Mercurial > hg > ascension / changeset

--- a/src/Makefile	Mon Oct 30 18:54:16 2023 +0100
+++ b/src/Makefile	Wed Nov 01 20:09:49 2023 +0100
@@ -27,21 +27,25 @@
 
 BUILD_DIR=../build/lib
 
-SRC  = core.c
+SRC  = core.c window.c
 
 OBJ = $(SRC:%.c=$(BUILD_DIR)/%.o)
 
 all: $(BUILD_DIR)/libascension.a FORCE
-	echo "You have successfully ascended."
+	@echo "You have successfully ascended."
 
 $(BUILD_DIR)/libascension.a: $(OBJ)
-	echo "Creating library..."
+	@echo "Creating library..."
 	$(AR) $(ARFLAGS) $@ $^
 
 FORCE:
 
-$(BUILD_DIR)/core.o: core.c ascension/core.h ascension/datatypes.h \
- ascension/utils.h
-	echo "Compiling $<"
+$(BUILD_DIR)/core.o: core.c ascension/core.h ascension/datatypes.h
+	@echo "Compiling $<"
 	$(CC) -o $@ $(CFLAGS) -c $<
 
+$(BUILD_DIR)/window.o: window.c ascension/window.h ascension/core.h \
+ ascension/datatypes.h
+	@echo "Compiling $<"
+	$(CC) -o $@ $(CFLAGS) -c $<
+

--- a/src/ascension/core.h	Mon Oct 30 18:54:16 2023 +0100
+++ b/src/ascension/core.h	Wed Nov 01 20:09:49 2023 +0100
@@ -28,10 +28,6 @@
 #ifndef ASCENSION_CORE_H
 #define ASCENSION_CORE_H
 
-#include <SDL2/SDL.h>
-#include <SDL2/SDL_ttf.h>
-#include <GL/glew.h>
-
 #include <cx/string.h>
 #include <cx/buffer.h>
 #include <cx/list.h>
@@ -60,23 +56,6 @@
 /** Global ascension context. */
 extern AscContext asc_context;
 
-typedef struct AscWindowSettings {
-    int depth_size;
-    int vsync;
-    asc_vec2i dimensions;
-    int fullscreen;
-    int gl_major_version;
-    int gl_minor_version;
-    char const* title;
-} AscWindowSettings;
-
-typedef struct AscWindow {
-    SDL_Window* window;
-    SDL_GLContext glctx;
-    Uint32 id;
-    asc_vec2i dimensions;
-} AscWindow;
-
 void asc_context_initialize(void);
 void asc_context_destroy(void);
 
@@ -107,47 +86,11 @@
 char const* asc_get_error(void);
 void asc_clear_error(void);
 
-/**
- * Dispatches events and synchronizes all initialized windows.
- *
- * @return false, if one of the events is a QUIT event, true otherwise
- */
-bool asc_loop_next(void);
-
-/**
- * Initializes the settings structure with default values.
- *
- * @param settings an uninitialized settings object
- */
-void asc_window_settings_init_defaults(AscWindowSettings* settings);
-
-/**
- * Creates and initializes a new window and a corresponding OpenGL context.
- *
- * @param window the window structure
- * @param settings the settings to be used for initialization
- */
-void asc_window_initialize(AscWindow* window, AscWindowSettings const* settings);
-
-/**
- * Destroys the window and its OpenGL context.
- *
- * Still alive windows will also be destroyed by asc_context_destroy()
- * automatically.
- *
- * @param window the window
- */
-void asc_window_destroy(AscWindow* window);
-
-/**
- * Swaps buffers and adjusts the viewport to the current window size.
- *
- * This function is automatically invoked for all initialized windows
- * by asc_loop_next(). You usually do not need to call this function manually.
- *
- * @param window the window
- */
-void asc_window_sync(AscWindow const *window);
+#ifdef NDEBUG
+#define asc_dprintf(...)
+#else
+#define asc_dprintf(...) printf(__VA_ARGS__); putchar('\n')
+#endif
 
 #ifdef __cplusplus
 } // extern "C"

--- a/src/ascension/datatypes.h	Mon Oct 30 18:54:16 2023 +0100
+++ b/src/ascension/datatypes.h	Wed Nov 01 20:09:49 2023 +0100
@@ -28,6 +28,7 @@
 #ifndef ASCENSION_DATATYPES_H
 #define ASCENSION_DATATYPES_H
 
