fix bug: incorrect window size in fullscreen mode

src/kiwano/platform/Window.h

@@ -133,7 +133,7 @@ public:
      * @brief 设置全屏模式
      * @param fullscreen 是否全屏
      */
-    virtual void SetFullscreen(bool fullscreen) = 0;
+    virtual void SetFullscreenState(bool fullscreen) = 0;
 
     /**
      * \~chinese

src/kiwano/platform/win32/WindowImpl.cpp

@@ -55,7 +55,7 @@ public:
 
     void Resize(uint32_t width, uint32_t height) override;
 
-    void SetFullscreen(bool fullscreen) override;
+    void SetFullscreenState(bool fullscreen) override;
 
     void SetCursor(CursorType cursor) override;
 
@@ -279,7 +279,7 @@ void WindowWin32Impl::Init(const String& title, uint32_t width, uint32_t height,
 
     if (is_fullscreen_)
     {
-        SetFullscreen(true);
+        SetFullscreenState(true);
     }
 }
 
@@ -316,17 +316,15 @@ void WindowWin32Impl::Resize(uint32_t width, uint32_t height)
     KGE_ASSERT(handle_);
     if (!is_fullscreen_)
     {
-        MONITORINFOEXA info = GetMoniterInfoEx(handle_);
-
-        uint32_t screenw = uint32_t(info.rcWork.right - info.rcWork.left);
-        uint32_t screenh = uint32_t(info.rcWork.bottom - info.rcWork.top);
-
         RECT rc = { 0, 0, LONG(width), LONG(height) };
         ::AdjustWindowRect(&rc, GetStyle(), false);
 
         width  = rc.right - rc.left;
         height = rc.bottom - rc.top;
 
+        MONITORINFOEXA info    = GetMoniterInfoEx(handle_);
+        uint32_t       screenw = uint32_t(info.rcWork.right - info.rcWork.left);
+        uint32_t       screenh = uint32_t(info.rcWork.bottom - info.rcWork.top);
         int            left    = screenw > width ? ((screenw - width) / 2) : 0;
         int            top     = screenh > height ? ((screenh - height) / 2) : 0;
 
@@ -339,12 +337,19 @@ void WindowWin32Impl::Resize(uint32_t width, uint32_t height)
     }
 }
 
-void WindowWin32Impl::SetFullscreen(bool fullscreen)
+void WindowWin32Impl::SetFullscreenState(bool fullscreen)
 {
     if (is_fullscreen_ != fullscreen)
     {
         is_fullscreen_ = fullscreen;
 
+        // Adjust the rect of client area
+        RECT rc = { 0, 0, LONG(width_), LONG(height_) };
+        ::AdjustWindowRect(&rc, GetStyle(), false);
+
+        uint32_t width  = uint32_t(rc.right - rc.left);
+        uint32_t height = uint32_t(rc.bottom - rc.top);
+
         if (is_fullscreen_)
         {
             // Reset window style
@@ -352,17 +357,22 @@ void WindowWin32Impl::SetFullscreen(bool fullscreen)
 
             // Top the window
             MONITORINFOEXA info = GetMoniterInfoEx(handle_);
-            ::SetWindowPos(handle_, HWND_TOPMOST, info.rcMonitor.top, info.rcMonitor.left, width_, height_,
+            ::SetWindowPos(handle_, HWND_TOPMOST, info.rcMonitor.top, info.rcMonitor.left, width, height,
                            SWP_NOACTIVATE);
         }
         else
         {
+            MONITORINFOEXA info    = GetMoniterInfoEx(handle_);
+            uint32_t       screenw = uint32_t(info.rcWork.right - info.rcWork.left);
+            uint32_t       screenh = uint32_t(info.rcWork.bottom - info.rcWork.top);
+            int            left    = screenw > width ? ((screenw - width) / 2) : 0;
+            int            top     = screenh > height ? ((screenh - height) / 2) : 0;
+
             // Reset window style
             ::SetWindowLongPtrA(handle_, GWL_STYLE, GetStyle());
 
             // Unpin the window
-            ::SetWindowPos(handle_, HWND_NOTOPMOST, 0, 0, 0, 0,
-                           SWP_DRAWFRAME | SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOSIZE);
+            ::SetWindowPos(handle_, HWND_NOTOPMOST, left, top, width, height, SWP_DRAWFRAME | SWP_FRAMECHANGED);
         }
 
         ::ShowWindow(handle_, SW_SHOWNORMAL);

src/kiwano/render/DirectX/RendererImpl.cpp

@@ -120,6 +120,12 @@ void RendererImpl::MakeContextForWindow(WindowPtr window)
     KGE_THROW_IF_FAILED(hr, "Create render resources failed");
 }
 
+void RendererImpl::SetFullscreenState(bool fullscreen)
+{
+    KGE_ASSERT(d3d_res_);
+    d3d_res_->SetFullscreenState(fullscreen);
+}
+
 void RendererImpl::Destroy()
 {
     KGE_SYS_LOG("Destroying device resources");

src/kiwano/render/DirectX/RendererImpl.h

@@ -104,6 +104,8 @@ protected:
 
     void MakeContextForWindow(WindowPtr window) override;
 
+    void SetFullscreenState(bool fullscreen) override;
+
     void Destroy() override;
 
 private:

src/kiwano/render/Renderer.cpp

@@ -49,6 +49,11 @@ void Renderer::HandleEvent(Event* evt)
         auto window_evt = dynamic_cast<WindowResizedEvent*>(evt);
         Resize(window_evt->width, window_evt->height);
     }
+    else if (evt->IsType<WindowFullscreenEvent>())
+    {
+        auto window_evt = dynamic_cast<WindowFullscreenEvent*>(evt);
+        SetFullscreenState(window_evt->fullscreen);
+    }
 }
 
 void Renderer::BeginDraw()

src/kiwano/render/Renderer.h

@@ -246,6 +246,8 @@ protected:
 
     virtual void MakeContextForWindow(WindowPtr window) = 0;
 
+    virtual void SetFullscreenState(bool fullscreen) = 0;
+
     virtual void Destroy() = 0;
 
 protected: