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339 lines
9.5 KiB
339 lines
9.5 KiB
/**
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* @example example.c
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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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#ifdef WIN32
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#define sleep Sleep
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#else
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#include <unistd.h>
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#endif
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#ifdef __IRIX__
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#include <netdb.h>
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#endif
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#include <rfb/rfb.h>
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#include <rfb/keysym.h>
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static const int bpp=4;
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static int maxx=800, maxy=600;
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/* TODO: odd maxx doesn't work (vncviewer bug) */
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/* This initializes a nice (?) background */
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static void initBuffer(unsigned char* buffer)
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{
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int i,j;
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for(j=0;j<maxy;++j) {
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for(i=0;i<maxx;++i) {
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buffer[(j*maxx+i)*bpp+0]=(i+j)*128/(maxx+maxy); /* red */
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buffer[(j*maxx+i)*bpp+1]=i*128/maxx; /* green */
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buffer[(j*maxx+i)*bpp+2]=j*256/maxy; /* blue */
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}
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buffer[j*maxx*bpp+0]=0xff;
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buffer[j*maxx*bpp+1]=0xff;
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buffer[j*maxx*bpp+2]=0xff;
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buffer[j*maxx*bpp+3]=0xff;
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}
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}
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/* Here we create a structure so that every client has its own pointer */
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typedef struct ClientData {
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rfbBool oldButton;
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int oldx,oldy;
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} ClientData;
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static void clientgone(rfbClientPtr cl)
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{
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free(cl->clientData);
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cl->clientData = NULL;
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}
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static enum rfbNewClientAction 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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return RFB_CLIENT_ACCEPT;
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}
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/* switch to new framebuffer contents */
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static void newframebuffer(rfbScreenInfoPtr screen, int width, int height)
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{
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unsigned char *oldfb, *newfb;
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maxx = width;
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maxy = height;
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oldfb = (unsigned char*)screen->frameBuffer;
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newfb = (unsigned char*)malloc(maxx * maxy * bpp);
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initBuffer(newfb);
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rfbNewFramebuffer(screen, (char*)newfb, maxx, maxy, 8, 3, bpp);
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free(oldfb);
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/*** FIXME: Re-install cursor. ***/
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}
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/* aux function to draw a line */
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static 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 && j==0) {
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for(i=0;i<bpp;i++)
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buffer[y1*rowstride+x1*bpp+i]=0xff;
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return;
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}
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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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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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static 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(x>=0 && y>=0 && x<maxx && y<maxy) {
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if(buttonMask) {
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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((unsigned char*)cl->screen->frameBuffer,cl->screen->paddedWidthInBytes,bpp,
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x,y,cd->oldx,cd->oldy);
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x1=x; y1=y;
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if(x1>cd->oldx) x1++; else cd->oldx++;
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if(y1>cd->oldy) y1++; else 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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int w=cl->screen->paddedWidthInBytes;
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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*w+i]=(char)0xff;
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rfbMarkRectAsModified(cl->screen,x1,y1,x2,y2);
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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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} else
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cd->oldButton=0;
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cd->oldx=x; cd->oldy=y; cd->oldButton=buttonMask;
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}
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rfbDefaultPtrAddEvent(buttonMask,x,y,cl);
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}
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/* aux function to draw a character to x, y */
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#include "radon.h"
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/* Here the key events are handled */
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static void dokey(rfbBool down,rfbKeySym key,rfbClientPtr cl)
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{
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if(down) {
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if(key==XK_Escape)
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rfbCloseClient(cl);
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else if(key==XK_F12)
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/* close down server, disconnecting clients */
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rfbShutdownServer(cl->screen,TRUE);
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else if(key==XK_F11)
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/* close down server, but wait for all clients to disconnect */
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rfbShutdownServer(cl->screen,FALSE);
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else if(key==XK_Page_Up) {
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initBuffer((unsigned char*)cl->screen->frameBuffer);
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rfbMarkRectAsModified(cl->screen,0,0,maxx,maxy);
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} else if (key == XK_Up) {
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if (maxx < 1024) {
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if (maxx < 800) {
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newframebuffer(cl->screen, 800, 600);
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} else {
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newframebuffer(cl->screen, 1024, 768);
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}
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}
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} else if(key==XK_Down) {
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if (maxx > 640) {
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if (maxx > 800) {
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newframebuffer(cl->screen, 800, 600);
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} else {
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newframebuffer(cl->screen, 640, 480);
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}
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}
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} else if(key>=' ' && key<0x100) {
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ClientData* cd=cl->clientData;
