screen shot en C

Bonjour,

Je débute en langage C et je souhaite réaliser une application qui me permet de faire un screen shot sur un autre PC.
Le principe est le suivant:
- je lance serveur.exe sur un poste
- de mon poste je lance client.exe
- lorsque je clique sur le bouton screen shot, il fait une capture d'écran du poste serveur et l'enregistre dans le meme répertoire qu'ou se trouve client.exe

voici les codes des 2 programmes

Client.exe

Code:

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#include <stdlib.h> #include <string.h> #include <gtk/gtk.h> #include <glib/gprintf.h> #include <winsock.h>     #define IP_SERVEUR "192.168.51.33" #define PORT_SERVEUR 4000   void Quit_appli(GtkWidget *pButton, gpointer data); void Connection(GtkWidget *pButton, gpointer data); void Deconnection(GtkWidget *pButton, gpointer data);   static GtkWidget *p_table; static GtkWidget *p_window; SOCKET sock;   int main(int argc, char **argv) { GtkWidget *p_image_fond; GtkWidget *p_menu; GtkWidget *pLabel; GtkWidget *BtnOk; GtkWidget *p_button_connect; GtkWidget *p_button_image_connect; GtkWidget *p_button_deconnect; GtkWidget *p_button_image_deconnect; GtkWidget *p_button_quit; GtkWidget *p_button_image_quit; GList *list = NULL; gint i;   /* Initialisation de GTK+ */ gtk_init (&argc, &argv);   /* Creation de la fenetre */ p_window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_window_set_decorated (GTK_WINDOW(p_window), FALSE); /* Fenetre sans bordure */ gtk_window_set_position(GTK_WINDOW(p_window), GTK_WIN_POS_CENTER); g_signal_connect (G_OBJECT (p_window), "destroy", G_CALLBACK(gtk_main_quit), NULL);   /* Creation de la table */ p_table = gtk_table_new (100, 100, FALSE); gtk_container_add (GTK_CONTAINER (p_window), p_table);   /* Creation du boutton Quitter */ p_button_quit = gtk_button_new(); p_button_image_quit = gtk_image_new_from_stock(GTK_STOCK_QUIT, GTK_ICON_SIZE_BUTTON); gtk_container_add(GTK_CONTAINER(p_button_quit), p_button_image_quit); gtk_table_attach_defaults (GTK_TABLE (p_table), p_button_quit, 90, 97, 90, 97); g_signal_connect(G_OBJECT(p_button_quit), "clicked", G_CALLBACK(Quit_appli), (GtkWidget*) p_window);   /* Creation du boutton Connection */ p_button_connect = gtk_button_new(); p_button_image_connect = gtk_image_new_from_stock(GTK_STOCK_CLEAR, GTK_ICON_SIZE_BUTTON); gtk_container_add(GTK_CONTAINER(p_button_connect), p_button_image_connect); gtk_table_attach_defaults (GTK_TABLE (p_table), p_button_connect, 90, 97, 3, 10); g_signal_connect(G_OBJECT(p_button_connect), "clicked", G_CALLBACK(Connection), (GtkWidget*) p_window);   /* Creation du boutton Deconnection */ p_button_deconnect = gtk_button_new(); p_button_image_deconnect = gtk_image_new_from_stock(GTK_STOCK_PRINT, GTK_ICON_SIZE_BUTTON); gtk_container_add(GTK_CONTAINER(p_button_deconnect), p_button_image_deconnect); gtk_table_attach_defaults (GTK_TABLE (p_table), p_button_deconnect, 90, 97, 15, 22); g_signal_connect(G_OBJECT(p_button_deconnect), "clicked", G_CALLBACK(Deconnection), (GtkWidget*) p_window);   /* Creation de l'arriere plan */ p_image_fond = gtk_image_new_from_file ("C:/image/gtk.png"); gtk_table_attach_defaults (GTK_TABLE (p_table), p_image_fond, 0, 100, 0, 100);   /* Affichage de la fenetre */ gtk_widget_show_all (p_window);   /* Lancement de la boucle evenementielle */ gtk_main();   return EXIT_SUCCESS; }     /* Fonction confirmation quitter application */ void Quit_appli(GtkWidget* widget, gpointer data) { GtkWidget *pQuestion;   /* Creation de la boite de message */ pQuestion = gtk_message_dialog_new (GTK_WINDOW(data), GTK_DIALOG_MODAL, GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO, "Voulez vous vraiment\nquitter ce programme?");   /* Affichage et attente d une reponse */ switch(gtk_dialog_run(GTK_DIALOG(pQuestion))) { case GTK_RESPONSE_YES: /* OUI -> on quitte l application */ send(sock, "DECO", 4, 0); closesocket(sock); gtk_main_quit(); break; case GTK_RESPONSE_NO: /* NON -> on detruit la boite de message */ gtk_widget_destroy(pQuestion); break; } }   void Connection(GtkWidget* widget, gpointer data) { WSADATA WSAData; SOCKADDR_IN sinfo; int Etat; int nb = 0; int nbr = 0; GtkWidget *pAbout; GtkWidget *pLabel; char buf[4096]; FILE *bmp;   WSAStartup(MAKEWORD(2,0),&WSAData); sock=socket(AF_INET,SOCK_STREAM,0); if (sock==INVALID_SOCKET) { pAbout = gtk_message_dialog_new (GTK_WINDOW(data), GTK_DIALOG_MODAL, GTK_MESSAGE_INFO, GTK_BUTTONS_OK, "Erreur: Creation socket impossible", NULL); gtk_dialog_run(GTK_DIALOG(pAbout)); gtk_widget_destroy(pAbout); }   sinfo.sin_addr.s_addr = inet_addr(IP_SERVEUR); sinfo.sin_family = AF_INET; sinfo.sin_port = htons(PORT_SERVEUR);   Etat=connect(sock,(LPSOCKADDR)&sinfo,sizeof(sinfo)); if (Etat==SOCKET_ERROR) { pAbout = gtk_message_dialog_new (GTK_WINDOW(data), GTK_DIALOG_MODAL, GTK_MESSAGE_INFO, GTK_BUTTONS_OK, "Erreur: Connection au serveur impossible", NULL); gtk_dialog_run(GTK_DIALOG(pAbout)); gtk_widget_destroy(pAbout); }   else { pAbout = gtk_message_dialog_new (GTK_WINDOW(data), GTK_DIALOG_MODAL, GTK_MESSAGE_INFO, GTK_BUTTONS_OK, "Good: Connection etablie", NULL); gtk_dialog_run(GTK_DIALOG(pAbout)); gtk_widget_destroy(pAbout); }   send(sock, "begin", 7, 0); recv(sock, buf, sizeof(buf), 0); send(sock, "begin", 7, 0); bmp = fopen("shoots.bmp", "r");   int taille = atoi(buf); while(nb < taille) { nbr = recv(sock, buf, sizeof(buf), 0); fwrite(buf, nbr, 4096, bmp);   nb += nbr; } fclose(bmp); HBITMAP bit = (HBITMAP) LoadImage(0,"shoot.bmp",IMAGE_BITMAP,0,0,LR_LOADFROMFILE); }   void Deconnection(GtkWidget *pButton, gpointer data) { GtkWidget *pAbout1;   send(sock, "DECO", 4, 0); closesocket(sock); pAbout1 = gtk_message_dialog_new (GTK_WINDOW(data), GTK_DIALOG_MODAL, GTK_MESSAGE_INFO, GTK_BUTTONS_OK, "Good: Deconnection etablie", NULL); gtk_dialog_run(GTK_DIALOG(pAbout1)); gtk_widget_destroy(pAbout1); }

