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Add 2 bit hgr packer

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Michaelangel007 2017-07-16 08:27:38 -07:00
commit da234569c9
1 changed files with 103 additions and 0 deletions
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ascii2hgr2bit.c Normal file
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/*
Michaelangel007
6502 Linux Logo
*/
#include <stdio.h>
/*
Cleaned up crappy logo by Albert Lai <aylai@unixg.ubc.ca>
* Width is now 70 chars to be exact 4 pixels/char for 280 resolution
* X is now symmetrical
* Fixed L,i,n kerning
* Fixed x Penguin kerning
* Fixed L to fit
* Chopped off 2 columsn of penguin to fit 70 chars
https://github.com/deater/linux_logo/blob/master/logos/banner.logo
*/
unsigned char gaLogoBits[ 280 / 2 * 192 / 8 ]; // packed bits
const char* gaLogo70 =
/*
ASCII:
70 chars * 12 scanlines = 840 bytes
Bitpacked 1-bit/4 pixels
Bitpacked 2-bits/2 pixels
70 chars * 2 bits/char / 8 bits/byte = 17.5 bytes / scanline
17.5 bytes/scanline * 12 scanlines = 210 bytes
Char &3 Color
@ 00 Black
A 01 Blue
B 10 Orange
_ 11 White
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17.5
<--><--><--><--><--><--><--><--><--><--><--><--><--><--><--><--><--><-->
*/
#if 0
"__________________________________________________________@@@@@_______"
"_________________________________________________________@@@@@@@______"
"______________A__________________________________________@@_@_@@______"
"@@@@@@_______AA@_________________________________________@BBBBB@______"
"__@@__________@________________________________________@@__BBB__@@____"
"__@@_______AAA__@@@_@@@@___@@@____@@@__@@@@@_@@@@@____@__________@@___"
"__@@______A__A@__@@@____@@__@@_____@@____@@___@@_____@____________@@__"
"__@@_____A___A@__@@_____@@__@@_____@@_____@@_@@______@____________@@@_"
"__@@________AA@__@@_____@@__@@_____@@______@@@______BB@___________@@B_"
"__@@_____@_AA@___@@_____@@__@@_____@@_____@@_@@____BBBBB@_______@BBBBB"
"__@@____@@_AA@_@_@@_____@@__@@@___@@@____@@___@@___BBBBBB@_____@BBBBBB"
"@@@@@@@@@@__@@@_@@@@___@@@@___@@@@_@@@_@@@@@_@@@@@__BBBBB@@@@@@@BBBBB_"
#else
"@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-"
#endif
;
int main( const int nArg, const char *aArg[] )
{
const char *src = gaLogo70;
unsigned char *dst = gaLogoBits;
unsigned char bit = 0;
unsigned char shl = 0;
unsigned int len = 0;
unsigned int i;
while( *src )
{
bit |= (*src & 3) << shl;
shl += 2;
if( shl >= 8 )
{
shl -= 8 ;
*dst++ = bit;
bit = 0;
}
src++;
}
len = (unsigned int)(dst - gaLogoBits);
printf( " dfb $%02X\n", len );
for( i = 0; i < len; i++ )
{
if( (i % (70 / 2)) == 0 )
{
if( i > 0 )
printf( "\n" );
printf( " dfb " );
}
printf( "$%02X,", gaLogoBits[ i ] );
}
printf( "\n" );
return 0;
}