Bill Hollings has announced the release of MoltenVK Vulkan 1.1 Support and Vulkan SDK 1.2.162.

MoltenVK is a driver-level implementation of the Vulkan 1.0 graphics and compute API, that runs on Apple's Metal graphics and compute framework on both iOS and macOS.

MoltenVK allows you to use the Vulkan graphics and compute API to develop modern, cross-platform, high-performance graphical games and applications, and to run them across many platforms, including both iOS and macOS.

• Add support for extensions:
  • VK_KHR_sampler_mirror_clamp_to_edge (iOS)
  • VK_KHR_timeline_semaphore
  • VK_EXT_descriptor_indexing (initial release limited to Metal Tier 1: 96/128 textures, 16 samplers)
  • VK_EXT_post_depth_coverage (macOS)
  • VK_EXT_private_data
  • VK_EXT_subgroup_size_control
  • VK_EXT_texture_compression_astc_hdr
  • VK_AMD_shader_image_load_store (macOS)
  • VK_IMG_format_pvrtc (macOS)
• Support the Mac Catalyst platform for iOS apps on macOS 11.0+,
  under both x86_64 and arm64 architectures.
• Re-enable MTLEvent-based semaphores and fix several MVKSync issues.
• Use VK_KHR_image_format_list to disable MTLTextureUsagePixelFormatView
  if only swizzles or sRGB conversion will be used for image views, improving
  performance on iOS by allowing Metal to use lossless texture compression.
• Handle device loss.
• Fix crash in vkUpdateDescriptorSets() when copying inline block descriptors.
• Fix Metal validation error when unused elements in an array of sampler are not populated by descriptors.
• Fix crashes in vkUseIOSurfaceMVK() on chroma sampling and double releasing ofMTLTexture.
• Fix potential drawable present race conditions.
• Fix crash in vkUpdateDescriptorSets() when copying inline block descriptors.
• Fix Metal validation error when unused elements in an array of sampler are not populated by descriptors.
• Move Metal drawable presentation from MTLCommandBuffer to MTLDrawable
  to improve performance and reduce blocking.
• Allow binding descriptor set using layout different than it was created with.
• Report VkPhysicalDeviceLimits::maxPerStageDescriptorStorageImages as Metal limit of 8.
• Increase per-stage texture count to 96 for A11 SoC's and above.
• Use variable descriptor count when determining descriptor binding count.
• Support setting sizes of SPIR-V unsized arrays.
• Support MTLStorageTypeMemoryless for Apple Silicon on Mac.
• Support Apple GPU pixel formats with Apple Silicon on Mac.
• Allow linear images on Apple GPUs in Blit and Clear commands.
• Apple family 7 GPUs (A14) on iOS support multisample layered rendering,
  as well as sampler border colors and the mirror clamp to edge sampler address mode.
• Set fill mode, depth bias, viewport, and scissor states before clearing attachments
• Disable culling for the duration of vkCmdClearAttachments()
• MVKDevice increase minimum OS for shared-storage textures.
• MVKDevice set properties for Apple Silicon GPUs on macOS.
• MVKQueue only create one GPUCaptureScope per queue.
• MVKSamplerYcbcrConversion always make sure there is one plane.
• MVKPhysicalDevice correct fragment input component limit.
• MVKPhysicalDevice set max visibility buffer size to 256 kiB where supported.
• MVKPhysicalDevice expose support for interpolation functions.
• MVKPhysicalDevice enable 3D compressed textures on iOS/tvOS, and forbid ETC2 and EAC
  3D textures on all platforms. Apple GPUs do not support 3D for those.
• MVKPhysicalDevice enable Apple family 7 features on iOS.
• MVKPhysicalDevice remove need to call initGPUInfoProperties() twice.
• MVKPhysicalDevice correct max descriptor set resources.
• MVKPhysicalDevice reduce maximum point size to 64.
• MVKPhysicalDevice enable strictLines for Intel and NVIDIA.
• MVKPhysicalDevice enable shaderResourceMinLod on iOS.
• MVKPhysicalDevice set correct subgroup properties.
• MVKPhysicalDevice enable texture swizzle on all Apple GPUs.
• MVKPipelineLayout only set configuration result if validating.
• MVKPipeline fix calculation of atomic image buffer addresses.
