From ca59c3f4998e2d1beb3b0d0214611e3332238557 Mon Sep 17 00:00:00 2001
From: riperiperi <rhy3756547@hotmail.com>
Date: Mon, 2 Sep 2024 01:28:16 +0100
Subject: Vulkan: Feedback loop detection and barriers (#7226)

* Vulkan: Feedback loop improvements

This PR allows the Vulkan backend to detect attachment feedback loops. These are currently used in the following ways:

- Partial use of VK_EXT_attachment_feedback_loop_layout
  - All renderable textures have AttachmentFeedbackLoopBitExt
  - Compile pipelines with Color/DepthStencil feedback loop flags when present
- Support using FragmentBarrier for feedback loops (fixes regressions from https://github.com/Ryujinx/Ryujinx/pull/7012 )

TODO:
- AMD GPUs may need layout transitions for it to properly allow textures to be used in feedback loops.
- Use dynamic state for feedback loops. The background pipeline will always miss since feedback loop state isn't known on the GPU project.
- How is the barrier dependency flag used? (DXVK just ignores it, there's no vulkan validation...)
- Improve subpass dependencies to fix validation errors

* Mark field readonly

* Add feedback loop dynamic state

* fix: add MoltenVK resolver workaround

fix: add MoltenVK resolver workaround

* Formatting

* Fix more complaints

* RADV dcc workaround

* Use dynamic state properly, cleanup.

* Use aspects flags in more places
---
 src/Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs')

diff --git a/src/Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs b/src/Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs
index b6694bcb..bd17867b 100644
--- a/src/Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs
+++ b/src/Ryujinx.Graphics.Vulkan/HardwareCapabilities.cs
@@ -46,6 +46,8 @@ namespace Ryujinx.Graphics.Vulkan
         public readonly bool SupportsViewportArray2;
         public readonly bool SupportsHostImportedMemory;
         public readonly bool SupportsDepthClipControl;
+        public readonly bool SupportsAttachmentFeedbackLoop;
+        public readonly bool SupportsDynamicAttachmentFeedbackLoop;
         public readonly uint SubgroupSize;
         public readonly SampleCountFlags SupportedSampleCounts;
         public readonly PortabilitySubsetFlags PortabilitySubset;
@@ -84,6 +86,8 @@ namespace Ryujinx.Graphics.Vulkan
             bool supportsViewportArray2,
             bool supportsHostImportedMemory,
             bool supportsDepthClipControl,
+            bool supportsAttachmentFeedbackLoop,
+            bool supportsDynamicAttachmentFeedbackLoop,
             uint subgroupSize,
             SampleCountFlags supportedSampleCounts,
             PortabilitySubsetFlags portabilitySubset,
@@ -121,6 +125,8 @@ namespace Ryujinx.Graphics.Vulkan
             SupportsViewportArray2 = supportsViewportArray2;
             SupportsHostImportedMemory = supportsHostImportedMemory;
             SupportsDepthClipControl = supportsDepthClipControl;
+            SupportsAttachmentFeedbackLoop = supportsAttachmentFeedbackLoop;
+            SupportsDynamicAttachmentFeedbackLoop = supportsDynamicAttachmentFeedbackLoop;
             SubgroupSize = subgroupSize;
             SupportedSampleCounts = supportedSampleCounts;
             PortabilitySubset = portabilitySubset;
-- 
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