public interface Renderer extends Cleanable {
    void init();
-
    void render(Window window, Renderable renderable);
-
-   void cleanUp();
 }

engine/src/main/java/com/bartlomiejpluta/base/core/gl/shader/manager/DefaultShaderManager.java

@@ -142,7 +142,8 @@ public class DefaultShaderManager implements ShaderManager {
 
    @Override
    public void cleanUp() {
-      log.info("Cleaning up shaders");
+      log.info("Disposing shaders");
-      shaders.forEach((name, program) -> program.cleanUp());
+      shaders.forEach((name, program) -> program.dispose());
+      log.info("{} shaders has been disposed", shaders.size());
    }
 }

engine/src/main/java/com/bartlomiejpluta/base/core/gl/shader/manager/ShaderManager.java

@@ -1,9 +1,10 @@
 package com.bartlomiejpluta.base.core.gl.shader.manager;
 
+import com.bartlomiejpluta.base.core.gc.Cleanable;
 import com.bartlomiejpluta.base.core.gl.shader.uniform.Uniform;
 import org.joml.*;
 
-public interface ShaderManager {
+public interface ShaderManager extends Cleanable {
    ShaderManager createShader(String programName, String vertexShaderFilename, String fragmentShaderFilename);
 
    ShaderManager selectShader(String programName);
@@ -41,6 +42,4 @@ public interface ShaderManager {
    ShaderManager setUniform(String uniformName, int index, Uniform uniform);
 
    ShaderManager setUniforms(String uniformName, Uniform[] uniforms);
-
-   void cleanUp();
 }

engine/src/main/java/com/bartlomiejpluta/base/core/gl/shader/program/ShaderProgram.java

@@ -1,6 +1,7 @@
 package com.bartlomiejpluta.base.core.gl.shader.program;
 
 import com.bartlomiejpluta.base.core.error.AppException;
+import com.bartlomiejpluta.base.core.gc.Disposable;
 import com.bartlomiejpluta.base.core.gl.shader.uniform.Uniform;
 import lombok.extern.slf4j.Slf4j;
 import org.joml.*;
@@ -13,7 +14,7 @@ import static java.lang.String.format;
 import static org.lwjgl.opengl.GL20.*;
 
 @Slf4j
-public class ShaderProgram {
+public class ShaderProgram implements Disposable {
    private final int programId;
    private final int vertexShaderId;
    private final int fragmentShaderId;
@@ -159,7 +160,8 @@ public class ShaderProgram {
       glUseProgram(0);
    }
 
-   public void cleanUp() {
+   @Override
+   public void dispose() {
       glUseProgram(0);
 
       if(programId != 0) {

engine/src/main/java/com/bartlomiejpluta/base/core/logic/GameLogic.java

@@ -1,8 +1,9 @@
 package com.bartlomiejpluta.base.core.logic;
 
+import com.bartlomiejpluta.base.core.gc.Cleanable;
 import com.bartlomiejpluta.base.core.ui.Window;
 
-public interface GameLogic {
+public interface GameLogic extends Cleanable {
    void init(Window window);
 
    void input(Window window);
@@ -10,6 +11,4 @@ public interface GameLogic {
    void update(float dt);
 
    void render(Window window);
-
-   void cleanUp();
 }

engine/src/main/java/com/bartlomiejpluta/base/core/util/mesh/DefaultMeshManager.java

@@ -28,6 +28,13 @@ public class DefaultMeshManager implements MeshManager {
       return mesh;
    }
 
+   @Override
+   public void cleanUp() {
+      log.info("Disposing meshes");
+      quads.forEach((dim, mesh) -> mesh.dispose());
+      log.info("{} meshes has been disposed", quads.size());
+   }
+
    @Data
    private static class QuadDimension {
       private final Vector2f size;

engine/src/main/java/com/bartlomiejpluta/base/core/util/mesh/MeshManager.java

@@ -1,7 +1,8 @@
 package com.bartlomiejpluta.base.core.util.mesh;
 
+import com.bartlomiejpluta.base.core.gc.Cleanable;
 import com.bartlomiejpluta.base.core.gl.object.mesh.Mesh;
 
-public interface MeshManager {
+public interface MeshManager extends Cleanable {
    Mesh createQuad(float width, float height, float originX, float originY);
 }

engine/src/main/java/com/bartlomiejpluta/base/core/world/map/GameMap.java

@@ -5,14 +5,11 @@ import com.bartlomiejpluta.base.core.world.movement.Movement;
 import com.bartlomiejpluta.base.core.world.tileset.model.Tile;
 import com.bartlomiejpluta.base.core.world.tileset.model.TileSet;
 import lombok.Getter;
-import lombok.extern.slf4j.Slf4j;
 import org.joml.Vector2f;
 import org.joml.Vector2i;
 
 import java.util.Arrays;
-import java.util.Objects;
 
