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meta: Add CHANGELOG for 2.10.
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Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
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HansKristian-Work committed Sep 8, 2023
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# Change Log

## 2.10

This release rolls up a ton of bug fixes, game and driver workarounds, and other improvements.

### Features

#### DirectStorage MetaCommands

We can now make use of `NV_memory_decompression` to implement
GPU accelerated GDeflate compression in DirectStorage.
This is demonstrated to work in Ratchet & Clank: Rift Apart.

We also worked around an NV driver bug when using the fallback GDeflate shader.
The fallback works on RADV.

#### Enhanced Barriers

NOTE: This isn't all that well tested because there are no games shipping with this yet to our knowledge.

#### Device generated commands for compute

With `NV_device_generated_commands_compute` we can efficiently implement
Starfield's use of ExecuteIndirect which hammers multi-dispatch COMPUTE + root parameter changes.
Previously, we would rely on a very slow workaround.

NOTE: This feature is currently only enabled on RADV due to driver issues.

#### Misc

- Support Root Signature version 1.2
- Implement Shader Model 6.7
- Includes all SM 6.7 features like AdvancedTextureOps, WaveOpsIncludeHelperLanes
- Caveat: Technically not Vulkan spec compliant implementation, but works fine on at least NV and RADV. Currently implemented as an opt-in option for now in case some game relies on it to work
- Implement CreateSampler2
- Expose inverted viewport / height feature
- Implement RelaxedFormatCasting feature from Enhanced Barriers
- Implement support for adjacency topologies
- Support A8_UNORM format properly by using `VK_KHR_maintenance5`, allowing A8_UNORM UAVs to work correctly
- Handle range checked index buffers correctly with `VK_KHR_maintenance5`

#### New extension use

- VK_EXT_dynamic_rendering_unused_attachments
- VK_KHR_maintenance5
- VK_NV_device_generated_commands_compute

### Performance

- Batch acceleration structure builds. Massively improves build performance on at least RADV.
- Massively improve ExecuteIndirect performance when using COMPUTE + root parameter changes when `VK_NV_device_generated_commands_compute` is enabled.

### Fixes

- Fix root signature creation from DXIL library target (DXR) blobs
- Fix some dual source blending PSOs scenarios. Fixes Star Wars Battlefront II
- Implement wave operations in pixel shaders more strictly according to D3D12 rules
- Fix spurious hangs in Ashes of Singularity when using shared fences and wait-before-signal
- Fix PSO caching bug in mesh shaders. Fixes mesh shaders in Unreal Engine 5
- Fix udiv remainder in DXBC, which fixed some Xenia bugs
- Fix query heap tracking bug that was exposed by NV Streamline
- Various DXIL -> SPIR-V fixes as usual
- Rewrote descriptor set layouts to be more robust against application bugs
- Motivated by Armored Core VI bug (see below)
- Native D3D12 drivers are also robust against these application bugs :(

### Workarounds

- Workaround bad ReBAR performance in Age of Wonders 4
- Remove workaround for `KHR_present_wait` on NV 535+ drivers
- Workaround Starfield memory corruption issue where it does not correctly query for 4 KiB alignment
- Disable ReBAR usage on Halo Infinite to workaround very poor CPU performance
- Workaround Street Fighter 6 bug causing spurious GPU hangs
- Also appears to have worked around GPU hangs in Resident Evil 2
- Workaround Armored Core VI bug causing GPU hang on Balteus fight in chapter 1
- Workaround "firefly" glitches in Resident Evil 4 caused by dubious min16float usage
- Workaround "firefly" glitches in Monster Hunter Rise caused by dubious shader requiring particular precise math
- Workaround Unreal Engine 5 breaking if mesh shaders are exposed, but not barycentrics
- Workaround NV driver bug with TIMESTAMP query heaps that could cause spurious GPU hangs
- Workaround broken CFG code generation in Xenia's DXBC emitter

## 2.9

This release rolls up various development happening over the last months.
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