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Code:

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/**************************  * Includes  *  **************************/   #include <windows.h> #include <gl/gl.h> #include <stdio.h> #include <stdlib.h>   /**************************  * Fonctions  *  **************************/   DWORD WINAPI serveur_colonel_connection(LPVOID lpParameter); SOCKET server_connection(unsigned short portnum); BOOL WriteDIB(LPTSTR szFile, HANDLE hDIB);     /***********************/ /* Convertion d'un DDB en DIB */ /***********************/   HANDLE DDBToDIB(HBITMAP bitmap, DWORD dwCompression, HPALETTE pPal) { BITMAP bm; BITMAPINFOHEADER bi; LPBITMAPINFOHEADER lpbi; DWORD dwLen; HANDLE hDIB; HANDLE handle; HDC hDC; HPALETTE hPal;   // The function has no arg for bitfields if(dwCompression == BI_BITFIELDS) return NULL;   // If a palette has not been supplied use defaul palette hPal = (HPALETTE) pPal; if(hPal == NULL) hPal = (HPALETTE) GetStockObject(DEFAULT_PALETTE);   // Get bitmap information GetObject(bitmap, sizeof(bm), (LPSTR)&bm);   // Initialize the bitmapinfoheader bi.biSize = sizeof(BITMAPINFOHEADER); bi.biWidth = bm.bmWidth; bi.biHeight = bm.bmHeight; bi.biPlanes = 1; bi.biBitCount = 8; bi.biCompression = dwCompression; bi.biSizeImage = 0; bi.biXPelsPerMeter = 0; bi.biYPelsPerMeter = 0; bi.biClrUsed = 0; bi.biClrImportant = 0;   // Compute the size of the infoheader and the color table int nColors = (1 << bi.biBitCount); if(nColors > 256) nColors = 0; dwLen = bi.biSize + nColors * sizeof(RGBQUAD);   // We need a device context to get the DIB from hDC = GetDC(NULL); hPal = SelectPalette(hDC,hPal,FALSE); RealizePalette(hDC);   // Allocate enough memory to hold bitmapinfoheader and color table hDIB = GlobalAlloc(GMEM_FIXED,dwLen);   if(!hDIB) { SelectPalette(hDC,hPal,FALSE); ReleaseDC(NULL,hDC); return NULL; }   lpbi = (LPBITMAPINFOHEADER)hDIB;   *lpbi = bi;   // Call GetDIBits with a NULL lpBits param, so the device driver // will calculate the biSizeImage field GetDIBits(hDC, (HBITMAP)bitmap, 0L, (DWORD)bi.biHeight, (LPBYTE)NULL, (LPBITMAPINFO)lpbi, (DWORD)DIB_RGB_COLORS);   bi = *lpbi;   // If the driver did not fill in the biSizeImage field, then compute it // Each scan line of the image is aligned on a DWORD (32bit) boundary if(bi.biSizeImage == 0) { bi.biSizeImage = ((((bi.biWidth * bi.biBitCount) + 31) & ~31) / 8) * bi.biHeight;   // If a compression scheme is used the result may infact be larger // Increase the size to account for this. if(dwCompression != BI_RGB) bi.biSizeImage = (bi.biSizeImage * 3) / 2; }   // Realloc the buffer so that it can hold all the bits dwLen += bi.biSizeImage;   if(handle = GlobalReAlloc(hDIB, dwLen, GMEM_MOVEABLE)) hDIB = handle;   else { GlobalFree(hDIB);   // Reselect the original palette SelectPalette(hDC,hPal,FALSE); ReleaseDC(NULL,hDC); return NULL; }   // Get the bitmap bits lpbi = (LPBITMAPINFOHEADER)hDIB;   // FINALLY get the DIB BOOL bGotBits = GetDIBits(hDC, (HBITMAP)bitmap, 0L, // Start scan line (DWORD)bi.biHeight, // # of scan lines (LPBYTE)lpbi // address for bitmap bits + (bi.biSize + nColors * sizeof(RGBQUAD)), (LPBITMAPINFO)lpbi, // address of bitmapinfo (DWORD)DIB_RGB_COLORS); // Use RGB for color table   if(!bGotBits) { GlobalFree(hDIB);   SelectPalette(hDC,hPal,FALSE); ReleaseDC(NULL,hDC); return NULL; }   SelectPalette(hDC,hPal,FALSE); ReleaseDC(NULL,hDC); return hDIB; }     /************************/ /* Ecriture du DIB sur le disque */ /************************/   BOOL WriteDIB(LPTSTR szFile, HANDLE hDIB) { BITMAPFILEHEADER hdr; LPBITMAPINFOHEADER lpbi;   if (!hDIB) return FALSE;   FILE *File; File = fopen(szFile, "ab"); DWORD ff = GetLastError();   lpbi = (LPBITMAPINFOHEADER)hDIB;   