+#include <stdbool.h>
 #include <SDL2/SDL_endian.h>
 
 #ifdef __cplusplus

--- a/src/ascension/utils.h	Mon Oct 30 18:54:16 2023 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,48 +0,0 @@
-/*
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
- * Copyright 2023 Mike Becker. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *   1. Redistributions of source code must retain the above copyright
- *      notice, this list of conditions and the following disclaimer.
- *
- *   2. Redistributions in binary form must reproduce the above copyright
- *      notice, this list of conditions and the following disclaimer in the
- *      documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef ASCENSION_UTILS_H
-#define ASCENSION_UTILS_H
-
-#include <stdbool.h>
-#include <stdio.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifdef NDEBUG
-#define asc_dprintf(...)
-#else
-#define asc_dprintf(...) printf(__VA_ARGS__); putchar('\n')
-#endif
-
-#ifdef __cplusplus
-} // extern "C"
-#endif
-
-#endif // ASCENSION_UTILS_H
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/ascension/window.h	Wed Nov 01 20:09:49 2023 +0100
@@ -0,0 +1,104 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ * Copyright 2023 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ASCENSION_WINDOW_H
+#define ASCENSION_WINDOW_H
+
+#include <SDL2/SDL.h>
+
+#include "core.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct AscWindowSettings {
+    int depth_size;
+    int vsync;
+    asc_vec2i dimensions;
+    int fullscreen;
+    int gl_major_version;
+    int gl_minor_version;
+    char const* title;
+} AscWindowSettings;
+
+typedef struct AscWindow {
+    SDL_Window* window;
+    SDL_GLContext glctx;
+    Uint32 id;
+    asc_vec2i dimensions;
+} AscWindow;
+
+
+/**
+ * Dispatches events and synchronizes all initialized windows.
+ *
+ * @return false, if one of the events is a QUIT event, true otherwise
+ */
+bool asc_loop_next(void);
+
+/**
+ * Initializes the settings structure with default values.
+ *
+ * @param settings an uninitialized settings object
+ */
+void asc_window_settings_init_defaults(AscWindowSettings* settings);
+
+/**
+ * Creates and initializes a new window and a corresponding OpenGL context.
+ *
+ * @param window the window structure
+ * @param settings the settings to be used for initialization
+ */
+void asc_window_initialize(AscWindow* window, AscWindowSettings const* settings);
+
+/**
+ * Destroys the window and its OpenGL context.
+ *
+ * Still alive windows will also be destroyed by asc_context_destroy()
+ * automatically.
+ *
+ * @param window the window
+ */
+void asc_window_destroy(AscWindow* window);
+
+/**
+ * Swaps buffers and adjusts the viewport to the current window size.
+ *
+ * This function is automatically invoked for all initialized windows
+ * by asc_loop_next(). You usually do not need to call this function manually.
+ *
+ * @param window the window
+ */
+void asc_window_sync(AscWindow const *window);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif /* ASCENSION_WINDOW_H */
+

--- 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);
-}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/window.c	Wed Nov 01 20:09:49 2023 +0100
@@ -0,0 +1,200 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ * Copyright 2023 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "ascension/window.h"
+
+#include <cx/linked_list.h>
+#include <cx/printf.h>
+
+#include <GL/glew.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);
+}
+
+
+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);
+}

--- a/test/Makefile	Mon Oct 30 18:54:16 2023 +0100
+++ b/test/Makefile	Wed Nov 01 20:09:49 2023 +0100
@@ -33,11 +33,13 @@
 	@echo "Sandbox demo successfully built."
 
 $(BUILD_DIR)/sandbox: $(BUILD_DIR)/sandbox.o $(LIB_ASCENSION)
-	echo "Linking executable..."
+	@echo "Linking executable..."
 	$(CC) $(LDFLAGS) -o $@ $^
 
-$(BUILD_DIR)/sandbox.o: sandbox.c ../src/ascension/core.h
-	echo "Compiling $<"
+FORCE:
+
+$(BUILD_DIR)/sandbox.o: sandbox.c ../src/ascension/window.h \
+ ../src/ascension/core.h ../src/ascension/datatypes.h
+	@echo "Compiling $<"
 	$(CC) -o $@ $(CFLAGS) -c $<
 
-FORCE:

--- a/test/sandbox.c	Mon Oct 30 18:54:16 2023 +0100
+++ b/test/sandbox.c	Wed Nov 01 20:09:49 2023 +0100
@@ -25,7 +25,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "ascension/core.h"
+#include "ascension/window.h"
 
 static bool show_message_box_on_error(SDL_Window* window) {
     if (asc_has_error()) {