封装时间计算类

main.cpp

@@ -5,6 +5,7 @@
 #include <stdio.h>
 #include "misc.h"
 #include "model.h"
+#include "timer.h"
 #pragma comment(lib,"opengl32.lib")
 #pragma comment(lib, "glew32.lib")
 
@@ -105,7 +106,10 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	/*load model*/
 	unsigned int *indexes = nullptr;
 	int vertexCount = 0, indexCount = 0;
+	Timer t;
+	t.Start();
 	VertexData* vertexes = LoadObjModel("res/model/Quad.obj", &indexes, vertexCount, indexCount);
+	printf("load model cost %fs %d\n", t.GetPassedTime(), t.GetPassedTickers());
 
 	if (vertexes == nullptr) {
 		printf("load obj model fail\n");

shader2.vcxproj

@@ -149,10 +149,12 @@
     <ClCompile Include="main.cpp" />
     <ClCompile Include="misc.cpp" />
     <ClCompile Include="model.cpp" />
+    <ClCompile Include="timer.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="misc.h" />
     <ClInclude Include="model.h" />
+    <ClInclude Include="timer.h" />
   </ItemGroup>
   <ItemGroup>
     <None Include="res\shader\test.fs" />

shader2.vcxproj.filters

@@ -24,6 +24,9 @@
     <ClCompile Include="model.cpp">
       <Filter>源文件</Filter>
     </ClCompile>
+    <ClCompile Include="timer.cpp">
+      <Filter>源文件</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="misc.h">
@@ -32,6 +35,9 @@
     <ClInclude Include="model.h">
       <Filter>源文件</Filter>
     </ClInclude>
+    <ClInclude Include="timer.h">
+      <Filter>源文件</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="res\shader\test.fs">

timer.cpp

@@ -0,0 +1,32 @@
+#include "timer.h"
+
+Timer::Timer()
+{
+	mCurrentThread = GetCurrentThread();
+	DWORD_PTR systemAffinityMask;
+	GetProcessAffinityMask(GetCurrentProcess(), &mProcessAffinityMask, &systemAffinityMask);
+	
+	SetThreadAffinityMask(mCurrentThread, 1);
+	QueryPerformanceFrequency(&mCPUFrequency);
+	SetThreadAffinityMask(mCurrentThread, mProcessAffinityMask);
+}
+
+void Timer::Start()
+{
+	SetThreadAffinityMask(mCurrentThread, 1);
+	QueryPerformanceCounter(&mStart);
+	SetThreadAffinityMask(mCurrentThread, mProcessAffinityMask);
+}
+
+int Timer::GetPassedTickers()
+{
+	SetThreadAffinityMask(mCurrentThread, 1);
+	QueryPerformanceCounter(&mEnd);
+	SetThreadAffinityMask(mCurrentThread, mProcessAffinityMask);
+	return mEnd.QuadPart - mStart.QuadPart;
+}
+
+float Timer::GetPassedTime()
+{
+	return (float)GetPassedTickers() / (float)mCPUFrequency.QuadPart;
+}

timer.h

@@ -0,0 +1,16 @@
+#pragma once
+#include "windows.h"
+
+class Timer {
+public:
+	HANDLE mCurrentThread;
+	LARGE_INTEGER mStart;
+	LARGE_INTEGER mEnd;
+	LARGE_INTEGER mCPUFrequency;
+	DWORD_PTR mProcessAffinityMask;
+
+	Timer();
+	void Start();
+	int GetPassedTickers();
+	float GetPassedTime();
+};