lg31of.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

				syslog(LOG_INFO,"Failed to use image colormap");
				return(1);
			}
			if(im.format != ITS) {
				/* do RGB to YIQ conversion */
				tmpptr=cmpptr;
				for(i=0;i!=256;i++) {
					tmp=tmpptr;
					temp= *tmpptr * .30;
					tmpptr++;
					temp+= *tmpptr * .59;
					tmpptr++;
					temp+= *tmpptr * .11;
					tmpptr++;
					*tmp=(255-temp);
				}
			}
			error = readXimgdat();
			if(error) {
				syslog(LOG_INFO,"Failed to use image data");
				return(1);
			}
			if(im.spbxnm > MAXP_PIX_WIDTH) {
				fprintf(output,"\033[11h\033[7 I");
				fprintf(output,"\033[?21 J");
				fprintf(output,"\033[?52l");
				fprintf(output,"\033[1;3150s");
				fprintf(output,"\033P9;0;10q\"1;1-");
				rotated++;
				if(im.spbxnm > MAXL_PIX_WIDTH) {
					im.spbxnm = MAXL_PIX_WIDTH;
				}
				if(im.spbynm > MAXL_PIX_WIDTH) {
					tmppagecount = im.spbynm/MAXP_PIX_WIDTH;
					tmplinecount = MAXP_PIX_WIDTH;
				}
			}
			if(im.spbxnm <= MAXP_PIX_WIDTH) {
				fprintf(output,"\033[11h\033[7 I");
				fprintf(output,"\033[?20 J");
				fprintf(output,"\033[?52l");
				fprintf(output,"\033[1;2400s");
				fprintf(output,"\033P9;0;10q\"1;1-");
				if(im.spbynm > MAXP_PIX_HEIGHT) {
					tmppagecount = im.spbynm/MAXP_PIX_HEIGHT;
					tmplinecount = MAXP_PIX_HEIGHT;
				}
			}
			error = dosixel();
			if(error) {
				syslog(LOG_INFO,"Failed to 'sixelize' data");
				fprintf(output, "\033\\");
				fprintf(output, "\033c");
				sleep(5);
				fprintf(output, "\014");
				fflush(output);
				return(1);
			}
			break;
		case TEXT_FILE:
		case CTEXT_FILE:
		case ATEXT_FILE:
		case RTEXT_FILE:
		case FTEXT_FILE:
		default:
			for (cp = buf[0], limit = buf[MAXREP]; cp < limit; *cp++ = ' ');
			done = 0;

			escflg = 0;		/* is escape/control sequence in progress? */
			globi = 0;
                        while (!done) {
                            col = indent;
                            esclen = 0;
                            maxrep = -1;
                            linedone = 0;
                            while (!linedone) {
                                ch = globi < in ? filestorage[globi++] : getc(input);
                                if (((escflg==0)&&(ch==ESC))||escflg)
                                        eschdl(output,ch);   /* deal with escape character */
                                else 
                                      /* chetal: literal code added follows */
                                      if ( literal && iscntrl(ch) && ( (ch != '\n')
                                            && (ch != EOF) ) ){
                                          cp = &buf[0][col];    /* Since literal mode..everything is the
                                                   first row itself.*/
                                          maxrep = 0;
                                          if (is_7bit_cntrl(ch)){
						if (ch == 0177){
							*cp++ = '^';
							*cp   = '?';
							col ++;
						} else{ /* It is < 040 */
                                              		*cp++ = '^';
	                                                *cp   = ch + '@';
         	                                        col ++;
                  	                        }
                                          } else{ /* It is 8bit cntrl */
						if ((unsigned char)ch < 0240){
                                                        *cp++ = 'M';
                                                        *cp++ = '-';
							ch   &= 0177;
                                                        *cp   = ch + '@';
                                                        col  += 2;
						} else {
                                                        *cp++ = 'M';
                                                        *cp++ = '-';
                                                        *cp   = '?';
                                                        col  += 2;
						}
					  }
                                          if ( col > maxcol[0] )
                                              maxcol[0] = col;
                                          col++; /* col points to next blank entry in buf */
                                      }
                                      else { /* regular characters */
                                          switch (ch) {
                                          case EOF:
                                                          linedone = done = 1;
                                                  ch = '\n';
                                                  break;
  
                                          case '\f':                /* new page on form feed */
                                                  lineno = length;
                                          case '\n':                /* new line */
                                                  if (maxrep < 0)
                                                          maxrep = 0;
                                                  putc('\r',output);   /* LITOUT eight bit fix */
                                                  linedone = 1;
                                                  break;
  
                                          case '\b':                /* backspace */
                                                  if (--col < indent)
                                                          col = indent;
                                                  break;
  
                                          case '\r':                /* carriage return */
                                                  col = indent;
                                                  break;
  
                                          case '\t':                /* tab */
                                                  col = ((col - indent) | 07) + indent + 1;
                                                  break;
  
