【游戏程序设计】镂空贴图

镂空图:

【游戏程序设计】镂空贴图

运行结果:

【游戏程序设计】镂空贴图

源代码:

#include <windows.h>
#pragma comment(lib, "winmm.lib")									//调用PlaySound函数所需库文件t
#pragma comment(lib, "Msimg32.lib")									//调用TransparentBlt函数所需库文件

#define WINDOW_WIDTH 600
#define WINDOW_HEIGHT 450
#define WINDOW_TITLE L"镂空贴图"

HINSTANCE hInst;
HDC hdc;
HDC mdc;															//内存DC
HBITMAP hbmp;														//背景图片DC
HBITMAP hdra;														//角色图片DC
int  MyWindowClass(HINSTANCE);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
void MyDraw(HDC);

/*****************************************************************************************************************
在不同的应用程序中,在此处添加相关的全局变量
******************************************************************************************************************/
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPreInstace,
									LPSTR lpCmdLine, int nCmdShow) 
{
	MyWindowClass(hInstance);
	PlaySound(L"sound.wav", NULL, SND_FILENAME| SND_ASYNC| SND_LOOP);	//循环播放背景音乐
	if(!InitInstance(hInstance, nCmdShow))
		return FALSE;
	MSG msg;
	while(GetMessage(&msg, NULL, 0, 0)) 
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}

	return msg.wParam;
}

int MyWindowClass(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 = NULL;
	wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
	wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
	wcex.lpszMenuName = NULL;
	wcex.lpszClassName = L"gamebase";
	wcex.hIconSm = NULL;

	return RegisterClassEx(&wcex); 
}

BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
	hInst = hInstance;
	HWND hwnd = CreateWindow(L"gamebase", WINDOW_TITLE, WS_OVERLAPPEDWINDOW, 
		CW_USEDEFAULT, CW_USEDEFAULT, WINDOW_WIDTH, WINDOW_HEIGHT, NULL, NULL, hInstance, NULL);
	if(!hwnd)
		return FALSE;
	MoveWindow(hwnd, 10, 10, WINDOW_WIDTH, WINDOW_HEIGHT, true);
	ShowWindow(hwnd, nCmdShow);
	UpdateWindow(hwnd);

	hdc = GetDC(hwnd);
	//建立与窗口DC兼容的内存DC
	mdc = CreateCompatibleDC(hdc);
	//从文件中加载位图
	hbmp = (HBITMAP)LoadImage(NULL, L"bg.bmp", IMAGE_BITMAP, 600, 450, LR_LOADFROMFILE);
	hdra = (HBITMAP)LoadImage(NULL, L"dra.bmp", IMAGE_BITMAP, 100, 60, LR_LOADFROMFILE);
	MyDraw(hdc);
	ReleaseDC(hwnd, hdc);  
	return TRUE;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	PAINTSTRUCT ps;

	switch(message)
	{
	case WM_PAINT:
		hdc = BeginPaint(hwnd, &ps);
		MyDraw(hdc);
		EndPaint(hwnd, &ps);
		break;
/**************************************************************************************************************
在退出程序前,往往在此处删除创建的相关资源
***************************************************************************************************************/
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hwnd, message, wParam, lParam);
	}
	return 0;
}
/***************************************************************************************************************
在函数MyDraw()中进行相关绘制工作
****************************************************************************************************************/
void MyDraw(HDC hdc)
{
	SelectObject(mdc, hbmp);
	//将内存DC的内容映射到窗口DC
	BitBlt(hdc, 0, 0, 600, 450, mdc, 0, 0, SRCCOPY);

	SelectObject(mdc, hdra);
	//背景像素为白色(所有位为1) 黑色(所有位为0)
	//将蒙版中的每个像素与背景图对应的像素按位作漏极与运算
	//BitBlt(hdc, 200, 100, 50, 60, mdc, 50, 0, SRCAND);
	//将镂空图的每个像素与图中相应的像素按位作逻辑或运算
	//BitBlt(hdc, 200, 100, 50, 60, mdc, 0, 0, SRCPAINT);
	//方法二:用此函数完成镂空贴图
	TransparentBlt(hdc, 200, 100, 50, 60, mdc, 0, 0, 50, 60, RGB(0, 0, 0));
}