git.maemo.org Git - presencevnc/blob - libvnc/examples/pnmshow.c

   1 #include <stdio.h>
   2 #include <rfb/rfb.h>
   3 #include <rfb/keysym.h>
   4
   5 #ifndef HAVE_HANDLEKEY
   6 static void HandleKey(rfbBool down,rfbKeySym key,rfbClientPtr cl)
   7 {
   8   if(down && (key==XK_Escape || key=='q' || key=='Q'))
   9     rfbCloseClient(cl);
  10 }
  11 #endif
  12
  13 int main(int argc,char** argv)
  14 {
  15   FILE* in=stdin;
  16   int i,j,k,l,width,height,paddedWidth;
  17   char buffer[1024];
  18   rfbScreenInfoPtr rfbScreen;
  19   enum { BW, GRAY, TRUECOLOUR } picType=TRUECOLOUR;
  20   int bytesPerPixel,bitsPerPixelInFile;
  21
  22   if(argc>1) {
  23     in=fopen(argv[1],"rb");
  24     if(!in) {
  25       printf("Couldn't find file %s.\n",argv[1]);
  26       exit(1);
  27     }
  28   }
  29
  30   fgets(buffer,1024,in);
  31   if(!strncmp(buffer,"P6",2)) {
  32           picType=TRUECOLOUR;
  33           bytesPerPixel=4; bitsPerPixelInFile=3*8;
  34   } else if(!strncmp(buffer,"P5",2)) {
  35           picType=GRAY;
  36           bytesPerPixel=1; bitsPerPixelInFile=1*8;
  37   } else if(!strncmp(buffer,"P4",2)) {
  38           picType=BW;
  39           bytesPerPixel=1; bitsPerPixelInFile=1;
  40   } else {
  41     printf("Not a ppm.\n");
  42     exit(2);
  43   }
  44
  45   /* skip comments */
  46   do {
  47     fgets(buffer,1024,in);
  48   } while(buffer[0]=='#');
  49
  50   /* get width & height */
  51   sscanf(buffer,"%d %d",&width,&height);
  52   rfbLog("Got width %d and height %d.\n",width,height);
  53   if(picType!=BW)
  54         fgets(buffer,1024,in);
  55   else
  56           width=1+((width-1)|7);
  57
  58   /* vncviewers have problems with widths which are no multiple of 4. */
  59   paddedWidth = width;
  60   if(width&3)
  61     paddedWidth+=4-(width&3);
  62
  63   /* initialize data for vnc server */
  64   rfbScreen = rfbGetScreen(&argc,argv,paddedWidth,height,8,(bitsPerPixelInFile+7)/8,bytesPerPixel);
  65   if(argc>1)
  66     rfbScreen->desktopName = argv[1];
  67   else
  68     rfbScreen->desktopName = "Picture";
  69   rfbScreen->alwaysShared = TRUE;
  70   rfbScreen->kbdAddEvent = HandleKey;
  71
  72   /* enable http */
  73   rfbScreen->httpDir = "../classes";
  74
  75   /* allocate picture and read it */
  76   rfbScreen->frameBuffer = (char*)malloc(paddedWidth*bytesPerPixel*height);
  77   fread(rfbScreen->frameBuffer,width*bitsPerPixelInFile/8,height,in);
  78   fclose(in);
  79
  80   if(picType!=TRUECOLOUR) {
  81           rfbScreen->serverFormat.trueColour=FALSE;
  82           rfbScreen->colourMap.count=256;
  83           rfbScreen->colourMap.is16=FALSE;
  84           rfbScreen->colourMap.data.bytes=malloc(256*3);
  85           for(i=0;i<256;i++)
  86                   memset(rfbScreen->colourMap.data.bytes+3*i,i,3);
  87   }
  88
  89   switch(picType) {
  90         case TRUECOLOUR:
  91                   /* correct the format to 4 bytes instead of 3 (and pad to paddedWidth) */
  92                   for(j=height-1;j>=0;j--) {
  93                     for(i=width-1;i>=0;i--)
  94                       for(k=2;k>=0;k--)
  95                         rfbScreen->frameBuffer[(j*paddedWidth+i)*4+k]=
  96                           rfbScreen->frameBuffer[(j*width+i)*3+k];
  97                     for(i=width*4;i<paddedWidth*4;i++)
  98                       rfbScreen->frameBuffer[j*paddedWidth*4+i]=0;
  99                   }
 100                   break;
 101         case GRAY:
 102                   break;
 103         case BW:
 104                   /* correct the format from 1 bit to 8 bits */
 105                   for(j=height-1;j>=0;j--)
 106                           for(i=width-1;i>=0;i-=8) {
 107                                   l=(unsigned char)rfbScreen->frameBuffer[(j*width+i)/8];
 108                                   for(k=7;k>=0;k--)
 109                                           rfbScreen->frameBuffer[j*paddedWidth+i+7-k]=(l&(1<<k))?0:255;
 110                           }
 111                   break;
 112   }
 113
 114   /* initialize server */
 115   rfbInitServer(rfbScreen);
 116
 117   /* run event loop */
 118   rfbRunEventLoop(rfbScreen,40000,FALSE);
 119
 120   return(0);
 121 }