San Mehat | a430b2b | 2014-09-23 08:30:51 -0700 | [diff] [blame] | 1 | /** |
| 2 | * @example example.c |
| 3 | * This is an example of how to use libvncserver. |
| 4 | * |
| 5 | * libvncserver example |
| 6 | * Copyright (C) 2001 Johannes E. Schindelin <Johannes.Schindelin@gmx.de> |
| 7 | * |
| 8 | * This is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This software is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this software; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 21 | * USA. |
| 22 | */ |
| 23 | |
| 24 | #ifdef WIN32 |
| 25 | #define sleep Sleep |
| 26 | #else |
| 27 | #include <unistd.h> |
| 28 | #endif |
| 29 | |
| 30 | #ifdef __IRIX__ |
| 31 | #include <netdb.h> |
| 32 | #endif |
| 33 | |
| 34 | #include <rfb/rfb.h> |
| 35 | #include <rfb/keysym.h> |
| 36 | |
| 37 | static const int bpp=4; |
| 38 | static int maxx=800, maxy=600; |
| 39 | /* TODO: odd maxx doesn't work (vncviewer bug) */ |
| 40 | |
| 41 | /* This initializes a nice (?) background */ |
| 42 | |
| 43 | static void initBuffer(unsigned char* buffer) |
| 44 | { |
| 45 | int i,j; |
| 46 | for(j=0;j<maxy;++j) { |
| 47 | for(i=0;i<maxx;++i) { |
| 48 | buffer[(j*maxx+i)*bpp+0]=(i+j)*128/(maxx+maxy); /* red */ |
| 49 | buffer[(j*maxx+i)*bpp+1]=i*128/maxx; /* green */ |
| 50 | buffer[(j*maxx+i)*bpp+2]=j*256/maxy; /* blue */ |
| 51 | } |
| 52 | buffer[j*maxx*bpp+0]=0xff; |
| 53 | buffer[j*maxx*bpp+1]=0xff; |
| 54 | buffer[j*maxx*bpp+2]=0xff; |
| 55 | buffer[j*maxx*bpp+3]=0xff; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | /* Here we create a structure so that every client has it's own pointer */ |
| 60 | |
| 61 | typedef struct ClientData { |
| 62 | rfbBool oldButton; |
| 63 | int oldx,oldy; |
| 64 | } ClientData; |
| 65 | |
| 66 | static void clientgone(rfbClientPtr cl) |
| 67 | { |
| 68 | free(cl->clientData); |
| 69 | } |
| 70 | |
| 71 | static enum rfbNewClientAction newclient(rfbClientPtr cl) |
| 72 | { |
| 73 | cl->clientData = (void*)calloc(sizeof(ClientData),1); |
| 74 | cl->clientGoneHook = clientgone; |
| 75 | return RFB_CLIENT_ACCEPT; |
| 76 | } |
| 77 | |
| 78 | /* switch to new framebuffer contents */ |
| 79 | |
| 80 | static void newframebuffer(rfbScreenInfoPtr screen, int width, int height) |
| 81 | { |
| 82 | unsigned char *oldfb, *newfb; |
| 83 | |
| 84 | maxx = width; |
| 85 | maxy = height; |
| 86 | oldfb = (unsigned char*)screen->frameBuffer; |
| 87 | newfb = (unsigned char*)malloc(maxx * maxy * bpp); |
| 88 | initBuffer(newfb); |
| 89 | rfbNewFramebuffer(screen, (char*)newfb, maxx, maxy, 8, 3, bpp); |
| 90 | free(oldfb); |
| 91 | |
| 92 | /*** FIXME: Re-install cursor. ***/ |
| 93 | } |
| 94 | |
| 95 | /* aux function to draw a line */ |
| 96 | |
| 97 | static void drawline(unsigned char* buffer,int rowstride,int bpp,int x1,int y1,int x2,int y2) |
| 98 | { |
| 99 | int i,j; |
| 100 | i=x1-x2; j=y1-y2; |
| 101 | if(i==0 && j==0) { |
| 102 | for(i=0;i<bpp;i++) |
| 103 | buffer[y1*rowstride+x1*bpp+i]=0xff; |
| 104 | return; |
| 105 | } |
| 106 | if(i<0) i=-i; |
| 107 | if(j<0) j=-j; |
| 108 | if(i<j) { |
| 109 | if(y1>y2) { i=y2; y2=y1; y1=i; i=x2; x2=x1; x1=i; } |
| 110 | for(j=y1;j<=y2;j++) |
| 111 | for(i=0;i<bpp;i++) |
| 112 | buffer[j*rowstride+(x1+(j-y1)*(x2-x1)/(y2-y1))*bpp+i]=0xff; |
| 113 | } else { |
| 114 | if(x1>x2) { i=y2; y2=y1; y1=i; i=x2; x2=x1; x1=i; } |
| 115 | for(i=x1;i<=x2;i++) |
| 116 | for(j=0;j<bpp;j++) |
| 117 | buffer[(y1+(i-x1)*(y2-y1)/(x2-x1))*rowstride+i*bpp+j]=0xff; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | /* Here the pointer events are handled */ |
| 122 | |
| 123 | static void doptr(int buttonMask,int x,int y,rfbClientPtr cl) |
| 124 | { |
| 125 | ClientData* cd=cl->clientData; |
| 126 | |
| 127 | if(x>=0 && y>=0 && x<maxx && y<maxy) { |
| 128 | if(buttonMask) { |
| 129 | int i,j,x1,x2,y1,y2; |
| 130 | |
| 131 | if(cd->oldButton==buttonMask) { /* draw a line */ |
| 132 | drawline((unsigned char*)cl->screen->frameBuffer,cl->screen->paddedWidthInBytes,bpp, |
| 133 | x,y,cd->oldx,cd->oldy); |
| 134 | x1=x; y1=y; |
| 135 | if(x1>cd->oldx) x1++; else cd->oldx++; |
| 136 | if(y1>cd->oldy) y1++; else cd->oldy++; |
| 137 | rfbMarkRectAsModified(cl->screen,x,y,cd->oldx,cd->oldy); |
| 138 | } else { /* draw a point (diameter depends on button) */ |
| 139 | int w=cl->screen->paddedWidthInBytes; |
| 140 | x1=x-buttonMask; if(x1<0) x1=0; |
| 141 | x2=x+buttonMask; if(x2>maxx) x2=maxx; |
| 142 | y1=y-buttonMask; if(y1<0) y1=0; |
| 143 | y2=y+buttonMask; if(y2>maxy) y2=maxy; |
| 144 | |
| 145 | for(i=x1*bpp;i<x2*bpp;i++) |
| 146 | for(j=y1;j<y2;j++) |
| 147 | cl->screen->frameBuffer[j*w+i]=(char)0xff; |
| 148 | rfbMarkRectAsModified(cl->screen,x1,y1,x2,y2); |
| 149 | } |
| 150 | |
| 151 | /* we could get a selection like that: |
| 152 | rfbGotXCutText(cl->screen,"Hallo",5); |
| 153 | */ |
| 154 | } else |
| 155 | cd->oldButton=0; |
| 156 | |
| 157 | cd->oldx=x; cd->oldy=y; cd->oldButton=buttonMask; |
| 158 | } |
| 159 | rfbDefaultPtrAddEvent(buttonMask,x,y,cl); |
| 160 | } |
| 161 | |
| 162 | /* aux function to draw a character to x, y */ |
| 163 | |
| 164 | #include "radon.h" |
| 165 | |
| 166 | /* Here the key events are handled */ |
| 167 | |
| 168 | static void dokey(rfbBool down,rfbKeySym key,rfbClientPtr cl) |
| 169 | { |
| 170 | if(down) { |
| 171 | if(key==XK_Escape) |
| 172 | rfbCloseClient(cl); |
| 173 | else if(key==XK_F12) |
| 174 | /* close down server, disconnecting clients */ |
| 175 | rfbShutdownServer(cl->screen,TRUE); |
| 176 | else if(key==XK_F11) |
| 177 | /* close down server, but wait for all clients to disconnect */ |
| 178 | rfbShutdownServer(cl->screen,FALSE); |
