FPS Label Implemented

src/dawn/display/font/BitmapFont.cpp

@@ -44,7 +44,10 @@ void BitmapFont::buffer(
   size_t j = 0;
   size_t wordStart = 0;
   glm::vec2 xy0(0, 0);
-  glm::vec2 tileSize = glm::vec2(tileset->getTileWidth(), tileset->getTileHeight());
+  glm::vec2 tileSize =
+    glm::vec2(tileset->getTileWidth(), tileset->getTileHeight()) *
+    (fontSize / this->getDefaultFontSize())
+  ;
 
   // Buffer quads
   while(c = text[i++]) {
@@ -139,9 +142,9 @@ void BitmapFont::draw(Mesh *mesh, int32_t start, int32_t len) {
 }
 
 float_t BitmapFont::getLineHeight(float_t fontSize) {
-  return 16.0f;
+  return tileset->getTileHeight();
 }
 
 float_t BitmapFont::getDefaultFontSize() {
-  return 16.0f;
+  return tileset->getTileHeight();
 }

src/dawn/prefabs/FPSLabel.hpp

@@ -0,0 +1,32 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "prefab/SceneItemPrefab.hpp"
+#include "scene/components/ui/UILabel.hpp"
+
+namespace Dawn {
+  class FPSLabel : public SceneItemPrefab<FPSLabel>, public StateOwner {
+    public:
+      static std::vector<Asset*> prefabAssets(AssetManager *man) {
+        return {};
+      }
+
+      UILabel *label;
+
+      FPSLabel(Scene *s, sceneitemid_t i) : SceneItemPrefab(s, i) {}
+
+      void prefabInit(AssetManager *man) override {
+        label = this->addComponent<UILabel>();
+        label->text = "No Frame";
+
+        useEvent([&](float_t delta){
+          std::string strFps = std::to_string((int32_t)(1.0f / delta));
+          std::string strTick = std::to_string((int32_t)(delta * 1000.0f));
+          label->text = strFps + "FPS (" + strTick + "ms)";
+        }, scene->eventSceneUnpausedUpdate);
+      }
+  };
+}