diff -r 9f7bfc0a1dc3 -r 84a546e282b7 src/glcontext.c
--- a/src/glcontext.c	Fri Apr 18 19:34:31 2025 +0200
+++ b/src/glcontext.c	Fri Apr 18 20:13:01 2025 +0200
@@ -48,9 +48,25 @@
     cx_strfree(&buf);
 }
 
+static int asc_primitives_init(AscGLContext *context) {
+    asc_dprintf("Create primitives for the GL context of active window.");
+    asc_mesh_allocate_buffers((AscMesh*)&context->primitives, sizeof(context->primitives) / sizeof(AscMesh));
+
+    asc_primitives_init_plane(&context->primitives.plane);
+    // TODO: more primitives
+
+    return asc_error_catch_all_gl();
+}
+
+static void asc_primitives_destroy(AscGLContext *context) {
+    asc_dprintf("Destroy primitives in GL context of active window.");
+    asc_mesh_free_buffers((AscMesh*)&context->primitives, sizeof(context->primitives) / sizeof(AscMesh));
+}
+
 static int asc_shader_initialize_predefined(AscGLContext *ctx) {
     int ret = 0;
     ret |= asc_shader_sprite_init(&ctx->shader.sprite);
+    ret |= asc_error_catch_all_gl();
     return ret;
 }
 
@@ -81,13 +97,14 @@
         glEnable(GL_DEBUG_OUTPUT);
         glDebugMessageCallback(asc_gl_debug_callback, NULL);
 
-        if (!asc_primitives_init(&ctx->primitives)) {
+        if (asc_primitives_init(ctx)) {
             asc_error("Creating primitive meshes failed");
             SDL_GL_DeleteContext(ctx->glctx);
             return false;
         }
 
         if (asc_shader_initialize_predefined(ctx)) {
+            asc_error("Initializing predefined shaders failed");
             SDL_GL_DeleteContext(ctx->glctx);
             return false;
         }
@@ -105,7 +122,7 @@
     SDL_GL_MakeCurrent(ctx->window, ctx->glctx);
 
     asc_shader_destroy_predefined(ctx);
-    asc_primitives_destroy(&ctx->primitives);
+    asc_primitives_destroy(ctx);
 
     // destroy the GL context and the window
     SDL_GL_DeleteContext(ctx->glctx);