• MVKPipeline disable rasterization if culling both sides and don't try to add a fragment shader.
• MVKPipeline shorten vertex attribute format's length when stride < size.
• MVKGraphicsPipeline handle minSampleShading.
• MVKImage always use texel buffers for linear images in MTLHeaps.
• MVKImage make sure plane heap offsets are properly aligned.
• MVKImage always set the depth plane when rendering to a 3D image.
• MVKImage avoid swizzling storage and/or attachment image views.
• MVKImage avoid texel buffer for atomics if view format list
  exists and does not include either R32_UINT or R32_SINT format.
• MVKImageView always ignore transfer usages.
• MVKBufferView avoid triggering bytesPerRow validation warning.
• MVKDescriptorSetLayout speed up lookup of descriptor index and streamline binding access.
• MVKCmdBlitImage use layered draws when possible.
• MVKCmdBlitImage add 0.5 to layer index before interpolating.
• MVKCmdBlitImage support depth/stencil blits with inversion and scaling.
• MVKSwapchain allow images whose size doesn't match the CAMetalLayer.
• MVKPixelFormats add 0.5 ULP to clear values for normalized formats.
• MVKCommandEncoder don't set renderTargetArrayLength for mixed 2D/3D renders.
• MVKExtensions add missing tvOS case for unsupported extensions.
• MVKDescriptorSetLayout sort and hold bindings by binding number.
• MVKDescriptor simplify subclass implementations.
• MVKComputePipeline override max threads per threadgroup.
• MVKGPUCapture make sure the MTLCaptureScope has only one reference.
• MoltenShaderConverter fix tvOS build to support tvOS 9.0.
• Support building external libraries and dylibs against sanitizers.
• Clarify documentation on mapping limitations for host-coherent image memory on macOS.
• Add validation policy for MoltenVK development to README.md document.
• Update Xcode build settings check to Xcode 12.2.
• Update VK_MVK_MOLTENVK_SPEC_VERSION to 29.
• Update dependency libraries to match Vulkan SDK 1.2.162.
• Update to latest SPIRV-Cross version:
  • MSL: Support SPV_EXT_demote_to_helper_invocation for MSL 2.3.
  • MSL: Support run-time sized image and sampler arrays
    (GL_EXT_nonuniform_qualifier/SPV_EXT_descriptor_indexing).
  • MSL: Support atomic access to images from argument buffers.
  • MSL: Add missing interlock handling to atomic image buffers.
  • MSL: Fix calculation of atomic image buffer address.
  • MSL: Support querying and modifying generated combined sampler suffix.
  • MSL: Don't use a bitcast for tessellation levels in tesc shaders.
  • MSL: Handle Offset and Grad operands for 1D-as-2D textures.
  • MSL: Don't remove periods from swizzle buffer index exprs.
  • MSL: Correct definitions of subgroup ballot mask variables.
  • MSL: Extract global variables from subgroup ballot operations.
  • MSL: Mask ballots passed to ballot bit ops.
  • MSL: Don't mask off inactive bits in ballot masks.
  • MSL: Support vectors with OpGroupNonUniformAllEqual.
  • MSL: Cast broadcast booleans to ushort.
  • MSL: Do not use component::x gather for depth2d textures.
  • MSL: For 2.1+, don't disable rasterization for vertex writes.
  • MSL: Allow post-depth coverage on Mac in MSL 2.3.
  • MSL: Allow framebuffer fetch on Mac in MSL 2.3.
  • MSL: Allow Bias and Grad arguments with comparison on Mac in MSL 2.3.
  • MSL: Support pull-model interpolation on MSL 2.3+
  • MSL: Expand subgroup support.
  • MSL: Adjust FragCoord for sample-rate shading.
  • MSL: Expose some more features on iOS: min_lod_clamp(), simd_is_helper_thread(),
    barycentric_coord, and primitive_id.
  • MSL: Don't add fixup hooks for builtin variables if they're unused.
  • MSL: Don't try to use [[thread_index_in_simdgroup]] in vertex shaders.
  • Handle case where block is loop header, continue AND break block.
  • MSL: Added fmin3 and fmax3 library functions to the illegal name list.
  • Added Metal keyword: level.
  • Parser: Don't assume OpTypePointer will always take a SPIRType.
  • Add MIT dual license for the SPIRV-Cross API and CLI.

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