2 files changed, 21 insertions, 0 deletions

diff --git a/app/include/dxwindow.h b/app/include/dxwindow.h
index 7e5a373..14caa36 100644
--- a/app/include/dxwindow.h
+++ b/app/include/dxwindow.h
@@ -21,8 +21,17 @@ void window_global_quit();
 /// Return the last Window error.
 const char* window_get_error();
 
+/// Initialize the window.
 Window* window_init(int width, int height, const char* title);
+
+/// Destroy the window.
 void window_destroy(Window**);
+
+/// Return the Windows handle.
 HWND window_handle(Window*);
+
+/// Update the window, poll for events.
 void window_update(Window*);
+
+/// Return whether the user has requested that the window should be closed.
 bool window_should_close(const Window*);
diff --git a/hello/main.c b/hello/main.c
index 738f5c0..44f8a90 100644
--- a/hello/main.c
+++ b/hello/main.c
@@ -47,6 +47,7 @@ static void d3d_create_swap_chain(D3D* d3d) {
     assert(d3d);
     assert(d3d->pDxgiFactory);
     assert(d3d->pCommandQueue);
+    assert(d3d->pWindow);
 
     SafeRelease(d3d->pSwapChain);
 
@@ -80,7 +81,9 @@ static void d3d_create_swap_chain_buffer_render_target_views(D3D* d3d) {
     assert(d3d);
     assert(d3d->pDevice);
     assert(d3d->pSwapChain);
+    assert(d3d->pSwapChainBuffer);
     assert(d3d->pRtvHeap);
+    assert(d3d->rtv_descriptor_size > 0);
 
     // Create the new buffer views.
     D3D12_CPU_DESCRIPTOR_HANDLE rtv_heap_handle;
@@ -276,6 +279,7 @@ static void d3d_init(D3D* d3d, Window* pWindow, const D3DSettings* pSettings) {
 
 static D3D12_CPU_DESCRIPTOR_HANDLE d3d_get_current_back_buffer_view(const D3D* d3d) {
     assert(d3d);
+    assert(d3d->pSwapChain);
     assert(d3d->pRtvHeap);
     assert(d3d->rtv_descriptor_size > 0);
     D3D12_CPU_DESCRIPTOR_HANDLE rtv_handle;
@@ -288,11 +292,15 @@ static D3D12_CPU_DESCRIPTOR_HANDLE d3d_get_current_back_buffer_view(const D3D* d
 
 static ID3D12Resource* d3d_get_current_back_buffer(const D3D* d3d) {
     assert(d3d);
+    assert(d3d->pSwapChain);
+    assert(d3d->pSwapChainBuffer);
     return d3d->pSwapChainBuffer[d3d->pSwapChain->lpVtbl->GetCurrentBackBufferIndex(d3d->pSwapChain)];
 }
 
 static void d3d_populate_command_list(D3D* d3d) {
     assert(d3d);
+    assert(d3d->pCommandAllocator);
+    assert(d3d->pCommandList);
 
     /// Note that we skip the following two items:
     ///
@@ -356,6 +364,8 @@ static void d3d_populate_command_list(D3D* d3d) {
 
 static void d3d_wait_for_previous_frame(D3D* d3d) {
     assert(d3d);
+    assert(d3d->pFence);
+    assert(d3d->pCommandQueue);
 
     // Advance the fence value to mark commands up to this fence point.
     d3d->fence_value++;
@@ -385,6 +395,8 @@ static void d3d_wait_for_previous_frame(D3D* d3d) {
 
 static void d3d_render(D3D* d3d) {
     assert(d3d);
+    assert(d3d->pCommandQueue);
+    assert(d3d->pSwapChain);
 
     d3d_populate_command_list(d3d);