moved files to contrib/ and examples/

1 files changed, 330 insertions, 0 deletions

diff --git a/examples/example.c b/examples/example.c
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+/*
+ * 
+ * This is an example of how to use libvncserver.
+ * 
+ * libvncserver example
+ * Copyright (C) 2001 Johannes E. Schindelin <Johannes.Schindelin@gmx.de>
+ * 
+ *  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 bpp=4;
+int maxx=800, maxy=600;
+/* 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;
+}
+
+/* switch to new framebuffer contents */
+
+void newframebuffer(rfbScreenInfoPtr screen, int width, int height)
+{
+  unsigned char *oldfb, *newfb;
+
+  maxx = width;
+  maxy = height;
+  oldfb = (unsigned char*)screen->frameBuffer;
+  newfb = (unsigned char*)malloc(maxx * maxy * bpp);
+  initBuffer(newfb);
+  rfbNewFramebuffer(screen, (char*)newfb, maxx, maxy, 8, 3, bpp);
+  free(oldfb);
+
+  /*** FIXME: Re-install cursor. ***/
+}
+
+/* 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((unsigned char*)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((unsigned char*)cl->screen->frameBuffer);
+      rfbMarkRectAsModified(cl->screen,0,0,maxx,maxy);
+    } else if (key == XK_Up) {
+      if (maxx < 1024) {
+        if (maxx < 800) {
+          newframebuffer(cl->screen, 800, 600);
+        } else {
+          newframebuffer(cl->screen, 1024, 768);
+        }
+      }
+    } else if(key==XK_Down) {
+      if (maxx > 640) {
+        if (maxx > 800) {
+          newframebuffer(cl->screen, 800, 600);
+        } else {
+          newframebuffer(cl->screen, 640, 480);
+        }
+      }
+    } 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";
+  rfbScreen->httpEnableProxyConnect = TRUE;
+
+  initBuffer((unsigned char*)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);
+
+#define USE_OWN_LOOP
+#ifdef USE_OWN_LOOP
+  {
+    int i;
+    for(i=0;;i++) {
+      fprintf(stderr,"%d\r",i);
+      rfbProcessEvents(rfbScreen,100000);
+    }
+  }
+#else
+
+#ifndef BACKGROUND_LOOP_TEST
+  /* this is the blocking event loop, i.e. it never returns */
+  /* 40000 are the microseconds to wait on select(), 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 in idle time */
+  while(1) sleep(5); /* render(); */
+#endif
+
+  rfbFreeCursor(rfbScreen->cursor);
+  free(rfbScreen->frameBuffer);
+  rfbScreenCleanup(rfbScreen);
+
+  return(0);
+}