update Application frame ticker

src/kiwano/core/Time.h

@@ -263,17 +263,17 @@ inline void Duration::SetMilliseconds(int64_t ms)
 
 inline void Duration::SetSeconds(float seconds)
 {
-    milliseconds_ = static_cast<long>(seconds * 1000.f);
+    milliseconds_ = static_cast<int64_t>(seconds * 1000.f);
 }
 
 inline void Duration::SetMinutes(float minutes)
 {
-    milliseconds_ = static_cast<long>(minutes * 60 * 1000.f);
+    milliseconds_ = static_cast<int64_t>(minutes * 60 * 1000.f);
 }
 
 inline void Duration::SetHours(float hours)
 {
-    milliseconds_ = static_cast<long>(hours * 60 * 60 * 1000.f);
+    milliseconds_ = static_cast<int64_t>(hours * 60 * 60 * 1000.f);
 }
 
 inline bool Time::IsZero() const

src/kiwano/platform/Application.cpp

@@ -42,9 +42,6 @@ Application::Application()
     Use(Renderer::GetInstance());
     Use(Input::GetInstance());
     Use(Director::GetInstance());
-
-    ticker_ = Ticker::Create(0);
-    ticker_->Tick();
 }
 
 Application::~Application()
@@ -76,11 +73,27 @@ void Application::Run(RunnerPtr runner, bool debug)
 
     while (running_)
     {
-        if (ticker_->Tick())
+        if (!frame_ticker_)
         {
-            if (!runner->MainLoop(ticker_->GetDeltaTime()))
+            frame_ticker_ = Ticker::Create(0);
+        }
+
+        if (frame_ticker_->Tick())
+        {
+            // Execute main loop
+            if (!runner->MainLoop(frame_ticker_->GetDeltaTime()))
                 running_ = false;
         }
+        else
+        {
+            // Releases CPU
+            Duration total_dt = frame_ticker_->GetDeltaTime() + frame_ticker_->GetErrorTime();
+            Duration sleep_dt = frame_ticker_->GetInterval() - total_dt;
+            if (sleep_dt.Milliseconds() > 1LL)
+            {
+                sleep_dt.Sleep();
+            }
+        }
     }
 
     this->Destroy();
@@ -89,19 +102,17 @@ void Application::Run(RunnerPtr runner, bool debug)
 void Application::Pause()
 {
     is_paused_ = true;
-    if (ticker_)
-    {
-        ticker_->Pause();
-    }
+
+    if (frame_ticker_)
+        frame_ticker_->Pause();
 }
 
 void Application::Resume()
 {
     is_paused_ = false;
-    if (ticker_)
-    {
-        ticker_->Resume();
-    }
+
+    if (frame_ticker_)
+        frame_ticker_->Resume();
 }
 
 void Application::Quit()

src/kiwano/platform/Application.h

@@ -78,6 +78,19 @@ public:
      */
     void Quit();
 
+    /**
+     * \~chinese
+     * @brief 获取暂停状态
+     */
+    bool IsPaused() const;
+
+    /**
+     * \~chinese
+     * @brief 添加模块
+     * @param[in] module 模块
+     */
+    void Use(Module& module);
+
     /**
      * \~chinese
      * @brief 获取程序运行器
@@ -92,22 +105,15 @@ public:
 
     /**
      * \~chinese
-     * @brief 获取报时器
+     * @brief 获取帧报时器
      */
-    TickerPtr GetTicker() const;
+    TickerPtr GetFrameTicker() const;
 
     /**
      * \~chinese
-     * @brief 获取暂停状态
+     * @brief 设置帧报时器
      */
-    bool IsPaused() const;
-
-    /**
-     * \~chinese
-     * @brief 添加模块
-     * @param[in] module 模块
-     */
-    void Use(Module& module);
+    void SetFrameTicker(TickerPtr ticker);
 
     /**
      * \~chinese
@@ -166,7 +172,7 @@ private:
     bool                    is_paused_;
     float                   time_scale_;
     RunnerPtr               runner_;
-    TickerPtr               ticker_;
+    TickerPtr               frame_ticker_;
     List<Module*>           modules_;
     std::mutex              perform_mutex_;
     Queue<Function<void()>> functions_to_perform_;
@@ -183,9 +189,14 @@ inline WindowPtr Application::GetMainWindow() const
     return runner_->GetMainWindow();
 }
 
-inline TickerPtr Application::GetTicker() const
+inline TickerPtr Application::GetFrameTicker() const
 {
-    return ticker_;
+    return frame_ticker_;
+}
+
+inline void Application::SetFrameTicker(TickerPtr ticker)
+{
+    frame_ticker_ = ticker;
 }
 
 inline bool Application::IsPaused() const

src/kiwano/platform/win32/WindowImpl.cpp

@@ -34,6 +34,8 @@
 #include <Windowsx.h>  // GET_X_LPARAM, GET_Y_LPARAM
 #include <imm.h>       // ImmAssociateContext
 #pragma comment(lib, "imm32.lib")
+#include <timeapi.h>  // timeBeginPeriod, timeEndPeriod
+#pragma comment(lib, "winmm.lib")
 
 namespace kiwano
 {
@@ -185,6 +187,8 @@ WindowWin32Impl::WindowWin32Impl()
     // F1 - F12
     for (size_t i = 0; i < 12; ++i)
         key_map_[VK_F1 + i] = KeyCode(size_t(KeyCode::F1) + i);
+
+    ::timeBeginPeriod(0);
 }
 
 WindowWin32Impl::~WindowWin32Impl()
@@ -194,6 +198,8 @@ WindowWin32Impl::~WindowWin32Impl()
         ::DestroyWindow(handle_);
         handle_ = nullptr;
     }
+
+    ::timeEndPeriod(0);
 }
 
 void WindowWin32Impl::Init(const String& title, uint32_t width, uint32_t height, uint32_t icon, bool resizable)

src/kiwano/utils/Ticker.cpp

@@ -65,9 +65,16 @@ bool Ticker::Tick(Duration dt)
     if (ticked_count_ == total_tick_count_)
         return false;
 
+    if (interval_.IsZero())
+    {
+        delta_time_ = dt;
+        ++ticked_count_;
+        return true;
+    }
+
     elapsed_time_ += dt;
 
-    if (elapsed_time_ + error_time_ > interval_)
+    if (elapsed_time_ + error_time_ >= interval_)
     {
         delta_time_   = elapsed_time_;
         error_time_   = (elapsed_time_ + error_time_) - interval_;

src/kiwano/utils/Ticker.h

@@ -87,6 +87,10 @@ public:
     /// @brief 设置报时间隔
     void SetInterval(Duration interval);
 
+    /// \~chinese
+    /// @brief 获取时间误差
+    Duration GetErrorTime() const;
+
     /// \~chinese
     /// @brief 获取计时器
     TimerPtr GetTimer();
@@ -140,4 +144,9 @@ inline void Ticker::SetInterval(Duration interval)
     interval_ = interval;
 }
 
+inline Duration Ticker::GetErrorTime() const
+{
+    return error_time_;
+}
+
 }  // namespace kiwano