[Mesa-dev] [PATCH] st/mesa: enable GL_KHR_robustness
Bas Nieuwenhuizen
bas at basnieuwenhuizen.nl
Wed Sep 28 22:00:28 UTC 2016
On Wed, Sep 28, 2016 at 6:27 PM, Nicolai Hähnle <nhaehnle at gmail.com> wrote:
> On 28.09.2016 16:20, Ilia Mirkin wrote:
>>
>> On Wed, Sep 28, 2016 at 6:25 AM, Nicolai Hähnle <nhaehnle at gmail.com>
>> wrote:
>>>
>>> From: Nicolai Hähnle <nicolai.haehnle at amd.com>
>>>
>>> The difference to the virtually identical ARB_robustness (which is
>>> already
>>> enabled unconditionally) is miniscule and handled elsewhere, but this set
>>> of caps seems like the right thing to require for this extension.
>>> ---
>>> docs/features.txt | 2 +-
>>> docs/relnotes/12.1.0.html | 1 +
>>> src/mesa/state_tracker/st_extensions.c | 4 ++++
>>> 3 files changed, 6 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/docs/features.txt b/docs/features.txt
>>> index fbb3952..52d194e 100644
>>> --- a/docs/features.txt
>>> +++ b/docs/features.txt
>>> @@ -211,21 +211,21 @@ GL 4.5, GLSL 4.50:
>>> GL_ARB_ES3_1_compatibility DONE (i965/hsw+,
>>> nvc0, radeonsi)
>>> GL_ARB_clip_control DONE (i965,
>>> nv50, nvc0, r600, radeonsi, llvmpipe, softpipe, swr)
>>> GL_ARB_conditional_render_inverted DONE (i965,
>>> nv50, nvc0, r600, radeonsi, llvmpipe, softpipe, swr)
>>> GL_ARB_cull_distance DONE (i965,
>>> nv50, nvc0, radeonsi, llvmpipe, softpipe, swr)
>>> GL_ARB_derivative_control DONE (i965,
>>> nv50, nvc0, r600, radeonsi)
>>> GL_ARB_direct_state_access DONE (all
>>> drivers)
>>> GL_ARB_get_texture_sub_image DONE (all
>>> drivers)
>>> GL_ARB_shader_texture_image_samples DONE (i965,
>>> nv50, nvc0, r600, radeonsi)
>>> GL_ARB_texture_barrier DONE (i965,
>>> nv50, nvc0, r600, radeonsi)
>>> GL_KHR_context_flush_control DONE (all - but
>>> needs GLX/EGL extension to be useful)
>>> - GL_KHR_robustness DONE (i965)
>>> + GL_KHR_robustness DONE (i965,
>>> radeonsi)
>>> GL_EXT_shader_integer_mix DONE (all
>>> drivers that support GLSL)
>>>
>>> These are the extensions cherry-picked to make GLES 3.1
>>> GLES3.1, GLSL ES 3.1 -- all DONE: i965/hsw+, nvc0, radeonsi
>>>
>>> GL_ARB_arrays_of_arrays DONE (all
>>> drivers that support GLSL 1.30)
>>> GL_ARB_compute_shader DONE
>>> (i965/gen7+, softpipe)
>>> GL_ARB_draw_indirect DONE
>>> (i965/gen7+, r600, llvmpipe, softpipe, swr)
>>> GL_ARB_explicit_uniform_location DONE (all
>>> drivers that support GLSL)
>>> GL_ARB_framebuffer_no_attachments DONE
>>> (i965/gen7+, r600, softpipe)
>>> diff --git a/docs/relnotes/12.1.0.html b/docs/relnotes/12.1.0.html
>>> index cdd8909..0c99f19 100644
>>> --- a/docs/relnotes/12.1.0.html
>>> +++ b/docs/relnotes/12.1.0.html
>>> @@ -52,20 +52,21 @@ Note: some of the new features are only available
>>> with certain drivers.
