macOS load system fonts objective-c++

src/app/core/platform/font_loader.h

@@ -0,0 +1,8 @@
+// FontLoader.h
+#ifndef FONTLOADER_H
+#define FONTLOADER_H
+
+// Function declaration for loading system fonts into ImGui
+void LoadSystemFonts();
+
+#endif // FONTLOADER_H

src/app/core/platform/font_loader.mm

@@ -0,0 +1,39 @@
+// FontLoader.mm
+#include "app/core/platform/font_loader.h"
+#import <Cocoa/Cocoa.h>
+#import <CoreText/CoreText.h>
+#include <imgui/imgui.h>
+
+void LoadSystemFonts() {
+  // List of common macOS system fonts
+  NSArray *fontNames = @[ @"Helvetica", @"Times New Roman", @"Courier", @"Arial", @"Verdana" ];
+
+  for (NSString *fontName in fontNames) {
+    NSFont *font = [NSFont fontWithName:fontName size:14.0];
+    if (!font) {
+      NSLog(@"Font not found: %@", fontName);
+      continue;
+    }
+
+    CTFontDescriptorRef fontDescriptor =
+        CTFontDescriptorCreateWithNameAndSize((CFStringRef)font.fontName, font.pointSize);
+    CFURLRef fontURL = (CFURLRef)CTFontDescriptorCopyAttribute(fontDescriptor, kCTFontURLAttribute);
+    NSString *fontPath = [(NSURL *)fontURL path];
+    CFRelease(fontDescriptor);
+
+    if (fontPath != nil && [[NSFileManager defaultManager] isReadableFileAtPath:fontPath]) {
+      // Load the font into ImGui
+      ImGuiIO &io = ImGui::GetIO();
+      ImFont *imFont = io.Fonts->AddFontFromFileTTF([fontPath UTF8String], 14.0f);
+      if (!imFont) {
+        NSLog(@"Failed to load font: %@", fontPath);
+      }
+    } else {
+      NSLog(@"Font file not accessible: %@", fontPath);
+    }
+
+    if (fontURL) {
+      CFRelease(fontURL);
+    }
+  }
+}