comments & new example: pnmshow

Makefile

@@ -26,7 +26,7 @@ OBJS=main.o rfbserver.o miregion.o auth.o sockets.o xalloc.o \
 	stats.o corre.o hextile.o rre.o translate.o cutpaste.o \
 	zlib.o tight.o
 
-all: example storepasswd
+all: example pnmshow storepasswd
 
 install_OSX: OSXvnc-server
 	cp OSXvnc-server storepasswd ../OSXvnc/build/OSXvnc.app/Contents/MacOS
@@ -41,6 +41,9 @@ libvncserver.a: $(OBJS)
 example: example.o libvncauth/libvncauth.a libvncserver.a
 	$(CC) -o example example.o $(LIBS) $(PTHREAD_LIBS)
 
+pnmshow: pnmshow.o libvncauth/libvncauth.a libvncserver.a
+	$(CC) -o pnmshow pnmshow.o $(LIBS) $(PTHREAD_LIBS)
+
 OSXvnc-server: mac.o libvncauth/libvncauth.a libvncserver.a
 	$(CC) -o OSXvnc-server mac.o $(LIBS) $(OSX_LIBS)
 

example.c

@@ -145,6 +145,7 @@ int main(int argc,char** argv)
   initBuffer(rfbScreen->frameBuffer);
 
   /* this is the blocking event loop, i.e. it never returns */
+  /* 40000 are the microseconds, i.e. 0.04 seconds */
   runEventLoop(rfbScreen,40000,FALSE);
 
   /* this is the non-blocking event loop; a background thread is started */

main.c

@@ -276,7 +276,7 @@ processArguments(rfbScreenInfoPtr rfbScreen,int argc, char *argv[])
         } else if (strcmp(argv[i], "-dontdisconnect") == 0) {
             rfbScreen->rfbDontDisconnect = TRUE;
         } else {
-            usage();
+	  /* usage(); we no longer exit for unknown arguments */
         }
     }
 }

pnmshow.c

+#include <stdio.h>
+#include "rfb.h"
+#define XK_MISCELLANY
+#include "keysymdef.h"
+
+void HandleKey(Bool down,KeySym key,rfbClientPtr cl)
+{
+  if(down && (key==XK_Escape || key=='q' || key=='Q'))
+    rfbCloseClient(cl);
+}
+
+int main(int argc,char** argv)
+{
+  FILE* in=stdin;
+  int i,width,height;
+  unsigned char buffer[1024];
+  rfbScreenInfoPtr rfbScreen;
+
+  if(argc>1) {
+    in=fopen(argv[1],"rb");
+    if(!in) {
+      printf("Couldn't find file %s.\n",argv[1]);
+      exit(1);
+    }
+  }
+
+  fgets(buffer,1024,in);
+  if(strncmp(buffer,"P6",2)) {
+    printf("Not a ppm.\n");
+    exit(2);
+  }
+
+  /* skip comments */
+  do {
+    fgets(buffer,1024,in);
+  } while(buffer[0]=='#');
+
+  /* get width & height */
+  sscanf(buffer,"%d %d",&width,&height);
+  fprintf(stderr,"Got width %d and height %d (%s).\n",width,height,buffer);
+  fgets(buffer,1024,in);
+
+  /* initialize data for vnc server */
+  rfbScreen = rfbDefaultScreenInit(argc,argv,width,height,8,3,4);
+  if(argc>1)
+    rfbScreen->desktopName = argv[1];
+  else
+    rfbScreen->desktopName = "Picture";
+  rfbScreen->rfbAlwaysShared = TRUE;
+  rfbScreen->kbdAddEvent = HandleKey;
+
+  /* allocate picture and read it */
+  rfbScreen->frameBuffer = (char*)malloc(width*height*4);
+  fread(rfbScreen->frameBuffer,width*3,height,in);
+
+  /* correct the format to 4 bytes instead of 3 */
+  for(i=width*height-1;i>=0;i--) {
+    rfbScreen->frameBuffer[i*4+3]=rfbScreen->frameBuffer[i*3+2];
+    rfbScreen->frameBuffer[i*4+2]=rfbScreen->frameBuffer[i*3+1];
+    rfbScreen->frameBuffer[i*4+1]=rfbScreen->frameBuffer[i*3+0];
+  }
+
+  /* run event loop */
+  runEventLoop(rfbScreen,40000,FALSE);
+
+  return(0);
+}