On Fri, Jul 15, 2016 at 9:57 AM, Nanley Chery <nanleych...@gmail.com> wrote:
> On Thu, Jul 14, 2016 at 09:20:08PM -0700, Jason Ekstrand wrote:
> > The old calculation, which used view->offset, encorporated buffer->offset
> > into the size calculation where it doesn't belong. This meant that, if
> > buffer->offset > buffer->size, you would always get a negative size.
> This
> > fixes 170 dEQP-VK.renderpass.attachment.* Vulkan CTS tests on Haswell.
> >
>
> Nice patch.
>
> > Signed-off-by: Jason Ekstrand <ja...@jlekstrand.net>
> > Cc: "12.0" <mesa-sta...@lists.freedesktop.org>
> > ---
> > src/intel/vulkan/anv_image.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/src/intel/vulkan/anv_image.c b/src/intel/vulkan/anv_image.c
> > index 23fdd93..fe5b124 100644
> > --- a/src/intel/vulkan/anv_image.c
> > +++ b/src/intel/vulkan/anv_image.c
> > @@ -631,7 +631,7 @@ void anv_buffer_view_init(struct anv_buffer_view
> *view,
> > view->bo = buffer->bo;
> > view->offset = buffer->offset + pCreateInfo->offset;
> > view->range = pCreateInfo->range == VK_WHOLE_SIZE ?
> > - buffer->size - view->offset : pCreateInfo->range;
> > + buffer->size - pCreateInfo->offset :
> pCreateInfo->range;
> >
>
> This is almost correct. The range member definition (11.2. Buffer Views)
> has a corner case for VK_WHOLE_SIZE. It states that if
> R = (buffer_size - buffer_view_offset) is not a multiple of
> buffer_view_format_size, then you must set the range member to
> the nearest smaller multiple of buffer_view_format_size.
>
Thanks for your care! I was not thinking of that corner-case.
> Which is to say,
> if (requested_range == VK_WHOLE_SIZE)
> actual_range = ALIGN_DOWN(R, buffer_view_format_size);
>
That said, the hardware packet is in number of elements so we divide by the
format size and round down in isl_buffer_fill_state so I think it's ok.
--Jason
>
> - Nanley
>
> > if (buffer->usage & VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT) {
> > view->surface_state = alloc_surface_state(device, cmd_buffer);
> > --
> > 2.5.0.400.gff86faf
> >
> > _______________________________________________
> > mesa-dev mailing list
> > mesa-dev@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/mesa-dev
>
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/mesa-dev
