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-rw-r--r--libvncclient/vncviewer.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/libvncclient/vncviewer.c b/libvncclient/vncviewer.c
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+++ b/libvncclient/vncviewer.c
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+/*
+ * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+/*
+ * vncviewer.c - the Xt-based VNC viewer.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <rfb/rfbclient.h>
+
+static void Dummy(rfbClient* client) {
+}
+static Bool DummyPoint(rfbClient* client, int x, int y) {
+ return TRUE;
+}
+static void DummyRect(rfbClient* client, int x, int y, int w, int h) {
+}
+static char* NoPassword(rfbClient* client) {
+ return "";
+}
+static Bool MallocFrameBuffer(rfbClient* client) {
+ if(client->frameBuffer)
+ free(client->frameBuffer);
+ client->frameBuffer=malloc(client->width*client->height*client->format.bitsPerPixel/8);
+ return client->frameBuffer?TRUE:FALSE;
+}
+
+rfbClient* rfbGetClient(int* argc,char** argv,
+ int bitsPerSample,int samplesPerPixel,
+ int bytesPerPixel) {
+ rfbClient* client=(rfbClient*)calloc(sizeof(rfbClient),1);
+ client->programName = argv[0];
+ client->endianTest = 1;
+
+ client->format.bitsPerPixel = bytesPerPixel*8;
+ client->format.depth = bitsPerSample*samplesPerPixel;
+ client->format.bigEndian = *(char *)&client->endianTest?FALSE:TRUE;
+ client->format.trueColour = TRUE;
+
+ if (client->format.bitsPerPixel == 8) {
+ client->format.redMax = 7;
+ client->format.greenMax = 7;
+ client->format.blueMax = 3;
+ client->format.redShift = 0;
+ client->format.greenShift = 3;
+ client->format.blueShift = 6;
+ } else {
+ client->format.redMax = (1 << bitsPerSample) - 1;
+ client->format.greenMax = (1 << bitsPerSample) - 1;
+ client->format.blueMax = (1 << bitsPerSample) - 1;
+ if(!client->format.bigEndian) {
+ client->format.redShift = 0;
+ client->format.greenShift = bitsPerSample;
+ client->format.blueShift = bitsPerSample * 2;
+ } else {
+ if(client->format.bitsPerPixel==8*3) {
+ client->format.redShift = bitsPerSample*2;
+ client->format.greenShift = bitsPerSample*1;
+ client->format.blueShift = 0;
+ } else {
+ client->format.redShift = bitsPerSample*3;
+ client->format.greenShift = bitsPerSample*2;
+ client->format.blueShift = bitsPerSample;
+ }
+ }
+ }
+
+ client->HandleCursorPos = DummyPoint;
+ client->SoftCursorLockArea = DummyRect;
+ client->SoftCursorUnlockScreen = Dummy;
+ client->FramebufferUpdateReceived = DummyRect;
+ client->GetPassword = NoPassword;
+ client->MallocFrameBuffer = MallocFrameBuffer;
+ client->Bell = Dummy;
+
+ return client;
+}
+
+void PrintRect(rfbClient* client, int x, int y, int w, int h) {
+ fprintf(stderr,"Received an update for %d,%d,%d,%d.\n",x,y,w,h);
+}
+
+void SaveFramebufferAsPGM(rfbClient* client, int x, int y, int w, int h) {
+ static time_t t=0,t1;
+ FILE* f;
+ int i,j;
+ int bpp=client->format.bitsPerPixel/8;
+ int row_stride=client->width*bpp;
+
+ /* save one picture only if the last is older than 2 seconds */
+ t1=time(0);
+ if(t1-t>2)
+ t=t1;
+ else
+ return;
+
+ /* assert bpp=4 */
+ if(bpp!=4) {
+ fprintf(stderr,"bpp = %d (!=4)\n",bpp);
+ return;
+ }
+
+ f=fopen("/tmp/framebuffer.ppm","wb");
+
+ fprintf(f,"P6\n# %s\n%d %d\n255\n",client->desktopName,client->width,client->height);
+ for(j=0;j<client->height*row_stride;j+=row_stride)
