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+/*
+ *
+ * This is an example of how to use libvncserver.
+ *
+ * libvncserver example
+ * Copyright (C) 2001 Johannes E. Schindelin <[email protected]>
+ *
+ * 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.
+ */
+
+#ifdef WIN32
+#define sleep Sleep
+#else
+#include <unistd.h>
+#endif
+
+#ifdef __IRIX__
+#include <netdb.h>
+#endif
+
+#include "rfb.h"
+#include "keysym.h"
+
+const int maxx=640, maxy=480, bpp=4;
+/* TODO: odd maxx doesn't work (vncviewer bug) */
+
+/* This initializes a nice (?) background */
+
+void initBuffer(unsigned char* buffer)
+{
+ int i,j;
+ for(j=0;j<maxy;++j) {
+ for(i=0;i<maxx;++i) {
+ buffer[(j*maxx+i)*bpp+0]=(i+j)*128/(maxx+maxy); /* red */
+ buffer[(j*maxx+i)*bpp+1]=i*128/maxx; /* green */
+ buffer[(j*maxx+i)*bpp+2]=j*256/maxy; /* blue */
+ }
+ buffer[j*maxx*bpp+0]=0xff;
+ buffer[j*maxx*bpp+1]=0xff;
+ buffer[j*maxx*bpp+2]=0xff;
+ buffer[j*maxx*bpp+3]=0xff;
+ }
+}
+
+/* Here we create a structure so that every client has it's own pointer */
+
+typedef struct ClientData {
+ Bool oldButton;
+ int oldx,oldy;
+} ClientData;
+
+void clientgone(rfbClientPtr cl)
+{
+ free(cl->clientData);
+}
+
+enum rfbNewClientAction newclient(rfbClientPtr cl)
+{
+ cl->clientData = (void*)calloc(sizeof(ClientData),1);
+ cl->clientGoneHook = clientgone;
+ return RFB_CLIENT_ACCEPT;
+}
+
+/* aux function to draw a line */
+
+void drawline(unsigned char* buffer,int rowstride,int bpp,int x1,int y1,int x2,int y2)
+{
+ int i,j;
+ i=x1-x2; j=y1-y2;
+ if(i==0 && j==0) {
+ for(i=0;i<bpp;i++)
+ buffer[y1*rowstride+x1*bpp+i]=0xff;
+ return;
+ }
+ if(i<0) i=-i;
+ if(j<0) j=-j;
+ if(i<j) {
+ if(y1>y2) { i=y2; y2=y1; y1=i; i=x2; x2=x1; x1=i; }
+ if(y2==y1) { if(y2>0) y1--; else y2++; }
+ for(j=y1;j<=y2;j++)
+ for(i=0;i<bpp;i++)
+ buffer[j*rowstride+(x1+(j-y1)*(x2-x1)/(y2-y1))*bpp+i]=0xff;
+ } else {
+ if(x1>x2) { i=y2; y2=y1; y1=i; i=x2; x2=x1; x1=i; }
+ for(i=x1;i<=x2;i++)
+ for(j=0;j<bpp;j++)
+ buffer[(y1+(i-x1)*(y2-y1)/(x2-x1))*rowstride+i*bpp+j]=0xff;
+ }
+}
+
+/* Here the pointer events are handled */
+
+void doptr(int buttonMask,int x,int y,rfbClientPtr cl)
+{
+ ClientData* cd=cl->clientData;
+
+ if(cl->screen->cursorIsDrawn)
+ rfbUndrawCursor(cl->screen);
+
+ if(x>=0 && y>=0 && x<maxx && y<maxy) {
+ if(buttonMask) {
+ int i,j,x1,x2,y1,y2;
+
+ if(cd->oldButton==buttonMask) { /* draw a line */
+ drawline(cl->screen->frameBuffer,cl->screen->paddedWidthInBytes,bpp,
+ x,y,cd->oldx,cd->oldy);
+ rfbMarkRectAsModified(cl->screen,x,y,cd->oldx,cd->oldy);
+ } else { /* draw a point (diameter depends on button) */
+ int w=cl->screen->paddedWidthInBytes;
+ x1=x-buttonMask; if(x1<0) x1=0;
+ x2=x+buttonMask; if(x2>maxx) x2=maxx;
+ y1=y-buttonMask; if(y1<0) y1=0;
+ y2=y+buttonMask; if(y2>maxy) y2=maxy;
+
+ for(i=x1*bpp;i<x2*bpp;i++)
+ for(j=y1;j<y2;j++)
+ cl->screen->frameBuffer[j*w+i]=(char)0xff;
+ rfbMarkRectAsModified(cl->screen,x1,y1,x2-1,y2-1);
+ }
+
+ /* we could get a selection like that:
+ rfbGotXCutText(cl->screen,"Hallo",5);
+ */
+ } else
+ cd->oldButton=0;
+
+ cd->oldx=x; cd->oldy=y; cd->oldButton=buttonMask;
+ }
+ defaultPtrAddEvent(buttonMask,x,y,cl);
+}
+
+/* aux function to draw a character to x, y */
+
+#include "radon.h"
+
+/* Here the key events are handled */
+
+void dokey(Bool down,KeySym key,rfbClientPtr cl)
+{
+ if(down) {
+ if(key==XK_Escape)
+ rfbCloseClient(cl);
+ else if(key==XK_Page_Up) {
+ if(cl->screen->cursorIsDrawn)
+ rfbUndrawCursor(cl->screen);
