Create FPSMonitor component with FPS graph

api/src/main/java/com/bartlomiejpluta/base/lib/gui/FPSMonitor.java

@@ -0,0 +1,88 @@
+package com.bartlomiejpluta.base.lib.gui;
+
+import com.bartlomiejpluta.base.api.context.Context;
+import com.bartlomiejpluta.base.api.gui.Attribute;
+import com.bartlomiejpluta.base.api.gui.Color;
+import com.bartlomiejpluta.base.api.gui.Component;
+import com.bartlomiejpluta.base.api.gui.GUI;
+import com.bartlomiejpluta.base.api.screen.Screen;
+import com.bartlomiejpluta.base.util.profiler.FPSProfiler;
+
+import java.util.Map;
+
+public class FPSMonitor extends BaseComponent {
+   private final Color color;
+   private final Color background;
+   private FPSProfiler fpsProfiler = FPSProfiler.create(5, 40);
+   private float lineWidth = 1f;
+
+   public FPSMonitor(Context context, GUI gui, Map<String, Component> refs) {
+      super(context, gui, refs);
+      color = gui.createColor();
+      background = gui.createColor();
+      color.setRGBA(0xFF0000FF);
+      background.setRGBA(0x444444AA);
+   }
+
+   @Attribute("monitor")
+   public void setMonitor(Integer[] options) {
+      if (options.length != 2) {
+         throw new IllegalArgumentException("Expected 2 parameters: batch size and number of samples");
+      }
+
+      this.fpsProfiler = FPSProfiler.create(options[0], options[1]);
+   }
+
+   public void setColor(Integer hex) {
+      color.setRGBA(hex);
+   }
+
+   public void setBackground(Integer hex) {
+      background.setRGBA(hex);
+   }
+
+   public void setLineWidth(Float width) {
+      this.lineWidth = width;
+   }
+
+   @Override
+   protected float getContentWidth() {
+      return width;
+   }
+
+   @Override
+   protected float getContentHeight() {
+      return height;
+   }
+
+   @Override
+   public void update(float dt) {
+      super.update(dt);
+      fpsProfiler.update(dt);
+   }
+
+   @Override
+   public void draw(Screen screen, GUI gui) {
+      var values = fpsProfiler.getSamples();
+      var actualHeight = height - paddingTop - paddingBottom;
+      var step = (width - paddingLeft - paddingRight) / values.size();
+
+      gui.beginPath();
+      gui.drawRectangle(x, y, width, height);
+      gui.setFillColor(background);
+      gui.fill();
+      gui.closePath();
+
+      gui.beginPath();
+      gui.moveTo(x + paddingLeft, (float) (actualHeight - values.get(0) / 60 * actualHeight + y + paddingTop));
+
+      for (int i = 1; i < values.size(); ++i) {
+         gui.drawLineTo(i * step + x + paddingLeft, (float) (actualHeight - values.get(i) / 60 * actualHeight + y + paddingTop));
+      }
+
+      gui.setStrokeColor(color);
+      gui.setStrokeWidth(lineWidth);
+      gui.stroke();
+      gui.closePath();
+   }
+}

api/src/main/java/com/bartlomiejpluta/base/util/collection/LimitedQueue.java

@@ -0,0 +1,21 @@
+package com.bartlomiejpluta.base.util.collection;
+
+import lombok.RequiredArgsConstructor;
+
+import java.util.LinkedList;
+
+@RequiredArgsConstructor
+public class LimitedQueue<E> extends LinkedList<E> {
+   private final int limit;
+
+   @Override
+   public boolean add(E o) {
+      super.add(o);
+
+      while (size() > limit) {
+         super.remove();
+      }
+
+      return true;
+   }
+}

api/src/main/java/com/bartlomiejpluta/base/util/profiler/FPSProfiler.java

@@ -1,29 +1,31 @@
 package com.bartlomiejpluta.base.util.profiler;
 
+import com.bartlomiejpluta.base.util.collection.LimitedQueue;
 import lombok.Getter;
 import lombok.extern.slf4j.Slf4j;
 
-import java.util.LinkedList;
 import java.util.List;
-import java.util.Map;
-
-import static java.util.Comparator.comparingInt;
-import static java.util.function.Function.identity;
-import static java.util.stream.Collectors.counting;
-import static java.util.stream.Collectors.groupingBy;
 
 @Slf4j
 public class FPSProfiler {
    private final int batchSize;
-   private final List<Double> values = new LinkedList<>();
+
+   @Getter
+   private final List<Double> samples;
    private float fpsAccumulator = 0;
    private int pointer = 0;
 
    @Getter
    private double instantFPS = 0;
 
-   private FPSProfiler(int batchSize) {
+   private FPSProfiler(int batchSize, int samples) {
       this.batchSize = batchSize;
+      this.samples = new LimitedQueue<>(samples);
+      this.samples.add(0.0);
+   }
+
+   public static FPSProfiler create(int batchSize, int samples) {
+      return new FPSProfiler(batchSize, samples);
    }
 
    public void update(float dt) {
@@ -34,37 +36,7 @@ public class FPSProfiler {
          fpsAccumulator = 0;
          pointer = 0;
 
-         values.add(instantFPS);
+         samples.add(instantFPS);
       }
    }
-
-   public void logResult() {
-      log.info("Min FPS: {}, max FPS: {}, avg FPS: {}",
-            values.stream().min(Double::compareTo).orElse(-1.0),
-            values.stream().max(Double::compareTo).orElse(-1.0),
-            totalAverage()
-      );
-
-      printHistogram();
-   }
-
-   private double totalAverage() {
-      return values.stream().reduce(0.0, Double::sum) / values.size();
-   }
-
-   private void printHistogram() {
-      values
-            .stream()
-            .mapToInt(Double::intValue)
-            .boxed()
-            .collect(groupingBy(identity(), counting()))
-            .entrySet()
-            .stream()
-            .sorted(comparingInt(Map.Entry::getKey))
-            .forEach(e -> log.info("{} FPS: {}% ({} occurrences)", e.getKey(), e.getValue() * 100.0f / values.size(), e.getValue()));
-   }
-
-   public static FPSProfiler create(int batchSize) {
-      return new FPSProfiler(batchSize);
-   }
 }