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本帖最后由 无符号整形 于 2016-6-19 20:09 编辑
这个截屏器简单又粗糙，还有一个小bug，但是它也许能让你研究很久。哈哈~
好吧直接上图上代码，有个小bug，请仔细观察。
很粗糙吧！
截图效果：
发现bug了吧。。。还有那个小安仔，还挺好玩的:-)
代码：
- #include <windows.h>
- #include "resource.h"
- LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); //声明用来处理消息的函数
- HBITMAP CaptureScreen(LPRECT);
- BOOL SaveBmp(HBITMAP, const char*);
- HINSTANCE g_hInstance;
- int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
- {
- static TCHAR szAppName[] = TEXT("MyWindow");
- HWND hwnd;
- MSG msg;
- WNDCLASS wndclass; //声明一个窗口类对象
-
- HMENU hMenu = CreateMenu();
- HMENU hMenuPopup = CreateMenu();
- AppendMenu(hMenuPopup, MF_STRING, 100, "截屏");
- AppendMenu(hMenuPopup, MF_STRING, 101, "另存为");
- AppendMenu(hMenuPopup, MF_STRING, 103, "延时3秒并截屏");
- AppendMenu(hMenu, MF_POPUP, (ULONG_PTR)hMenuPopup, "截屏");
- //以下为窗口类对象wndclass的属性
- wndclass.style = CS_HREDRAW | CS_VREDRAW; //窗口样式
- wndclass.lpszClassName = szAppName; //窗口类名
- wndclass.lpszMenuName = NULL; //窗口菜单:无
- wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); //窗口背景颜色
- wndclass.lpfnWndProc = WndProc; //窗口处理函数
- wndclass.cbWndExtra = 0; //窗口实例扩展:无
- wndclass.cbClsExtra = 0; //窗口类扩展:无
- wndclass.hInstance = hInstance; //窗口实例句柄
- wndclass.hIcon = LoadIcon(hInstance,MAKEINTRESOURCE(IDI_ICON1)); //窗口最小化图标:使用缺省图标
- wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); //窗口采用箭头光标
- if (!RegisterClass(&wndclass))
- { //注册窗口类, 如果注册失败弹出错误提示
- MessageBox(NULL, TEXT("窗口注册失败!"), TEXT("错误"), MB_OK | MB_ICONERROR);
- return 0;
- }
- hwnd = CreateWindow( //创建窗口
- szAppName, //窗口类名
- TEXT("截图工具"), //窗口标题
- WS_OVERLAPPEDWINDOW, //窗口的风格
- CW_USEDEFAULT, //窗口初始显示位置x:使用缺省值
- CW_USEDEFAULT, //窗口初始显示位置y:使用缺省值
- 400, //窗口的宽度:使用缺省值
- 100, //窗口的高度:使用缺省值
- NULL, //父窗口:无
- hMenu, //子菜单:无
- hInstance, //该窗口应用程序的实例句柄
- NULL //
- );
- g_hInstance = hInstance;
- ShowWindow(hwnd, iCmdShow); //显示窗口
- UpdateWindow(hwnd); //更新窗口
- while (GetMessage(&msg, NULL, 0, 0)) //从消息队列中获取消息
- {
- TranslateMessage(&msg); //将虚拟键消息转换为字符消息
- DispatchMessage(&msg); //分发到回调函数(过程函数)
- }
- return msg.wParam;
- }
- LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
- {
- HDC hdc, hdcMem;
- static RECT rect;
- static HBITMAP hBitmap;
- static int cx,cy;
- BITMAP bitmap;
- static OPENFILENAME ofn;
- static TCHAR szBuffer[1000] = "";
- static LONG xPos, yPos;
- PAINTSTRUCT ps;
- ofn.lStructSize = sizeof(OPENFILENAME);
- ofn.lpstrFilter = "bmp";
- ofn.lpstrInitialDir = NULL;
- ofn.lpstrFile = szBuffer;
- ofn.nMaxFile = sizeof(szBuffer) / sizeof(*szBuffer);
- ofn.nFilterIndex = 0;
- ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_EXPLORER;
- switch (message) //处理得到的消息
- {
- case WM_COMMAND:
- switch (LOWORD(wParam))
- {
- case 100:
- SetCursor(LoadCursor(g_hInstance, IDC_WAIT));
- MoveWindow(hwnd, 0, 0, 0, 0, 0);
- ShowWindow(hwnd, SW_HIDE);
- hBitmap = CaptureScreen(NULL);
- ShowWindow(hwnd, SW_SHOW);
- SetCursor(LoadCursor(g_hInstance, IDC_ARROW));
- MoveWindow(hwnd, 0, 0, 400, 100, 0);
- MessageBox(hwnd, "已经成功截图", "提醒", MB_OK | MB_ICONINFORMATION );
- if (!GetSaveFileName(&ofn))
- return 0;
- SaveBmp(hBitmap, szBuffer);
- break;
- case 101:
- if (!GetSaveFileName(&ofn))
- return 0;
- SaveBmp(hBitmap, szBuffer);
- break;
- case 103:
- Sleep(3000);
- SetCursor(LoadCursor(g_hInstance, IDC_WAIT));
- ShowWindow(hwnd, SW_HIDE);
- hBitmap = CaptureScreen(NULL);
- ShowWindow(hwnd, SW_SHOW);
- SetCursor(LoadCursor(g_hInstance, IDC_ARROW));
- MessageBox(hwnd, "已经成功截图", "提醒", MB_OK | MB_ICONINFORMATION);
- if (!GetSaveFileName(&ofn))
- return 0;
- SaveBmp(hBitmap, szBuffer);
- }
- return 0;
- case WM_PAINT:
- hdc = BeginPaint(hwnd, &ps);
- hdcMem = CreateCompatibleDC(hdc);
- SelectObject(hdcMem, hBitmap);
- GetObject(hBitmap, sizeof(BITMAP), &bitmap);
- cx = bitmap.bmWidth;
- cy = bitmap.bmHeight;
- BitBlt(hdcMem, 10, 10, cx, cy, hdc, 0, 0, SRCCOPY);
- EndPaint(hwnd, &ps);
- return 0;
- case WM_DESTROY:
- DeleteObject(hBitmap);
- PostQuitMessage(0);
- return 0;
- }
- return DefWindowProc(hwnd, message, wParam, lParam);
- }
- #ifndef CAPTUREBLT
- #define CAPTUREBLT 0x40000000
- #endif
- HBITMAP CaptureScreen(LPRECT lpRect)//lpRect为NULL时表示全屏幕截图
- {
- Sleep(1000);
- HDC hdc, hdcMem;
- HBITMAP hemfCopy;
- HWND hwndScr;
- int dstcx, dstcy;
- if (lpRect)
- {
- dstcx = lpRect->right - lpRect->left;
- dstcy = lpRect->bottom - lpRect->top;
- }
- else
- {
- dstcx = GetSystemMetrics(SM_CXSCREEN);
- dstcy = GetSystemMetrics(SM_CYSCREEN);
- }
- if (LockWindowUpdate(hwndScr = GetDesktopWindow()))
- {
- hdc = GetDCEx(hwndScr, NULL, DCX_CACHE | DCX_LOCKWINDOWUPDATE);
- hdcMem = CreateCompatibleDC(hdc);
- if (NULL == hdcMem)
- {
- ReleaseDC(hwndScr, hdc);
- LockWindowUpdate(NULL);
- return NULL;
- }
- hemfCopy = CreateCompatibleBitmap(hdc, abs(dstcx), abs(dstcy));
- if (NULL == hemfCopy)
- {
- DeleteDC(hdcMem);
- ReleaseDC(hwndScr, hdc);
- LockWindowUpdate(NULL);
- return NULL;
- }
- SelectObject(hdcMem, hemfCopy);
- if (lpRect)
- StretchBlt(hdcMem, 0, 0, abs(dstcx), abs(dstcy),
- hdc, lpRect->left, lpRect->top, dstcx, dstcy, SRCCOPY | CAPTUREBLT);
- else
- BitBlt(hdcMem, 0, 0, dstcx, dstcy,
- hdc, 0, 0, SRCCOPY | CAPTUREBLT);
- DeleteDC(hdcMem);
- ReleaseDC(hwndScr, hdc);
- LockWindowUpdate(NULL);
- return hemfCopy;
- }
- return NULL;
- }
- BOOL SaveBmp(HBITMAP hBitmap, const char *FileName)
- {
- HDC hDC;
- //当前分辨率下每象素所占字节数
- int iBits;
- //位图中每象素所占字节数
