LibVNCServer/LibVNCClient
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pnmshow.c
#include <stdio.h>
#include <rfb/rfb.h>
#include <rfb/keysym.h>
#ifndef HAVE_HANDLEKEY
static void HandleKey(rfbBool down,rfbKeySym key,rfbClientPtr cl)
{
if(down && (key==XK_Escape || key=='q' || key=='Q'))
}
#endif
int main(int argc,char** argv)
{
FILE* in=stdin;
int i,j,k,l,width,height,paddedWidth;
char buffer[1024];
rfbScreenInfoPtr rfbScreen;
enum { BW, GRAY, TRUECOLOUR } picType=TRUECOLOUR;
int bytesPerPixel,bitsPerPixelInFile;
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)) {
picType=TRUECOLOUR;
bytesPerPixel=4; bitsPerPixelInFile=3*8;
} else if(!strncmp(buffer,"P5",2)) {
picType=GRAY;
bytesPerPixel=1; bitsPerPixelInFile=1*8;
} else if(!strncmp(buffer,"P4",2)) {
picType=BW;
bytesPerPixel=1; bitsPerPixelInFile=1;
} else {
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);
rfbLog("Got width %d and height %d.\n",width,height);
if(picType!=BW)
fgets(buffer,1024,in);
else
width=1+((width-1)|7);
/* vncviewers have problems with widths which are no multiple of 4. */
paddedWidth = width;
if(width&3)
paddedWidth+=4-(width&3);
/* initialize data for vnc server */
rfbScreen = rfbGetScreen(&argc,argv,paddedWidth,height,8,(bitsPerPixelInFile+7)/8,bytesPerPixel);
if(!rfbScreen)
return 0;
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*bytesPerPixel*height);
fread(rfbScreen->frameBuffer,width*bitsPerPixelInFile/8,height,in);
fclose(in);
if(picType!=TRUECOLOUR) {
rfbScreen->serverFormat.trueColour=FALSE;
rfbScreen->colourMap.count=256;
rfbScreen->colourMap.is16=FALSE;
rfbScreen->colourMap.data.bytes=malloc(256*3);
for(i=0;i<256;i++)
memset(rfbScreen->colourMap.data.bytes+3*i,i,3);
}
switch(picType) {
case TRUECOLOUR:
/* correct the format to 4 bytes instead of 3 (and pad to paddedWidth) */
for(j=height-1;j>=0;j--) {
for(i=width-1;i>=0;i--)
for(k=2;k>=0;k--)
rfbScreen->frameBuffer[(j*paddedWidth+i)*4+k]=
rfbScreen->frameBuffer[(j*width+i)*3+k];
for(i=width*4;i<paddedWidth*4;i++)
rfbScreen->frameBuffer[j*paddedWidth*4+i]=0;
}
break;
case GRAY:
break;
case BW:
/* correct the format from 1 bit to 8 bits */
for(j=height-1;j>=0;j--)
for(i=width-1;i>=0;i-=8) {
l=(unsigned char)rfbScreen->frameBuffer[(j*width+i)/8];
for(k=7;k>=0;k--)
rfbScreen->frameBuffer[j*paddedWidth+i+7-k]=(l&(1<<k))?0:255;
}
break;
}
/* initialize server */
rfbInitServer(rfbScreen);
/* run event loop */
rfbRunEventLoop(rfbScreen,40000,FALSE);
return(0);
}