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libtdevnc/x11vnc.c

283 lines
8.3 KiB

/* This file is part of LibVNCServer. It is a small clone of x0rfbserver by HexoNet, demonstrating the
capabilities of LibVNCServer.
*/
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/extensions/XTest.h>
#ifndef NO_SHM
#include <X11/extensions/XShm.h>
#include <sys/shm.h>
#endif
#define KEYSYM_H
#include "rfb.h"
Display *dpy = 0;
int c=0,blockLength = 32;
Bool gotInput = FALSE;
Bool disconnectAfterFirstClient = TRUE;
/* the hooks */
void clientGone(rfbClientPtr cl)
{
exit(0);
}
void newClient(rfbClientPtr cl)
{
if(disconnectAfterFirstClient)
cl->clientGoneHook = clientGone;
}
void keyboard(Bool down,KeySym keySym,rfbClientPtr cl)
{
KeyCode k = XKeysymToKeycode( dpy,keySym );
if(k!=NoSymbol)
XTestFakeKeyEvent(dpy,k,down,CurrentTime);
gotInput = TRUE;
}
int oldButtonMask = 0;
void mouse(int buttonMask,int x,int y,rfbClientPtr cl)
{
int i=0;
//fprintf(stderr,"/");
XTestFakeMotionEvent(dpy,0,x,y,CurrentTime );
while(i<5) {
if ((oldButtonMask&(1<<i))!=(buttonMask&(1<<i)))
XTestFakeButtonEvent(dpy,i+1,(buttonMask&(1<<i))?True:False,CurrentTime);
i++;
}
oldButtonMask = buttonMask;
//fprintf(stderr,"-");
gotInput = TRUE;
}
/* the X11 interaction */
#ifndef NO_SHM
Bool useSHM = TRUE;
XShmSegmentInfo shminfo;
#else
Bool useSHM = FALSE;
#endif
void getImage(int bpp,Display *dpy,int xscreen,XImage **i)
{
if(useSHM && bpp>0) {
static Bool firstTime = TRUE;
if(firstTime) {
firstTime = FALSE;
*i = XShmCreateImage( dpy,
DefaultVisual( dpy, xscreen ),
bpp,
ZPixmap,
NULL,
&shminfo,
DisplayWidth(dpy,xscreen),
DisplayHeight(dpy,xscreen));
if(*i == 0) {
useSHM = FALSE;
getImage(bpp,dpy,xscreen,i);
return;
}
shminfo.shmid = shmget( IPC_PRIVATE,
(*i)->bytes_per_line * (*i)->height,
IPC_CREAT | 0777 );
shminfo.shmaddr = (*i)->data = (char *) shmat( shminfo.shmid, 0, 0 );
shminfo.readOnly = False;
XShmAttach( dpy, &shminfo );
}
XShmGetImage(dpy,RootWindow(dpy,xscreen),*i,0,0,AllPlanes);
} else {
*i = XGetImage(dpy,RootWindow(dpy,xscreen),0,0,DisplayWidth(dpy,xscreen),DisplayHeight(dpy,xscreen),
AllPlanes,ZPixmap );
}
}
void checkForImageUpdates(rfbScreenInfoPtr s,char *b)
{
Bool changed;
int i,j,k,l,x1,y1;
for(j=0;j<s->height;j+=blockLength)
for(i=0;i<s->width;i+=blockLength) {
y1=j+blockLength; if(y1>s->height) y1=s->height;
x1=i+blockLength; if(x1>s->width) x1=s->width;
y1*=s->paddedWidthInBytes;
x1*=s->bitsPerPixel/8;
changed=FALSE;
for(l=j*s->paddedWidthInBytes;l<y1;l+=s->paddedWidthInBytes)
for(k=i*s->bitsPerPixel/8;k<x1;k++)
if(s->frameBuffer[l+k]!=b[l+k]) {
// fprintf(stderr,"changed: %d, %d\n",k,l);
changed=TRUE;
goto changed_p;
}
if(changed) {
changed_p:
for(l+=i*s->bitsPerPixel/8;l<y1;l+=s->paddedWidthInBytes)
memcpy(/*b+l,*/s->frameBuffer+l,b+l,x1-i*s->bitsPerPixel/8);
rfbMarkRectAsModified(s,i,j,i+blockLength,j+blockLength);
}
}
}
/* the main program */
int main(int argc,char** argv)
{
Screen *sc;
Colormap cm;
XImage *framebufferImage;
char *backupImage;
int xscreen,i;
rfbScreenInfoPtr screen;
int maxMsecsToConnect = 5000; /* a maximum of 5 seconds to connect */
int updateCounter = 20; /* about every 50 ms a screen update should be made. */
for(i=argc-1;i>0;i--)
if(i<argc-1 && strcmp(argv[i],"-display")==0) {
dpy = XOpenDisplay(argv[i+1]);
if(dpy==0) {
fprintf(stderr,"Couldn't connect to display \"%s\".\n",argv[i+1]);
exit(1);
}
} else if(strcmp(argv[i],"-noshm")==0) {
useSHM = FALSE;
} else if(strcmp(argv[i],"-runforever")==0) {
disconnectAfterFirstClient = FALSE;
} else if(i<argc-1 && strcmp(argv[i],"-wait4client")==0) {
maxMsecsToConnect = atoi(argv[i+1]);
} else if(i<argc-1 && strcmp(argv[i],"-update")==0) {
updateCounter = atoi(argv[i+1]);
}
if(dpy==0)
dpy = XOpenDisplay("");
xscreen = DefaultScreen(dpy);
getImage(0,dpy,xscreen,&framebufferImage);
screen = rfbGetScreen(&argc,argv,framebufferImage->width,
framebufferImage->height,
framebufferImage->bits_per_pixel,
