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Improved matrix softfont DECDLD and optimized charsets changes. #3

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98 changes: 87 additions & 11 deletions bsd/screensavers/matrix.c
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Original file line number Diff line number Diff line change
Expand Up @@ -24,14 +24,6 @@
#define SCREEN_HEIGHT 24


/*
** Strings to load a VT220 softfont providing the extra Matrix characters, select it and unselect it.
** This softfont contains 46 mirrored katakana as ASCII !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMN
** The real term is a Dynamically Replaceable Character Sets (DRCS) loaded into the terminal's
** memory using a Down-Line-Loading DRCS (DECDLD) control string. The font is built using Sixels.
** Font design by Philippe Majerus, January 2025
*/
#define LOAD_MATRIX_SOFTFONT "\033P1;1;2{ MMQAyAAA\?/\?\?\?\?@A\?\?;\?ACwGOO\?/\?\?\?B\?\?\?\?;{CCECC[\?/\?@AAA\?\?\?;\?CC{CC\?\?/AAABAAA\?;CC}ScCC\?/\?\?B\?\?@A\?;{CCC}CC\?/@AAA\?@A\?;_gg}gg_\?/\?\?\?B\?\?\?\?;{CCCCMO\?/\?@AAA\?\?\?;CC{CCMO\?/\?\?\?@AA\?\?;{CCCCCC\?/BAAAAAA\?;C}CCC]C\?/\?\?@AAA\?\?;]_\?\?SSS\?/\?\?@AAAA\?;EIqaAAA\?/A@\?\?@AA\?;KSCCC}C\?/AAAAA@\?\?;Mo\?\?\?WE\?/\?\?@AAAA\?;{csSCMO\?/\?@AAAA\?\?;OQQ{SSO\?/\?\?\?@A\?\?\?;]_\?M\?\?M\?/\?\?@AAAA\?;GIIyIIG\?/\?\?\?@A\?\?\?;OOGG}\?\?\?/\?\?\?\?B\?\?\?;GGG}GGG\?/\?\?\?@AA\?\?;\?CCCCC\?\?/AAAAAAA\?;MQaQAAA\?/A@\?@AA\?\?;CkSecCC\?/@\?\?B\?@@\?;Mo\?\?\?\?\?\?/\?\?@@AAA\?;\?wC\?[_\?\?/B\?\?\?\?@A\?;CCCGGG}\?/AAAAAA@\?;]aAAAAA\?/\?\?@AAA\?\?;\?_OGCGO\?/@\?\?\?\?\?\?\?;CsC}CsC\?/@\?\?BA\?@\?;EIQaaQA\?/\?\?A@\?\?\?\?;CSQIII\?\?/AAA@@@@\?;\?o\?EW_\?\?/B@@AABA\?;MO_OG\?\?\?/A@\?@AAA\?;OQQQ}QO\?/AAAA@\?\?\?;WgGG}GG\?/\?\?@\?B\?\?\?;\?\?{CCC\?\?/AABAAAA\?;}QQQQQQ\?/BAAAAAA\?;WiIIIIG\?/\?\?@AAA\?\?;}\?\?\?\?\?]\?/\?@AAAA\?\?;_\?}\?\?}\?\?/\?@B\?\?@A\?;O_\?\?\?\?}\?/\?\?@@AAB\?;}AAAAA}\?/BAAAAAB\?;]aAAAAM\?/\?\?@AAA\?\?;]iIIIII\?/\?\?@AAA\?\?;]_\?\?CCC\?/\?\?@AAAA\?\033\\"
#define SELECT_MATRIX_SOFTFONT "\033( M"
#define UNSELECT_SOFTFONT "\033(B"

Expand All @@ -47,10 +39,86 @@ struct Trail {
struct Trail trails[MAX_TRAILS];
int trail_timer = 0;

/* Keep track of whether the Matrix softfont or the default ASCII ROM font is selected */
int softfontCharsetSelected = 0;


void loadMatrixSoftfont()
{
int i;

