8bpp images

[saboteur]

Anyone got a working example or a working rapinit.s using 8bpp images ?

 

I have no problem using 4bpp but as soon as i create one in paint and save it as 8bpp I get a load of crap on the screen.

 

I've tried changing the rapinit.s by hand and using OMF's excellent tool, but still cant get it working.

 

Any help appreciated.

 

Cheers

[tonma]

Can you send an image to test ?

 

; sprite 0 - decors GFX  ************
	dc.l	1								; (REPEAT COUNTER) 				; Create this many objects of this type (or 1 for a single object)
	dc.l	is_active						; sprite_active					; sprite active flag
	dc.w	48,0								; sprite_x						; 16.16 x value to position at
	dc.w	16,0								; sprite_y						; 16.16 y value to position at
	dc.w	0,0								; sprite_xadd					; 16.16 x addition for sprite movement
	dc.w	0,0								; sprite_yadd					; 16.16 y addition for sprite movement
	dc.l	256								; sprite_width					; width of sprite (in pixels)
	dc.l	192								; sprite_height					; height of sprite (in pixels)
	dc.l	is_normal						; sprite_flip					; flag for mirroring data left<>right
	dc.l	0								; sprite_coffx					; x offset from center for collision box center
	dc.l	0								; sprite_coffy					; y offset from center for collision box center	
	dc.l	0 ;32/2							; sprite_hbox					; width of collision box
	dc.l	0 ;5/2								; sprite_vbox					; height of collision box
	dc.l	decorsGFX						; sprite_gfxbase				; start of bitmap data
	dc.l	8								; (BIT DEPTH)					; bitmap depth (1/2/4/8/16/24)
	dc.l	is_RGB							; (CRY/RGB)						; bitmap GFX type
	dc.l	is_opaque						; (TRANSPARENCY)				; bitmap TRANS flag
	dc.l	256*192							; sprite_framesz				; size per frame in bytes of sprite data
	dc.l	256								; sprite_bytewid				; width in bytes of one line of sprite data
	dc.l	0								; sprite_animspd				; frame delay between animation changes
	dc.l	0								; sprite_maxframe				; number of frames in animation chain
	dc.l	ani_rept						; sprite_animloop				; repeat or play once
	dc.l	edge_wrap						; sprite_wrap					; wrap on screen exit, or remove
	dc.l	spr_inf							; sprite_timer					; frames sprite is active for (or spr_inf)
	dc.l	spr_linear						; sprite_track					; use 16.16 xadd/yadd or point to 16.16 x/y table
	dc.l	0								; sprite_tracktop				; pointer to loop point in track table (if used)
	dc.l	spr_unscale						; sprite_scaled					; flag for scaleable object
	dc.l	%00100000						; sprite_scale_x				; x scale factor (if scaled)
	dc.l	%00100000						; sprite_scale_y				; y scale factor (if scaled)
	dc.l	-1								; sprite_was_hit				; initially flagged as not hit
	dc.l	0								; sprite_CLUT					; no_CLUT (8/16/24 bit) or CLUT (1/2/4 bit)
	dc.l	can_hit							; sprite_colchk					; if sprite can collide with another
	dc.l	cd_keep							; sprite_remhit					; flag to remove (or keep) on collision
	dc.l	single							; sprite_bboxlink				; single for normal bounding box, else pointer to table
	dc.l	1								; sprite_hitpoint				; Hitpoints before death
	dc.l	2								; sprite_damage					; Hitpoints deducted from target
	dc.l	256								; sprite_gwidth					; GFX width (of data)


assets.txt :
abs,decorsGFX,gfx_clut,assets\GFX\decor\dec.bmp

in abs:
' chargement des palettes
loadclut(strptr(decorsGFX_clut),0,256) ' palette DecorS

 

[saboteur]

Thanks tonma, i'll have a looki when i get home later.

 

I have a feelling my loadclut statement is wrong.

[TXG/MNX]

On 12/2/2020 at 8:35 AM, tonma said:

Can you send an image to test ?

