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ext_dep/libvncserver/libvncserver-master/examples/pnmshow24.c 2.51 KB
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  /**
     @example pnmshow24.c
     pnmshow24 is like pnmshow, but it uses 3 bytes/pixel internally, which is not
     as efficient as 4 bytes/pixel for translation, because there is no native data
     type of that size, so you have to memcpy pixels and be real cautious with
     endianness. Anyway, it works.
   */
  
  #include <stdio.h>
  #include <rfb/rfb.h>
  #include <rfb/keysym.h>
  
  #ifndef LIBVNCSERVER_ALLOW24BPP
  int main() {
  	printf("I need the ALLOW24BPP LibVNCServer flag to work
  ");
  	exit(1);
  }
  #else
  
  static void HandleKey(rfbBool down,rfbKeySym key,rfbClientPtr cl)
  {
    if(down && (key==XK_Escape || key=='q' || key=='Q'))
      rfbCloseClient(cl);
  }
  
  int main(int argc,char** argv)
  {
    FILE* in=stdin;
    int j,width,height,paddedWidth;
    char buffer[1024];
    rfbScreenInfoPtr rfbScreen;
  
    if(argc>1) {
      in=fopen(argv[1],"rb");
      if(!in) {
        printf("Couldn't find file %s.
  ",argv[1]);
        exit(1);
      }
    }
  
    fgets(buffer,1024,in);
    if(strncmp(buffer,"P6",2)) {
      printf("Not a ppm.
  ");
      exit(2);
    }
  
    /* skip comments */
    do {
      fgets(buffer,1024,in);
    } while(buffer[0]=='#');
  
    /* get width & height */
    sscanf(buffer,"%d %d",&width,&height);
    rfbLog("Got width %d and height %d.
  ",width,height);
    fgets(buffer,1024,in);
  
    /* vncviewers have problems with widths which are no multiple of 4. */
    paddedWidth = width;
  
    /* if your vncviewer doesn't have problems with a width
       which is not a multiple of 4, you can comment this. */
    if(width&3)
      paddedWidth+=4-(width&3);
  
    /* initialize data for vnc server */
    rfbScreen = rfbGetScreen(&argc,argv,paddedWidth,height,8,3,3);
    if(!rfbScreen)
      return 1;
    if(argc>1)
      rfbScreen->desktopName = argv[1];
    else
      rfbScreen->desktopName = "Picture";
    rfbScreen->alwaysShared = TRUE;
    rfbScreen->kbdAddEvent = HandleKey;
  
    /* enable http */
    rfbScreen->httpDir = "../webclients";
  
    /* allocate picture and read it */
    rfbScreen->frameBuffer = (char*)malloc(paddedWidth*3*height);
    if(!rfbScreen->frameBuffer)
      return 1;
    fread(rfbScreen->frameBuffer,width*3,height,in);
    fclose(in);
  
    /* pad to paddedWidth */
    if(width != paddedWidth) {
      int padCount = 3*(paddedWidth - width);
      for(j=height-1;j>=0;j--) {
        memmove(rfbScreen->frameBuffer+3*paddedWidth*j,
  	      rfbScreen->frameBuffer+3*width*j,
  	      3*width);
        memset(rfbScreen->frameBuffer+3*paddedWidth*(j+1)-padCount,
  	     0,padCount);
      }
    }
  
    /* initialize server */
    rfbInitServer(rfbScreen);
  
    /* run event loop */
    rfbRunEventLoop(rfbScreen,40000,FALSE);
  
    return(0);
  }
  #endif