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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #6 from s3734770 at 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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