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int x1=cd->oldx,y1=cd->oldy,x2,y2;
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cd->oldx+=rfbDrawCharWithClip(cl->screen,&radonFont,cd->oldx,cd->oldy,(char)key,0,0,cl->screen->width,cl->screen->height,0x00ffffff,0x00ffffff);
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rfbFontBBox(&radonFont,(char)key,&x1,&y1,&x2,&y2);
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rfbMarkRectAsModified(cl->screen,x1,y1,x2-1,y2-1);
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}
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}
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}
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/* Example for an XCursor (foreground/background only) */
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#ifdef JUST_AN_EXAMPLE
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static int exampleXCursorWidth=9,exampleXCursorHeight=7;
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static char exampleXCursor[]=
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" "
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" xx xx "
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" xx xx "
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" xxx "
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" xx xx "
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" xx xx "
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" ";
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#endif
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/* Example for a rich cursor (full-colour) */
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static void MakeRichCursor(rfbScreenInfoPtr rfbScreen)
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{
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int i,j,w=32,h=32;
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rfbCursorPtr c = rfbScreen->cursor;
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char bitmap[]=
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" "
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" xxxxxx "
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" xxxxxxxxxxxxxxxxx "
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" xxxxxxxxxxxxxxxxxxxxxx "
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" xxxxx xxxxxxxx xxxxxxxx "
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" xxxxxxxxxxxxxxxxxxxxxxxxxxx "
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" xxxxxxxxxxxxxxxxxxxxxxxxxxxxx "
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" xxxxx xxxxxxxxxxx xxxxxxx "
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" xxxx xxxxxxxxx xxxxxx "
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" xxxxx xxxxxxxxxxx xxxxxxx "
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" xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx "
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" xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx "
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" xxxxxxxxxxxx xxxxxxxxxxxxxxx "
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" xxxxxxxxxxxxxxxxxxxxxxxxxxxx "
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" xxxxxxxxxxxxxxxxxxxxxxxxxxxx "
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" xxxxxxxxxxx xxxxxxxxxxxxxx "
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" xxxxxxxxxx xxxxxxxxxxxx "
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" xxxxxxxxx xxxxxxxxx "
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" xxxxxxxxxx xxxxxxxxx "
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" xxxxxxxxxxxxxxxxxxx "
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" xxxxxxxxxxxxxxxxxxx "
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" xxxxxxxxxxxxxxxxxxx "
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" xxxxxxxxxxxxxxxxx "
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" xxxxxxxxxxxxxxx "
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" xxxx xxxxxxxxxxxxx "
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" xx x xxxxxxxxxxx "
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" xxx xxxxxxxxxxx "
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" xxxx xxxxxxxxxxx "
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" xxxxxx xxxxxxxxxxxx "
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" xxxxxxxxxxxxxxxxxxxxxx "
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" xxxxxxxxxxxxxxxx "
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" ";
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c=rfbScreen->cursor = rfbMakeXCursor(w,h,bitmap,bitmap);
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c->xhot = 16; c->yhot = 24;
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c->richSource = (unsigned char*)malloc(w*h*bpp);
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c->cleanupRichSource = TRUE;
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for(j=0;j<h;j++) {
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for(i=0;i<w;i++) {
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c->richSource[j*w*bpp+i*bpp+0]=i*0xff/w;
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c->richSource[j*w*bpp+i*bpp+1]=(i+j)*0xff/(w+h);
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c->richSource[j*w*bpp+i*bpp+2]=j*0xff/h;
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c->richSource[j*w*bpp+i*bpp+3]=0;
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}
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}
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}
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/* Initialization */
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int main(int argc,char** argv)
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{
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rfbScreenInfoPtr rfbScreen = rfbGetScreen(&argc,argv,maxx,maxy,8,3,bpp);
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if(!rfbScreen)
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return 0;
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rfbScreen->desktopName = "LibVNCServer Example";
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rfbScreen->frameBuffer = (char*)malloc(maxx*maxy*bpp);
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rfbScreen->alwaysShared = 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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rfbScreen->httpDir = "../webclients";
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rfbScreen->httpEnableProxyConnect = TRUE;
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initBuffer((unsigned char*)rfbScreen->frameBuffer);
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rfbDrawString(rfbScreen,&radonFont,20,100,"Hello, World!",0xffffff);
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/* This call creates a mask and then a cursor: */
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/* rfbScreen->defaultCursor =
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rfbMakeXCursor(exampleCursorWidth,exampleCursorHeight,exampleCursor,0);
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*/
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MakeRichCursor(rfbScreen);
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/* initialize the server */
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rfbInitServer(rfbScreen);
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#ifndef BACKGROUND_LOOP_TEST
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#ifdef USE_OWN_LOOP
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{
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int i;
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for(i=0;rfbIsActive(rfbScreen);i++) {
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fprintf(stderr,"%d\r",i);
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rfbProcessEvents(rfbScreen,100000);
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}
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}
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#else
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/* this is the blocking event loop, i.e. it never returns */
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/* 40000 are the microseconds to wait on select(), i.e. 0.04 seconds */
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rfbRunEventLoop(rfbScreen,40000,FALSE);
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#endif /* OWN LOOP */
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#else
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#if !defined(LIBVNCSERVER_HAVE_LIBPTHREAD)
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#error "I need pthreads for that."
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#endif
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/* this is the non-blocking event loop; a background thread is started */
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rfbRunEventLoop(rfbScreen,-1,TRUE);
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fprintf(stderr, "Running background loop...\n");
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/* now we could do some cool things like rendering in idle time */
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while(1) sleep(5); /* render(); */
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#endif /* BACKGROUND_LOOP */
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free(rfbScreen->frameBuffer);
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rfbScreenCleanup(rfbScreen);
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return(0);
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}
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