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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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vol_200
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238_01
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size.c
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1987-07-26
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#include <stdio.h>
#include <fcntl.h>
#include <sys\types.h>
#include <io.h>
#include <sys\stat.h>
#include <stdlib.h>
#define ERROR (-1)
#define FONTID 51
struct fontspec {
unsigned char width,inkwidth,height;
signed char leftmargin;
unsigned char topline,cellheight;
};
struct fontspec fontinfo[256], outinfo[256];
unsigned char DOTVALUE[] =
{
0x0080, 0x0040, 0x0020, 0x0010, 0x0008, 0x0004, 0x0002, 0x0001
};
unsigned char bufi[4096], bufo[4096];
int infn,outfn, mode=0, option=0;
main(argc,argv)
int argc;
char *argv[];
{
int loop, count, ret;
char ch;
argv++;
while (argc-- > 1 && *(*argv)++=='-') {
if (**argv) {
ch= *(*argv)++;
ret=atoi(*argv);
} else {
ch=0;
}
switch(ch) {
case 's':
if (ret > 2) {
fprintf(stderr,"only 0, 1 or 2 can be used with -s\n");
exit(1);
}
option=ret;
break;
case 'o':
if (ret > 4) {
fprintf(stderr,"only 0 to 3 can be used with -o\n");
exit(1);
}
mode=ret;
break;
default:
fprintf(stderr,"Unknow option -%c ** IGNORED **\n",ch);
break;
}
argv++;
}
if (argc!=2) {
fprintf(stderr,"size: size [options] infile outfile\n\n");
fprintf(stderr,"Available options include:\n");
fprintf(stderr," -s0 reduce height to half\n");
fprintf(stderr," -s1 double the width\n");
fprintf(stderr," -s2 double the height\n\n");
fprintf(stderr,"-o option is used with reduction only\n");
fprintf(stderr," -o0 ink dominate\n");
fprintf(stderr," -o1 perfer ink\n");
fprintf(stderr," -o2 perfer space\n");
fprintf(stderr," -o3 space dominate\n");
exit(1);
}
(*argv)--;
if ((infn=open(argv[0],O_RDONLY | O_BINARY)) == ERROR) {
fprintf(stderr,"\nsize: Open file error -- %s\n",argv[0]);
exit(1);
}
if ((outfn=open(argv[1],O_CREAT | O_BINARY | O_TRUNC |O_WRONLY,
S_IREAD | S_IWRITE))
== ERROR) {
fprintf(stderr,"\nsize: Create file error -- %s\n",argv[1]);
exit(1);
}
if ((count=read(infn,bufi,256)) <= 0) {
errorexit:
fprintf(stderr,"Bad font file\n");
}
if (bufi[0]!=FONTID) goto errorexit;
for (loop=1; loop<=count; loop++) {
if (bufi[loop]==0) goto cont;
}
goto errorexit;
cont:
loop++;
lseek(infn,(long) loop, SEEK_SET);
if (read(infn,bufi,16) != 16) {
fprintf(stderr,"\n\nPremature EOF!\n");
goto cleanup;
}
switch(bufi[0]) {
case 0:
process0();
break;
case 1:
process1();
break;
default:
fprintf(stderr,"Invalid Font Type\n!");
}
cleanup:
close(infn);
close(outfn);
}
process0()
{
unsigned char temp1,temp2;
int loop1,loop2,nochar,charsize,outsize;
struct fontspec inspec, outspec;
inspec.width=bufi[5];
inspec.inkwidth=bufi[6];
inspec.height=bufi[7];
inspec.leftmargin=bufi[8];
inspec.topline=bufi[9];
inspec.cellheight=bufi[10];
chgspec(&inspec, &outspec);
bufo[0]=FONTID;
for (loop1=1;loop1<15;) bufo[loop1++]=' ';
for (loop1=15;loop1<32;) bufo[loop1++]=0;
for (loop1=16;loop1<27;loop1++) bufo[loop1]=bufi[loop1-16];
bufo[21]=outspec.width;
bufo[22]=outspec.inkwidth;
bufo[23]=outspec.height;
bufo[24]=outspec.leftmargin;
bufo[25]=outspec.topline;
bufo[26]=outspec.cellheight;
write(outfn,bufo,32);
