When the application uses depth values outside of the [0.0,1.0] range
with VK_EXT_depth_range_unrestricted, or when explicitly disabled.
Otherwise, the driver can clamp to [0.0,1.0] internally for optimal
performance.
From the Vulkan spec "in 28.10.1. Depth Clamping and Range Adjustment":
"If depth clamping is not enabled and zf is not in the range [0, 1]
and either VK_EXT_depth_range_unrestricted is not enabled, or the
depth attachment has a fixed-point format, then zf is undefined
following this step."
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16349>
Samuel Pitoiset
203afc9351