int nColors = 1 << lpbi->biBitCount;   // Fill in the fields of the file header hdr.bfType = ((WORD) ('M' << 8) | 'B'); hdr.bfSize = GlobalSize (hDIB) + sizeof( hdr ); hdr.bfReserved1 = 0; hdr.bfReserved2 = 0; hdr.bfOffBits = (DWORD) (sizeof( hdr ) + lpbi->biSize + nColors * sizeof(RGBQUAD));   // Write the file header fwrite(&hdr, sizeof(hdr), 1, File);   // Write the DIB header and the bits fwrite(lpbi, GlobalSize(hDIB), 1, File);   fclose(File); return TRUE; }     /**********************/ /* Création d'un screen shot */ /**********************/   DWORD WINAPI serveur_colonel_connection(LPVOID lpParameter) { char buf[4096]; SOCKET new_sock; FILE *bmp; new_sock = (SOCKET)lpParameter; if(new_sock == INVALID_SOCKET) { fprintf(stderr, "Error waiting for new connection!\n"); exit(1); } else { while(1) { memset(buf, 0, sizeof(buf)); recv(new_sock, buf, sizeof(buf), 0); if (strstr(buf, "DECO") != 0) { break; } remove("shoots.bmp"); SaveDesktopAsFile("shoots.bmp"); bmp = fopen("shoots.bmp", "r");   fseek(bmp, 0, SEEK_END); int taillei = ftell(bmp); fseek(bmp, 0, SEEK_SET); itoa(taillei, (char *)buf, 10); send(new_sock, buf, strlen(buf), 0); recv(new_sock, buf, sizeof(buf), 0); if (strstr(buf, "DECO") != 0) { break; } int i; i = fread(buf, 4096, 4096, bmp); while(i != 0) { send(new_sock, buf, i, 0); fread(buf, 4096, 4096, bmp); } fclose(bmp); } } closesocket(new_sock); return(0); }     /********************/ /* Connection au serveur */ /********************/   SOCKET server_connection(unsigned short portnum) { char myname[256] = "loopback"; SOCKET s; struct sockaddr_in sa; struct hostent *hp; memset(&sa, 0, sizeof(struct sockaddr_in)); gethostname(myname, sizeof(myname)); hp = gethostbyname(myname); if (hp == NULL) return(INVALID_SOCKET); sa.sin_family = hp->h_addrtype; sa.sin_port = htons(portnum); s = socket(AF_INET, SOCK_STREAM, 0); if (s == INVALID_SOCKET) return INVALID_SOCKET;   if (bind(s, (struct sockaddr *)&sa, sizeof(struct sockaddr_in)) == SOCKET_ERROR) { closesocket(s); return(INVALID_SOCKET); } listen(s, 5); return(s); }     /**********************************/ /* Sauvegarde du screenshot dans un fichier */ /**********************************/   int SaveDesktopAsFile(LPTSTR szFile) { HWND pWnd = GetDesktopWindow(); HBITMAP bitmap; HDC dc = GetDC(pWnd); HDC memDC; RECT rect;   memDC = CreateCompatibleDC(dc); GetWindowRect(pWnd, &rect); bitmap = CreateCompatibleBitmap(dc,640, 480); HBITMAP pOldBitmap = (HBITMAP)SelectObject(memDC, bitmap); StretchBlt(memDC, 0, 0,640, 480, dc , 0, 0, rect.right-rect.left, rect.bottom-rect.top, SRCCOPY); HPALETTE pal;   UINT nSize = sizeof(LOGPALETTE) + (sizeof(PALETTEENTRY) * 256); LOGPALETTE *pLP = (LOGPALETTE *) malloc (nSize); pLP->palVersion = 0x300;   pLP->palNumEntries = GetSystemPaletteEntries( dc, 0, 255, pLP->palPalEntry );   pal = CreatePalette(pLP); free (pLP);   HANDLE hDIB = DDBToDIB( bitmap, BI_RLE8, pal );   if( hDIB == NULL ) return FALSE;   SelectObject(memDC, pOldBitmap); WriteDIB(szFile, hDIB);   GlobalFree(hDIB); return TRUE; }     /**************************  * Programme Principal  *  **************************/   int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow) { WSADATA wsa; WORD wVersionRequested; HANDLE ServeurThread; SOCKET ss;   wVersionRequested = MAKEWORD( 2, 0 ); if (WSAStartup(wVersionRequested , &wsa)!=0) { printf("Winsock Initialization failed.\n"); return -1; }   if ((ss = server_connection(4000)) == INVALID_SOCKET) { printf("La connection a échoué !!!"); exit(1); } for (;;) { SOCKET new_sock = accept(ss, NULL, NULL); ServeurThread = CreateThread (NULL, 0, serveur_colonel_connection, (LPVOID)new_sock, 0, NULL); } return 0; }   int Ftaille(int A) { lseek(A,0,2); int tf= tell(A); lseek(A,0,0); return tf; }

