[Mesa-dev] spec/!OpenGL 3.0/gl-3.0-texture-integer fails on r600g

[Martin Andersson]

Well, I should have been more clear. If I do this:

263: value[3] = 0;
290: expected[3] = 1.0;

The test always passes, but if I only do this:

290: expected[3] = 1.0;

The test fails with this error:

texture-integer: failure with format GL_RGB8I_EXT:
  texture color = 92, 126, 14, 104
  expected color = 0.25, 0.5, 0.75, 1
  result color = 0.25098, 0.501961, 0.74902, 0
PIGLIT: {'result': 'fail' }

//Martin

On Sat, Aug 3, 2013 at 5:23 AM, Marek Olšák <maraeo at gmail.com> wrote:
> FragShaderText contains the shader code. Anyway, we have found the
> issue: expected[3] should really be set to 1.0, because RGB formats
> must return (r,g,b,1). It's a bug in the piglit test.
>
> Marek
>
> On Fri, Aug 2, 2013 at 11:44 PM, Martin Andersson <g02maran at gmail.com> wrote:
>> On Fri, Aug 2, 2013 at 2:52 PM, Marek Olšák <maraeo at gmail.com> wrote:
>>> The format doesn't have alpha. See what the texture fetch writes to
>>> the alpha channel.
>>
>> I looked at the code but I can't figure out where the texture fetch
>> happens, could you point me in the right direction?
>>
>>>
>>> You may try setting "texture-integer.c:290" to "expected[3] = 1.0;"
>>
>> The test passes if I do that.
>>
>> //Martin
>>
>>>
>>> Marek
>>>
>>> On Fri, Aug 2, 2013 at 2:15 PM, Martin Andersson <g02maran at gmail.com> wrote:
>>>> Hi,
>>>>
>>>> I started to look at why the spec/!OpenGL 3.0/gl-3.0-texture-integer
>>>> sometimes fails on my AMD 6950, using mesa master. It fails with
>>>> errors like this:
>>>>
>>>> texture-integer: failure with format GL_RGB8I_EXT:
>>>>   texture color = 100, 9, 71, 0
>>>>   expected color = 0.25, 0.5, 0.75, 0
>>>>   result color = 0.25098, 0.501961, 0.74902, 1
>>>> PIGLIT: {'result': 'fail' }
>>>>
>>>> When I ran the test a bunch of times I found that it only failed when
>>>> the last texture color was zero. So when I changed this code in the
>>>> pigilt test:
>>>>
>>>> value[0] = rand() % max;
>>>> value[1] = rand() % max;
>>>> value[2] = rand() % max;
>>>> value[3] = rand() % max;
>>>>
>>>> to this:
>>>>
>>>> value[0] = rand() % max;
>>>> value[1] = rand() % max;
>>>> value[2] = rand() % max;
>>>> value[3] = 0;
>>>>
>>>> The test always fails.
>>>>
>>>> I found this bug https://bugs.freedesktop.org/show_bug.cgi?id=63664
>>>> But I can't reproduce this bug on my intel G45 (running mesa 9.1.5).
>>>>
>>>> Anyone know what is causing this or how I could debug it further?
>>>>
>>>> //Martin
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