Dali Compressed file format - Revision history

>Lp: corrected typo

2017-01-20T09:44:30Z

corrected typo

← Older revision		Revision as of 05:44, 20 January 2017
Line 23:		Line 23:
	uint8 flag;		uint8 flag;
	uint16 i, index, offset;		uint16 i, index, offset;
	~~utin32~~ data;		uint32 data;
	flag = index = 0;		flag = index = 0;
	for (i=0; i<=156; i=i+4) {		for (i=0; i<=156; i=i+4) {

>Lp: tweak code

2017-01-20T02:57:24Z

tweak code

← Older revision		Revision as of 22:57, 19 January 2017
Line 20:		Line 20:
	uint8 bmap=malloc(32000); / st bitmap */		uint8 bmap=malloc(32000); / st bitmap */

	/* ~~Written~~ by Lonny Pursell - placed into the Public Domain 1/19/2017 */		/* PureC example by Lonny Pursell - placed into the Public Domain 1/19/2017 */
	~~/* note: all variables are unsigned */~~		uint8 flag;
			uint16 i, index, offset;
			utin32 data;
	flag = index = 0;		flag = index = 0;
	for (i=0; i<=156; i=i+4) {		for (i=0; i<=156; i=i+4) {

>Lp: tweak code

2017-01-20T02:36:07Z

tweak code

← Older revision		Revision as of 22:36, 19 January 2017
Line 21:		Line 21:

	/* Written by Lonny Pursell - placed into the Public Domain 1/19/2017 */		/* Written by Lonny Pursell - placed into the Public Domain 1/19/2017 */
			/* note: all variables are unsigned */
	flag = index = 0;		flag = index = 0;
	for (i=0; i<=156; i=i+4) {		for (i=0; i<=156; i=i+4) {

>Lp: tweak code

2017-01-19T20:25:12Z

tweak code

← Older revision		Revision as of 16:25, 19 January 2017
Line 17:		Line 17:
	uint8 *btab=malloc(size of byte array);		uint8 *btab=malloc(size of byte array);
	uint32 *ltab=malloc(size of long array);		uint32 *ltab=malloc(size of long array);

			uint8 bmap=malloc(32000); / st bitmap */

	/* Written by Lonny Pursell - placed into the Public Domain 1/19/2017 */		/* Written by Lonny Pursell - placed into the Public Domain 1/19/2017 */

>Lp: add decompression code

2017-01-19T18:51:02Z

add decompression code

← Older revision		Revision as of 14:51, 19 January 2017
Line 8:		Line 8:

	16 words palette		16 words palette
	? ~~table 1~~ size in bytes stored as plain ASCII text + cr/lf		? size of byte array in bytes, stored as plain ASCII text + cr/lf
	? ~~table 2~~ size in bytes stored as plain ASCII text + cr/lf		? size of long array in bytes, stored as plain ASCII text + cr/lf
	? array of bytes ~~'table 1 size'~~		? array of bytes
	? array of longs ~~'table 2 size'~~		? array of longs

	~~No description~~ of the ~~compression method exists at this time.~~		? image data:
			Assuming the tables have been loaded into arrays:
			uint8 *btab=malloc(size of byte array);
			uint32 *ltab=malloc(size of long array);

			/* Written by Lonny Pursell - placed into the Public Domain 1/19/2017 */
			flag = index = 0;
			for (i=0; i<=156; i=i+4) {
			for (offset=0; offset<=31840; offset=offset+160) {
			if (flag==0) {
			flag = btab[index];
			data = ltab[index];
			index++;
			}
			bmap[offset + i] = (data >> 24) & 0xFF;
			bmap[offset + i + 1] = (data >> 16) & 0xFF;
			bmap[offset + i + 2] = (data >> 8) & 0xFF;
			bmap[offset + i + 3] = data & 0xFF;
			flag--;
			}
			}
	</pre>		</pre>
	Back to [[ST Picture Formats]]		Back to [[ST Picture Formats]]

>Lp: New page

2017-01-17T00:55:03Z

New page

New page

<pre>
Dali compressed *.LPK (ST low resolution)
*.MPK (ST medium resolution)
*.HPK (ST high resolution)

Files do not seem to have any resolution or bit plane info stored in them. The file
extension seems to be the only way to determine the contents.

16 words palette
? table 1 size in bytes stored as plain ASCII text + cr/lf
? table 2 size in bytes stored as plain ASCII text + cr/lf
? array of bytes 'table 1 size'
? array of longs 'table 2 size'

No description of the compression method exists at this time.
</pre>
Back to [[ST Picture Formats]]