diff -r 7e1196d551ff -r 302971e8599b src/core.c
--- a/src/core.c	Mon Oct 30 18:54:16 2023 +0100
+++ b/src/core.c	Wed Nov 01 20:09:49 2023 +0100
@@ -26,31 +26,17 @@
  */
 
 #include "ascension/core.h"
-#include "ascension/utils.h"
 
 #include <cx/linked_list.h>
 #include <cx/printf.h>
 
-static void asc_gl_debug_callback(
-        GLenum source, GLenum type, GLuint id, GLenum severity,
-        GLsizei length, const GLchar* message,
-        const void* userParam
-) {
-    cxmutstr buf = cx_asprintf(
-            "source = %d, id = %u, type = %d, severity= %d, message = %.*s",
-            source, id, type, severity, length, message);
-    if (type == GL_DEBUG_TYPE_ERROR) {
-        asc_error(buf.ptr);
-    } else {
-        asc_dprintf("GL debug: %*.s", (int)buf.length, buf.ptr);
-    }
-    cx_strfree(&buf);
-}
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_ttf.h>
 
 AscContext asc_context;
 
-// forward declarations
-static void asc_window_destroy_impl(AscWindow* window);
+// forward declare the destructor functions that reside in other units
+void asc_window_destroy_impl(void* obj);
 
 void asc_context_initialize(void) {
     if (asc_test_flag(asc_context.flags, ASC_FLAG_INITILIZED))
@@ -137,153 +123,3 @@
     cxBufferClear(&asc_context.error_buffer);
     asc_clear_flag(&asc_context.flags, ASC_FLAG_HAS_ERROR);
 }
-
-static void asc_event_window_resized(Uint32 id, Sint32 width, Sint32 height) {
-    CxIterator iter = cxListIterator(asc_context.windows);
-    cx_foreach(AscWindow*, w, iter) {
-        if (w->id == id) {
-            w->dimensions.width = width;
-            w->dimensions.height = height;
-            return;
-        }
-    }
-}
-
-bool asc_loop_next(void) {
-    // dispatch SDL events
-    SDL_Event event;
-    while (SDL_PollEvent(&event)) {
-        switch (event.type) {
-        case SDL_QUIT:return false;
-        case SDL_WINDOWEVENT: {
-            if (event.window.type == SDL_WINDOWEVENT_RESIZED)
-                asc_event_window_resized(
-                        event.window.windowID,
-                        event.window.data1,
-                        event.window.data2
-                );
-            break;
-        }
-        case SDL_KEYDOWN:
-            // TODO: remove this code and implement key press map instead
-            if (event.key.keysym.sym == SDLK_ESCAPE)
-                return false;
-            break;
-        case SDL_KEYUP:
-            // TODO: implement key press map
-            break;
-        }
-    }
-
-    // sync the windows
-    CxMutIterator windows = cxListMutIterator(asc_context.windows);
-    cx_foreach(AscWindow*, w, windows) {
-        asc_window_sync(w);
-    }
-    return true;
-}
-
-void asc_window_settings_init_defaults(AscWindowSettings* settings) {
-    settings->depth_size = 24;
-    settings->vsync = 1;
-    settings->dimensions.width = 800;
-    settings->dimensions.height = 600;
-    settings->fullscreen = 0;
-    settings->gl_major_version = 3;
-    settings->gl_minor_version = 3;
-    settings->title = "Ascended Window";
-}
-
-void asc_window_initialize(AscWindow* window, AscWindowSettings const* settings) {
-    Uint32 flags = SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN;
-    flags |= settings->fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : SDL_WINDOW_RESIZABLE;
-
-    window->window = SDL_CreateWindow(
-            settings->title,
-            SDL_WINDOWPOS_CENTERED,
-            SDL_WINDOWPOS_CENTERED,
-            settings->dimensions.width,
-            settings->dimensions.height,
-            flags
-    );
-    if (window->window == NULL) {
-        asc_error(SDL_GetError());
-        return;
-    }
-
-    window->id = SDL_GetWindowID(window->window);
-    SDL_GetWindowSize(window->window,
-            &window->dimensions.width,
-            &window->dimensions.height
-    );
-
-    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
-    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, settings->gl_major_version);
-    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, settings->gl_minor_version);
-    SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, settings->depth_size);
-    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
-    window->glctx = SDL_GL_CreateContext(window->window);
-    if (window->glctx == NULL) {
-        asc_dprintf("Creating GL context failed for window %u", window->id);
-    } else {
-        glewExperimental = GL_TRUE;
-        GLenum err = glewInit();
-        if (err == GLEW_OK) {
-            SDL_GL_SetSwapInterval(settings->vsync);
-            glEnable(GL_DEPTH_TEST);
-            glEnable(GL_BLEND);
-            glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-            glEnable(GL_DEBUG_OUTPUT);
-            glDebugMessageCallback(asc_gl_debug_callback, NULL);
-            asc_dprintf("Window %u initialized", window->id);
-            cxListAdd(asc_context.windows, window);
-            return;
-        } else {
-            asc_error(glewGetErrorString(err));
-        }
-    }
-
-    // cleanup on error
-    if (window->glctx != NULL) {
-        SDL_GL_DeleteContext(window->glctx);
-    }
-    window->glctx = NULL;
-    SDL_DestroyWindow(window->window);
-    window->window = NULL;
-    window->id = 0;
-}
-
-void asc_window_destroy_impl(AscWindow* window) {
-    // destory the GL context and the window
-    if (window->glctx != NULL) {
-        SDL_GL_DeleteContext(window->glctx);
-    }
-    if (window->window != NULL) {
-        SDL_DestroyWindow(window->window);
-    }
-
-    // clean the data
-    asc_dprintf("Window %u and its OpenGL context destroyed.", window->id);
-    memset(window, 0, sizeof(AscWindow));
-}
-
-void asc_window_destroy(AscWindow* window) {
-    // find the window in the context and remove it
-    bool found = false;
-    CxMutIterator iter = cxListMutIterator(asc_context.windows);
-    cx_foreach(AscWindow*, w, iter) {
-        if (w == window) {
-            found = true;
-            cxIteratorFlagRemoval(iter);
-        }
-    }
-    if (!found) asc_window_destroy_impl(window);
-}
-
-void asc_window_sync(AscWindow const* window) {
-    SDL_GL_MakeCurrent(window->window, window->glctx);
-    SDL_GL_SwapWindow(window->window);
-    glViewport(0, 0, window->dimensions.width, window->dimensions.height);
-    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
-    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-}