[Piglit] [PATCH] texturing: add full "round trip" test of array depth textures.

[Chad Versace]

On 08/23/2012 05:00 PM, Paul Berry wrote:
> This test provokes a bug in Mesa as of 8/23/12 (commit 1cb07bd): when
> fast depth clears are performed on multiple layers of a multilayer
> depth texture (such as a 2D array or a cubemap texture), the
> implementation doesn't properly track the need for depth resolves,
> resulting in incorrect data when the texture is later used for
> texturing.  See https://bugs.freedesktop.org/show_bug.cgi?id=50270.
> 
> Although the bug was initially discovered using cubemap textures, this
> test provokes it using a 2D array texture, so that we don't have to
> reason about the coordinate transformations involved in cube map
> texture lookup.
> ---
>  tests/all.tests                         |    1 +
>  tests/texturing/CMakeLists.gl.txt       |    1 +
>  tests/texturing/array-depth-roundtrip.c |  203 +++++++++++++++++++++++++++++++
>  3 files changed, 205 insertions(+), 0 deletions(-)
>  create mode 100644 tests/texturing/array-depth-roundtrip.c

Reviewed-by: Chad Versace <chad.versace at linux.intel.com>