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Add option to output packed or hgr bits

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Michaelangel007 2017-07-16 09:27:36 -07:00
parent da234569c9
commit 839c0931bc
1 changed files with 25 additions and 5 deletions
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30
ascii2hgr2bit.c
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@ -18,6 +18,7 @@ Michaelangel007
https://github.com/deater/linux_logo/blob/master/logos/banner.logo
*/
int gbOutputHgr = 0;
unsigned char gaLogoBits[ 280 / 2 * 192 / 8 ]; // packed bits
const char* gaLogo70 =
@ -41,7 +42,7 @@ Bitpacked 2-bits/2 pixels
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17.5
<--><--><--><--><--><--><--><--><--><--><--><--><--><--><--><--><--><-->
*/
#if 0
#if 1
"__________________________________________________________@@@@@_______"
"_________________________________________________________@@@@@@@______"
"______________A__________________________________________@@_@_@@______"
@ -55,16 +56,26 @@ Bitpacked 2-bits/2 pixels
"__@@____@@_AA@_@_@@_____@@__@@@___@@@____@@___@@___BBBBBB@_____@BBBBBB"
"@@@@@@@@@@__@@@_@@@@___@@@@___@@@@_@@@_@@@@@_@@@@@__BBBBB@@@@@@@BBBBB_"
#else
"@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-@-"
// _@_@_@_@_@_@_@ = PACK: $33,$33,$33,$33 -> HGR: $33,$66,$4C,$19 (MSB=0)
// = HGR: $B3,$E6,$CC,$99 (MSB=1)
//"_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@"
// @_@_@_@_@_@_@_ = HGR: $4C,$19,$33,$66 (MSB=0)
// = PACK: $CC,$CC,$CC,$CC -> HGR: $CC,$99,$B3,$E6 (MSB=1)
//"@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_@_"
#endif
;
int main( const int nArg, const char *aArg[] )
{
(void) aArg;
if( nArg > 1 )
gbOutputHgr = 1;
const char *src = gaLogo70;
unsigned char *dst = gaLogoBits;
unsigned char bit = 0;
unsigned int bit = 0;
unsigned char shl = 0;
unsigned int len = 0;
unsigned int i;
@ -74,13 +85,22 @@ int main( const int nArg, const char *aArg[] )
bit |= (*src & 3) << shl;
shl += 2;
if( gbOutputHgr )
{
if( shl >= 8 )
{
shl -= 7 ;
*dst++= (0x80 | bit);
bit >>= 7;
}
} else {
if( shl >= 8 )
{
shl -= 8 ;
*dst++ = bit;
*dst++= bit;
bit = 0;
}
}
src++;
}