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我試圖讓這個屏幕截圖程序工作(下圖),它將屏幕圖像保存爲bmp文件,當我嘗試使用gcc編譯它時,出現以下錯誤:屏幕截圖程序編譯問題
/tmp/ccetmoRd.o:Screenshot.c:(.text+0x128):未定義參考[email protected]' /tmp/ccetmoRd.o:Screenshot.c:(.text+0x1e1): undefined reference to
_GetDIBits @ 28' collect2:LD返回1退出狀態
任何想法,爲什麼這可能是?
非常感謝。
代碼:
#include <stdlib.h>
#include <windows.h>
#include <stdio.h>
void TakeScreenShot(char* filename);
int main()
{
TakeScreenShot("c:\\Screenshot.bmp");
return 0;
}
//
// Side Effects:N/A
//
//This code is copyrighted and has// limited warranties.Please see http://
// www.Planet-Source-Code.com/vb/scripts/Sh
// owCode.asp?txtCodeId=10754&lngWId=3//for details.//**************************************
//
void TakeScreenShot(char* filename)
{
keybd_event(VK_SNAPSHOT, 0x45, KEYEVENTF_EXTENDEDKEY, 0);
keybd_event(VK_SNAPSHOT, 0x45, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
HBITMAP h;
OpenClipboard(NULL);
h = (HBITMAP)GetClipboardData(CF_BITMAP);
CloseClipboard();
HDC hdc=NULL;
FILE*fp=NULL;
LPVOID pBuf=NULL;
BITMAPINFO bmpInfo;
BITMAPFILEHEADER bmpFileHeader;
do
{
hdc=GetDC(NULL);
ZeroMemory(&bmpInfo,sizeof(BITMAPINFO));
bmpInfo.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
GetDIBits(hdc,h,0,0,NULL,&bmpInfo,DIB_RGB_COLORS);
if(bmpInfo.bmiHeader.biSizeImage<=0)
bmpInfo.bmiHeader.biSizeImage=bmpInfo.bmiHeader.biWidth*abs(bmpInfo.bmiHeader.biHeight)*(bmpInfo.bmiHeader.biBitCount+7)/8;
if((pBuf = malloc(bmpInfo.bmiHeader.biSizeImage))==NULL)
{
MessageBox(NULL, "Unable to Allocate Bitmap Memory", "Error", MB_OK|MB_ICONERROR);
break;
}
bmpInfo.bmiHeader.biCompression=BI_RGB;
GetDIBits(hdc,h,0,bmpInfo.bmiHeader.biHeight,pBuf, &bmpInfo, DIB_RGB_COLORS);
if((fp = fopen(filename,"wb"))==NULL)
{
MessageBox(NULL, "Unable to Create Bitmap File", "Error", MB_OK|MB_ICONERROR);
break;
}
bmpFileHeader.bfReserved1=0;
bmpFileHeader.bfReserved2=0;
bmpFileHeader.bfSize=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+bmpInfo.bmiHeader.biSizeImage;
bmpFileHeader.bfType='MB';
bmpFileHeader.bfOffBits=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER);
fwrite(&bmpFileHeader,sizeof(BITMAPFILEHEADER),1,fp);
fwrite(&bmpInfo.bmiHeader,sizeof(BITMAPINFOHEADER),1,fp);
fwrite(pBuf,bmpInfo.bmiHeader.biSizeImage,1,fp);
}
while(0);
if(hdc)
ReleaseDC(NULL,hdc);
if(pBuf)
free(pBuf);
if(fp)
fclose(fp);
}
你在Windows上編譯? –
嘗試將'-lgdi32'傳遞給鏈接器? – jweyrich
編譯使用的cygwin – Jeremy