diff -r 9c44c55d327a -r 8297afa1c29c src/context.c
--- a/src/context.c	Thu Apr 18 22:53:55 2024 +0200
+++ b/src/context.c	Fri Apr 19 22:28:29 2024 +0200
@@ -42,14 +42,24 @@
     return 1000000000ull*(uint64_t)ts.tv_sec + (uint64_t)ts.tv_nsec;
 }
 
+// forward declare non-public font cache functions
+void asc_font_cache_init(void);
+void asc_font_cache_destroy(void);
+
 void asc_context_initialize(void) {
     if (asc_test_flag(asc_context.flags, ASC_FLAG_INITILIZED))
         return;
     memset(&asc_context, 0, sizeof(AscContext));
 
-    // nothing is active right after initialization
+    // initialize the font cache
+    asc_font_cache_init();
+
+    // set a default font, but do not load it
+    asc_context.active_font.style = ASC_FONT_REGULAR;
+    asc_context.active_font.size = 14;
+
+    // no window, yet
     asc_context.active_window = ASC_MAX_WINDOWS;
-    asc_context.active_font = ASC_MAX_FONTS;
 
     // initialize error buffer
     cxBufferInit(
@@ -75,10 +85,13 @@
 }
 
 void asc_context_destroy(void) {
+    // destroy windows
     for (unsigned int i = 0 ; i < ASC_MAX_WINDOWS ; i++) {
         asc_window_destroy(i);
     }
-    // TODO: fix that fonts are currently leaking by reworking the font cache
+
+    // destroy the font cache
+    asc_font_cache_destroy();
 
     // quit SDL
     if (TTF_WasInit())
@@ -95,6 +108,15 @@
     asc_set_flag(asc_context.flags, ASC_FLAG_QUIT);
 }
 
+AscWindow *asc_active_window_assert() {
+    if (asc_context.active_window < ASC_MAX_WINDOWS) {
+        return &asc_context.windows[asc_context.active_window];
+    } else {
+        asc_dprintf("Window access attempted without active window");
+        abort();
+    }
+}
+
 static void asc_event_window_resized(Uint32 id, Sint32 width, Sint32 height) {
     for (unsigned int i = 0 ; i < ASC_MAX_WINDOWS ; i++) {
         if (asc_context.windows[i].id == id) {