[hwc PATCH v1] drm_hwcomposer: reorder source layers according to zorder

[Zach Reizner]

On Thu, Sep 21, 2017 at 4:53 PM, Adrian Salido <salidoa at google.com> wrote:
> Precomp layers may be added to the back at different points which may
> cause elements to be unsorted. Make sure that these are sorted after
> provisioning planes to ensure right composition based on zorder.
>
> Signed-off-by: Adrian Salido <salidoa at google.com>
Reviewed-by: Zach Reizner <zachr at chromium.org>
> ---
>  drmdisplaycomposition.cpp | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drmdisplaycomposition.cpp b/drmdisplaycomposition.cpp
> index 293160bfd012..0f8084b39706 100644
> --- a/drmdisplaycomposition.cpp
> +++ b/drmdisplaycomposition.cpp
> @@ -379,6 +379,9 @@ int DrmDisplayComposition::Plan(SquashState *squash,
>      if (!i.plane())
>        continue;
>
> +    // make sure that source layers are ordered based on zorder
> +    std::sort(i.source_layers().begin(), i.source_layers().end());
> +
>      std::vector<DrmPlane *> *container;
>      if (i.plane()->type() == DRM_PLANE_TYPE_PRIMARY)
>        container = primary_planes;
> --
> 2.14.1.821.g8fa685d3b7-goog
>
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