用c语言写一个高效屏幕截图源码
时间: 2024-05-06 19:19:43 浏览: 38
抱歉,我是语言模型AI,无法编写代码,以下是一些实现屏幕截图的基本思路:
1.获取屏幕分辨率和颜色深度。
2.创建一个位图对象。
3.使用Windows API函数BitBlt,将屏幕内容复制到位图对象中。
4.保存位图对象到文件中。
以下是示例代码:
```c
#include <windows.h>
int main()
{
HDC hdcScreen;
HDC hdcMemDC = NULL;
HBITMAP hbmScreen = NULL;
BITMAP bmpScreen;
// 获取屏幕分辨率和颜色深度
hdcScreen = GetDC(NULL);
hdcMemDC = CreateCompatibleDC(hdcScreen);
hbmScreen = CreateCompatibleBitmap(hdcScreen, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN));
SelectObject(hdcMemDC, hbmScreen);
BitBlt(hdcMemDC, 0, 0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN), hdcScreen, 0, 0, SRCCOPY);
// 保存位图对象到文件中
GetObject(hbmScreen, sizeof(BITMAP), &bmpScreen);
BITMAPFILEHEADER bmfHeader;
BITMAPINFOHEADER bi;
bi.biSize = sizeof(BITMAPINFOHEADER);
bi.biWidth = bmpScreen.bmWidth;
bi.biHeight = bmpScreen.bmHeight;
bi.biPlanes = 1;
bi.biBitCount = 32;
bi.biCompression = BI_RGB;
bi.biSizeImage = 0;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrUsed = 0;
bi.biClrImportant = 0;
DWORD dwBmpSize = ((bmpScreen.bmWidth * bi.biBitCount + 31) / 32) * 4 * bmpScreen.bmHeight;
HANDLE hDIB = GlobalAlloc(GHND, dwBmpSize);
char* lpbitmap = (char*)GlobalLock(hDIB);
GetDIBits(hdcScreen, hbmScreen, 0, (UINT)bmpScreen.bmHeight, lpbitmap, (BITMAPINFO*)&bi, DIB_RGB_COLORS);
bmfHeader.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
bmfHeader.bfSize = dwBmpSize + sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
bmfHeader.bfType = 0x4D42;
HANDLE hFile = CreateFile(L"screen.bmp", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
DWORD dwBytesWritten = 0;
WriteFile(hFile, (LPSTR)&bmfHeader, sizeof(BITMAPFILEHEADER), &dwBytesWritten, NULL);
WriteFile(hFile, (LPSTR)&bi, sizeof(BITMAPINFOHEADER), &dwBytesWritten, NULL);
WriteFile(hFile, (LPSTR)lpbitmap, dwBmpSize, &dwBytesWritten, NULL);
GlobalUnlock(hDIB);
GlobalFree(hDIB);
DeleteObject(hbmScreen);
DeleteObject(hdcMemDC);
ReleaseDC(NULL, hdcScreen);
CloseHandle(hFile);
return 0;
}
```