igowin graphical glitches

[Carlos Lozano]

Hello,

> I'm trying to locate the source of some graphical glitches in Igowin, a nice 
> 9x9 Go program (download: http://www.smart-games.com/igo.html, screenshot 
> with glitches attached,) but since someone here might know directly what the 
> problem is, I'd better ask here first.. (to be honest, I already tried to 
> find out and miserably failed :-))
> 
> Problem 1: Go stones should be round, not square. The program uses the 
> following functions to draw a stone:
> 
> trace:bitblt:BitBlt hdcSrc=0x840 0,0 24 bpp->hdcDest=0x834 76,83 37x37x24 
> rop=8800c6
> trace:bitblt:BitBlt hdcSrc=0x844 0,0 24 bpp->hdcDest=0x834 76,83 37x37x24 
> rop=ee0086
> 
> So, first it wants to create a black hole in the board (0x8800c6 = SCRAND,) 
> using a mask at 0x840 and then fit a stone at 0x844 in the hole (0xee0086 = 
> SRCPAINT (OR)). I disabled the second operation, but this gave me a round 
> hole, not a square one.. forcing a SRCCOPY on the first one also gives a 
> square hole, so maybe something goes wrong with creating the mask image.. but 
> as I'm not really sure about this, does anyone here have an idea where the 
> problem might be?

Good, i don't think that the problem will be in the blit, i have
"rewritten" SRCPAINT and SRCAND using GetPixel and SetPixel, it has yet
the same problem.

> 
> Problem 2: Shadows shouldn't have funky colors. As far as I can see, one 
> SRCPAINT is used for drawing a shadow: 
> 
> trace:bitblt:BitBlt hdcSrc=0x83c 83,90 24 bpp->hdcDest=0x834 83,90 30x30x24 
> rop=ee0086

If you are interested in some really "funky", run the game with:
wine --debugmsg +all igowin.exe &> log

and you will see the shadows ;) (yes with a incorrect color)

Regards,
Carlos.

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