Initial commit

src/main/java/be/seeseemelk/diceos/Bootloader.java

@@ -0,0 +1,20 @@
+package be.seeseemelk.diceos;
+
+import com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application;
+import com.badlogic.gdx.backends.lwjgl3.Lwjgl3ApplicationConfiguration;
+import com.badlogic.gdx.graphics.glutils.HdpiMode;
+import io.avaje.inject.BeanScope;
+
+public class Bootloader {
+    public static void main(String[] args) {
+        try (var beanScope = BeanScope.builder().build()) {
+            var config = new Lwjgl3ApplicationConfiguration();
+            config.setTitle("DiceOS");
+            config.setWindowedMode(640+12, 360);
+//            config.setFullscreenMode(Lwjgl3ApplicationConfiguration.getDisplayMode());
+            //config.setResizable(false);
+            config.setHdpiMode(HdpiMode.Pixels);
+            new Lwjgl3Application(beanScope.get(DiceOS.class), config);
+        }
+    }
+}

src/main/java/be/seeseemelk/diceos/DiceOS.java

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+package be.seeseemelk.diceos;
+
+import be.seeseemelk.diceos.system.DisplayService;
+import be.seeseemelk.diceos.system.OnStartup;
+import com.badlogic.gdx.ApplicationAdapter;
+import com.badlogic.gdx.graphics.Color;
+import com.badlogic.gdx.graphics.Texture;
+import com.badlogic.gdx.utils.ScreenUtils;
+import com.badlogic.gdx.utils.viewport.FillViewport;
+import com.badlogic.gdx.utils.viewport.Viewport;
+import io.avaje.inject.Component;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+import java.util.List;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class DiceOS extends ApplicationAdapter {
+    private final DisplayService display;
+    private final List<OnStartup> startupTasks;
+    private Texture background;
+    private Texture border;
+    private Viewport viewport;
+
+    @Override
+    public void create() {
+        log.info("DiceOS starting...");
+        background = new Texture("src/main/resources/background.png");
+        border = new Texture("src/main/resources/border.png");
+        viewport = new FillViewport(2, 2);
+
+        for (var task : startupTasks) {
+            task.onStartup();
+        }
+
+        log.info("DiceOS started!");
+    }
+
+    @Override
+    public void render() {
+        display.getScreenBuffer().begin();
+        viewport.apply();
+        display.getBatch().setProjectionMatrix(viewport.getCamera().combined);
+        display.getBatch().begin();
+
+        ScreenUtils.clear(Color.GREEN);
+
+        for (int y = 0; y < display.getHeight(); y += 8) {
+            for (int x = 0; x < display.getWidth(); x += 8) {
+                display.draw(background, x, y);
+            }
+        }
+
+        var param = new DisplayService.Parameters();
+        display.draw(border, 0, 0, param);
+        param.flipX = true;
+        display.draw(border, display.getWidth() - 8, 0, param);
+        param.flipY = true;
+        display.draw(border, display.getWidth() - 8, display.getHeight() - 8, param);
+        param.flipX = false;
+        display.draw(border, 0, display.getHeight() - 8, param);
+
+        display.getBatch().end();
+        display.getScreenBuffer().end();
+
+        display.getBatch().begin();
+        display.getBatch().draw(display.getScreenBuffer().getColorBufferTexture(),
+                0, 0);
+        display.getBatch().end();
+    }
+}

src/main/java/be/seeseemelk/diceos/system/DisplayService.java

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+package be.seeseemelk.diceos.system;
+
+import com.badlogic.gdx.graphics.Pixmap;
+import com.badlogic.gdx.graphics.Texture;
+import com.badlogic.gdx.graphics.g2d.SpriteBatch;
+import com.badlogic.gdx.graphics.glutils.FrameBuffer;
+import io.avaje.inject.Component;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+@RequiredArgsConstructor
+@Component
+public class DisplayService implements OnStartup {
+    @Getter
+    private FrameBuffer screenBuffer;
+    @Getter
+    private SpriteBatch batch;
+//    private final GraphicsFactory graphicsFactory;
+
+    @Override
+    public void onStartup() {
+        screenBuffer = new FrameBuffer(Pixmap.Format.RGBA8888, getWidth(), getHeight(), false);
+        batch = new SpriteBatch();
+    }
+
+    public int getWidth() {
+        return 640;
+    }
+
+    public int getHeight() {
+        return 360;
+    }
+
+    public void draw(Texture texture, int x, int y) {
+        draw(texture, x, y, Parameters.DEFAULT);
+    }
+
+    public void draw(Texture texture, int x, int y, Parameters params) {
+        batch.draw(texture,
+                x, getHeight() - y - texture.getHeight(), texture.getWidth(), texture.getHeight(),
+                0, 0, texture.getWidth(), texture.getHeight(),
+                params.flipX, params.flipY);
+    }
+
+    public static class Parameters {
+        public final static Parameters DEFAULT = new Parameters();
+
+        public boolean flipX;
+        public boolean flipY;
+    }
+}

src/main/java/be/seeseemelk/diceos/system/OnStartup.java

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+package be.seeseemelk.diceos.system;
+
+/**
+ * Interface for components that need to perform actions on system startup.
+ */
+public interface OnStartup {
+    void onStartup();
+}

src/main/java/be/seeseemelk/diceos/system/gfx/Graphics.java

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+package be.seeseemelk.diceos.system.gfx;
+
+import io.avaje.inject.AssistFactory;
+import lombok.RequiredArgsConstructor;
+
+/**
+ * Graphics context and rendering utilities.
+ */
+@RequiredArgsConstructor
+@AssistFactory(GraphicsFactory.class)
+public class Graphics {
+//    private final
+//
+//    public void begin() {
+//
+//    }
+}

src/main/java/be/seeseemelk/diceos/system/gfx/GraphicsFactory.java

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+package be.seeseemelk.diceos.system.gfx;
+
+public interface GraphicsFactory {
+    Graphics create();
+}

src/main/java/be/seeseemelk/diceos/system/math/RandomService.java

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+package be.seeseemelk.diceos.system.math;
+
+import io.avaje.inject.Component;
+
+@Component
+public class RandomService {
+}

src/main/java/be/seeseemelk/diceos/system/math/ZanzlanzFootballFormula.java

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+package be.seeseemelk.diceos.system.math;
+
+/**
+ * Implementation of the Zanzlanz's Football Formula.
+ * @see https://www.youtube.com/watch?v=XDsYPXRCXAs
+ */
+public class ZanzlanzFootballFormula {
+    private int state = 1;
+
+    /**
+     * Generates the next pseudo-random number using Zanzlanz's Football Formula.
+     *
+     * @return the next pseudo-random number
+     */
+    public void nextIteration() {
+        state = (state * 25 + 102803) % 236196;
+    }
+}