000
25.02.2006, 19:23 Uhr
~Amazer0th
Gast
|
Hallo!
Ich habe hier ein Programm aus mehreren zusammengeschnitten. Es sollte ein Screenshot machen und als BMP speichern, aber es funktioniert nicht.. könnt ihr mir helfen?
| C++: |
/*screen capture example*/
#include <windows.h>
#include <fstream>
#include <stdio.h>
#include <wingdi.h>
#include <fstream.h>
#define SCREENWIDTH GetSystemMetrics(SM_CXSCREEN)
#define SCREENHEIGHT GetSystemMetrics(SM_CYSCREEN)
HBITMAP g_hDeskBmp;
HDC g_hMemDC;
int g_nDCdata;
int main()
{
/*capture desktop and store for later use*/
HDC hdcDesk;
hdcDesk=GetDC(HWND_DESKTOP); /*equivalent to hdcDesk=GetDC((HWND)0);*/
g_hMemDC=CreateCompatibleDC(0);
g_hDeskBmp=CreateCompatibleBitmap(hdcDesk, SCREENWIDTH, SCREENHEIGHT);
/*fill the bitmap with contents of desktop*/
g_nDCdata=SaveDC(g_hMemDC);
SelectObject(g_hMemDC,g_hDeskBmp);
BitBlt(g_hMemDC, 0, 0, SCREENWIDTH, SCREENHEIGHT,hdcDesk,0,0,SRCCOPY);
//......................................................................................
// create the BMP file
// create output file
ofstream bmpfile("d:\\filename.bmp");
// save bitmap file header
BITMAPFILEHEADER fileHeader;
fileHeader.bfType = 0x4d42;
fileHeader.bfSize = 0;
fileHeader.bfReserved1 = 0;
fileHeader.bfReserved2 = 0;
fileHeader.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
if(!bmpfile.write((char*)&fileHeader, sizeof(fileHeader)))
return 0;
// save bitmap info header
BITMAPINFOHEADER infoHeader;
infoHeader.biSize = sizeof(infoHeader);
infoHeader.biWidth = 800;
infoHeader.biHeight = 600;
infoHeader.biPlanes = 1;
infoHeader.biBitCount = 32;
infoHeader.biCompression = BI_RGB;
infoHeader.biSizeImage = 0;
infoHeader.biXPelsPerMeter = 0;
infoHeader.biYPelsPerMeter = 0;
infoHeader.biClrUsed = 0;
infoHeader.biClrImportant = 0;
if(!bmpfile.write((char*)&infoHeader, sizeof(infoHeader)))
return 0;
// save color table (sample used here is 8-bit grayscale)
if(infoHeader.biBitCount == 8) {
RGBQUAD table[256];
for(size_t i = 0; i < 256; i++)
table[i].rgbRed = table[i].rgbGreen = table[i].rgbBlue = (BYTE)i;
if(!bmpfile.write((char*)table, 256*sizeof(RGBQUAD)))
return 0;
}
else if(infoHeader.biBitCount == 4) {
// 16 colors
}
else if(infoHeader.biBitCount == 1) {
// only two colors (doesn't necessarily have to be always black and white!)
}
// save bitmap data
if(!bmpfile.write((char*)&hdcDesk, sizeof(hdcDesk)))
return 0;
ReleaseDC(HWND_DESKTOP,hdcDesk);
RestoreDC(g_hMemDC,g_nDCdata);
DeleteDC(g_hMemDC);
DeleteObject(g_hDeskBmp);
// close the file
return 0;
//......................................................................................
}
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Dieser Post wurde am 25.02.2006 um 20:07 Uhr von Pablo editiert. |
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