| 179 | else if(key==XK_Page_Up) { |
| 180 | initBuffer((unsigned char*)cl->screen->frameBuffer); |
| 181 | rfbMarkRectAsModified(cl->screen,0,0,maxx,maxy); |
| 182 | } else if (key == XK_Up) { |
| 183 | if (maxx < 1024) { |
| 184 | if (maxx < 800) { |
| 185 | newframebuffer(cl->screen, 800, 600); |
| 186 | } else { |
| 187 | newframebuffer(cl->screen, 1024, 768); |
| 188 | } |
| 189 | } |
| 190 | } else if(key==XK_Down) { |
| 191 | if (maxx > 640) { |
| 192 | if (maxx > 800) { |
| 193 | newframebuffer(cl->screen, 800, 600); |
| 194 | } else { |
| 195 | newframebuffer(cl->screen, 640, 480); |
| 196 | } |
| 197 | } |
| 198 | } else if(key>=' ' && key<0x100) { |
| 199 | ClientData* cd=cl->clientData; |
| 200 | int x1=cd->oldx,y1=cd->oldy,x2,y2; |
| 201 | cd->oldx+=rfbDrawCharWithClip(cl->screen,&radonFont,cd->oldx,cd->oldy,(char)key,0,0,cl->screen->width,cl->screen->height,0x00ffffff,0x00ffffff); |
| 202 | rfbFontBBox(&radonFont,(char)key,&x1,&y1,&x2,&y2); |
| 203 | rfbMarkRectAsModified(cl->screen,x1,y1,x2-1,y2-1); |
| 204 | } |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | /* Example for an XCursor (foreground/background only) */ |
| 209 | |
| 210 | #ifdef JUST_AN_EXAMPLE |
| 211 | |
| 212 | static int exampleXCursorWidth=9,exampleXCursorHeight=7; |
| 213 | static char exampleXCursor[]= |
| 214 | " " |
| 215 | " xx xx " |
| 216 | " xx xx " |
| 217 | " xxx " |
| 218 | " xx xx " |
| 219 | " xx xx " |
| 220 | " "; |
| 221 | |
| 222 | #endif |
| 223 | |
| 224 | /* Example for a rich cursor (full-colour) */ |
| 225 | |
| 226 | static void MakeRichCursor(rfbScreenInfoPtr rfbScreen) |
| 227 | { |
| 228 | int i,j,w=32,h=32; |
| 229 | rfbCursorPtr c = rfbScreen->cursor; |
| 230 | char bitmap[]= |
| 231 | " " |
| 232 | " xxxxxx " |
| 233 | " xxxxxxxxxxxxxxxxx " |
| 234 | " xxxxxxxxxxxxxxxxxxxxxx " |
| 235 | " xxxxx xxxxxxxx xxxxxxxx " |
| 236 | " xxxxxxxxxxxxxxxxxxxxxxxxxxx " |
| 237 | " xxxxxxxxxxxxxxxxxxxxxxxxxxxxx " |
| 238 | " xxxxx xxxxxxxxxxx xxxxxxx " |
| 239 | " xxxx xxxxxxxxx xxxxxx " |
| 240 | " xxxxx xxxxxxxxxxx xxxxxxx " |
| 241 | " xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx " |
| 242 | " xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx " |
| 243 | " xxxxxxxxxxxx xxxxxxxxxxxxxxx " |
| 244 | " xxxxxxxxxxxxxxxxxxxxxxxxxxxx " |
| 245 | " xxxxxxxxxxxxxxxxxxxxxxxxxxxx " |
| 246 | " xxxxxxxxxxx xxxxxxxxxxxxxx " |
| 247 | " xxxxxxxxxx xxxxxxxxxxxx " |
| 248 | " xxxxxxxxx xxxxxxxxx " |
| 249 | " xxxxxxxxxx xxxxxxxxx " |
| 250 | " xxxxxxxxxxxxxxxxxxx " |
| 251 | " xxxxxxxxxxxxxxxxxxx " |
| 252 | " xxxxxxxxxxxxxxxxxxx " |
| 253 | " xxxxxxxxxxxxxxxxx " |
| 254 | " xxxxxxxxxxxxxxx " |
| 255 | " xxxx xxxxxxxxxxxxx " |
| 256 | " xx x xxxxxxxxxxx " |
| 257 | " xxx xxxxxxxxxxx " |
| 258 | " xxxx xxxxxxxxxxx " |
| 259 | " xxxxxx xxxxxxxxxxxx " |
| 260 | " xxxxxxxxxxxxxxxxxxxxxx " |
