[Bug 33762] New: Framebuffer Depth textures (Shadow mapping) - FBO-EXT

[Bug 33762] New: Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

           Summary: Framebuffer Depth textures (Shadow mapping) - FBO-EXT
           Product: Mesa
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/R600
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: s3734770@mail.zih.tu-dresden.de


I'm running a depth map demo that uses fbo depth maps as a render target. The
fbo (EXT) is filled with static stuff (like a mask that is moved over the
screen). So the contents i drawed into the buffer (the depth component is bound
to the buffer) are ignored

I don't know if this feature is in progress or if you know what is missing in
the driver.
If you have no clue, I can offer the following things after a request:
 - Pics of the artifacts
 - Videos that show that the depth texture is not updated
 - Explanation how i set up the FBO/Renderbuffer

The thing works with fglrx.

Extensions I used:
Framebuffer_EXT
Renderbuffer_EXT (for depth store)

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

--- Comment #1 from s3734770@mail.zih.tu-dresden.de 2011-01-31 07:40:14 PST ---
Here the code:

  glGenFramebuffersEXT(1, @fb);
  glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
  glGenRenderbuffersEXT(1, @render_buf);
  glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, render_buf);
  glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, ShadowSize,
ShadowSize);
  glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, render_buf);

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

--- Comment #2 from Alex Deucher <agd5f@yahoo.com> 2011-01-31 07:47:56 PST ---
You'll probably have more luck with the r600 gallium driver (r600g).

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

--- Comment #3 from s3734770@mail.zih.tu-dresden.de 2011-01-31 08:38:58 PST ---
Oh I forgot: Driver is of course r600g.

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

s3734770@mail.zih.tu-dresden.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Drivers/DRI/R600            |Drivers/Gallium/r600

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

--- Comment #4 from s3734770@mail.zih.tu-dresden.de 2011-01-31 09:41:12 PST ---
i found a demo that reproduces the bug for me:

http://cgit.freedesktop.org/mesa/demos/
in /demos/shadowtex

in all programs the texture looks the same. i attached a pic how the demo looks
like. watch the shadow

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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--- Comment #5 from s3734770@mail.zih.tu-dresden.de 2011-01-31 09:42:17 PST ---
Created an attachment (id=42761)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=42761)
shadow map

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

--- Comment #6 from s3734770@mail.zih.tu-dresden.de 2011-01-31 12:04:55 PST ---
The following hint is given in the docs:

6.3 CB
6.3.1 DB->CB Copies: RV6xx
In RV610, RV630, RV620, and RV635 but not R600, RV670, or RS780, the DB->CB
copies needs the following
programming sequence to ensure the DB will read the Z/Stencil data.
1. Z_ENABLE = true
2. STENCIL_ENABLE = true
3. Z_WRITE_ENABLE = false
4. STENCILWRITEMASK = 0xff
5. Z vertices = 0.0. (like a Z clear to 0.0)
6. ZFUNC= LEQUAL
7. STENCILFUNC = REF_ALWAYS
8. STENCILZPASS = STENCIL_KEEP
9. STENCILZFAIL = STENCIL_INCR_CLAMP
10. DB_RENDER_OVERRIDE.FORCE_HIZ_ENABLE = FORCE_DISABLE

It seems to be a RV6xx specific problem. I hope, you can fix it.

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

--- Comment #7 from Henri Verbeet <hverbeet@gmail.com> 2011-01-31 16:25:18 PST ---
Probably fixed by d171ae086bae37279251a1d6f32e16e333cfc154, shadowtex is at
least.

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

--- Comment #8 from s3734770@mail.zih.tu-dresden.de 2011-01-31 23:45:44 PST ---
the latest changes (between 11bc8991e94e2fa6d461193a6aff47f8f94b7a47 and
5e19b5ad16b2761fe9d8877318f2fc97b229335c) broke the driver.
I can use 2D menus with OGL and glxgears works but when I start using the 3D
part (uses FBO, shaders and vertex buffers), the image freezes and I cannot
stop my prog.

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

--- Comment #9 from Dave Airlie <airlied@freedesktop.org> 2011-02-01 00:05:36 PST ---
does reverting 

11bc8991e94e2fa6d461193a6aff47f8f94b7a47

 fix it?

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

--- Comment #10 from s3734770@mail.zih.tu-dresden.de 2011-02-01 00:15:31 PST ---
Git bisect blamed 14880a510a1a288df0778395097d5a52806abfb0, 
there are strange things happening.
The framerate drops downto 3 FPS and the texture bug appears again.

I also created a patch inspired from glisse that fixes the bug (but is maybe
not the correct solution because the tiling management is still unfinished)

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

--- Comment #11 from s3734770@mail.zih.tu-dresden.de 2011-02-01 00:16:03 PST ---
(In reply to comment #9)
> does reverting 
> 
> 11bc8991e94e2fa6d461193a6aff47f8f94b7a47
> 
>  fix it?

no

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

--- Comment #12 from s3734770@mail.zih.tu-dresden.de 2011-02-01 00:19:08 PST ---
Created an attachment (id=42797)
 View: https://bugs.freedesktop.org/attachment.cgi?id=42797
 Review: https://bugs.freedesktop.org/review?bug=33762&attachment=42797

Patch that fixes the depth map copying (but not the freeze)

This patch is inspired by Jerome Glisse
This patch does not solve the problem that the screen is freezing

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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https://bugs.freedesktop.org/show_bug.cgi?id=33762

--- Comment #13 from s3734770@mail.zih.tu-dresden.de 2011-02-01 00:23:53 PST ---
When I revert 14880a510a1a288df0778395097d5a52806abfb0, i can play with working
depth textures and 3 FPS.

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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--- Comment #14 from s3734770@mail.zih.tu-dresden.de 2011-02-01 00:26:09 PST ---
Ah,
as I see the original problem is fixed in git but the glsl compiler had a
deadlock so that I cannot test it.

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[Bug 33762] Framebuffer Depth textures (Shadow mapping) - FBO-EXT

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s3734770@mail.zih.tu-dresden.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #15 from s3734770@mail.zih.tu-dresden.de 2011-04-07 01:20:28 PDT ---
resolved long time ago

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