[Piglit] [PATCH] hiz, new depth test

Chad Versace chad.versace at linux.intel.com
Thu Nov 8 12:52:38 PST 2012

On 11/05/2012 12:09 PM, Chad Versace wrote:
> On 11/05/2012 12:04 PM, Chad Versace wrote:
>> On 10/31/2012 06:38 AM, Tapani Pälli wrote:
>>> Hello,
>>> Here is a new test that tries to demonstrate failure with hiz code when
>>> frambuffer depth and color do not match. This failure happens for example
>>> with MESA_FORMAT_RGB565 color buffer and MESA_FORMAT_X8_Z24 depth buffer.
>>> This test seems to fail, however my suggested fix does not make it pass
>>> either so I am a bit puzzled if I am testing here the right thing. My
>>> suggested fix was to not use fast depth clear in this case which produces
>>> good visual results with test applications, however this piglit test does
>>> not pass.
>>> Any help appreciated;
>> I suspect that the test failure may be unrelated to hiz. The failing probes are
>> *color* probes. I've ran the test in non-auto mode, and, at least visually,
>> the color at the failing probe points are correct.
>> Maybe Piglit or Mesa is handling RGB565 incorrectly? I'm still looking into it.
> I found it. Adding `piglit_set_tolerance_for_bits(5, 6, 5, 0)` to the top of
> piglit_display() fixes the test.
> On what gen do you expect the test to fail? It passes for me on Sandybridge.


Do you have commit access to Piglit? I can commit this test for you, with the
tolerance fix, if you don't.

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