| 261 | " xxxxxxxxxxxxxxxx " |
| 262 | " "; |
| 263 | c=rfbScreen->cursor = rfbMakeXCursor(w,h,bitmap,bitmap); |
| 264 | c->xhot = 16; c->yhot = 24; |
| 265 | |
| 266 | c->richSource = (unsigned char*)malloc(w*h*bpp); |
| 267 | c->cleanupRichSource = TRUE; |
| 268 | for(j=0;j<h;j++) { |
| 269 | for(i=0;i<w;i++) { |
| 270 | c->richSource[j*w*bpp+i*bpp+0]=i*0xff/w; |
| 271 | c->richSource[j*w*bpp+i*bpp+1]=(i+j)*0xff/(w+h); |
| 272 | c->richSource[j*w*bpp+i*bpp+2]=j*0xff/h; |
| 273 | c->richSource[j*w*bpp+i*bpp+3]=0; |
| 274 | } |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | /* Initialization */ |
| 279 | |
| 280 | int main(int argc,char** argv) |
| 281 | { |
| 282 | rfbScreenInfoPtr rfbScreen = rfbGetScreen(&argc,argv,maxx,maxy,8,3,bpp); |
| 283 | if(!rfbScreen) |
| 284 | return 0; |
| 285 | rfbScreen->desktopName = "LibVNCServer Example"; |
| 286 | rfbScreen->frameBuffer = (char*)malloc(maxx*maxy*bpp); |
| 287 | rfbScreen->alwaysShared = TRUE; |
| 288 | rfbScreen->ptrAddEvent = doptr; |
| 289 | rfbScreen->kbdAddEvent = dokey; |
| 290 | rfbScreen->newClientHook = newclient; |
| 291 | rfbScreen->httpDir = "../webclients"; |
| 292 | rfbScreen->httpEnableProxyConnect = TRUE; |
| 293 | |
| 294 | initBuffer((unsigned char*)rfbScreen->frameBuffer); |
| 295 | rfbDrawString(rfbScreen,&radonFont,20,100,"Hello, World!",0xffffff); |
| 296 | |
| 297 | /* This call creates a mask and then a cursor: */ |
| 298 | /* rfbScreen->defaultCursor = |
| 299 | rfbMakeXCursor(exampleCursorWidth,exampleCursorHeight,exampleCursor,0); |
| 300 | */ |
| 301 | |
| 302 | MakeRichCursor(rfbScreen); |
| 303 | |
| 304 | /* initialize the server */ |
| 305 | rfbInitServer(rfbScreen); |
| 306 | |
| 307 | #ifndef BACKGROUND_LOOP_TEST |
| 308 | #ifdef USE_OWN_LOOP |
| 309 | { |
| 310 | int i; |
| 311 | for(i=0;rfbIsActive(rfbScreen);i++) { |
| 312 | fprintf(stderr,"%d\r",i); |
| 313 | rfbProcessEvents(rfbScreen,100000); |
| 314 | } |
| 315 | } |
| 316 | #else |
| 317 | /* this is the blocking event loop, i.e. it never returns */ |
| 318 | /* 40000 are the microseconds to wait on select(), i.e. 0.04 seconds */ |
| 319 | rfbRunEventLoop(rfbScreen,40000,FALSE); |
| 320 | #endif /* OWN LOOP */ |
| 321 | #else |
| 322 | #if !defined(LIBVNCSERVER_HAVE_LIBPTHREAD) |
| 323 | #error "I need pthreads for that." |
| 324 | #endif |
| 325 | |
| 326 | /* this is the non-blocking event loop; a background thread is started */ |
| 327 | rfbRunEventLoop(rfbScreen,-1,TRUE); |
| 328 | fprintf(stderr, "Running background loop...\n"); |
| 329 | /* now we could do some cool things like rendering in idle time */ |
| 330 | while(1) sleep(5); /* render(); */ |
| 331 | #endif /* BACKGROUND_LOOP */ |
| 332 | |
| 333 | free(rfbScreen->frameBuffer); |
| 334 | rfbScreenCleanup(rfbScreen); |
| 335 | |
| 336 | return(0); |
| 337 | } |