+ initBuffer(cl->screen->frameBuffer);
+ rfbMarkRectAsModified(cl->screen,0,0,maxx,maxy);
+ } else if(key>=' ' && key<0x100) {
+ ClientData* cd=cl->clientData;
+ int x1=cd->oldx,y1=cd->oldy,x2,y2;
+ if(cl->screen->cursorIsDrawn)
+ rfbUndrawCursor(cl->screen);
+ cd->oldx+=rfbDrawChar(cl->screen,&radonFont,cd->oldx,cd->oldy,(char)key,0x00ffffff);
+ rfbFontBBox(&radonFont,(char)key,&x1,&y1,&x2,&y2);
+ rfbMarkRectAsModified(cl->screen,x1,y1,x2-1,y2-1);
+ }
+ }
+}
+
+/* Example for an XCursor (foreground/background only) */
+
+int exampleXCursorWidth=9,exampleXCursorHeight=7;
+char exampleXCursor[]=
+ " "
+ " xx xx "
+ " xx xx "
+ " xxx "
+ " xx xx "
+ " xx xx "
+ " ";
+
+/* Example for a rich cursor (full-colour) */
+
+void MakeRichCursor(rfbScreenInfoPtr rfbScreen)
+{
+ int i,j,w=32,h=32;
+ rfbCursorPtr c = rfbScreen->cursor;
+ char bitmap[]=
+ " "
+ " xxxxxx "
+ " xxxxxxxxxxxxxxxxx "
+ " xxxxxxxxxxxxxxxxxxxxxx "
+ " xxxxx xxxxxxxx xxxxxxxx "
+ " xxxxxxxxxxxxxxxxxxxxxxxxxxx "
+ " xxxxxxxxxxxxxxxxxxxxxxxxxxxxx "
+ " xxxxx xxxxxxxxxxx xxxxxxx "
+ " xxxx xxxxxxxxx xxxxxx "
+ " xxxxx xxxxxxxxxxx xxxxxxx "
+ " xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx "
+ " xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx "
+ " xxxxxxxxxxxx xxxxxxxxxxxxxxx "
+ " xxxxxxxxxxxxxxxxxxxxxxxxxxxx "
+ " xxxxxxxxxxxxxxxxxxxxxxxxxxxx "
+ " xxxxxxxxxxx xxxxxxxxxxxxxx "
+ " xxxxxxxxxx xxxxxxxxxxxx "
+ " xxxxxxxxx xxxxxxxxx "
+ " xxxxxxxxxx xxxxxxxxx "
+ " xxxxxxxxxxxxxxxxxxx "
+ " xxxxxxxxxxxxxxxxxxx "
+ " xxxxxxxxxxxxxxxxxxx "
+ " xxxxxxxxxxxxxxxxx "
+ " xxxxxxxxxxxxxxx "
+ " xxxx xxxxxxxxxxxxx "
+ " xx x xxxxxxxxxxx "
+ " xxx xxxxxxxxxxx "
+ " xxxx xxxxxxxxxxx "
+ " xxxxxx xxxxxxxxxxxx "
+ " xxxxxxxxxxxxxxxxxxxxxx "
+ " xxxxxxxxxxxxxxxx "
+ " ";
+ c=rfbScreen->cursor = rfbMakeXCursor(w,h,bitmap,bitmap);
+ c->xhot = 16; c->yhot = 24;
+
+ c->richSource = malloc(w*h*bpp);
+ for(j=0;j<h;j++) {
+ for(i=0;i<w;i++) {
+ c->richSource[j*w*bpp+i*bpp+0]=i*0xff/w;
+ c->richSource[j*w*bpp+i*bpp+1]=(i+j)*0xff/(w+h);
+ c->richSource[j*w*bpp+i*bpp+2]=j*0xff/h;
+ c->richSource[j*w*bpp+i*bpp+3]=0;
+ }
+ }
+}
+
+/* Initialization */
+
+int main(int argc,char** argv)
+{
+ rfbScreenInfoPtr rfbScreen =
+ rfbGetScreen(&argc,argv,maxx,maxy,8,3,bpp);
+ rfbScreen->desktopName = "LibVNCServer Example";
+ rfbScreen->frameBuffer = (char*)malloc(maxx*maxy*bpp);
+ rfbScreen->rfbAlwaysShared = TRUE;
+ rfbScreen->ptrAddEvent = doptr;
+ rfbScreen->kbdAddEvent = dokey;
+ rfbScreen->newClientHook = newclient;
+ rfbScreen->httpDir = "./classes";
+
+ initBuffer(rfbScreen->frameBuffer);
+ rfbDrawString(rfbScreen,&radonFont,20,100,"Hello, World!",0xffffff);
+
+ /* This call creates a mask and then a cursor: */
+ /* rfbScreen->defaultCursor =
+ rfbMakeXCursor(exampleCursorWidth,exampleCursorHeight,exampleCursor,0);
+ */
+
+ MakeRichCursor(rfbScreen);
+
+ /* initialize the server */
+ rfbInitServer(rfbScreen);
+
+#ifndef BACKGROUND_LOOP_TEST
+ /* this is the blocking event loop, i.e. it never returns */
+ /* 40000 are the microseconds, i.e. 0.04 seconds */
+ rfbRunEventLoop(rfbScreen,40000,FALSE);
+#elif !defined(HAVE_PTHREADS)
+#error "I need pthreads for that."
+#endif
+
+ /* this is the non-blocking event loop; a background thread is started */
+ rfbRunEventLoop(rfbScreen,-1,TRUE);
+ /* now we could do some cool things like rendering */
+ while(1) sleep(5); /* render(); */
+
+ return(0);
+}
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