8,
framebufferImage->bits_per_pixel/8);
screen->paddedWidthInBytes = framebufferImage->bytes_per_line;
screen->rfbServerFormat.bitsPerPixel = framebufferImage->bits_per_pixel;
screen->rfbServerFormat.depth = framebufferImage->depth;
//rfbEndianTest = framebufferImage->bitmap_bit_order != MSBFirst;
screen->rfbServerFormat.trueColour = TRUE;
if ( screen->rfbServerFormat.bitsPerPixel == 8 ) {
if(CellsOfScreen(ScreenOfDisplay(dpy,xscreen))) {
XColor color[256];
int i;
screen->colourMap.count = 256;
screen->rfbServerFormat.trueColour = FALSE;
screen->colourMap.is16 = TRUE;
for(i=0;i<256;i++)
color[i].pixel=i;
XQueryColors(dpy,DefaultColormap(dpy,xscreen),color,256);
23 years ago
screen->colourMap.data.shorts = (short*)malloc(3*sizeof(short)*screen->colourMap.count);
for(i=0;i<screen->colourMap.count;i++) {
screen->colourMap.data.shorts[i*3+0] = color[i].red;
screen->colourMap.data.shorts[i*3+1] = color[i].green;
screen->colourMap.data.shorts[i*3+2] = color[i].blue;
}
} else {
screen->rfbServerFormat.redShift = 0;
screen->rfbServerFormat.greenShift = 2;
screen->rfbServerFormat.blueShift = 5;
screen->rfbServerFormat.redMax = 3;
screen->rfbServerFormat.greenMax = 7;
screen->rfbServerFormat.blueMax = 3;
}
} else {
screen->rfbServerFormat.redShift = 0;
if ( framebufferImage->red_mask )
while ( ! ( framebufferImage->red_mask & (1 << screen->rfbServerFormat.redShift) ) )
screen->rfbServerFormat.redShift++;
screen->rfbServerFormat.greenShift = 0;
if ( framebufferImage->green_mask )
while ( ! ( framebufferImage->green_mask & (1 << screen->rfbServerFormat.greenShift) ) )
screen->rfbServerFormat.greenShift++;
screen->rfbServerFormat.blueShift = 0;
if ( framebufferImage->blue_mask )
while ( ! ( framebufferImage->blue_mask & (1 << screen->rfbServerFormat.blueShift) ) )
screen->rfbServerFormat.blueShift++;
screen->rfbServerFormat.redMax = framebufferImage->red_mask >> screen->rfbServerFormat.redShift;
screen->rfbServerFormat.greenMax = framebufferImage->green_mask >> screen->rfbServerFormat.greenShift;
screen->rfbServerFormat.blueMax = framebufferImage->blue_mask >> screen->rfbServerFormat.blueShift;
}
backupImage = malloc(screen->height*screen->paddedWidthInBytes);
memcpy(backupImage,framebufferImage->data,screen->height*screen->paddedWidthInBytes);
screen->frameBuffer = backupImage;
screen->cursor = 0;
screen->newClientHook = newClient;
screen->kbdAddEvent = keyboard;
screen->ptrAddEvent = mouse;
screen->rfbDeferUpdateTime = 1;
updateCounter /= screen->rfbDeferUpdateTime;
rfbInitServer(screen);
c=0;
while(1) {
if(screen->rfbClientHead)
maxMsecsToConnect = 5000;
maxMsecsToConnect -= screen->rfbDeferUpdateTime;
if(maxMsecsToConnect<0) {
fprintf(stderr,"Maximum time to connect reached. Exiting.\n");
exit(2);
}
rfbProcessEvents(screen,-1);
if(gotInput) {
gotInput = FALSE;
c=updateCounter;
} else if(screen->rfbClientHead && c++>updateCounter) {
c=0;
//fprintf(stderr,"*");
23 years ago
if(!useSHM)
framebufferImage->f.destroy_image(framebufferImage);
getImage(screen->rfbServerFormat.bitsPerPixel,dpy,xscreen,&framebufferImage);
checkForImageUpdates(screen,framebufferImage->data);
//fprintf(stderr,"+");
}
#ifdef WRITE_SNAPS
{
int i,j,r,g,b;
FILE* f=fopen("test.pnm","wb");
fprintf(f,"P6\n%d %d\n255\n",screen->width,screen->height);
for(j=0;j<screen->height;j++)
for(i=0;i<screen->width;i++) {
//r=screen->frameBuffer[j*screen->paddedWidthInBytes+i*2];
r=framebufferImage->data[j*screen->paddedWidthInBytes+i*2];
fputc(((r>>screen->rfbServerFormat.redShift)&screen->rfbServerFormat.redMax)*255/screen->rfbServerFormat.redMax,f);
fputc(((r>>screen->rfbServerFormat.greenShift)&screen->rfbServerFormat.greenMax)*255/screen->rfbServerFormat.greenMax,f);
fputc(((r>>screen->rfbServerFormat.blueShift)&screen->rfbServerFormat.blueMax)*255/screen->rfbServerFormat.blueMax,f);
}
fclose(f);
}
#endif
}
#ifndef NO_SHM
//XShmDetach(dpy,framebufferImage);
#endif
return(0);
}