Re: Re: Tips for debugging D3D Textures & DirectSound? (Resend)

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Just to have this on the list.
 
> It's probably more likely that the game is trying
> to use non-power of two textures here.

In some cases, the textures are indeed not power of two, some are multiples of 
powers of two (eg. 64x96, is this alright for OpenGL). All textures that 
successfully load ARE powers of two (64,128,256,512). All texture loading 
appears to go through the same code-path.

Observed image sizes of failing textures.
800x600
300x31
1024x768
64x96

If this is the case, how do we go about fixing this? I'm guessing this will 
have been encountered before? Can we apply a fix used then or is this an 
unresolved issue?

I beleive nVidia's OpenGL may have a proprietary extension for non-power of 
two textures, what about other cards? Can we use this where it is available? 
And what can we do where it isn't?

It might be possible (although CPU consuming) to resize the textures on the 
fly or pad the extra space out with alpha, but will one of these two 
solutions not cause rendering issues? Will we have to alter the texture 
alignment when they're rendered back down (in which case, the above solution 
starts to reek of hack).

- From a trace, +ddraw,+tid.

0002:trace:ddraw:D3D_GL_update_texture_stage_states
0002:trace:ddraw:D3D_GL_update_texture_stage_states stage 0, state 0 
(TEXTUREMAP), value 0x553be948
0002:trace:ddraw:GL_PixelFormat_To_TextureFormat surface format 00000040, 32
0002:trace:ddraw:GL_PixelFormat_To_TextureFormat masks: 00ff0000, 0000ff00, 
000000ff, 00000000
0002:trace:ddraw:GL_PrepTexture ID 2, fmt 80E1, ifmt 1907, type 1401
0002:trace:ddraw:GL_PrepTexture GL_Prep_Texture:610: glGetError returns 
00000000
0002:trace:ddraw:GL_load_texture_target GL_load_texture_target:424: glGetError 
returns 00000000
0002:trace:ddraw:GL_load_texture_target loading target 0de1, level 0, 800x600, 
ptr 0x5a1b0020
0002:err:ddraw:GL_load_texture_target glGetError returns 00000501 for 
D3D_GL_load_texture


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