pattern ver 01

[koilazka]

pattern ver 01 - Converts 24bit bitmaps into snasm68k assembly or binary data.

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koilazka - pattern ver 01

option: 0: pattern data format    
      : 1:     bbb data format    8 colour compression: 0-7
      : 2: pattern data format    bin output
      : 3:     bbb data format    bin output

option: 0
bitmap: sprite.bmp

You'll need a 1x16 pal.bmp pallet bitmap in the same directory.
The program uses this to decode the colours.

The sprite/pattern bitmap attribute should be a multiple of 8: 8x8, 8x32, 128x64, etcetra.
The program will dump pattern data into txt or bin files.
Cell/Pattern order from left to right, then jump down repeat.
The program will converts 24bit colours into Mega Drive 9bit colours for the pal.txt file.

Bitmap size limit about 250x250.. c++ runtime stack size limit.
No error checkers, doing some wrong will just crash the program.
example: Typo when declaring the sritep.bmp
example: Not having a pal.bmp
example: Attribute that wont divide by 4 (This will dump pad bytes)

zip includes bbb_decom.txt, the bbb pattern decompressor, snasm assembly code:

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;// koilazka - bbb pattern line decompressor
;// VRAM write bbb pattern example
;// pattern_bbb, pallet_A

sendspace.com - patten ver 01: pattern.zip
> pattern.exe
> pal.bmp
> sprite.bmp
> bbb_decom.txt
> read.txt


Tested on winxp & 7. Ask if you want me to add some compression format.

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;////////////////////////////////////////////////////////////////////////
;// VRAM write bbb pattern example

		move.l	#$40000000,($c00004)	;// VRAM write $0000

		moveq	#0,d0			;// zero
		move.b	#7,d0			;// repeator: 1 pattern (8-1)
pattern_clear:
		move.l	#0,($c00000)		;// zero 32bit
		dbf	d0,pattern_clear	;// repeat


		lea	pattern_bbb,a0		;// set a0 to pattern_bbb
		moveq	#0,d5			;// zero
		move.b	#$1f,d5			;// repeator: 4 patterns ((8*4)-1)
pattern_fill:
		bsr	bbb_decom		;// decompress pattern_bbb line to d4
		move.l	d4,($c00000)		;// write pattern line to vdata
		dbf	d5,pattern_fill		;// repeat

;////////////////////////////////////////////////////////////////////////

[TmEE co.(TM)]

it is more efficient to have just binary data, so you INCBIN or BINCLUDE it...

[koilazka]

Like.. Just pure acsii binary bytes in a file?.. I can add that if so.

Im not sure how to link binary files with snasm.

[Shiru]

Binary is binary, it just a bytes of data, and has nothing to do with ASCII or other text encoding standart.

[koilazka]

Your right.. Im not sure why i call it acsii binary, i probably wont from now on :/
INCBIN <filename> worked with snasm, ill add the option to the next version.

// Edit
New version with bin output.
Ill have to rewrite it next time, program code is a bit linear, not good for adding new code.

// Edit
Files been uploaded to sendspace.