nochar=bufi[1]+(bufi[2]<<8);
charsize=((inspec.inkwidth+7)>>3)*inspec.height;
outsize=((outspec.inkwidth+7)>>3)*outspec.height;
while (nochar--) {
if (read(infn,bufi,charsize)!=charsize) {
fprintf(stderr,"\n\nPremature EOF!\n");
goto cleanup;
}
size(&inspec,bufi,bufo);
write(outfn,bufo,outsize);
}
cleanup: ;
}
process1()
{
unsigned char temp1,temp2;
int loop1,loop2,nochar,charsize,outsize;
unsigned char *curptr;
long filesize;
bufo[0]=FONTID;
for (loop1=1;loop1<15;) bufo[loop1++]=' ';
for (loop1=15;loop1<32;) bufo[loop1++]=0;
for (loop1=16;loop1<24;loop1++) bufo[loop1]=bufi[loop1-16];
nochar=bufi[1]+(bufi[2]<<8);
if (read(infn,fontinfo,6*nochar)!=6*nochar) {
fprintf(stderr,"\n\nPremature EOF!\n");
goto cleanup;
}
filesize=0L;
for (loop1=0; loop1<nochar; loop1++) {
chgspec(&fontinfo[loop1],&outinfo[loop1]);
filesize+=(long)((outinfo[loop1].inkwidth+7)>>3)*outinfo[loop1].height;
}
bufo[21]=(unsigned char) (filesize & 0xff);
bufo[22]=(unsigned char) ((filesize>>8) & 0xff);
bufo[23]=(unsigned char) ((filesize>>16) & 0xff);
write(outfn,bufo,32);
if (write(outfn,outinfo,6*nochar)!=6*nochar) {
fprintf(stderr,"\nError writing File!\n");
goto cleanup;
}
for (loop1=0; loop1<nochar; loop1++) {
charsize=((fontinfo[loop1].inkwidth+7)>>3)*fontinfo[loop1].height;
outsize=((outinfo[loop1].inkwidth+7)>>3)*outinfo[loop1].height;
if (read(infn,bufi,charsize)!=charsize) {
fprintf(stderr,"\n\nPremature EOF!\n");
goto cleanup;
}
size(&fontinfo[loop1],bufi,bufo);
write(outfn,bufo,outsize);
}
cleanup: ;
}
chgspec(in,out)
struct fontspec *in, *out;
{
switch(option) {
case 0:
out->width=in->width;
out->inkwidth=in->inkwidth;
out->height=(in->height+1)>>1;
out->topline=(in->topline+1)>>1;
out->cellheight=(in->cellheight+1)>>1;
out->leftmargin=in->leftmargin;
break;
case 1:
out->width=in->width<<1;
out->inkwidth=in->inkwidth<<1;
out->height=in->height;
out->topline=in->topline;
out->cellheight=in->cellheight;
out->leftmargin=in->leftmargin*2;
break;
case 2:
out->width=in->width;
out->inkwidth=in->inkwidth;
out->height=in->height<<1;
out->topline=in->topline<<1;
out->cellheight=in->cellheight<<1;
out->leftmargin=in->leftmargin;
break;
}
}
size(spec,bufi,bufo)
struct fontspec *spec;
unsigned char *bufi, *bufo;
{
switch(option) {
case 0:
RH2to1(spec,bufi,bufo);
break;
case 1:
EW1to2(spec,bufi,bufo);
break;
case 2:
EH1to2(spec,bufi,bufo);
}
}
/* Reduce height in the ratio 2 to 1 */
RH2to1(spec,bufi,bufo)
struct fontspec *spec;
unsigned char *bufi, *bufo;
{
int loop1, loop2, count, wb, height;
unsigned int temp1, temp2;
wb=(spec->inkwidth+7)>>3; /* calculate width in byte */
height=spec->height;
if (height==0 || wb==0) return;
for (; height!=3 && height!=1 && height>0 ; height-=2, bufi+=wb) {
for (loop1=0; loop1 < wb ; loop1++, bufi++) {
switch(mode) {
case 0:
case 1:
*bufo++= *bufi | *(bufi+wb);
break;
case 2:
case 3:
*bufo++= *bufi & *(bufi+wb);
break;
}
}
}
if (height==1) {
for (loop1=0; loop1<wb; loop1++) *bufo++ = *bufi++;
} else {
for (loop1=0; loop1<wb; loop1++,*bufi++) {
switch(mode) {
case 0:
case 1:
*(bufo+wb)= *(bufi+wb) | *(bufi+wb+wb);
*bufo++ = *bufi | *(bufi+wb);
break;
case 2:
case 3:
*(bufo+wb)= *(bufi+wb) & *(bufi+wb+wb);
*bufo++ = *bufi & *(bufi+wb);
break;
}
}
}
}
/* Enlarge width in the ratio 1 to 2 */
EW1to2(spec,bufi,bufo)
struct fontspec *spec;
unsigned cha