+ for(i=0;i<client->width*bpp;i+=bpp) {
+ if(client->format.bigEndian) {
+ fputc(client->frameBuffer[j+i+bpp-1],f);
+ fputc(client->frameBuffer[j+i+bpp-2],f);
+ fputc(client->frameBuffer[j+i+bpp-3],f);
+ } else {
+ fputc(client->frameBuffer[j+i+bpp+0],f);
+ fputc(client->frameBuffer[j+i+bpp+1],f);
+ fputc(client->frameBuffer[j+i+bpp+2],f);
+ }
+ }
+ fclose(f);
+}
+
+void
+vncEncryptBytes(unsigned char *bytes, char *passwd);
+
+int
+main(int argc, char **argv)
+{
+ int i;
+ rfbClient* client = rfbGetClient(&argc,argv,8,3,4);
+ const char* vncServerHost="";
+ int vncServerPort=5900;
+
+ char buf1[]="pass",buf2[]="pass";
+ vncEncryptBytes(buf1,buf2);
+
+ client->FramebufferUpdateReceived = PrintRect;
+ client->FramebufferUpdateReceived = SaveFramebufferAsPGM;
+
+ /* The -listen option is used to make us a daemon process which listens for
+ incoming connections from servers, rather than actively connecting to a
+ given server. The -tunnel and -via options are useful to create
+ connections tunneled via SSH port forwarding. We must test for the
+ -listen option before invoking any Xt functions - this is because we use
+ forking, and Xt doesn't seem to cope with forking very well. For -listen
+ option, when a successful incoming connection has been accepted,
+ listenForIncomingConnections() returns, setting the listenSpecified
+ flag. */
+
+ for (i = 1; i < argc; i++) {
+ if (strcmp(argv[i], "-listen") == 0) {
+ listenForIncomingConnections(client);
+ break;
+ } else {
+ char* colon=strchr(argv[i],':');
+
+ vncServerHost=argv[i];
+ if(colon) {
+ *colon=0;
+ vncServerPort=atoi(colon+1);
+ } else
+ vncServerPort=0;
+ vncServerPort+=5900;
+ }
+
+ /* TODO:
+ if (strcmp(argv[i], "-tunnel") == 0 || strcmp(argv[i], "-via") == 0) {
+ if (!createTunnel(&argc, argv, i))
+ exit(1);
+ break;
+ }
+ */
+ }
+
+ /* Call the main Xt initialisation function. It parses command-line options,
+ generating appropriate resource specs, and makes a connection to the X
+ display. */
+
+ /* TODO: cmdline args
+ toplevel = XtVaAppInitialize(&appContext, "Vncviewer",
+ cmdLineOptions, numCmdLineOptions,
+ &argc, argv, fallback_resources,
+ XtNborderWidth, 0, NULL);
+
+ dpy = XtDisplay(toplevel);
+ */
+
+ /* Interpret resource specs and process any remaining command-line arguments
+ (i.e. the VNC server name). If the server name isn't specified on the
+ command line, getArgsAndResources() will pop up a dialog box and wait
+ for one to be entered. */
+
+ /*
+ GetArgsAndResources(argc, argv);
+ */
+
+ /* Unless we accepted an incoming connection, make a TCP connection to the
+ given VNC server */
+
+ if (!client->listenSpecified) {
+ if (!ConnectToRFBServer(client,vncServerHost, vncServerPort)) exit(1);
+ }
+
+ /* Initialise the VNC connection, including reading the password */
+
+ if (!InitialiseRFBConnection(client)) exit(1);
+
+ SetFormatAndEncodings(client);
+
+ client->width=client->si.framebufferWidth;
+ client->height=client->si.framebufferHeight;
+ client->MallocFrameBuffer(client);
+ SendFramebufferUpdateRequest(client,0,0,client->width,client->height,FALSE);
+
+ /* Now enter the main loop, processing VNC messages. X events will
+ automatically be processed whenever the VNC connection is idle. */
+
+ while (1) {
+ if (!HandleRFBServerMessage(client))
+ break;
+ }
+
+ return 0;
+}
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