Bug 29420

Created attachment 37639 [details]
Backtrace from the crash

A lot of GLSL errors:

ERROR: Could not create texture 'LinearDepth'
ERROR: Frame buffer 'LinearDepth' is not complete! Incomplete draw buffer!
ERROR: Failed to compile GLSL shader '/home/sa/Downloads/RendererFeatTest/core/shaders/deferred_ssao_blur_frag.glsl'!
ERROR: Couldn't create program 'deferred_ssao_blur_frag.glsl'
ERROR: Failed to compile GLSL shader '/home/sa/Downloads/RendererFeatTest/core/shaders/deferred_ssao_blur_frag.glsl'!
ERROR: Couldn't create program 'deferred_ssao_blur_frag.glsl'
ERROR: Could not create texture 'EdgeSmoothLinearDepth'
ERROR: Frame buffer 'EdgeSmoothLinearDepth' is not complete! Incomplete draw buffer!
ERROR: Failed to compile GLSL shader '/home/sa/Downloads/RendererFeatTest/core/shaders/posteffect_bloom_blur_frag.glsl'!
ERROR: Couldn't create program 'posteffect_bloom_blur_frag.glsl'
ERROR: Failed to compile GLSL shader '/home/sa/Downloads/RendererFeatTest/core/shaders/posteffect_bloom_blur_frag.glsl'!
ERROR: Couldn't create program 'posteffect_bloom_blur_frag.glsl'
ERROR: Failed to compile GLSL shader '/home/sa/Downloads/RendererFeatTest/core/shaders/posteffect_radial_blur_frag.glsl'!
ERROR: Couldn't create program 'posteffect_radial_blur_frag.glsl'

According to the game devs, the segfault is because of the shader failure.

The GLSL errors are gone now, it's still not rendering correctly though, probably because of these remaining errors:

ERROR: Could not create texture 'LinearDepth'
ERROR: Frame buffer 'LinearDepth' is not complete! Incomplete draw buffer!
ERROR: Could not create texture 'EdgeSmoothLinearDepth'
ERROR: Frame buffer 'EdgeSmoothLinearDepth' is not complete! Incomplete draw buffer!

There's a proper demo of the game out now:
http://www.AmnesiaGame.com/#main

The rendertest app has been removed, but it might still be useful to figure out what's wrong, so I have mirrored it here (let's hope the devs won't mind):
http://www.filefactory.com/file/b3330a9/n/RendererFeatTest-Linux32.zip

The most obvious problem in the demo is that everything seems to be upside down.

FWIW, the errors from rendertest and the demo being upside down is the same with both r300g and softpipe and with i965 on classic Mesa.

*** Bug 32045 has been marked as a duplicate of this bug. ***

Here is some updated info On what me and Hicham (of bug # 32045) have found.

What's happening now with the demo and release game is quite odd.  On Hicham's r300 based card his scenes are upside down, where as decals are rightside up.

(Hicham's screenshots)
http://img21.imageshack.us/i/amnesiascreenshot000.jpg/
http://img168.imageshack.us/i/amnesiascreenshot002.jpg/

Now from my (as the linux/mac developer for Frictionalgames) experience on testing under F14 on an ATI HD 3000 (embedded card) is that some of the GLSL refused to compile, where as Hicham did not have this issue. Because of that I could not get anywhere to the point of recreating his "upside down scenes".

What is interesting though is that I installed an nvidia GTS 450 card later that day and first ran it in pure mesa mode (albeit all software as nuvoue doesn't support that card yet).  And all of the GLSL compiled perfectly AND everything rendered perfectly.  Now it was at a snails pace at around 500ms to 1900ms per frame but it rendered:).

Interesting. With a recent snapshot (git master from today) I get the same problem (scenes upside down, decals okay) with r300g, softpipe, and llvmpipe.

If swrast is used (which is different from softpipe) the game does render fine. Which confirms what you described. 

I guess this is a bug in Gallium3D, but it's curious that Intel (which isn't using Gallium) have (or at least had, I haven't rechecked since filing the bug) a very similar problem.  

The HD 3000 seems to be an r600 card, and that driver is TTBOMK not as complete as r300g, which could be why it failed to run. You should be able to get software rendering working with either softpipe or llvmpipe, see http://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/drivers/llvmpipe/README 

Also, I just wanted to say that it's much appreciated to see one of the game devs taking an interest in getting Amnesia running on free drivers! :-)

I know why all Gallium drivers fail. I am working on the fix.

with software rasterizer the test renders ok, except for ssao

Please test mesa/master, most tests should render ok now.

(In reply to comment #12)
> Please test mesa/master, most tests should render ok now.

The game renders the right way up now, awesome work as always! :)

(In reply to comment #12)
> Please test mesa/master, most tests should render ok now.

The game works like a charm now, thanks a lot Marek

One more question : are these commits candidate for 7.9 ?

(In reply to comment #14)
> (In reply to comment #12)
> > Please test mesa/master, most tests should render ok now.
> 
> The game works like a charm now, thanks a lot Marek
> 
> One more question : are these commits candidate for 7.9 ?

The commit that fixed the misrendering is d531f9c2f5c78468d913fc509b223760ac1c1124 and yes, it'll be committed to 7.9 too.

If you don't mind, I'll close this bug. There are still some tests in RendererFeatTest32, which fail, like SSAO, but I have currently no idea how to fix them. Feel free to file separate bugs for each of them.

(In reply to comment #15)
> (In reply to comment #14)
> > (In reply to comment #12)
> > > Please test mesa/master, most tests should render ok now.
> > 
> > The game works like a charm now, thanks a lot Marek
> > 
> > One more question : are these commits candidate for 7.9 ?
> 
> The commit that fixed the misrendering is
> d531f9c2f5c78468d913fc509b223760ac1c1124 and yes, it'll be committed to 7.9
> too.
> 
> If you don't mind, I'll close this bug. There are still some tests in
> RendererFeatTest32, which fail, like SSAO, but I have currently no idea how to
> fix them. Feel free to file separate bugs for each of them.

Thanks, feel free to close this bug.