Lock() Texture bug due to video card limitation to 256*256 ?

hybrid · Post by **hybrid** » Tue Feb 12, 2008 4:59 pm

How does your code look like now?

3dsolar · Post by **3dsolar** » Fri Feb 15, 2008 8:41 am

We believe its linked to DirectX level we assume Irrlicht use level 0 in DurectX so we try now on OpenGL but we have another problem our function drawAll() do not work anymore under OpenGL init well but do not render maybe a problem of thread.

hybrid · Post by **hybrid** » Fri Feb 15, 2008 9:11 am

Well, show us the code. As much as possible.

3dsolar · Post by **3dsolar** » Fri Feb 15, 2008 10:14 am

can we send it to you privately first ? and then post solution to the forum ?
can we exchange by ICQ and email ?

Halifax · Post by **Halifax** » Sat Feb 16, 2008 5:06 am

<offtopic>
Well not truly offtopic, but anyways. The lock() "problem" shouldn't effect the program if you are using OpenGL since you don't really have to lock() a texture, and it just returns a pointer to the texture.

3dsolar · Post by **3dsolar** » Mon Feb 18, 2008 11:07 am

Why in irrlicht 1.3-1.4 function lock() use only 0 level (first parametr in LockRect in DirectX mode) this could be the reason why we cant lock a texture of 512*512 with some wideo cards.

//! lock function
void* CD3D9Texture::lock()
{
if (!Texture)
return 0;

HRESULT hr;
D3DLOCKED_RECT rect;
if(!IsRenderTarget)
{
hr = Texture->LockRect(0, &rect, 0, 0);
}
else
{
D3DSURFACE_DESC desc;
Texture->GetLevelDesc(0, &desc);

...
...
...

}

if (FAILED(hr))
{
os:rinter::log("Could not lock DIRECT3D9 Texture.", ELL_ERROR);
return 0;
}

return rect.pBits;
}

hybrid · Post by **hybrid** » Mon Feb 18, 2008 1:52 pm

Because the main texture is to be read and/or changed? I think that level 0 is the texture from which the mipmaps are generated (and stored in higher levels). But in this case the high detail texture is locked and accessed. This behavior has been this way for a very long time and seems to be reasonable.

3dsolar · Post by **3dsolar** » Mon Feb 18, 2008 5:12 pm

Yes read and changed we send a video feed to irrlicht to add 3d object to it and read it back.

hybrid · Post by **hybrid** » Mon Feb 18, 2008 8:14 pm

Yes, but the thing is that this call should be correct for this purpose.
How do you create the texture?

sio2 · Post by **sio2** » Tue Feb 19, 2008 12:27 am

Compile a debug version of your app. Follow the instructions in the DXSDK docs for enabling D3D Debug, go to DX control panel and enable D3D debug libs, crank the debug level up to max-1 and look at the debug output.