Letterbox, maintain render-resolution's aspect ratio

mesh.odin

@@ -161,6 +161,8 @@ create_mesh_from_primitive :: proc(renderer: ^Renderer, primitive_mesh_type: Pri
 
             vertices := make([dynamic]f32, 0)
             indices  := make([dynamic]u32, 0)
+            defer delete(vertices)
+            defer delete(indices)
 
             for y in 0..=Y_SEGMENTS {
                 y_segment := f32(y) / f32(Y_SEGMENTS)
@@ -233,4 +235,13 @@ create_mesh_from_primitive :: proc(renderer: ^Renderer, primitive_mesh_type: Pri
     }
 
     return {}, false
+}
+
+delete_mesh :: proc(renderer: ^Renderer, mesh: ^Mesh) {
+    assert(renderer != nil)
+    assert(mesh != nil)
+
+    when RENDER_BACKEND_OPENGL {
+        opengl_delete_mesh(renderer, mesh)
+    }
 }