                                          case '\031':                /* end media */
                                                  /*
                                                  * lpd needs to use a different filter to
                                                  * print data so stop what we are doing and
                                                  * wait for lpd to restart us.
                                                  */
                                                  ch = globi < in ? filestorage[globi++] : getc(input);
                                                  if (ch == '\1') {
                                                          fflush(output);
                                                          kill(getpid(), SIGSTOP);
                                                          break;
                                                  } else {
                                                          if(globi <= in) {
                                                                  globi--;
                                                          } else {
                                                                  ungetc(ch, input);
                                                          }
                                                          ch = '\031';
                                                  }
  
                                                  default:   /* everything else */
                                                          addtobuf(ch);
                                                          break;
                                                  } /* end switch */
                                    } /* end else */

                            } /* end while not linedone */

                            /* print out lines */
                            for (i = 0; i <= maxrep; i++) {
                                    for (cp = buf[i], limit = cp+maxcol[i]; cp <= limit;) {
                                            putc(*cp, output);
                                            *cp++ = ' ';
                                    }
                                    if (i < maxrep)
                                            putc('\r', output);
                                    else
                                            putc(ch, output);
                                    if (++lineno >= length) {
                                            npages++;
                                            lineno = 0;
                                            if (length < 66)
                                                    putc('\f',output);  /* FF for length < 66 */
                                    }
                                    maxcol[i] = -1;
                            }
                        }
			if (lineno) {		/* be sure to end on a page boundary */
				putc('\f',output);
				npages++;
			}  
			fprintf(output,"\033\143");  /* reset printer defaults */
			fflush(output);		     /* make sure reset goes out */
			sleep(6);		/* some printers eat lines during reset so wait */
			break;
		}
	return(0);
}

/****************************************************************
  Adds the character specified to buffer - if it will fit on line
*****************************************************************/

addtobuf (ch)
register char      ch;
{
	register char  *cp;
        int  i;

        if ((col >= (width + esclen) || iscntrl(ch)) && ch != ESC){
                  col++;
                  return(0);
        }
        cp = &buf[0][col];
        for (i = 0; i < MAXREP; i++) {
                  if (i > maxrep)
                          maxrep = i;
                  if (*cp == ' ') {
                          *cp = ch;
                          if (col > maxcol[i])
                                  maxcol[i] = col;
                          break;
                  }
                  cp += BUFWIDTH;
        }
        col++;
        return(1);
}

/****************************************************************/
/*								*/
/*	eschdl - escape sequence handler			*/
/*								*/
/*	This routine intercepts escape sequences for the purpose*/
/*	of pass through.					*/
/*								*/
/****************************************************************/
eschdl(o,c)
int c;
FILE  *o;
{

if(escflg==0)
	{		/* set escflg=1 => ready to receive 2nd seqchar*/
	escflg=1;
	}
else	switch(escflg)
		{
		case 1:		/* second character of escseq		*/
			switch(c)
				{
				case E_NINE: /* added to buffer - hopefully in the correct place */
                                        addtobuf (ESC);
                                        addtobuf (PLD);
                                        esclen += 2;
                                        escflg = 0;
                                        break;
				case E_EIGHT: /* added to buffer - hopefully in the correct place */
                                        addtobuf (ESC);
                                        addtobuf (PLU);
                                        esclen += 2;
                                        escflg = 0;
                                        break;
				case E_SEVEN: /* added to buffer - hopefully in the correct place */
                                        addtobuf (ESC);
                                        addtobuf (FLU);
                                        esclen += 2;
                                        escflg = 0;
                                        break;
				case UCP:
					escflg=2; /*ctrl str pass thru mode=8 */
					lstchr=c;
					putc(ESC,o);
					putc(c,o);
					break;
				default:
					escflg=3;  /* set seq pass thru mode*/
					putc(ESC,o);
					putc(c,o);
					break;
				}
			break;
		case 2:		/* ctrl string pass through mode	*/
			if((lstchr==ESC) && (c==BSLH))
				{
				escflg=0;
				lstchr=0;
				}
			else lstchr=c;	/* save it for next pass */
			putc(c,o);
			break;
		case 3:
			if(escend(c))
				escflg=0;/* turn off esc handler if at end  */
			putc(c,o);
			break;
		}
return(0);
}