 

; sprite 0 - decors GFX  ************
	dc.l	1								; (REPEAT COUNTER) 				; Create this many objects of this type (or 1 for a single object)
	dc.l	is_active						; sprite_active					; sprite active flag
	dc.w	48,0								; sprite_x						; 16.16 x value to position at
	dc.w	16,0								; sprite_y						; 16.16 y value to position at
	dc.w	0,0								; sprite_xadd					; 16.16 x addition for sprite movement
	dc.w	0,0								; sprite_yadd					; 16.16 y addition for sprite movement
	dc.l	256								; sprite_width					; width of sprite (in pixels)
	dc.l	192								; sprite_height					; height of sprite (in pixels)
	dc.l	is_normal						; sprite_flip					; flag for mirroring data left<>right
	dc.l	0								; sprite_coffx					; x offset from center for collision box center
	dc.l	0								; sprite_coffy					; y offset from center for collision box center	
	dc.l	0 ;32/2							; sprite_hbox					; width of collision box
	dc.l	0 ;5/2								; sprite_vbox					; height of collision box
	dc.l	decorsGFX						; sprite_gfxbase				; start of bitmap data
	dc.l	8								; (BIT DEPTH)					; bitmap depth (1/2/4/8/16/24)
	dc.l	is_RGB							; (CRY/RGB)						; bitmap GFX type
	dc.l	is_opaque						; (TRANSPARENCY)				; bitmap TRANS flag
	dc.l	256*192							; sprite_framesz				; size per frame in bytes of sprite data
	dc.l	256								; sprite_bytewid				; width in bytes of one line of sprite data
	dc.l	0								; sprite_animspd				; frame delay between animation changes
	dc.l	0								; sprite_maxframe				; number of frames in animation chain
	dc.l	ani_rept						; sprite_animloop				; repeat or play once
	dc.l	edge_wrap						; sprite_wrap					; wrap on screen exit, or remove
	dc.l	spr_inf							; sprite_timer					; frames sprite is active for (or spr_inf)
	dc.l	spr_linear						; sprite_track					; use 16.16 xadd/yadd or point to 16.16 x/y table
	dc.l	0								; sprite_tracktop				; pointer to loop point in track table (if used)
	dc.l	spr_unscale						; sprite_scaled					; flag for scaleable object
	dc.l	%00100000						; sprite_scale_x				; x scale factor (if scaled)
	dc.l	%00100000						; sprite_scale_y				; y scale factor (if scaled)
	dc.l	-1								; sprite_was_hit				; initially flagged as not hit
	dc.l	0								; sprite_CLUT					; no_CLUT (8/16/24 bit) or CLUT (1/2/4 bit)
	dc.l	can_hit							; sprite_colchk					; if sprite can collide with another
	dc.l	cd_keep							; sprite_remhit					; flag to remove (or keep) on collision
	dc.l	single							; sprite_bboxlink				; single for normal bounding box, else pointer to table
	dc.l	1								; sprite_hitpoint				; Hitpoints before death
	dc.l	2								; sprite_damage					; Hitpoints deducted from target
	dc.l	256								; sprite_gwidth					; GFX width (of data)


assets.txt :
abs,decorsGFX,gfx_clut,assets\GFX\decor\dec.bmp

in abs:
' chargement des palettes
loadclut(strptr(decorsGFX_clut),0,256) ' palette DecorS

 

Hi,

 

I was playing around with to images 8-bit 256 color bmp files. The first does display right when I disable the second object in the rapinit.s

When enable both pictures the first objects gets corrupt and doesnot look the same. It seems its using the clut table of the second picture.

 

Both pictures are 8-bit bmp

 

loadclut(strptr(sprite_background_clut),0,256)
loadclut(strptr(sprite_girlb_clut),0,256)

 

How can I handle two or more 8-bit bmp files with cluts ?

 

picture 1: Jaguar is 256 color bmp

picture 2: Jaguar + clut enabled + second sprite girlb 256 color no clut in code jaguar ok, girlb sprite not ok

picture 3: Jaguar no clut in code and girlb clut enabled in code girlb displays ok, jaguar don't

 

Could someone show me an example code of two 256 color bmp files shown on screen ?

[matmook]

There is only one 256 color clut in the Jaguar.

You can use multiple 8bit sprites but they will all share the same clut.

 

The last loadclut overwrites previous loaded clut.

[TXG/MNX]

On 12/6/2020 at 3:51 PM, matmook said:

There is only one 256 color clut in the Jaguar.

You can use multiple 8bit sprites but they will all share the same clut.

 

The last loadclut overwrites previous loaded clut.

yep fixed it not using 256 color images right now

[JumbleJag]

I know this is old but when I read matmook comment yesterday I understood how the clut works,Thank U

Edited August 13, 2021 by JumbleJag