黑客帝国之酷炫屏保数字雨

来源：互联网发布：蒙泰初始化端口编辑：程序博客网时间：2024/04/26 02:52
本程序vs2013 测试通过，不排除其他测试通过用例，主要是windows API的应用
#include <windows.h> #define ID_TIMER    1 #define STRMAXLEN  25 //一个显示列的最大长度 #define STRMINLEN  8  //一个显示列的最小长度 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////// typedef struct tagCharChain //整个当作屏幕的一个显示列,这是个双向列表 {    struct tagCharChain *prev; //链表的前个元素     TCHAR  ch;                  //一个显示列中的一个字符     struct tagCharChain *next; //链表的后个元素 }CharChain, *pCharChain;typedef struct tagCharColumn{    CharChain *head, *current, *point;    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;int main(HINSTANCE hInstance, HINSTANCE hPrevInstance,                                    PSTR szCmdLine, int iCmdShow){    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;}TCHAR randomChar() //随机字符产生函数 {    return (TCHAR)(rand() % (126 - 33) + 33); //33到126之间 }int init(CharColumn *cc, int cyScreen, int x) //初始化 {    int j;    cc->iStrLen = rand() % (STRMAXLEN - STRMINLEN) + STRMINLEN;     cc->x = x + 3;          cc->y = rand() % 3 ? rand() % cyScreen : 0;    cc->iStopTimes = 0;    cc->head = cc->current =        (pCharChain)calloc(cc->iStrLen, sizeof(CharChain));     for (j = 0; j < cc->iStrLen - 1; j++)    {        cc->current->prev = cc->point; //cc->point一个显示列的前个元素         cc->current->ch = '\0';        cc->current->next = cc->current + 1; //cc->current+1一个显示列的后个元素         cc->point = cc->current++; //cc->point = cc->current; cc->current++;     }    cc->current->prev = cc->point; //最后一个节点     cc->current->ch = '\0';    cc->current->next = cc->head;    cc->head->prev = cc->current; //头节点的前一个为此链的最后一个元素     cc->current = cc->point = cc->head; //free掉申请的内存要用current当参数     cc->head->ch = randomChar(); // 对链表头的 元素填充     return 0;}LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){    HDC          hdc;    int i, j, temp, ctn;     static  HDC hdcMem;    HFONT    hFont;    static  HBITMAP hBitmap;    static  int cxScreen, cyScreen; //屏幕的宽度 高度.     static  int iFontWidth = 10, iFontHeight = 15, 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, 10, 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("Fixedsys"));        SelectObject(hdcMem, hFont);        DeleteObject(hFont);        SetBkMode(hdcMem, TRANSPARENT); //设置背景模式为 透明         iColumnCount = cxScreen / (iFontWidth * 1 / 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++)        {            ctn = (ccChain + i)->iStopTimes++ > (ccChain + i)->iMustStopTimes;            //             (ccChain + i)->point = (ccChain + i)->head; //point用于遍历整个显示列             //第一个字符显示为绿             SetTextColor(hdcMem, RGB(0, 255, 0));            TextOut(hdcMem, (ccChain + i)->x, (ccChain + i)->y, &((ccChain + i)->point->ch), 1);            j = (ccChain + i)->y;            (ccChain + i)->point = (ccChain + i)->point->next;            //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 ((ccChain + i)->point != (ccChain + i)->head && (ccChain + i)->point->ch)            {                SetTextColor(hdcMem, RGB(0, 255 - (255 * (temp++) / (ccChain + i)->iStrLen), 0));                TextOut(hdcMem, (ccChain + i)->x, j -= iFontHeight, &((ccChain + i)->point->ch), 1);                (ccChain + i)->point = (ccChain + i)->point->next;            }            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)            {                free((ccChain + i)->current);                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)->head = (ccChain + i)->head->prev;            (ccChain + i)->head->ch = randomChar();        }        BitBlt(hdc, 0, 0, cxScreen, cyScreen, hdcMem, 0, 0, SRCCOPY);        ReleaseDC(hwnd, hdc);        return 0;    case WM_RBUTTONDOWN:        KillTimer(hwnd, ID_TIMER);        return 0;    case WM_RBUTTONUP:        SetTimer(hwnd, ID_TIMER, 10, NULL);        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);        for (i = 0; i < iColumnCount; i++)        {            free((ccChain + i)->current);        }        free(ccChain);        PostQuitMessage(0);        return 0;    }    return DefWindowProc(hwnd, message, wParam, lParam);}
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