[Mesa-stable] [Mesa-dev] [PATCH 08/18] anv/blorp: Ignore clears for attachments first used as resolve destinations

[Jason Ekstrand]

On Fri, Oct 28, 2016 at 3:00 PM, Nanley Chery <nanleychery at gmail.com> wrote:

> On Fri, Oct 28, 2016 at 02:17:04AM -0700, Jason Ekstrand wrote:
> > Otherwise, we'll try to clear it the first time it's used as a draw so if
> > you do some multisampled rendering, resolve to an attachment, and then
> draw
> > on top of the single-sampled attachment, we might accidentally clear it.
> >
> > Signed-off-by: Jason Ekstrand <jason at jlekstrand.net>
> > Cc: "13.0" <mesa-stable at lists.freedesktop.org>
> > ---
> >  src/intel/vulkan/anv_blorp.c | 22 +++++++++++++---------
> >  1 file changed, 13 insertions(+), 9 deletions(-)
> >
> > diff --git a/src/intel/vulkan/anv_blorp.c b/src/intel/vulkan/anv_blorp.c
> > index 9ea6e3f..0e70e9b 100644
> > --- a/src/intel/vulkan/anv_blorp.c
> > +++ b/src/intel/vulkan/anv_blorp.c
> > @@ -1185,15 +1185,6 @@ anv_cmd_buffer_resolve_subpass(struct
> anv_cmd_buffer *cmd_buffer)
> >     struct anv_framebuffer *fb = cmd_buffer->state.framebuffer;
> >     struct anv_subpass *subpass = cmd_buffer->state.subpass;
> >
> > -   /* FINISHME(perf): Skip clears for resolve attachments.
> > -    *
> > -    * From the Vulkan 1.0 spec:
> > -    *
> > -    *    If the first use of an attachment in a render pass is as a
> resolve
> > -    *    attachment, then the loadOp is effectively ignored as the
> resolve is
> > -    *    guaranteed to overwrite all pixels in the render area.
> > -    */
> > -
> >     if (!subpass->has_resolve)
> >        return;
> >
> > @@ -1207,6 +1198,19 @@ anv_cmd_buffer_resolve_subpass(struct
> anv_cmd_buffer *cmd_buffer)
> >        if (dst_att == VK_ATTACHMENT_UNUSED)
> >           continue;
> >
> > +      if (cmd_buffer->state.attachments[dst_att].pending_clear_aspects)
> {
> > +         /* FINISHME(perf): Skip clears for resolve attachments.
>
> Shouldn't this FINISHME be removed?
>

Yes, yes it should...  Fixed locally.


> > +          *
> > +          * From the Vulkan 1.0 spec:
> > +          *
> > +          *    If the first use of an attachment in a render pass is as
> a
> > +          *    resolve attachment, then the loadOp is effectively
> ignored
> > +          *    as the resolve is guaranteed to overwrite all pixels in
> the
> > +          *    render area.
> > +          */
> > +         cmd_buffer->state.attachments[dst_att].pending_clear_aspects
> = 0;
> > +      }
> > +
> >        struct anv_image_view *src_iview = fb->attachments[src_att];
> >        struct anv_image_view *dst_iview = fb->attachments[dst_att];
> >
> > --
> > 2.5.0.400.gff86faf
> >
> > _______________________________________________
> > mesa-dev mailing list
> > mesa-dev at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/mesa-dev
>
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