游戏编程之地图绘制（用到字符串的宽字节的转化）

// CGPB_chapter3.2.cpp : 定义应用程序的入口点。
//
#pragma warning(disable:c4996)
//#define _CRT_SECURE_NO_WARNINGS
#include "stdafx.h"
#include "CGPB_chapter3.2.h"
#include<stdio.h>

#define MAX_LOADSTRING 100


HBITMAP fullmap;
HDC mdc;

const int rows = 8, cols = 8;




// 全局变量: 
HINSTANCE hInst;								// 当前实例
TCHAR szTitle[MAX_LOADSTRING];					// 标题栏文本
TCHAR szWindowClass[MAX_LOADSTRING];			// 主窗口类名
HWND hWnd;
// 此代码模块中包含的函数的前向声明: 
ATOM				MyRegisterClass(HINSTANCE hInstance);
BOOL				InitInstance(HINSTANCE, int);
LRESULT CALLBACK	WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK	About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY _tWinMain(_In_ HINSTANCE hInstance,
                     _In_opt_ HINSTANCE hPrevInstance,
                     _In_ LPTSTR    lpCmdLine,
                     _In_ int       nCmdShow)
{
	UNREFERENCED_PARAMETER(hPrevInstance);
	UNREFERENCED_PARAMETER(lpCmdLine);

 	// TODO:  在此放置代码。
	MSG msg;
	HACCEL hAccelTable;

	// 初始化全局字符串
	LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
	LoadString(hInstance, IDC_CGPB_CHAPTER32, szWindowClass, MAX_LOADSTRING);
	MyRegisterClass(hInstance);

	// 执行应用程序初始化: 
	if (!InitInstance (hInstance, nCmdShow))
	{
		return FALSE;
	}

	hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_CGPB_CHAPTER32));

	HDC hdc, bufdc;
	MoveWindow(hWnd,10,10,430,450,true);
	int mapIndex[rows*cols] = { 
		2, 2, 2, 2, 0, 1, 0, 1,
		0, 2, 2, 0, 0, 0, 1, 1,
		0, 0, 0, 0, 0, 0, 0, 1,
		2, 0, 0, 0, 0, 0, 2, 2,
		2, 0, 0, 0, 0, 2, 2, 2,
		2, 0, 0, 0, 2, 2, 0, 0,
		0, 0, 2, 2, 2, 0, 0, 1,
		0, 0, 2, 0, 0, 0, 1, 1
	};
	hdc = GetDC(hWnd);
	mdc = CreateCompatibleDC(hdc);
	bufdc = CreateCompatibleDC(hdc);
	fullmap = CreateCompatibleBitmap(hdc,cols*50,rows*50);
	SelectObject(mdc,fullmap);

	HBITMAP map[3];
	//注意这里字符串转化的过程,将  TCHAR[] 转 LPCWSTR 是 不用什么函数的，相通的
	// 主要用一个 _stprintf_s(filename, MAX_LOADSTRING, _T("map%d.bmp"), i); 这个东西转化
	TCHAR filename[100] ;
	int rowNum, colNum;
	int i, x, y;

	for (int i = 0; i < 3; i++){
		_stprintf_s(filename, MAX_LOADSTRING, _T("map%d.bmp"), i);
		//const char *d = (const char *)filename;
		//LPCWSTR tmp = _T(d);
		map[i] = (HBITMAP)LoadImage(NULL,filename,IMAGE_BITMAP,50,50,LR_LOADFROMFILE);
	}
	for (int i = 0; i < rows*cols; i++){
		SelectObject(bufdc,map[mapIndex[i]]);
		rowNum = i / cols;
		colNum = i%cols;
		x = colNum * 50;
		y = rowNum * 50;
		BitBlt(mdc,x,y,50,50,bufdc,0,0,SRCCOPY);
	
	}
	SelectObject(mdc,fullmap);
	BitBlt(hdc,0,0,cols*50,rows*50,mdc,0,0,SRCCOPY);
	// 主消息循环: 
	while (GetMessage(&msg, NULL, 0, 0))
	{
		if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}

	return (int) msg.wParam;
}



//
//  函数:  MyRegisterClass()
//
//  目的:  注册窗口类。
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
	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			= LoadIcon(hInstance, MAKEINTRESOURCE(IDI_CGPB_CHAPTER32));
	wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
	wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
	wcex.lpszMenuName	= MAKEINTRESOURCE(IDC_CGPB_CHAPTER32);
	wcex.lpszClassName	= szWindowClass;
	wcex.hIconSm		= LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

	return RegisterClassEx(&wcex);
}

//
//   函数:  InitInstance(HINSTANCE, int)
//
//   目的:  保存实例句柄并创建主窗口
//
//   注释: 
//
//        在此函数中，我们在全局变量中保存实例句柄并
//        创建和显示主程序窗口。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   hWnd;

   hInst = hInstance; // 将实例句柄存储在全局变量中

   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}

//
//  函数:  WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  目的:    处理主窗口的消息。
//
//  WM_COMMAND	- 处理应用程序菜单
//  WM_PAINT	- 绘制主窗口
//  WM_DESTROY	- 发送退出消息并返回
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	int wmId, wmEvent;
	PAINTSTRUCT ps;
	HDC hdc;

	switch (message)
	{
	case WM_COMMAND:
		wmId    = LOWORD(wParam);
		wmEvent = HIWORD(wParam);
		// 分析菜单选择: 
		switch (wmId)
		{
		case IDM_ABOUT:
			DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
			break;
		case IDM_EXIT:
			DestroyWindow(hWnd);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
		}
		break;
	case WM_PAINT:
		hdc = BeginPaint(hWnd, &ps);
		// TODO:  在此添加任意绘图代码...
		SelectObject(mdc, fullmap);
		BitBlt(hdc, 0, 0, cols * 50, rows * 50, mdc, 0, 0, SRCCOPY);
		EndPaint(hWnd, &ps);
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hWnd, message, wParam, lParam);
	}
	return 0;
}

// “关于”框的消息处理程序。
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	UNREFERENCED_PARAMETER(lParam);
	switch (message)
	{
	case WM_INITDIALOG:
		return (INT_PTR)TRUE;

	case WM_COMMAND:
		if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
		{
			EndDialog(hDlg, LOWORD(wParam));
			return (INT_PTR)TRUE;
		}
		break;
	}
	return (INT_PTR)FALSE;
}