raylib: refactor to implement new App class (#34375)

refactor to implement new App class

system/ui/raylib/spinner.cc

@@ -12,7 +12,7 @@ constexpr int kTextureSize = 360;
 constexpr int kFontSize = 80;
 
 int main(int argc, char *argv[]) {
-  initApp("spinner", 30);
+  App app("spinner", 30);
 
   // Turn off input buffering for std::cin
   std::cin.sync_with_stdio(false);
@@ -55,14 +55,12 @@ int main(int argc, char *argv[]) {
         bar.width *= progress / 100.0f;
         DrawRectangleRounded(bar, 0.5f, 10, RAYLIB_RAYWHITE);
       } else {
-        Vector2 textSize = MeasureTextEx(getFont(), userInput.c_str(), kFontSize, 1.0);
-        DrawTextEx(getFont(), userInput.c_str(), {center.x - textSize.x / 2, yPos}, kFontSize, 1.0, RAYLIB_WHITE);
+        Vector2 textSize = MeasureTextEx(app.getFont(), userInput.c_str(), kFontSize, 1.0);
+        DrawTextEx(app.getFont(), userInput.c_str(), {center.x - textSize.x / 2, yPos}, kFontSize, 1.0, RAYLIB_WHITE);
       }
     }
 
     EndDrawing();
   }
-
-  CloseWindow();
   return 0;
 }

system/ui/raylib/util.cc

@@ -1,6 +1,7 @@
 #include "system/ui/raylib/util.h"
 
 #include <array>
+#include <filesystem>
 
 #undef GREEN
 #undef RED
@@ -9,35 +10,16 @@
 #include "system/hardware/hw.h"
 
 constexpr std::array<const char *, static_cast<int>(FontWeight::Count)> FONT_FILE_PATHS = {
-    "../../assets/fonts/Inter-Black.ttf",
-    "../../assets/fonts/Inter-Bold.ttf",
-    "../../assets/fonts/Inter-ExtraBold.ttf",
-    "../../assets/fonts/Inter-ExtraLight.ttf",
-    "../../assets/fonts/Inter-Medium.ttf",
-    "../../assets/fonts/Inter-Regular.ttf",
-    "../../assets/fonts/Inter-SemiBold.ttf",
-    "../../assets/fonts/Inter-Thin.ttf",
+    "../../selfdrive/assets/fonts/Inter-Black.ttf",
+    "../../selfdrive/assets/fonts/Inter-Bold.ttf",
+    "../../selfdrive/assets/fonts/Inter-ExtraBold.ttf",
+    "../../selfdrive/assets/fonts/Inter-ExtraLight.ttf",
+    "../../selfdrive/assets/fonts/Inter-Medium.ttf",
+    "../../selfdrive/assets/fonts/Inter-Regular.ttf",
+    "../../selfdrive/assets/fonts/Inter-SemiBold.ttf",
+    "../../selfdrive/assets/fonts/Inter-Thin.ttf",
 };
 
-struct FontManager {
-  FontManager() {
-    for (int i = 0; i < fonts.size(); ++i) {
-      fonts[i] = LoadFontEx(FONT_FILE_PATHS[i], 120, nullptr, 250);
-    }
-  }
-
-  ~FontManager() {
-    for (auto &f : fonts) UnloadFont(f);
-  }
-
-  std::array<Font, static_cast<int>(FontWeight::Count)> fonts;
-};
-
-const Font& getFont(FontWeight weight) {
-  static FontManager font_manager;
-  return font_manager.fonts[(int)weight];
-}
-
 Texture2D LoadTextureResized(const char *fileName, int size) {
   Image img = LoadImage(fileName);
   ImageResize(&img, size, size);
@@ -45,10 +27,39 @@ Texture2D LoadTextureResized(const char *fileName, int size) {
   return texture;
 }
 
-void initApp(const char *title, int fps) {
+App *pApp = nullptr;
+
+App::App(const char *title, int fps) {
+  // Ensure the current dir matches the exectuable's directory
+  auto self_path = util::readlink("/proc/self/exe");
+  auto exe_dir = std::filesystem::path(self_path).parent_path();
+  chdir(exe_dir.c_str());
+
   Hardware::set_display_power(true);
   Hardware::set_brightness(65);
+
   // SetTraceLogLevel(LOG_NONE);
-  InitWindow(2160, 1080, title);
+  InitWindow(0, 0, title);
   SetTargetFPS(fps);
+
+  // Load fonts
+  fonts_.reserve(FONT_FILE_PATHS.size());
+  for (int i = 0; i < FONT_FILE_PATHS.size(); ++i) {
+    fonts_.push_back(LoadFontEx(FONT_FILE_PATHS[i], 120, nullptr, 250));
+  }
+
+  pApp = this;
+}
+
+App::~App() {
+  for (auto &font : fonts_) {
+    UnloadFont(font);
+  }
+
+  CloseWindow();
+  pApp = nullptr;
+}
+
+const Font &App::getFont(FontWeight weight) const {
+  return fonts_[static_cast<int>(weight)];
 }

system/ui/raylib/util.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <string>
+#include <vector>
 
 #include "system/ui/raylib/raylib.h"
 
@@ -16,6 +17,17 @@ enum class FontWeight {
   Count // To represent the total number of fonts
 };
 
-void initApp(const char *title, int fps);
-const Font& getFont(FontWeight weight = FontWeight::Normal);
 Texture2D LoadTextureResized(const char *fileName, int size);
+
+class App {
+public:
+  App(const char *title, int fps);
+  ~App();
+  const Font &getFont(FontWeight weight = FontWeight::Normal) const;
+
+protected:
+  std::vector<Font> fonts_;
+};
+
+// Global pointer to the App instance
+extern App *pApp;