info-mac@uw-beaver (info-mac) (07/29/84)
From: Ed Pattermann <PATTERMANN@SUMEX-AIM.ARPA>
Here is the UNIX/C version of MACIMP (also on {SUMEX-AIM}<INFO-MAC>MACIMP.C).
Thanks to Dan Winkler of Harvard for this version.
---------
/*
This filter converts MacPaint files into Impress files
for printing on an Imagen laser printer. Based on MACimp
for Tops-20 by Ed Pattermann, Stanford.
Usage: macimp < macdoc.mp | ipr
Send enhancements and bug reports to winkler@harvard.
History:
25 July 1984 Winkler created.
27 July 1984 Burgess (sumex-aim): modified write_imp_init()
code to reflect appropriate owner and spooldate.
*/
#include <stdio.h>
#include <strings.h>
#define MAG_POWER 1 /* can be 0, 1, or 2 */
#define DOTS_PER_INCH 240
#define OPAQUE 3
#define OPERATION_TYPE OPAQUE
#define HSIZE 18
#define VSIZE 23
#define MAC_HEADER_LENGTH 512
#define PAD_BYTES 1152
#define LOBYTE(number) ((char)(number & 0x00FF))
#define HIBYTE(number16) ((char)((number16 >> 8) & 0x00FF))
#define PATCH_SIZE 32
#define PATCH_BYTES 4
typedef char patch[ PATCH_SIZE ][ PATCH_BYTES ] ;
main()
{
write_imp_init() ;
throw_away_mac_header() ;
process_data() ;
write_imp_end() ;
fflush(stdout) ;
}
process_data()
{
int data_byte ; short repeat_count, byte_num ;
while ( (data_byte = getchar()) != EOF )
{
if ( data_byte > 127 )
{
repeat_count = 256 - data_byte + 1 ;
data_byte = getchar() ;
for (byte_num = 0 ; byte_num < repeat_count ; byte_num ++ )
add_byte ( (char) data_byte ) ;
}
else
{
repeat_count = data_byte + 1 ;
for ( byte_num = 0 ; byte_num < repeat_count ; byte_num ++ )
add_byte ( (char) getchar() ) ;
}
}
for ( byte_num = 0 ; byte_num < PAD_BYTES ; byte_num ++ )
add_byte ( (char) 0 ) ;
}
add_byte( one_byte )
char one_byte ;
{
static patch patches[ HSIZE ] ;
static short patch_num = 0 ;
static short patch_row = 0 ; static short patch_col = 0 ;
patches[ patch_num ][ patch_row ][ patch_col ] = one_byte ;
if ( ++ patch_col >= PATCH_BYTES )
{
patch_col = 0 ;
if ( ++ patch_num >= HSIZE )
{
patch_num = 0 ;
if ( ++ patch_row >= PATCH_SIZE )
{
patch_row = 0 ;
write_patches ( patches ) ;
}
}
}
}
write_patches ( patches )
patch * patches ;
{
short patchnum, patchrow, patchcol ;
for ( patchnum = 0 ; patchnum < HSIZE ; patchnum ++ )
for ( patchrow = 0 ; patchrow < PATCH_SIZE ; patchrow ++ )
for ( patchcol = 0 ; patchcol < PATCH_BYTES ; patchcol ++ )
putchar( patches[ patchnum ][ patchrow ][ patchcol ] ) ;
}
throw_away_mac_header()
{
short bytenum ;
for ( bytenum = 0 ; bytenum < MAC_HEADER_LENGTH ; bytenum ++ )
( void ) getchar() ;
}
write_imp_init()
{
char *getenv();
char *ctime(), cimptime[26];
long time(), imptime;
imptime = time(0); /* get time in internal form */
strcpy (cimptime, ctime(&imptime));/* put time in string form */
cimptime[24] = '\0'; /* nullify \n in time string */
printf("@DOCUMENT(LANGUAGE IMPRESS, NAME \"MacPaint Document\"") ;
printf(", OWNER \"%s\"",getenv("USER"));
printf(", SPOOLDATE \"%s\")",cimptime);
/* SET_ABS_H */
putchar( (char) 135 ) ;
putchar( HIBYTE( (short) DOTS_PER_INCH )) ;
putchar( LOBYTE( (short) DOTS_PER_INCH )) ;
/* SET_ABS_V */
putchar( (char) 137 ) ;
putchar( HIBYTE( (short) DOTS_PER_INCH )) ;
putchar( LOBYTE( (short) DOTS_PER_INCH )) ;
/* SET_MAGNIFICATION */
putchar( (char) 236 ) ; putchar( (char) MAG_POWER ) ;
/* BITMAP */
putchar( (char) 235 ) ; putchar( (char) OPERATION_TYPE ) ;
putchar( (char) HSIZE ) ; putchar( (char) VSIZE ) ;
}
write_imp_end()
{
/* ENDPAGE */
putchar( (char) 219 ) ;
/* EOF */
putchar( (char) 255 ) ;
}
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