WineD3D / D3D8 color format issues - wine-devel

21 Feb 2006


      Hi,
Today I tested Max Payne which uses D3D8. Before I started the D3D8 -> WineD3D 
transistion the game worked fine. Right now it doesn't work correct anymore 
when you let the game use 16bit textures in its setup menu. Right now all 
textures are missing. The problem appears to be a glTexImage2D call in 
wined3d's LoadTexture (surface.c) which results in a 'invalid operation'. 
Similar code worked fine before the d3d8 transition.
After analysing the functions it appears that in 16bit the game wants to use 
D3DFORMAT_R5G6B5. In case of d3d8 this is translated into GL_RGB while in 
case of wined3d GL_BGR is used. (Oliver changed it at some stage, he changed 
other formats too claiming those were incorrect but no more explanation than 
that)
I'm using the latest nvidia drivers and the GL_EXT_BGRA extension is present 
so in theory GL_BGR should work but for some reason. (Perhaps it is a driver 
bug as I found similar issues on google regarding both the drivers from ati 
and nvidia. I wasn't able to find a solution) If I change GL_BGR into GL_RGB 
I don't get an invalid operation and the game works fine (the textures look 
well too).
According to MSDN the format is just the internal format. Someone in 
#winehackers told me that Windows prefers BGR because it is more efficient. 
The format is for internal use and second the opengl driver does the 
conversion for us anyway.
http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/directx9_c/...
What shall I do, just change the behaviour back to GL_RGB which works? Second 
the issue likely appears for some other formats which Oliver changed.
Regards,
Roderick