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libtdevnc/x11vnc.c

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/* 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 window;
int c=0,blockLength = 32;
int tileX=0,tileY=0,tileWidth=32,tileHeight=32,dontTile=True;
Bool gotInput = FALSE;
Bool disconnectAfterFirstClient = TRUE;
/* keyboard handling */
char modifiers[0x100];
KeyCode keycodes[0x100],leftShiftCode,rightShiftCode,altGrCode;
void init_keycodes()
{
KeySym key,*keymap;
int i,j,minkey,maxkey,syms_per_keycode;
memset(modifiers,-1,sizeof(modifiers));
XDisplayKeycodes(dpy,&minkey,&maxkey);
keymap=XGetKeyboardMapping(dpy,minkey,(maxkey - minkey + 1),&syms_per_keycode);
for (i = minkey; i <= maxkey; i++)
for(j=0;j<syms_per_keycode;j++) {
key=keymap[(i-minkey)*syms_per_keycode+j];
if(key>=' ' && key<0x100 && i==XKeysymToKeycode(dpy,key)) {
keycodes[key]=i;
modifiers[key]=j;
}
}
leftShiftCode=XKeysymToKeycode(dpy,XK_Shift_L);
rightShiftCode=XKeysymToKeycode(dpy,XK_Shift_R);
altGrCode=XKeysymToKeycode(dpy,XK_Mode_switch);
XFree ((char *) keymap);
}
/* the hooks */
void clientGone(rfbClientPtr cl)
{
exit(0);
}
void newClient(rfbClientPtr cl)
{
if(disconnectAfterFirstClient)
cl->clientGoneHook = clientGone;
}
#define LEFTSHIFT 1
#define RIGHTSHIFT 2
#define ALTGR 4
char ModifierState = 0;
/* this function adjusts the modifiers according to mod (as from modifiers) and ModifierState */
void tweakModifiers(char mod,Bool down)
{
Bool isShift=ModifierState&(LEFTSHIFT|RIGHTSHIFT);
if(mod<0) return;
if(isShift && mod!=1) {
if(ModifierState&LEFTSHIFT)
XTestFakeKeyEvent(dpy,leftShiftCode,!down,CurrentTime);
if(ModifierState&RIGHTSHIFT)
XTestFakeKeyEvent(dpy,rightShiftCode,!down,CurrentTime);
}
if(!isShift && mod==1)
XTestFakeKeyEvent(dpy,leftShiftCode,down,CurrentTime);
if(ModifierState&ALTGR && mod!=2)
XTestFakeKeyEvent(dpy,altGrCode,!down,CurrentTime);
if(!(ModifierState&ALTGR) && mod==2)
XTestFakeKeyEvent(dpy,altGrCode,down,CurrentTime);
}
void keyboard(Bool down,KeySym keySym,rfbClientPtr cl)
{
#define ADJUSTMOD(sym,state) \
if(keySym==sym) { if(down) ModifierState|=state; else ModifierState&=~state; }
ADJUSTMOD(XK_Shift_L,LEFTSHIFT)
ADJUSTMOD(XK_Shift_R,RIGHTSHIFT)
ADJUSTMOD(XK_Mode_switch,ALTGR)
if(keySym>=' ' && keySym<0x100) {
KeyCode k;
/* if(down)
tweakModifiers(modifiers[keySym],True); */
tweakModifiers(modifiers[keySym],down);
XTestFakeKeyEvent(dpy,XK_Shift_R,True,CurrentTime);
k = XKeysymToKeycode( dpy,keySym );
if(k!=NoSymbol) {
XTestFakeKeyEvent(dpy,k,down,CurrentTime);
gotInput = TRUE;
}
/*XTestFakeKeyEvent(dpy,keycodes[keySym],down,CurrentTime);*/
/*if(down)
tweakModifiers(modifiers[keySym],False);*/
gotInput = TRUE;
} else {
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,int x,int y,int width,int height)
{
if(width<=0) width=DisplayWidth(dpy,xscreen);
if(height<=0) height=DisplayHeight(dpy,xscreen);
if(useSHM && bpp>0) {
static Bool firstTime = TRUE;
if(firstTime) {
firstTime = FALSE;
*i = XShmCreateImage(dpy,