-@Slf4j
 public class GameMap {
    private static final int LAYERS = 4;
    private final TileSet tileSet;
@@ -92,8 +89,4 @@ public class GameMap {
 
       return isTargetReachable && canMoveFromCurrentTile;
    }
-
-   public void cleanUp() {
-      Arrays.stream(map).flatMap(Arrays::stream).filter(Objects::nonNull).forEach(Tile::cleanUp);
-   }
 }

engine/src/main/java/com/bartlomiejpluta/base/core/world/object/RenderableObject.java

@@ -25,11 +25,6 @@ public abstract class RenderableObject extends Object implements Renderable {
       mesh.render(window, shaderManager);
    }
 
-   @Override
-   public void cleanUp() {
-      mesh.cleanUp();
-   }
-
    public void setAlpha(float alpha) {
       material.setAlpha(alpha);
    }

engine/src/main/java/com/bartlomiejpluta/base/core/world/scene/Scene.java

@@ -7,8 +7,8 @@ import com.bartlomiejpluta.base.core.ui.Window;
 import com.bartlomiejpluta.base.core.world.animation.AnimationableObject;
 import com.bartlomiejpluta.base.core.world.animation.Animator;
 import com.bartlomiejpluta.base.core.world.camera.Camera;
-import com.bartlomiejpluta.base.core.world.object.RenderableObject;
 import com.bartlomiejpluta.base.core.world.map.GameMap;
+import com.bartlomiejpluta.base.core.world.object.RenderableObject;
 import lombok.AllArgsConstructor;
 import lombok.Setter;
 
@@ -71,9 +71,4 @@ public class Scene implements Renderable {
 
       object.render(window, shaderManager);
    }
-
-   @Override
-   public void cleanUp() {
-      map.cleanUp();
-   }
 }

engine/src/main/java/com/bartlomiejpluta/base/core/world/tileset/manager/DefaultTileSetManager.java

@@ -34,4 +34,9 @@ public class DefaultTileSetManager implements TileSetManager {
 
       return tileset;
    }
+
+   @Override
+   public void cleanUp() {
+      log.info("There is nothing to clean up here");
+   }
 }

engine/src/main/java/com/bartlomiejpluta/base/core/world/tileset/manager/TileSetManager.java

@@ -1,7 +1,8 @@
 package com.bartlomiejpluta.base.core.world.tileset.manager;
 
+import com.bartlomiejpluta.base.core.gc.Cleanable;
 import com.bartlomiejpluta.base.core.world.tileset.model.TileSet;
 
-public interface TileSetManager {
+public interface TileSetManager extends Cleanable {
    TileSet createTileSet(String tileSetFileName, int rows, int columns);
 }

game/src/main/java/com/bartlomiejpluta/base/game/world/entity/manager/DefaultEntityManager.java

@@ -6,10 +6,12 @@ import com.bartlomiejpluta.base.core.util.mesh.MeshManager;
 import com.bartlomiejpluta.base.game.world.entity.model.Entity;
 import com.bartlomiejpluta.base.game.world.entity.config.EntitySpriteConfiguration;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.joml.Vector2f;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 
+@Slf4j
 @Component
 @RequiredArgsConstructor(onConstructor = @__(@Autowired))
 public class DefaultEntityManager implements EntityManager {
@@ -28,4 +30,9 @@ public class DefaultEntityManager implements EntityManager {
       var spriteHeight = texture.getHeight() / (float) dimension.x;
       return meshManager.createQuad(spriteWidth, spriteHeight, spriteWidth / 2, spriteHeight*0.9f);
    }
+
+   @Override
+   public void cleanUp() {
+      log.info("There is nothing to clean up");
+   }
 }

game/src/main/java/com/bartlomiejpluta/base/game/world/entity/manager/EntityManager.java

@@ -1,9 +1,10 @@
 package com.bartlomiejpluta.base.game.world.entity.manager;
 
+import com.bartlomiejpluta.base.core.gc.Cleanable;
 import com.bartlomiejpluta.base.core.gl.object.material.Material;
 import com.bartlomiejpluta.base.game.world.entity.model.Entity;
 import org.joml.Vector2f;
 
-public interface EntityManager {
+public interface EntityManager extends Cleanable {
    Entity createEntity(Material material, Vector2f coordinateStepSize);
 }