Sprites not transparent on some systems

dige · Post by **dige** » Sat Nov 18, 2006 10:21 pm

Could someone test please this litte calendar:

http://www.dbsthumb.de/Download/Kalender.exe [128KB]

On some computers the Snowflaks are not drawed transparent.
What could be a reason?

dige · Post by **dige** » Sun Nov 19, 2006 11:25 am

Here are two screenshots ... I guess you'll see what I mean ;-)

Alpha OK

Alpha Failed

What can I do? I use this Bitmap-Image :

16 Colors ... ColorIndex 0 is RGB(0, 0, 0)

Comtois · Post by **Comtois** » Sun Nov 19, 2006 12:07 pm

work fine here with GEFORCE 6800

heinz.goldbach · Post by **heinz.goldbach** » Sun Nov 19, 2006 1:07 pm

work also fine here with NVIDIA RIVA TNT 2 Model 64 (original MS Driver XP Prof. SP 2

Fangbeast · Post by **Fangbeast** » Sun Nov 19, 2006 2:20 pm

Dige, another problem is that the mouse is captured within the program borders so I can't mouse the mouse anywhere else!!!

Deeem2031 · Post by **Deeem2031** » Sun Nov 19, 2006 10:20 pm

no problems with 32bit and 16bit (GForce FX 5200)

Bonne_den_kule · Post by **Bonne_den_kule** » Sun Nov 19, 2006 10:25 pm

No problems here, nVidia GeForce 7600 GS

Trond · Post by **Trond** » Sun Nov 19, 2006 10:54 pm

I've got the problems here. S3 ProSavage DDR.

Is the sprite 64x64 or 32x32 pixels?

mskuma · Post by **mskuma** » Mon Nov 20, 2006 12:13 am

No problem here - integrated Intel graphics, i.e. 82945G Express (I think otherwise known as Intel Graphics Media Accelerator 950).

Psychophanta · Post by **Psychophanta** » Mon Nov 20, 2006 12:43 am

No problem here.
WinXP PRO SP2 spanish with a bad VGA (a SIS M760GX)

J. Baker · Post by **J. Baker** » Mon Nov 20, 2006 4:08 am

Works fine with my ATI 9600 Pro but I did have an ATI 9100 at one time that didn't display some things that had transparency correctly. I believe it was an error with the 9100 card itself though.

netmaestro · Post by **netmaestro** » Mon Nov 20, 2006 7:23 am

How are you displaying it? DisplayTransparentSprite, DisplayAlphaSprite, DisplayTranslucentSprite, DisplaySprite3D, which? Could we see some code?

dige · Post by **dige** » Mon Nov 20, 2006 9:31 am

Thanks everybody for testing. And nice to read that is works fine.

Trond wrote:I've got the problems here. S3 ProSavage DDR.

Is the sprite 64x64 or 32x32 pixels?

Trond, know I know 2 users with problems, but both have a S3 graficsystem.
So, it might be only a S3 problem?

Could it be a problem of a 4-Bit Bitmap? I've created another
Demo with an 8Bit SnowFlake ... could you please test this too?

http://www.dbsthumb.de/Download/Kalender_8Bit.exe [135KB]

I use a 32x32 4Bit ( 16 Colors ) Bitmapfile und DisplaySprite3D() to
display the Sprites, because I need Zoom, Rotation and Alpha.

Guess only DisplaySprite3D() is able to do that job?

Here is the Display Part :

Code: Select all

Procedure   CAL_FX_Snow()
  
  If SLS_SnowCount And Start3D()
    For n = 0 To SLS_SnowCount
      With Snow(n)
        DisplaySprite3D( \SpriteID, \x, \y, \Alpha)
        \y + \Speed
        If \y > ScreenSizeY
          CAL_GetRandomSettings( @Snow(n) )
        EndIf  
      EndWith
    Next
    Stop3D()
  EndIf
EndProcedure

netmaestro · Post by **netmaestro** » Mon Nov 20, 2006 9:40 am

Your code looks good, I just wonder if a 4bit color graphic is appropriate for DisplaySprite3D, as the docs suggest a 32bit screen for using it. Is it possible to modify the snowflake in a graphics editor and try with a 32bit snowflake? It might solve it, not sure. Worth a try though, imho.

Trond · Post by **Trond** » Mon Nov 20, 2006 2:53 pm

I've got the same problem with the new program. And the Sprite3D example. But not with Blitz programs.