DefaultVisual( dpy, xscreen ),
bpp,
ZPixmap,
NULL,
&shminfo,
width,height);
if(*i == 0) {
useSHM = FALSE;
getImage(bpp,dpy,xscreen,i,x,y,width,height);
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 );
}
if(x==0 && y==0 && width==DisplayWidth(dpy,xscreen) && height==DisplayHeight(dpy,xscreen))
XShmGetImage(dpy,window,*i,0,0,AllPlanes);
else
XGetSubImage(dpy,window,x,y,width,height,AllPlanes,ZPixmap,*i,0,0);
} else {
*i = XGetImage(dpy,window,x,y,width,height,AllPlanes,ZPixmap );
}
}
void checkForImageUpdates(rfbScreenInfoPtr s,char *b,int rowstride,int x,int y,int width,int height)
{
Bool changed;
int i,j,k,l1,l2,x1,y1;
for(j=0;j<height;j+=blockLength)
for(i=0;i<width;i+=blockLength) {
y1=j+blockLength; if(y1>height) y1=height;
x1=i+blockLength; if(x1>width) x1=width;
y1*=rowstride;
x1*=s->bitsPerPixel/8;
changed=FALSE;
for(l1=j*rowstride,l2=j*s->paddedWidthInBytes;l1<y1;l1+=rowstride,l2+=s->paddedWidthInBytes)
for(k=i*s->bitsPerPixel/8;k<x1;k++)
if(s->frameBuffer[l2+k]!=b[l1+k]) {
// fprintf(stderr,"changed: %d, %d\n",k,l);
changed=TRUE;
goto changed_p;
}
if(changed) {
changed_p:
for(l1+=i*s->bitsPerPixel/8,l2+=i*s->bitsPerPixel/8;l1<y1;l1+=rowstride,l2+=s->paddedWidthInBytes)
memcpy(/*b+l,*/s->frameBuffer+l2,b+l1,x1-i*s->bitsPerPixel/8);
rfbMarkRectAsModified(s,x+i,y+j,x+i+blockLength,y+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) {
fprintf(stderr,"Using display %s\n",argv[i+1]);
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("");
if(dpy==0) {
fprintf(stderr,"Couldn't open display!\n");
exit(2);
}
xscreen = DefaultScreen(dpy);
window = RootWindow(dpy,xscreen);
XTestGrabControl(dpy,True);
init_keycodes();
getImage(0,dpy,xscreen,&framebufferImage,0,0,-1,-1);
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);
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");
XTestDiscard(dpy);
exit(2);
}
rfbProcessEvents(screen,-1);
if(gotInput) {
gotInput = FALSE;
c=updateCounter;
} else if(screen->rfbClientHead && c++>updateCounter) {
c=0;
//fprintf(stderr,"*");
if(!useSHM)
framebufferImage->f.destroy_image(framebufferImage);
if(dontTile) {
getImage(screen->rfbServerFormat.bitsPerPixel,dpy,xscreen,&framebufferImage,0,0,screen->width,screen->height);
checkForImageUpdates(screen,framebufferImage->data,framebufferImage->bytes_per_line,
0,0,screen->width,screen->height);
} else {
char isRightEdge = tileX+tileWidth>=screen->width;
char isLowerEdge = tileY+tileHeight>=screen->height;
getImage(screen->rfbServerFormat.bitsPerPixel,dpy,xscreen,&framebufferImage,tileX,tileY,
isRightEdge?screen->width-tileX:tileWidth,
isLowerEdge?screen->height-tileY:tileHeight);
checkForImageUpdates(screen,framebufferImage->data,framebufferImage->bytes_per_line,
tileX,tileY,
isRightEdge?screen->width-tileX:tileWidth,
isLowerEdge?screen->height-tileY:tileHeight);
if(isRightEdge) {
tileX=0;
if(isLowerEdge)
tileY=0;
else
tileY+=tileHeight;
} else
tileX+=tileWidth;
}
//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);
}
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