On Thu, Mar 21, 2019 at 2:19 PM Ilia Mirkin <imir...@alum.mit.edu> wrote:
>
> On Thu, Mar 21, 2019 at 1:45 PM Rob Clark <robdcl...@gmail.com> wrote:
> >
> > For GLES2+ contexts, enable EXT_gpu_shader5 if the driver exposes a
> > sufficiently high ESSL feature level, even if the GLSL feature level
> > isn't high enough.
> >
> > This allows drivers to support EXT_gpu_shader5 in GLES contexts before
> > they support all the additional features of ARB_gpu_shader5 in GL
> > contexts.
> >
> > We can also use this cap to enable ARB_ES3_1_compatibility.
>
> I believe this is no longer the case, so probably remove that line.
> Also, all the cool people talk about the OES_* variants of the exts...
> Doesn't really matter, of course. They're identical.
>
> >
> > Signed-off-by: Rob Clark <robdcl...@gmail.com>
> > ---
> > This kinda morphed into also fixing OES_viewport_array (which should
> > depend on GLES 3.2)
> >
> > src/mesa/state_tracker/st_extensions.c | 24 +++++++++++++++++-------
> > 1 file changed, 17 insertions(+), 7 deletions(-)
> >
> > diff --git a/src/mesa/state_tracker/st_extensions.c
> > b/src/mesa/state_tracker/st_extensions.c
> > index c953bfd9f7a..7c3b98c1ba6 100644
> > --- a/src/mesa/state_tracker/st_extensions.c
> > +++ b/src/mesa/state_tracker/st_extensions.c
> > @@ -1056,6 +1056,8 @@ void st_init_extensions(struct pipe_screen *screen,
> > consts->GLSLVersionCompat =
> > screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY);
> >
> > + const unsigned ESSLVersion =
> > + screen->get_param(screen, PIPE_CAP_ESSL_FEATURE_LEVEL);
> > const unsigned GLSLVersion =
> > api == API_OPENGL_COMPAT ? consts->GLSLVersionCompat :
> > consts->GLSLVersion;
> > @@ -1077,6 +1079,13 @@ void st_init_extensions(struct pipe_screen *screen,
> >
> > consts->AllowGLSLCrossStageInterpolationMismatch =
> > options->allow_glsl_cross_stage_interpolation_mismatch;
> >
> > + /* Technically we are turning on the EXT_gpu_shader5 extension,
> > + * ARB_gpu_shader5 does not exist in GLES, but this flag is what
> > + * switches on EXT_gpu_shader5:
> > + */
> > + if (api == API_OPENGLES2 && ESSLVersion >= 320)
> > + extensions->ARB_gpu_shader5 = GL_TRUE;
> > +
> > if (GLSLVersion >= 400)
> > extensions->ARB_gpu_shader5 = GL_TRUE;
> > if (GLSLVersion >= 410)
> > @@ -1540,16 +1549,12 @@ void st_init_extensions(struct pipe_screen *screen,
> > extensions->EXT_shader_integer_mix;
> >
> > extensions->OES_texture_cube_map_array =
> > - extensions->ARB_ES3_1_compatibility &&
> > + (extensions->ARB_ES3_1_compatibility || ESSLVersion >= 310) &&
>
> It's a bit more work, but if you get all the drivers to properly
> expose this cap, you could make this *just* ESSLVersion >= x, instead
> of also relying on the ARB_* thing. Totally your call, just wanted to
> make the observation.
>
> > extensions->OES_geometry_shader &&
> > extensions->ARB_texture_cube_map_array;
> >
> > - extensions->OES_viewport_array =
> > - extensions->ARB_ES3_1_compatibility &&
> > - extensions->OES_geometry_shader &&
> > - extensions->ARB_viewport_array;
> > -
> > - extensions->OES_primitive_bounding_box =
> > extensions->ARB_ES3_1_compatibility;
> > + extensions->OES_primitive_bounding_box =
> > + extensions->ARB_ES3_1_compatibility || (ESSLVersion >= 310);
> > consts->NoPrimitiveBoundingBoxOutput = true;
> >
> > extensions->ANDROID_extension_pack_es31a =
> > @@ -1590,6 +1595,11 @@ void st_init_extensions(struct pipe_screen *screen,
> > extensions->ARB_texture_stencil8 &&
> > extensions->ARB_texture_multisample;
> >
> > + extensions->OES_viewport_array =
> > + (extensions->ARB_ES3_2_compatibility || ESSLVersion >= 320) &&
>
> Why is this getting bumped up to needing ES 3.2? Did you mean to leave
> this at ES3_1_compat || ESSL >= 310?
>
> "OpenGL ES 3.2, EXT_geometry_shader or OES_geometry_shader is
> required." (Note the "or". Otherwise it'd make no sense since ES 3.2
> includes geometry shaders as core functionality.)
yeah, moving it was intentional, but maybe based on mis-parsing the
spec dependencies and applying the 'C' order of operator precedence to
english.. :-P
BR,
-R
>
>
> > + extensions->OES_geometry_shader &&
> > + extensions->ARB_viewport_array;
> > +
> > if (screen->get_param(screen,
> > PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES) &&
> > screen->get_param(screen,
> > PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES) &&
> > screen->get_param(screen,
> > PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE)) {
> > --
> > 2.20.1
> >
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