Ella Stanforth authored Jul 28, 2022 and Marge Bot committed Jan 16, 2023

Original patches wrote by Ella Stanforth.

Alejandro Piñeiro main changes (skipping the small fixes/typos):
  * Reduced the list of supported formats to
    VK_FORMAT_G8_B8_R8_3PLANE_420_UNORM and
    VK_FORMAT_G8_B8R8_2PLANE_420_UNORM, that are the two only
    mandatory by the spec.
  * Fix format features exposed with YCbCr:
    * Disallow some features not supported with YCbCr (like blitting)
    * Disallow storage image support. Not clear if really useful. Even
      if there are CTS tests, there is an ongoing discussion about the
      possibility to remove them.
    * Expose VK_FORMAT_FEATURE_COSITED_CHROMA_SAMPLES_BIT, that is
      mandatory for the formats supported.
    * Not expose VK_FORMAT_FEATURE_2_MIDPOINT_CHROMA_SAMPLES_BIT. Some
      CTS tests are failing right now, and it is not mandatory. Likely
      to be revisit later.
    * We are keeping VK_FORMAT_FEATURE_2_DISJOINT_BIT and
      VK_FORMAT_FEATURE_2_MIDPOINT_CHROMA_SAMPLES_BIT. Even if they
      are optional, it is working with the two formats that we are
      exposing. Likely that will need to be refined if we start to
      expose more formats.
  * create_image_view: don't use hardcoded 0x70, but instead doing an
    explicit bit or of VK_IMAGE_ASPECT_PLANE_0/1/2_BIT
  * image_format_plane_features: keep how supported aspects and
    separate stencil check is done. Even if the change introduced was
    correct (not sure about that though), that change is unrelated to
    this work
  * write_image_descriptor: add additional checks for descriptor type,
    to compute properly the offset.
  * Cosmetic changes (don't use // for comments, capital letters, etc)
  * Main changes coming from the review:
     * Not use image aliases. All the info is already on the image
       planes, and some points of the code were confusing as it was
       using always a hardcoded plane 0.
     * Squashed the two original main patches. YCbCr conversion was
       leaking on the multi-planar support, as some support needed
       info coming from the ycbcr structs.
     * Not expose the extension on Android, and explicitly assert that
       we expect plane_count to be 1 always.
  * For a full list of review changes  see MR#19950

Signed-off-by: Ella Stanforth <estanforth@igalia.com>
Signed-off-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <!19950>