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158 lines
4.3 KiB
158 lines
4.3 KiB
/*
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*
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* This is an example of how to use libvncserver.
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*
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* libvncserver example
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* Copyright (C) 2001 Johannes E. Schindelin <Johannes.Schindelin@gmx.de>
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#include <stdio.h>
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#include <netinet/in.h>
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#ifdef __IRIX__
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#include <netdb.h>
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#endif
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#define XK_MISCELLANY
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#include "rfb.h"
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#include "keysymdef.h"
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const int maxx=640, maxy=480, bpp=4;
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/* This initializes a nice (?) background */
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void initBuffer(unsigned char* buffer)
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{
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int i,j;
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for(i=0;i<maxx;++i)
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for(j=0;j<maxy;++j) {
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buffer[(j*maxx+i)*bpp+1]=(i+j)*256/(maxx+maxy); /* red */
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buffer[(j*maxx+i)*bpp+2]=i*256/maxx; /* green */
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buffer[(j*maxx+i)*bpp+3]=j*256/maxy; /* blue */
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}
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}
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/* Here we create a structure so that every client has it's own pointer */
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typedef struct ClientData {
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Bool oldButton;
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int oldx,oldy;
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} ClientData;
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void clientgone(rfbClientPtr cl)
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{
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free(cl->clientData);
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}
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void newclient(rfbClientPtr cl)
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{
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cl->clientData = (void*)calloc(sizeof(ClientData),1);
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cl->clientGoneHook = clientgone;
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}
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/* aux function to draw a line */
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void drawline(unsigned char* buffer,int rowstride,int bpp,int x1,int y1,int x2,int y2)
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{
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int i,j;
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i=x1-x2; j=y1-y2;
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if(i<0) i=-i;
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if(j<0) j=-j;
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if(i<j) {
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if(y1>y2) { i=y2; y2=y1; y1=i; i=x2; x2=x1; x1=i; }
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if(y2==y1) { if(y2>0) y1--; else y2++; }
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for(j=y1;j<=y2;j++)
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for(i=0;i<bpp;i++)
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buffer[j*rowstride+(x1+(j-y1)*(x2-x1)/(y2-y1))*bpp+i]=0xff;
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} else {
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if(x1>x2) { i=y2; y2=y1; y1=i; i=x2; x2=x1; x1=i; }
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for(i=x1;i<=x2;i++)
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for(j=0;j<bpp;j++)
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buffer[(y1+(i-x1)*(y2-y1)/(x2-x1))*rowstride+i*bpp+j]=0xff;
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}
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}
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/* Here the pointer events are handled */
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void doptr(int buttonMask,int x,int y,rfbClientPtr cl)
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{
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ClientData* cd=cl->clientData;
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if(buttonMask && x>=0 && y>=0 && x<maxx && y<maxy) {
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int i,j,x1,x2,y1,y2;
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if(cd->oldButton==buttonMask) { /* draw a line */
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drawline(cl->screen->frameBuffer,cl->screen->paddedWidthInBytes,bpp,
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x,y,cd->oldx,cd->oldy);
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rfbMarkRectAsModified(cl->screen,x,y,cd->oldx,cd->oldy);
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} else { /* draw a point (diameter depends on button) */
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x1=x-buttonMask; if(x1<0) x1=0;
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x2=x+buttonMask; if(x2>maxx) x2=maxx;
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y1=y-buttonMask; if(y1<0) y1=0;
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y2=y+buttonMask; if(y2>maxy) y2=maxy;
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for(i=x1*bpp;i<x2*bpp;i++)
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for(j=y1;j<y2;j++)
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cl->screen->frameBuffer[j*cl->screen->paddedWidthInBytes+i]=0xff;
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rfbMarkRectAsModified(cl->screen,x1,y1,x2-1,y2-1);
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}
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/* we could get a selection like that:
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rfbGotXCutText(cl->screen,"Hallo",5);
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*/
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cd->oldx=x; cd->oldy=y; cd->oldButton=buttonMask;
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} else
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cd->oldButton=0;
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}
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/* Here the key events are handled */
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void dokey(Bool down,KeySym key,rfbClientPtr cl)
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{
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if(down && key==XK_Escape)
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rfbCloseClient(cl);
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else if(down && key=='c') {
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initBuffer(cl->screen->frameBuffer);
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rfbMarkRectAsModified(cl->screen,0,0,maxx,maxy);
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}
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}
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/* Initialisation */
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int main(int argc,char** argv)
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{
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rfbScreenInfoPtr rfbScreen =
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rfbDefaultScreenInit(argc,argv,maxx,maxy,8,3,bpp);
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rfbScreen->desktopName = "LibVNCServer Example";
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rfbScreen->frameBuffer = (char*)malloc(maxx*maxy*bpp);
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rfbScreen->rfbAlwaysShared = TRUE;
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rfbScreen->ptrAddEvent = doptr;
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rfbScreen->kbdAddEvent = dokey;
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rfbScreen->newClientHook = newclient;
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initBuffer(rfbScreen->frameBuffer);
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/* this is the blocking event loop, i.e. it never returns */
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runEventLoop(rfbScreen,40000,FALSE);
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/* this is the non-blocking event loop; a background thread is started */
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runEventLoop(rfbScreen,40000,TRUE);
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/* now we could do some cool things like rendering */
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while(1);
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return(0);
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}
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