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/* $Log: pktopxl.c,v $
* Revision 0.8 92/11/23 19:46:53 19:46:53 bt (Bo Thide')
* Fixed resolution bug. Portable downloading. Added/changed options. PJXL color support
*
* Revision 0.7 92/11/13 02:41:38 02:41:38 bt (Bo Thide')
* More bug fixes and improvements. Support for PaintJet XL
*
* Revision 0.6 92/11/10 21:48:35 21:48:35 bt (Bo Thide')
* Bug fixes. Added -R option. Better font handling.
*
* Revision 0.5 92/11/09 16:25:42 16:25:42 bt (Bo Thide')
* Rewrite of dospecial.c. Extended \special support
*
* Revision 0.4 92/11/08 02:45:58 02:45:58 bt (Bo Thide')
* Changed to portable bit manipulations. Replaced strrstr for non-POSIX compliant C. Fixed numerous bugs. Added support for more \special's.
*
* Revision 0.3 92/08/24 12:45:48 12:45:48 bt (Bo Thide')
* Fixed 8 bit (dc font) support.
*
* Revision 0.2 92/08/23 17:28:59 17:28:59 bt (Bo Thide')
* Source cleaned up. Changed certain function calls. Removed globals.
*
* Revision 0.1 92/08/22 23:58:48 23:58:48 bt (Bo Thide')
* First Release.
* */
int repeat_count;
#include <stdio.h>
#include "globals.h"
static char rcsid[] = "$Header: pktopxl.c,v 0.8 92/11/23 19:46:53 bt Exp $";
/*
* This routine converts a character coded in PK format into the appropriate
* byte aligned pixel pattern. After calling 'pkcharinfo(c)', besides the
* global variables 'dyn_f, c_flag, c_width, c_height, c_hoffset and c_voffset'
* a pointer to the first run count is returned and stored in the global var
* 'pk_ptr'. The produced pixel pattern is stored in the global array
* 'pxl_buffer', and the global pointer 'endofchardata' points to the next free
* byte in 'pxlbuffer'.
*----------------------------------------------------------------------------
* 'pktopxl' has two main branches: for those characters which are coded into
* run-repeat counts, indicated by a value of dyn_f < 14, the first branch is
* taken, while for bit mapped characters, indicated by dyn_f == 14, the
* second branch is taken.
*/
pktopxl(c)
int c;
{
static byte c_pad[]={'\0','\200','\300','\340','\360','\370','\374','\376'};
byte *pxl, *row="", *p;
byte pxl_byte;
int pad_bits, pad_comp;
int pad_mask;
int width_bytes;
int nrows,length;
int l, m=0, n=0;
int run_count;
pk_ptr = pkcharinfo(c);
nrows = c_height;
width_bytes = (c_width + 7) / 8;
pad_bits = c_width % 8;
pad_mask = c_pad[pad_bits];
pxl = pxlbuffer;
if(dyn_f<14){
/* Convert run/repeat counts to byte aligned pixels */
run_count = repeat_count = 0;
c_nib = 0;
c_black = (c_flag & 0x8) ? 0 : ~0;
while(nrows) {
if(repeat_count) {
while(repeat_count) {
repeat_count--;
m = width_bytes;
while(m--)
*pxl++ = *row++;
nrows--;
}
}
else {
if(!run_count)
run_count = pknum();
if(run_count >= c_width)
while(run_count >= c_width) {
run_count -= c_width;
m = pad_bits ? width_bytes : width_bytes + 1;
while(--m)
*pxl++ = c_black ? BLACKBYTE : WHITEBYTE;
if(pad_bits)
*pxl++ = c_black ? pad_mask : WHITEBYTE;
nrows--;
}
else {
row = pxl;
m = pad_bits ? width_bytes : width_bytes + 1;
while(--m) {
if(run_count < 8) {
pxl_byte = c_black ? c_pad[run_count] : ~c_pad[run_count];
while((run_count += pknum()) < 8)
if(c_black)
pxl_byte &= c_pad[run_count];
else
pxl_byte |= ~c_pad[run_count];
*pxl++ = pxl_byte;
}
else
*pxl++ = c_black ? BLACKBYTE : WHITEBYTE;
run_count -= 8;
}
if(pad_bits) {
if(run_count < pad_bits) {
pxl_byte = c_black ? c_pad[run_count] : ~c_pad[run_count];
while((run_count += pknum()) < pad_bits)
if(c_black)
pxl_byte &= c_pad[run_count];
else
pxl_byte |= ~c_pad[run_count];
*pxl++ = pxl_byte & pad_mask;
}
else
*pxl++ = c_black ? pad_mask : WHITEBYTE;
}
nrows--;
run_count -= pad_bits;
}
}
}
}
else {
/* Convert bit mapped character into byte aligned pixel */
p = pk_ptr;
pad_comp = 8 - pad_bits;
if(pad_bits) {
m=0;
while(nrows--) {
l = width_bytes;
while(--l)
*pxl++ = m ? (*p++) << m | (*p >> n) & ~c_pad[n] : *p++;
if(m)
*pxl++ = m <= pad_comp ? (*p << m) & pad_mask :
(*p++) << m | *p >> n & ~c_pad[n] & pad_mask;
else
*pxl++ = *p & pad_mask;
m = (m + c_width) % 8;
if(!m)
p++;
else
n = 8 - m;
}
}
else {
length = width_bytes*c_height;
if(!length)
*pxl++ = 0; /* special case for empty char */
while(length--)
*pxl++ = *p++;
}
}
endofchardata = pxl;
}
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