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intel/gen6: Some framebuffers having separate depthstencil should be unsupported

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When the framebuffer has separate depth and stencil buffers, and HiZ is
not enabled on the depth buffer, mark the framebuffer as unsupported. This
happens when trying to create a framebuffer with Z16/S8 because we haven't
enabled HiZ on Z16 yet.

Fixes gles2conform test stencil8.

Note: This is a candiate for the 8.0 branch.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=44948
Reviewed-and-tested-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed--by: Eric Anholt <eric@anholt.net>
Signed-off-by: Chad Versace <chad.versace@linux.intel.com>
This commit is contained in:
Chad Versace 2012-01-19 13:08:48 -08:00
parent f74d8aacbf
commit ba5252e590
1 changed files with 9 additions and 0 deletions
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9
src/mesa/drivers/dri/intel/intel_fbo.c
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@ -804,6 +804,15 @@ intel_validate_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
if (stencil_mt->format != MESA_FORMAT_S8)
fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
if (intel->gen < 7 && depth_mt->hiz_mt == NULL) {
/* Before Gen7, separate depth and stencil buffers can be used
* only if HiZ is enabled. From the Sandybridge PRM, Volume 2,
* Part 1, Bit 3DSTATE_DEPTH_BUFFER.SeparateStencilBufferEnable:
* [DevSNB]: This field must be set to the same value (enabled
* or disabled) as Hierarchical Depth Buffer Enable.
*/
fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED;
}
}
}