update RenderContext

src/kiwano/render/DirectX/RenderContextImpl.cpp

@@ -76,19 +76,21 @@ void RenderContextImpl::DiscardDeviceResources()
 
 void RenderContextImpl::BeginDraw()
 {
+    KGE_ASSERT(render_target_ && "Render target has not been initialized!");
+
     SaveDrawingState();
 
     RenderContext::BeginDraw();
 
-    if (render_target_)
-    {
     render_target_->BeginDraw();
-    }
 }
 
 void RenderContextImpl::EndDraw()
 {
-    KGE_THROW_IF_FAILED(render_target_->EndDraw(), "ID2D1RenderTarget EndDraw failed");
+    KGE_ASSERT(render_target_ && "Render target has not been initialized!");
+
+    HRESULT hr = render_target_->EndDraw();
+    KGE_THROW_IF_FAILED(hr, "ID2D1RenderTarget EndDraw failed");
 
     RenderContext::EndDraw();
 

src/kiwano/utils/Logger.h

@@ -85,6 +85,14 @@
     } while (0)
 #endif
 
+#ifndef KGE_THROW_IF
+#define KGE_THROW_IF(EXPRESSION, MESSAGE) \
+    if (EXPRESSION)                       \
+    {                                     \
+        KGE_THROW(MESSAGE);               \
+    }
+#endif
+
 #ifndef KGE_THROW_SYSTEM_ERROR
 #define KGE_THROW_SYSTEM_ERROR(ERRCODE, MESSAGE)                                          \
     do                                                                                    \