/*
** Strings to load a VT220 softfont providing the extra Matrix characters, select it and unselect it.
** This softfont contains 46 mirrored katakana as ASCII !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMN
** The real term is a Dynamically Replaceable Character Sets (DRCS) loaded into the terminal's
** memory using a Down-Line-Loading DRCS (DECDLD) control string. The font is built using Sixels.
** Font design by Philippe Majerus, January 2025
*/
const char* softfont[] = {
// DECDLD parameters
"\033P1;1;2{ M",
// Characters sixels:
/* ! */ "MQAyAAA\?/\?\?\?\?@A\?\?" ";",
/* " */ "\?ACwGOO\?/\?\?\?B\?\?\?\?" ";",
/* # */ "{CCECC[\?/\?@AAA\?\?\?" ";",
/* $ */ "\?CC{CC\?\?/AAABAAA\?" ";",
/* % */ "CC}ScCC\?/\?\?B\?\?@A\?" ";",
/* & */ "{CCC}CC\?/@AAA\?@A\?" ";",
/* ' */ "_gg}gg_\?/\?\?\?B\?\?\?\?" ";",
/* ( */ "{CCCCMO\?/\?@AAA\?\?\?" ";",
/* ) */ "CC{CCMO\?/\?\?\?@AA\?\?" ";",
/* * */ "{CCCCCC\?/BAAAAAA\?" ";",
/* + */ "C}CCC]C\?/\?\?@AAA\?\?" ";",
/* , */ "]_\?\?SSS\?/\?\?@AAAA\?" ";",
/* - */ "EIqaAAA\?/A@\?\?@AA\?" ";",
/* . */ "KSCCC}C\?/AAAAA@\?\?" ";",
/* / */ "Mo\?\?\?WE\?/\?\?@AAAA\?" ";",
/* 0 */ "{csSCMO\?/\?@AAAA\?\?" ";",
/* 1 */ "OQQ{SSO\?/\?\?\?@A\?\?\?" ";",
/* 2 */ "]_\?M\?\?M\?/\?\?@AAAA\?" ";",
/* 3 */ "GIIyIIG\?/\?\?\?@A\?\?\?" ";",
/* 4 */ "OOGG}\?\?\?/\?\?\?\?B\?\?\?" ";",
/* 5 */ "GGG}GGG\?/\?\?\?@AA\?\?" ";",
/* 6 */ "\?CCCCC\?\?/AAAAAAA\?" ";",
/* 7 */ "MQaQAAA\?/A@\?@AA\?\?" ";",
/* 8 */ "CkSecCC\?/@\?\?B\?@@\?" ";",
/* 9 */ "Mo\?\?\?\?\?\?/\?\?@@AAA\?" ";",
/* : */ "\?wC\?[_\?\?/B\?\?\?\?@A\?" ";",
/* ; */ "CCCGGG}\?/AAAAAA@\?" ";",
/* < */ "]aAAAAA\?/\?\?@AAA\?\?" ";",
/* = */ "\?_OGCGO\?/@\?\?\?\?\?\?\?" ";",
/* > */ "CsC}CsC\?/@\?\?BA\?@\?" ";",
/* ? */ "EIQaaQA\?/\?\?A@\?\?\?\?" ";",
/* @ */ "CSQIII\?\?/AAA@@@@\?" ";",
/* A */ "\?o\?EW_\?\?/B@@AABA\?" ";",
/* B */ "MO_OG\?\?\?/A@\?@AAA\?" ";",
/* C */ "OQQQ}QO\?/AAAA@\?\?\?" ";",
/* D */ "WgGG}GG\?/\?\?@\?B\?\?\?" ";",
/* E */ "\?\?{CCC\?\?/AABAAAA\?" ";",
/* F */ "}QQQQQQ\?/BAAAAAA\?" ";",
/* G */ "WiIIIIG\?/\?\?@AAA\?\?" ";",
/* H */ "}\?\?\?\?\?]\?/\?@AAAA\?\?" ";",
/* I */ "_\?}\?\?}\?\?/\?@B\?\?@A\?" ";",
/* J */ "O_\?\?\?\?}\?/\?\?@@AAB\?" ";",
/* K */ "}AAAAA}\?/BAAAAAB\?" ";",
/* L */ "]aAAAAM\?/\?\?@AAA\?\?" ";",
/* M */ "]iIIIII\?/\?\?@AAA\?\?" ";",
/* N */ "]_\?\?CCC\?/\?\?@AAAA\?" "\033\\"
// Other characters are not defined in this softfont
};

for (i=0;i<sizeof(softfont)/sizeof(softfont[0]);i++)
{
printf("%s", softfont[i]);
}
}

/* Signal handler to restore the cursor and reset scrolling region */
void restore_on_exit(signum)
int signum;
{
/* Ensure we don't leave the Matrix softfont selected */
printf(UNSELECT_SOFTFONT);
/* Show the cursor again */
printf("\033[?25h");
/* Reset scrolling region to the entire screen (1..24 or as needed) */
Expand Down Expand Up @@ -103,15 +171,23 @@ void update_trails()
{
// Normal ASCII character
c += '!';
if (softfontCharsetSelected)
{
printf(UNSELECT_SOFTFONT);
softfontCharsetSelected = 0;
}
putchar(c);
}
else
{
// Mirrored Katakana character
c = c - 94 + '!';
printf(SELECT_MATRIX_SOFTFONT);
if (!softfontCharsetSelected)
{
printf(SELECT_MATRIX_SOFTFONT);
softfontCharsetSelected = 1;
}
putchar(c);
printf(UNSELECT_SOFTFONT);
}

/* Increment the number of rows drawn */
Expand Down Expand Up @@ -147,7 +223,7 @@ int main()
printf("\033[1;24r");

/* Load Matrix softfont */
printf(LOAD_MATRIX_SOFTFONT);
loadMatrixSoftfont();

/* Clear screen */
printf("\033[2J");
Expand Down