screenshot
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ich war schon länger auf der suche nach einen code der mir einen screenshot macht und die .bmp abspeichert.
#include <windows.h> #include <iostream> #include <stdio.h> #include <stdlib.h> #include <conio.h> using namespace std; PBITMAPINFO CreateBitmapInfoStruct(HWND hwnd, HBITMAP hBmp) { BITMAP bmp; PBITMAPINFO pbmi; WORD cClrBits; // Retrieve the bitmap color format, width, and height. if (!GetObject(hBmp, sizeof(BITMAP), (LPSTR)&bmp)) printf("GetObject", hwnd); // Convert the color format to a count of bits. cClrBits = (WORD)(bmp.bmPlanes * bmp.bmBitsPixel); if (cClrBits == 1) cClrBits = 1; else if (cClrBits <= 4) cClrBits = 4; else if (cClrBits <= 8) cClrBits = 8; else if (cClrBits <= 16) cClrBits = 16; else if (cClrBits <= 24) cClrBits = 24; else cClrBits = 32; // Allocate memory for the BITMAPINFO structure. (This structure // contains a BITMAPINFOHEADER structure and an array of RGBQUAD // data structures.) if (cClrBits != 24) pbmi = (PBITMAPINFO) LocalAlloc(LPTR, sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * (1<< cClrBits)); // There is no RGBQUAD array for the 24-bit-per-pixel format. else pbmi = (PBITMAPINFO) LocalAlloc(LPTR, sizeof(BITMAPINFOHEADER)); // Initialize the fields in the BITMAPINFO structure. pbmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); pbmi->bmiHeader.biWidth = bmp.bmWidth; pbmi->bmiHeader.biHeight = bmp.bmHeight; pbmi->bmiHeader.biPlanes = bmp.bmPlanes; pbmi->bmiHeader.biBitCount = bmp.bmBitsPixel; if (cClrBits < 24) pbmi->bmiHeader.biClrUsed = (1<<cClrBits); // If the bitmap is not compressed, set the BI_RGB flag. pbmi->bmiHeader.biCompression = BI_RGB; // Compute the number of bytes in the array of color // indices and store the result in biSizeImage. // For Windows NT, the width must be DWORD aligned unless // the bitmap is RLE compressed. This example shows this. // For Windows 95/98/Me, the width must be WORD aligned unless the // bitmap is RLE compressed. pbmi->bmiHeader.biSizeImage = ((pbmi->bmiHeader.biWidth * cClrBits +31) & ~31) /8 * pbmi->bmiHeader.biHeight; // Set biClrImportant to 0, indicating that all of the // device colors are important. pbmi->bmiHeader.biClrImportant = 0; return pbmi; } void CreateBMPFile(HWND hwnd, LPTSTR pszFile, PBITMAPINFO pbi,HBITMAP hBMP, HDC hDC) { HANDLE hf; // file handle BITMAPFILEHEADER hdr; // bitmap file-header PBITMAPINFOHEADER pbih; // bitmap info-header LPBYTE lpBits; // memory pointer DWORD dwTotal; // total count of bytes DWORD cb; // incremental count of bytes BYTE *hp; // byte pointer DWORD dwTmp; pbih = (PBITMAPINFOHEADER) pbi; lpBits = (LPBYTE) GlobalAlloc(GMEM_FIXED, pbih->biSizeImage); if (!lpBits) printf("GlobalAlloc", hwnd); // Retrieve the color table (RGBQUAD array) and the bits // (array of palette indices) from the DIB. if (!GetDIBits(hDC, hBMP, 0, (WORD) pbih->biHeight, lpBits, pbi, DIB_RGB_COLORS)) { printf("GetDIBits", hwnd); } // Create the .BMP file. hf = CreateFile(pszFile, GENERIC_READ | GENERIC_WRITE, (DWORD) 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, (HANDLE) NULL); if (hf == INVALID_HANDLE_VALUE) printf("CreateFile", hwnd); hdr.bfType = 0x4d42; // 0x42 = "B" 0x4d = "M" // Compute the size of the entire file. hdr.bfSize = (DWORD) (sizeof(BITMAPFILEHEADER) + pbih->biSize + pbih->biClrUsed * sizeof(RGBQUAD) + pbih->biSizeImage); hdr.bfReserved1 = 0; hdr.bfReserved2 = 0; // Compute the offset to the array of color indices. hdr.bfOffBits = (DWORD) sizeof(BITMAPFILEHEADER) + pbih->biSize + pbih->biClrUsed * sizeof (RGBQUAD); // Copy the BITMAPFILEHEADER into the .BMP file. if (!WriteFile(hf, (LPVOID) &hdr, sizeof(BITMAPFILEHEADER), (LPDWORD) &dwTmp, NULL)) { printf("WriteFile", hwnd); } // Copy the BITMAPINFOHEADER and RGBQUAD array into the file. if (!WriteFile(hf, (LPVOID) pbih, sizeof(BITMAPINFOHEADER) + pbih->biClrUsed * sizeof (RGBQUAD), (LPDWORD) &dwTmp, ( NULL))) printf("WriteFile", hwnd); // Copy the array of color indices into the .BMP file. dwTotal = cb = pbih->biSizeImage; hp = lpBits; if (!WriteFile(hf, (LPSTR) hp, (int) cb, (LPDWORD) &dwTmp,NULL)) printf("WriteFile", hwnd); // Close the .BMP file. if (!CloseHandle(hf)) printf("CloseHandle", hwnd); // Free memory. GlobalFree((HGLOBAL)lpBits); } int main() { HDC hdcScreen, hdcCompatible,hdc; HBITMAP hbmScreen; HWND hwnd = 0; BITMAP bmp; hdcScreen = CreateDC("DISPLAY", NULL, NULL, NULL); hdcCompatible = CreateCompatibleDC(hdcScreen); // Create a compatible bitmap for hdcScreen. hbmScreen = CreateCompatibleBitmap(hdcScreen, GetDeviceCaps(hdcScreen, HORZRES), GetDeviceCaps(hdcScreen, VERTRES)); if (hbmScreen == 0) printf("hbmScreen", NULL); // Select the bitmaps into the compatible DC. if (!SelectObject(hdcCompatible, hbmScreen)) printf("Compatible Bitmap Selection", NULL); // Hide the application window. ShowWindow(hwnd, SW_HIDE); //Copy color data for the entire display into a //bitmap that is selected into a compatible DC. if (!BitBlt(hdcCompatible, 0,0, bmp.bmWidth, bmp.bmHeight, hdcScreen, 0,0, SRCCOPY)) printf("Screen to Compat Blt Failed", hwnd); // Redraw the application window. ShowWindow(hwnd, SW_SHOW); SelectObject(hdcCompatible, hbmScreen); // Gerätekontext auswählen // ShowWindow(hwnd, SW_HIDE); BitBlt(hdcCompatible, 0,0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN), hdcScreen, 0,0, SRCCOPY); //ShowWindow(hwnd, SW_SHOW); //CreateBMPFile aus Ms-Internet-Hilfe hdcScreen = CreateDC("DISPLAY", NULL, NULL, NULL); hdcCompatible = CreateCompatibleDC(hdcScreen); // Create a compatible bitmap for hdcScreen. hbmScreen = CreateCompatibleBitmap(hdcScreen, GetDeviceCaps(hdcScreen, HORZRES), GetDeviceCaps(hdcScreen, VERTRES)); if (hbmScreen == 0) printf("hbmScreen", hwnd); // Select the bitmaps into the compatible DC. if (!SelectObject(hdcCompatible, hbmScreen)) printf("Compatible Bitmap Selection", hwnd); // Hide the application window. ShowWindow(hwnd, SW_HIDE); //Copy color data for the entire display into a //bitmap that is selected into a compatible DC. if (!BitBlt(hdcCompatible, 0,0, bmp.bmWidth, bmp.bmHeight, hdcScreen, 0,0, SRCCOPY)) printf("Screen to Compat Blt Failed", hwnd); // Redraw the application window. ShowWindow(hwnd, SW_SHOW); //-- Storing an Image -- //CreateBMPFile(hwnd, "D:\\Screenshot\\TestBild.bmp", ????, hbmScreen, hdc); BITMAPINFO pbi = CreateBitmapInfoStruct( 0, hbmScreen); //Error 1: conversion from `tagBITMAPINFO*' to non-scalar type `tagBITMAPINFO' requested CreateBMPFile(NULL, "C:\\Screenshot\\TestBild.bmp", pbi, hbmScreen, hdc); //Error 2: cannot convert `BITMAPINFO' to `tagBITMAPINFO*' for argument `3' to `void CreateBMPFile(HWND__*, TCHAR*, tagBITMAPINFO*, HBITMAP__*, HDC__*)' }
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Hättest du mal hier im Forum gesucht, sowas gibt's hier nämlich schon. Außerdem ist das WinAPI.
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Dieser Thread wurde von Moderator/in HumeSikkins aus dem Forum C++ in das Forum WinAPI verschoben.
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