docs/zink: document rgtc requirement

OpenGL 3.0 requires RGTC support, and until we have emulation in place,
we should document that requirement.

Fixes: d50e8554b99 ("zink: add feature-documentation")
Acked-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18549>

diff --git a/docs/drivers/zink.rst b/docs/drivers/zink.rst
index f5a7469..bc5b6fd 100644 (file)
--- a/docs/drivers/zink.rst
+++ b/docs/drivers/zink.rst
@@ -75,6 +75,12 @@ supported:
   * `VK_EXT_transform_feedback`_
   * `VK_EXT_conditional_rendering`_
 
+* Formats requiring ``VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT``:
+
+   * ``VK_FORMAT_BC4_UNORM_BLOCK``
+   * ``VK_FORMAT_BC4_SNORM_BLOCK``
+   * ``VK_FORMAT_BC5_UNORM_BLOCK``
+   * ``VK_FORMAT_BC5_SNORM_BLOCK``
 
 OpenGL 3.1
 ^^^^^^^^^^