Danbias/Code/Game/DanBiasGame/DanBiasGame_Impl.cpp

#define NOMINMAX
#include <Windows.h>
#include "Include\DanBiasGame.h"

namespace DanBias
{
	__int64 DanBiasGame::cntsPerSec		= 0;
	__int64 DanBiasGame::prevTimeStamp	= 0;
	float DanBiasGame::secsPerCnt		= 0;
	InputClass* DanBiasGame::inputObj	= NULL;
	HINSTANCE DanBiasGame::g_hInst		= NULL;
	HWND DanBiasGame::g_hWnd			= NULL;

#pragma region Game Data
	class DanBiasGamePrivateData
	{

	public:
		DanBiasGamePrivateData()
		{

		}
		~DanBiasGamePrivateData()
		{

		}

		public:

	} data;
#pragma endregion

	//--------------------------------------------------------------------------------------
	// Interface API functions
	//--------------------------------------------------------------------------------------
	DanBiasClientReturn DanBiasGame::Initiate(DanBiasGameDesc& desc)
	{
		if( FAILED( InitWindow( desc.hinst, desc.nCmdShow ) ))
			return DanBiasClientReturn_Error;

		if( FAILED( InitDirect3D() ) )
			return DanBiasClientReturn_Error;

		if( FAILED( InitGame() ) )
			return DanBiasClientReturn_Error;

		cntsPerSec = 0;
		QueryPerformanceFrequency((LARGE_INTEGER*)&cntsPerSec);
		secsPerCnt = 1.0f / (float)cntsPerSec;

		prevTimeStamp = 0;
		QueryPerformanceCounter((LARGE_INTEGER*)&prevTimeStamp);

		return DanBiasClientReturn_Sucess;
	}

	DanBiasClientReturn DanBiasGame::Run()
	{
		// Main message loop
		MSG msg = {0};
		while(WM_QUIT != msg.message)
		{
			if( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE) )
			{
				TranslateMessage( &msg );
				DispatchMessage( &msg );
			}
			else
			{
				__int64 currTimeStamp = 0;
				QueryPerformanceCounter((LARGE_INTEGER*)&currTimeStamp);
				float dt = (currTimeStamp - prevTimeStamp) * secsPerCnt;

				//render
				Update(dt);
				Render(dt);

				prevTimeStamp = currTimeStamp;
			}
		}
		return DanBiasClientReturn_Sucess;
	}

	void DanBiasGame::Release()
	{
		CleanUp();
	}


	//--------------------------------------------------------------------------------------
	// Register class and create window
	//--------------------------------------------------------------------------------------
	HRESULT DanBiasGame::InitWindow( HINSTANCE hInstance, int nCmdShow )
	{
		// Register class
		WNDCLASSEX wcex;
		wcex.cbSize = sizeof(WNDCLASSEX); 
		wcex.style          = CS_HREDRAW | CS_VREDRAW;
		wcex.lpfnWndProc    = WndProc;
		wcex.cbClsExtra     = 0;
		wcex.cbWndExtra     = 0;
		wcex.hInstance      = hInstance;
		wcex.hIcon          = 0;
		wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
		wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
		wcex.lpszMenuName   = NULL;
		wcex.lpszClassName  = L"BTH_D3D_Template";
		wcex.hIconSm        = 0;
		if( !RegisterClassEx(&wcex) )
			return E_FAIL;

		// Adjust and create window
		g_hInst = hInstance; 
		RECT rc = { 0, 0, 1024, 768 };
		AdjustWindowRect( &rc, WS_OVERLAPPEDWINDOW, FALSE );

		if(!(g_hWnd = CreateWindow(
			L"BTH_D3D_Template",
			L"BTH - Direct3D 11.0 Template",
			WS_OVERLAPPEDWINDOW,
			CW_USEDEFAULT,
			CW_USEDEFAULT,
			rc.right - rc.left,
			rc.bottom - rc.top,
			NULL,
			NULL,
			hInstance,
			NULL)))
		{
			return E_FAIL;
		}
		ShowWindow( g_hWnd, nCmdShow );

		return S_OK;
	}

	//--------------------------------------------------------------------------------------
	// Create Direct3D with Oyster Graphics
	//--------------------------------------------------------------------------------------
	HRESULT DanBiasGame::InitDirect3D()
	{
		if(Oyster::Graphics::API::Init(g_hWnd, false, false, Oyster::Math::Float2( 1024, 768)) != Oyster::Graphics::API::Sucsess)
			return E_FAIL;
		return S_OK;
	}

	//--------------------------------------------------------------------------------------
	// Init the input and the game
	//-------------------------------------------------------------------------------------
	HRESULT DanBiasGame::InitGame()
	{
		inputObj = new InputClass;
		if(!inputObj->Initialize(g_hInst, g_hWnd, 1024, 768))
		{
			MessageBox(0, L"Could not initialize the input object.", L"Error", MB_OK);
			return E_FAIL;
		}
	
		return S_OK;
	}
	
	HRESULT DanBiasGame::Update(float deltaTime)
	{
		inputObj->Update();

		return S_OK;
	}

	HRESULT DanBiasGame::Render(float deltaTime)
	{
		int isPressed = 0;
		if(inputObj->IsKeyPressed(DIK_A))
		{
			isPressed = 1;
		}

		Oyster::Graphics::API::NewFrame(Oyster::Math3D::Float4x4::null, Oyster::Math3D::Float4x4::null);
	
		wchar_t title[255];
		swprintf(title, sizeof(title), L"| Pressing A:  %d | \n", (int)(isPressed));
		SetWindowText(g_hWnd, title);

		Oyster::Graphics::API::EndFrame();

		return S_OK;
	}

	HRESULT DanBiasGame::CleanUp()
	{
		return S_OK;
	}	

	//--------------------------------------------------------------------------------------
	// Called every time the application receives a message
	//--------------------------------------------------------------------------------------
	LRESULT CALLBACK WndProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam )
	{
		PAINTSTRUCT ps;
		HDC hdc;

		switch (message) 
		{
		case WM_PAINT:
			hdc = BeginPaint(hWnd, &ps);
			EndPaint(hWnd, &ps);
			break;

		case WM_DESTROY:
			PostQuitMessage(0);
			break;

		case WM_KEYDOWN:

			switch(wParam)
			{
			case VK_ESCAPE:
				PostQuitMessage(0);
				break;
			}
			break;

		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
		}

		return 0;
	}

} //End namespace DanBias