Goal here is to avoid unnecessary image layout transitions when render
passes toggle depth-stencil PSO states. Since we cannot know which
states a resource is in, we have to be conservative, and assume that
shader reads *could* happen.
The best effort we can do is to detect when writes happen to a DSV
resource. In this scenario, we can deduce that the aspect cannot be
read, since DEPTH_WRITE | RESOURCE state is not allowed.
To make the tracking somewhat sane, we only promote to OPTIMAL if an
entire image's worth of subresources for a given aspect is transitioned.
The common case for depth-stencil images is 1 mip / 1 layer anyways.
Some other changes are required here:
- Instead of common_layout for the depth image, we need to consult the
command list, which might promote the layout to optimal.
- We make use of render pass compatibility rules which state that we can
change attachment reference layouts as well as initial/finalLayout.
To make this change, a pipeline will fill in a
vkd3d_render_pass_compat struct.
- A command list has a dsv_plane_optimal_mask which keeps track
of the plane aspects we have promoted to OPTIMAL, and we know cannot
be read by shaders.
The desired optimal mask is (existing optimal | PSO write).
The initial existing optimal is inherited from the command list's
tracker.
- RTV/DSV/views no longer keep track of VkImageLayout. This is
unnecessary since we always deduce image layout based on context.
Overall, this shows a massive gain in HZD benchmark (RADV, 1440p ultimate, ~16% FPS on RX 6800).
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Idea is to keep track of scenarios where we know a resource's aspect is
known to be in a OPTIMAL state. Based on this, we can override the image
layout from the common_layout in order to avoid unnecessary full
barriers.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
For copies, we can always use the intended aspects, since we have
separate DS layouts now.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
When clearing a DSV, we must get aliasing guarantees, so we must
transition away from UNDEFINED. This is only possible when using
separate_ds_layouts and for render pass clears we need to use
renderpass2 mechanisms to do this.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
The clamp is absolute, not relative to baseMip. Also avoids validation
error and potential crash when LODClamp > numLevels.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Not correct, will need spec additions to handle it properly.
Fixes ground rendering in DIRT 5.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Lets calling code know if it should use ALLOW_VARYING_SUBGROUP_SIZE.
To avoid too much churn on pipeline caches, only add the flag when
needed.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
GravityBench ends up using ClearView with too large dimensions.
This is a validation error in Vulkan, so just clamp the extents.
To make full rect detection a bit more robust, do a range check instead
of memcmp().
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Hans-Kristian Arntzen
Joshua Ashton
rochaudhari
Paul Gofman
Georg Lehmann