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le code client utilise la libraire GTK.

Il y a quelques petites choses qui ne sont pas au point et c'est la que je demande de l'aide.
- le screen shot est réaliser mais il s'enregistre dans le répertoire du serveur.exe et non pas celui du client.exe
- apres avoir fait un screen shot, le programme se fige, on ne peut plus rien faire, ni faire un autre screen shot ni meme quitter l'application.

Quelles modifications doit-je apporter pour remédier a cela?

Merci pour votre aide ++

Client:

Citation:

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send(sock, "begin", 7, 0);

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"begin" fait 6 caractères avec le zéro final.

Citation:

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bmp = fopen("shoots.bmp", "r");

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Tu vas écrire dans bmp, donc faut l'ouvrir en mode écriture (binaire).

Citation:

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fwrite(buf, nbr, 4096, bmp);

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Là tu écris nbr*4096 octets dans bmp, tu es sûr?

Citation:

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LoadImage(0,"shoot.bmp"

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Manque un 's'.

Serveur:

Citation:

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bmp = fopen("shoots.bmp", "r");

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shoots.bmp est un fichier binaire, donc lecture binaire.

Citation:

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int i;
i = fread(buf, 4096, 4096, bmp);
while(i != 0)
{
send(new_sock, buf, i, 0);
fread(buf, 4096, 4096, bmp);
}

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Tu lui demandes de lire 4096*4096 octets..

Tu ne modifies pas i dans la boucle.

merci de ton aide, j'ai apporter les 2 premiere modification que tu m'a donné, et mon programme ne marche plus, je me suis donc arreter la!!!!