- WORD wBitCount;
- //定义调色板大小， 位图中像素字节大小 ，位图文件大小 ， 写入文件字节数
- DWORD dwPaletteSize = 0, dwBmBitsSize = 0, dwDIBSize = 0, dwWritten = 0;
- //位图属性结构
- BITMAP Bitmap;
- //位图文件头结构
- BITMAPFILEHEADER bmfHdr;
- //位图信息头结构
- BITMAPINFOHEADER bi;
- //指向位图信息头结构
- LPBITMAPINFOHEADER lpbi;
- //定义文件，分配内存句柄，调色板句柄
- HANDLE fh, hDib, hPal, hOldPal = NULL;
- //计算位图文件每个像素所占字节数
- hDC = CreateDC("DISPLAY", NULL, NULL, NULL);
- iBits = GetDeviceCaps(hDC, BITSPIXEL) *GetDeviceCaps(hDC, PLANES);
- DeleteDC(hDC);
- if (iBits <= 1)
- {
- wBitCount = 1;
- }
- else if (iBits <= 4)
- {
- wBitCount = 4;
- }
- else if (iBits <= 8)
- {
- wBitCount = 8;
- }
- else
- {
- wBitCount = 24;
- }
- GetObject(hBitmap, sizeof(Bitmap), (LPSTR)&Bitmap);
- bi.biSize = sizeof(BITMAPINFOHEADER);
- bi.biWidth = Bitmap.bmWidth;
- bi.biHeight = Bitmap.bmHeight;
- bi.biPlanes = 1;
- bi.biBitCount = wBitCount;
- bi.biCompression = BI_RGB;
- bi.biSizeImage = 0;
- bi.biXPelsPerMeter = 0;
- bi.biYPelsPerMeter = 0;
- bi.biClrImportant = 0;
- bi.biClrUsed = 0;
- dwBmBitsSize = ((Bitmap.bmWidth * wBitCount + 31) / 32) * 4 * Bitmap.bmHeight;
- //为位图内容分配内存
- hDib = GlobalAlloc(GHND, dwBmBitsSize + dwPaletteSize + sizeof(BITMAPINFOHEADER));
- lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDib);
- *lpbi = bi;
- // 处理调色板
- hPal = GetStockObject(DEFAULT_PALETTE);
- if (hPal)
- {
- hDC = GetDC(NULL);
- hOldPal = SelectPalette(hDC, (HPALETTE)hPal, FALSE);
- RealizePalette(hDC);
- }
- // 获取该调色板下新的像素值
- GetDIBits(hDC,
- hBitmap,
- 0,
- (UINT)Bitmap.bmHeight,
- (LPSTR)lpbi + sizeof(BITMAPINFOHEADER)+dwPaletteSize,
- (BITMAPINFO *)lpbi,
- DIB_RGB_COLORS);
- //恢复调色板
- if (hOldPal)
- {
- SelectPalette(hDC, (HPALETTE)hOldPal, TRUE);
- RealizePalette(hDC);
- ReleaseDC(NULL, hDC);
- }
- //创建位图文件
- fh = CreateFile(FileName,
- GENERIC_WRITE,
- 0,
- NULL,
- CREATE_ALWAYS,
- FILE_ATTRIBUTE_NORMAL,
- NULL);/* FILE_FLAG_SEQUENTIAL_SCAN, NULL); */
- if (fh == INVALID_HANDLE_VALUE)
- {
- return FALSE;
- }
- // 设置位图文件头
- bmfHdr.bfType = 0x4D42; // "BM"
- dwDIBSize = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+dwPaletteSize + dwBmBitsSize;
- bmfHdr.bfSize = dwDIBSize;
- bmfHdr.bfReserved1 = 0;
- bmfHdr.bfReserved2 = 0;
- bmfHdr.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER)+(DWORD)sizeof(BITMAPINFOHEADER)+dwPaletteSize;
- // 写入位图文件头
- WriteFile(fh, (LPSTR)&bmfHdr, sizeof(BITMAPFILEHEADER), &dwWritten, NULL);
- // 写入位图文件其余内容
- WriteFile(fh, (LPSTR)lpbi, dwDIBSize, &dwWritten, NULL);
- //清除
- GlobalUnlock(hDib);
- GlobalFree(hDib);
- CloseHandle(fh);
- return TRUE;
- }
最激动人心的附件来啦！！！！！！！
截图工具.zip
(88.46 KB, 下载次数: 37)
今天省下来3次上传机会，因为我是新鱼油~ 
好吧888888888 |
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