/* If the file stream is of the XIMAGE_FILE type this routine is called
   from lg31of.  The routine creates a sixel output stream to send
   the printer based on the input data from an image file. Currently,
   only a frame buffer image of raw red, green, blue points or a
   GPX workstation "savimg"  image are valid data streams.  Sixel
   output is initialized and then the processing begins.
   The current design of the algorithm dithers the data to a 3 x 3 matrix
   of points using the structure sixmap.
*/
dosixel()
{
	register int i;
	int xcnt,ycnt,n = 1,iindex,ij=0;
	unsigned char	*srcptr;
	unsigned char	*nxtptr;
	unsigned short sl;
	unsigned int	temp;
	struct sixmap *Sixmap;
	struct sixmap *Sixmap_offset;
	char *base_band,*pb;
	int base_band_length = 0;
	int count = 1;
	char lastc = 0;
	register char *cp;





	srcptr=(unsigned char *)imgptr;
	ycnt=im.spbynm;
	if(im.format != ITS)
		nxtptr=srcptr+im.spbxnm * n;
	else
		nxtptr=srcptr+(im.spbxnm * n * 3);
	pb = base_band = (char *)malloc((unsigned) 6 * im.spbxnm);
	Sixmap = base_sixmap;
	Sixmap_offset = offset_sixmap;
	while((ycnt/n) * n) {
		xcnt=im.spbxnm;
		base_band_length = 0;
		base_band = pb;
		while(xcnt>0) {
			if(MAXL_PIX_WIDTH - xcnt < 0) {
				if(im.format != ITS)
					srcptr+=n;
				else
					srcptr+=n*3;
				xcnt-=n;
				continue;
			}
			if(im.format != ITS) {
				sl = *(cmpptr + 3*(*srcptr));
			} else {
				/* need to convert to YIQ */
				temp= *srcptr++ * .30;
				temp+= *srcptr++ * .59;
				temp+= *srcptr * .11;
				temp=(255-temp);
				sl = (unsigned short)temp;
			}
			iindex = (sl * 9) / 255;
			for(i=0;i<3;i++) {
				*(base_band+i) = SOFF;
			}
			if(!ij) {
				*base_band++ = Sixmap[iindex].s0;
				*base_band++ = Sixmap[iindex].s1;
				*base_band++ = Sixmap[iindex].s2;
			} else {
				*base_band++ = Sixmap_offset[iindex].s0;
				*base_band++ = Sixmap_offset[iindex].s1;
				*base_band++ = Sixmap_offset[iindex].s2;
			}
			base_band_length+=3;
			srcptr+=n;
			xcnt-=n;
		}
		if(!ij) {
			cp = pb;
			lastc = *cp++;
			for(i=0;i < base_band_length;i++) {
			    if(*cp != lastc) {
				if(count >= 4)
				    fprintf(output,"!%d%c",count,lastc);
				else
				    while(count--)putc(lastc,output);
				count = 1;
				lastc = *cp;
			    } else count++;
			    cp++;
			}
			fprintf(output,"$");
			count = 1;
			ij++;
		} else {
			cp = pb;
			lastc = *cp++;
			for(i=0;i < base_band_length;i++) {
				if(*cp != lastc) {
					if(count >= 4)
					    fprintf(output,"!%d%c",count,lastc);
					else
					    while(count--)
						    putc(lastc,output);
					count = 1;
					lastc = *cp;
				} else
					count++;
				cp++;
			}
			count = 1;
			ij = 0;
			fprintf(output,"-");
		}
	srcptr=nxtptr;
	if(im.format != ITS)
		nxtptr=srcptr+im.spbxnm * n;
	else
		nxtptr=srcptr+(im.spbxnm * n * 3);
	ycnt-= n;
	
	if(tmppagecount) {
		tmplinecount--;
		if(tmplinecount == 0) {
			fprintf(output,"+");
			tmppagecount--;
			if(im.spbxnm >= MAXL_PIX_WIDTH) {
				if(im.spbynm > MAXL_PIX_WIDTH) {
					tmplinecount = MAXP_PIX_WIDTH;
				}
			}
			if(im.spbxnm <= MAXP_PIX_WIDTH) {
				if(im.spbynm > MAXP_PIX_HEIGHT) {
					tmplinecount = MAXP_PIX_HEIGHT;
				}
			}
		}
	}
	}
	fprintf(output,"+");
	fprintf(output,"\033\\");
	return(0);
}

readXimghdr()
{
	register int tmp;

	size=HEDLEN*512;
	bcopy(filestorage+globi, (char *)&im, (int)size);
	globi = globi + size;
	if(im.imgflg != IMGFLG)
		return(1);
	if(im.format != QDSS || im.spbgnm != 1) {
		if(im.format != ITS)
			return(1);
	}
	if(im.format == ITS) {
		tmp = im.spbxnm;
		im.spbxnm = im.spbynm;
		im.spbynm = tmp;
		im.spblen = im.spblen * 3;
	}
	return(0);
}

readXimgcmp()
{
	if(im.format == ITS)
		return(0);
	size=im.cmplen*512;
	if(size==0)
		return(1);
	if((cmpptr=(short *) malloc(size))==NULL)
		return(1);
	bcopy(filestorage+globi, (char *)cmpptr, (int)size);
	globi = globi + size;
	return(0);
}

readXimgdat()
{
	size=im.spblen*512;
	if((imgptr=(char *) malloc(size))==NULL)
		return(1);
	bcopy(&filestorage[globi],imgptr,in-globi);
	fread(imgptr+(in-globi), (char)size-(in-globi), 1, input);
	return(0);
}