黑客屏保 代码来自网络搜索 做了部分改动

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#include "stdafx.h"
#include <windows.h>
#include <locale>
#include <exception>

#pragma comment (lib,"User32.lib")
#pragma comment (lib,"Gdi32.lib")

#define ID_TIMER 1
#define STRMAXLEN 19 //一个显示列的最大长度
#define STRMINLEN 8 //一个显示列的最小长度
#pragma comment ( linker, "/subsystem:windows /entry:mainCRTStartup" ) //去除启动或退出程序时黑框

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
//////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////

typedef struct tagCharColumn
{
TCHAR letters[STRMAXLEN];
int x, y, iStrLen; //显示列的开始显示的x,y坐标,iStrLen是这个列的长度
int iStopTimes, iMustStopTimes; //已经停滞的次数和必须停滞的次数,必须停滞的次数是随机的
}CharColumn, *pCharColumn;

TCHAR randomChar() //随机字符产生函数
{
return (TCHAR)(rand() % 255); //33到126之间
}

int init(CharColumn *cc, int cyScreen, int x) //初始化
{
static unsigned int t = 0;
int j;

cc->iStrLen = rand() % (STRMAXLEN - STRMINLEN) + STRMINLEN; //显示列的长度
for (int i = 0; i < cc->iStrLen; i++)
cc->letters[i] = randomChar();
cc->x = x + 3; //显示列的开始显示的x坐标
cc->y = rand() % 3 ? rand() % cyScreen : 0; //显示列的开始显示的y坐标
cc->iMustStopTimes = rand() % 6;
cc->iStopTimes = 0;

if (t % 5 == 0)
{
memcpy(cc->letters, _T(" 峰言 制作 "), sizeof(_T(" 峰言 制作 ")));
cc->iStrLen = sizeof(_T(" 峰言 制作 ")) / sizeof(TCHAR) - 1;
}

cc->letters[0] = randomChar();
t++;
return t;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
//ctn 用来确定一个显示链是否 向下前进,如果等待次数超过必须等待的次数,ctn就代表要向下前进
int i, j, temp, ctn; //j为一个显示链中除链表头外的在屏幕上显示的y坐标,temp绿色过度到黑色之用
static HDC hdcMem;
HFONT hFont;
static HBITMAP hBitmap;
static int cxScreen, cyScreen; //屏幕的宽度 高度.
static int iFontWidth = 19, iFontHeight = 22, iColumnCount; //字体的宽度 高度, 列数
static CharColumn *ccChain;

switch (message)
{
case WM_CREATE:
cxScreen = GetSystemMetrics(SM_CXSCREEN); //屏幕宽度
cyScreen = GetSystemMetrics(SM_CYSCREEN);
SetTimer(hwnd, ID_TIMER, 20, NULL);

hdc = GetDC(hwnd);
hdcMem = CreateCompatibleDC(hdc);
hBitmap = CreateCompatibleBitmap(hdc, cxScreen, cyScreen);
SelectObject(hdcMem, hBitmap);
ReleaseDC(hwnd, hdc);
//创建字体
hFont = CreateFont(iFontHeight, iFontWidth - 5, 0, 0, FW_BOLD, 0, 0, 0,
DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
DRAFT_QUALITY, FIXED_PITCH | FF_SWISS, TEXT("Consolas"));
SelectObject(hdcMem, hFont);
DeleteObject(hFont);
SetBkMode(hdcMem, TRANSPARENT); //设置背景模式为 透明
iColumnCount = cxScreen / (iFontWidth * 3 / 2); //屏幕所显示字母雨的列数

ccChain = (pCharColumn)calloc(iColumnCount, sizeof(CharColumn));
for (i = 0; i < iColumnCount; i++)
{
init(ccChain + i, cyScreen, (iFontWidth * 3 / 2)*i);
}

return 0;
case WM_TIMER:
hdc = GetDC(hwnd);
PatBlt(hdcMem, 0, 0, cxScreen, cyScreen, BLACKNESS); //将内存设备映像刷成黑色
for (i = 0; i < iColumnCount; i++)
{
int letterIndex = 0;
ctn = ccChain[i].iStopTimes++ > ccChain[i].iMustStopTimes;

SetTextColor(hdcMem, RGB(255, 255, 255));
TextOut(hdcMem, ccChain[i].x, ccChain[i].y, &(ccChain[i].letters[letterIndex]), 1);
j = (ccChain + i)->y;
letterIndex++;
//遍历整个显示列,将这个显示列里的字符从下往上显示
temp = 0; //temp绿色过度到黑色之用
while (letterIndex < ccChain[i].iStrLen)
{
SetTextColor(hdcMem, RGB(0, 255 - (255 * (temp++) / (ccChain + i)->iStrLen), 0));
TextOut(hdcMem, (ccChain + i)->x, j -= iFontHeight, &((ccChain + i)->letters[letterIndex]), 1);
letterIndex++;
}
if (ctn)
(ccChain + i)->iStopTimes = 0;
else continue;

(ccChain + i)->y += iFontHeight; //下次开始显示的y坐标 为当前的y坐标加上 一个字符的高度
//如果开始显示的y坐标减去 整个显示列的长度超过了屏幕的高度
if ((ccChain + i)->y - (ccChain + i)->iStrLen*iFontHeight > cyScreen)
{
init(ccChain + i, cyScreen, (iFontWidth * 3 / 2)*i);
}
//链表的头 为此链表的前个元素,因为下次开始显示的时候 就相当与在整个显示列的开头添加个元素,然后在开始往上显示
(ccChain + i)->letters[0] = randomChar();
}

BitBlt(hdc, 0, 0, cxScreen, cyScreen, hdcMem, 0, 0, SRCCOPY);
ReleaseDC(hwnd, hdc);
return 0;

//处理善后工作
case WM_KEYDOWN:
case WM_LBUTTONDOWN:
case WM_DESTROY:
KillTimer(hwnd, ID_TIMER);
DeleteObject(hBitmap);
DeleteDC(hdcMem);
free(ccChain);
PostQuitMessage(0);
return 0;
}

return DefWindowProc(hwnd, message, wParam, lParam);

}

int main(HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
std::locale::global(std::locale(""));
setlocale(LC_CTYPE, "");
static TCHAR szAppName[] = TEXT("matrix");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;

wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;

wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;

if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("此程序必须运行在NT下!"), szAppName, MB_ICONERROR);
return 0;
}

hwnd = CreateWindow(szAppName, NULL,
WS_DLGFRAME | WS_THICKFRAME | WS_POPUP,
0, 0,
GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN),
NULL, NULL, hInstance,
NULL);

ShowWindow(hwnd, SW_SHOWMAXIMIZED); //最大化显示
UpdateWindow(hwnd);
ShowCursor(FALSE); //隐藏鼠标光标

srand((int)GetCurrentTime()); //初始化随机数发生器
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
ShowCursor(TRUE); //显示鼠标光标
return msg.wParam;
}

黑客屏保 代码来自网络搜索 做了部分改动

标签：

原文地址：http://www.cnblogs.com/itdef/p/5685711.html