>>> <li>GL_ARB_cull_distance on radeonsi</li>
>>> <li>GL_ARB_enhanced_layouts on i965</li>
>>> <li>GL_ARB_indirect_parameters on radeonsi</li>
>>> <li>GL_ARB_shader_draw_parameters on radeonsi</li>
>>> <li>GL_ARB_shader_group_vote on nvc0</li>
>>> <li>GL_ARB_shader_viewport_layer_array on i965/gen6+</li>
>>> <li>GL_ARB_stencil_texturing on i965/hsw</li>
>>> <li>GL_ARB_texture_stencil8 on i965/hsw</li>
>>> <li>GL_EXT_window_rectangles on nv50, nvc0</li>
>>> <li>GL_KHR_blend_equation_advanced on i965</li>
>>> +<li>GL_KHR_robustness on radeonsi</li>
>>> <li>GL_KHR_texture_compression_astc_sliced_3d on i965</li>
>>> <li>GL_OES_copy_image on nv50, nvc0, r600, radeonsi, softpipe,
>>> llvmpipe</li>
>>> <li>GL_OES_geometry_shader on i965/gen8+, nvc0, radeonsi</li>
>>> <li>GL_OES_primitive_bounding_box on i965/gen7+, nvc0, radeonsi</li>
>>> <li>GL_OES_texture_cube_map_array on i965/gen8+, nvc0, radeonsi</li>
>>> <li>GL_OES_tessellation_shader on i965/gen7+, nvc0, radeonsi</li>
>>> <li>GL_OES_viewport_array on nvc0, radeonsi</li>
>>> <li>GL_ANDROID_extension_pack_es31a on i965/gen9+</li>
>>> </ul>
>>>
>>> diff --git a/src/mesa/state_tracker/st_extensions.c
>>> b/src/mesa/state_tracker/st_extensions.c
>>> index 4f42217..4789f2c 100644
>>> --- a/src/mesa/state_tracker/st_extensions.c
>>> +++ b/src/mesa/state_tracker/st_extensions.c
>>> @@ -1192,20 +1192,24 @@ void st_init_extensions(struct pipe_screen
>>> *screen,
>>> consts->MaxComputeWorkGroupCount[i] = grid_size[i];
>>> consts->MaxComputeWorkGroupSize[i] = block_size[i];
>>> }
>>>
>>> extensions->ARB_compute_shader =
>>>
>>> extensions->ARB_shader_image_load_store &&
>>>
>>> extensions->ARB_shader_atomic_counters;
>>> }
>>> }
>>>
>>> + extensions->KHR_robustness =
>>> + extensions->ARB_robust_buffer_access_behavior &&
>>> + screen->get_param(screen, PIPE_CAP_DEVICE_RESET_STATUS_QUERY);
>>
>>
>> Is that necessary? From what I can tell, a no-op implementation is
>> sufficient for KHR_robustness.
>
>
> The extension does talk about buffer robustness. For the reset notification
> business, I also don't think the spec really has a lot of teeth. I just
> thought that checking this cap is what's most in line with the spirit of the
> extension.
I think it has some teeth though:
"After a graphics reset has occurred on a context, subsequent GL commands
on that context (or any context which shares with that context) will
generate a CONTEXT_LOST error."
(https://www.opengl.org/registry/specs/KHR/robustness.txt)
Since IIRC gallium uses LOSE_CONTEXT_ON_RESET as reset notification
behavior, we should at least generate the CONTEXT_LOST errors after a
GetGraphicsResetStatus call that indicates a reset.
I agree that this can be somewhat theoretical though.
- Bas
>
> Right now, I think it only makes a difference for nvc0. I can drop that part
> of the check if you prefer. I really don't have a strong opinion about this.
>
> Cheers,
> Nicolai
>
>
>>
>>> +
>>> /* If we support ES 3.1, we support the ES3_1_compatibility ext.
>>> However
>>> * there's no clean way of telling whether we would support ES 3.1
>>> from
>>> * here, so copy the condition from compute_version_es2 here. A lot
>>> of
>>> * these are redunant, but simpler to just have a (near-)exact copy
>>> here.
>>> */
>>> extensions->ARB_ES3_1_compatibility =
>>> extensions->ARB_ES3_compatibility &&
>>> extensions->ARB_arrays_of_arrays &&
>>> extensions->ARB_compute_shader &&
>>> extensions->ARB_draw_indirect &&
>>> --
>>> 2.7.4
>>>
>>> _______________________________________________
>>> mesa-dev mailing list
>>> mesa-dev at lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/mesa-dev
>
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