Refactor defining MTLPixelFormat and GPU capabilities.

- Add MVKMTLDeviceCapabilities to encapsulate Metal GPU family
  capabilities, and use it in MVKPhysicalDevice and MVKPixelFormats
  to identify GPU capabilities.
- Remove all references to MTLGPUFamily and MTLFeatureSet
  outside MVKMTLDeviceCapabilities.
- Blend or select AppleGPU and MacGPU format capabilities.
- Simplify MVKPixelFormats::modifyMTLFormatCapabilities()
  based on MVKMTLDeviceCapabilities.
- Add guard code to ensure MTLPixelFormatInvalid &
  MTLVertexFormatInvalid capabilities are not overwritten
  by other formats that don't exist on some platforms.
- Update MTLPixelFormat capabilities based on latest Metal docs.
- Remove some variations tied to very older OS versions,
  or MTLFeatureSets that have the same GPU family, including
  setting MSL 2.0 as the earliest supported version.
- Enable VkPhysicalDeviceFeatures::vertexPipelineStoresAndAtomics
  & fragmentStoresAndAtomics on all platforms.
- During startup, only log the highest GPU family.

Docs/Whats_New.md

@@ -25,6 +25,7 @@ Released TBD
   return `VK_ERROR_FRAGMENTED_POOL` if failure was due to pool fragmentation.
 - `vkUpdateDescriptorSets()`: Per Vulkan spec, allow write or copy beyond the 
   end of a descriptor binding count, including inline uniform block descriptors.
+- Update `VkFormat` capabilities based on latest Metal docs.
 - Fix rendering issue with render pass that immediately follows a kernel dispatch.
 - Ensure all MoltenVK config info set by `VK_EXT_layer_settings` is used.
 - Move primitive-restart-disabled warning from renderpass to pipeline creation, to reduce voluminous log noise.

MoltenVK/MoltenVK/GPUObjects/MVKDevice.h

@@ -93,6 +93,37 @@ static constexpr VkExtent2D kMVKSampleLocationPixelGridSizeNotSupported = { 0, 0
 typedef NSUInteger MTLTimestamp;
 #endif
 
+
+#pragma mark -
+#pragma mark MVKMTLDeviceCapabilities
+
+typedef struct MVKMTLDeviceCapabilities {
+	bool supportsApple1;
+	bool supportsApple2;
+	bool supportsApple3;
+	bool supportsApple4;
+	bool supportsApple5;
+	bool supportsApple6;
+	bool supportsApple7;
+	bool supportsApple8;
+	bool supportsApple9;
+	bool supportsMac1;
+	bool supportsMac2;
+	bool supportsMetal3;
+
+	bool isAppleGPU;
+	bool supportsBCTextureCompression;
+	bool supportsDepth24Stencil8;
+	bool supports32BitFloatFiltering;
+	bool supports32BitMSAA;
+
+	uint8_t getHighestAppleGPU() const;
+	uint8_t getHighestMacGPU() const;
+
+	MVKMTLDeviceCapabilities(id<MTLDevice> mtlDev);
+} MVKMTLDeviceCapabilities;
+
+
 #pragma mark -
 #pragma mark MVKPhysicalDevice
 
@@ -355,6 +386,9 @@ class MVKPhysicalDevice : public MVKDispatchableVulkanAPIObject {
 	/** Returns the MTLStorageMode that matches the Vulkan memory property flags. */
 	MTLStorageMode getMTLStorageModeFromVkMemoryPropertyFlags(VkMemoryPropertyFlags vkFlags);
 
+	/** Returns the MTLDevice capabilities. */
+	const MVKMTLDeviceCapabilities getMTLDeviceCapabilities() { return _gpuCapabilities; }
+
 
 #pragma mark Construction
 
@@ -413,17 +447,18 @@ class MVKPhysicalDevice : public MVKDispatchableVulkanAPIObject {
 	void populateHostImageCopyProperties(VkPhysicalDeviceHostImageCopyPropertiesEXT* pHostImageCopyProps);
 	void logGPUInfo();
 
-	id<MTLDevice> _mtlDevice;
 	MVKInstance* _mvkInstance;
+	id<MTLDevice> _mtlDevice;
+	const MVKMTLDeviceCapabilities _gpuCapabilities;
 	const MVKExtensionList _supportedExtensions;
+	MVKPixelFormats _pixelFormats;
 	VkPhysicalDeviceFeatures _features;
 	MVKPhysicalDeviceVulkan12FeaturesNoExt _vulkan12FeaturesNoExt;
 	MVKPhysicalDeviceMetalFeatures _metalFeatures;
 	VkPhysicalDeviceProperties _properties;
 	VkPhysicalDeviceTexelBufferAlignmentPropertiesEXT _texelBuffAlignProperties;
 	VkPhysicalDeviceMemoryProperties _memoryProperties;
 	MVKSmallVector<MVKQueueFamily*, kMVKQueueFamilyCount> _queueFamilies;
-	MVKPixelFormats _pixelFormats;
 	VkExternalMemoryProperties _hostPointerExternalMemoryProperties;
 	VkExternalMemoryProperties _mtlBufferExternalMemoryProperties;
 	VkExternalMemoryProperties _mtlTextureExternalMemoryProperties;
@@ -437,7 +472,6 @@ class MVKPhysicalDevice : public MVKDispatchableVulkanAPIObject {
 	uint32_t _privateMemoryTypes;
 	uint32_t _lazilyAllocatedMemoryTypes;
 	bool _hasUnifiedMemory = true;
-	bool _isAppleGPU = true;
 	bool _isUsingMetalArgumentBuffers = true;
 };
 
@@ -896,7 +930,7 @@ class MVKDeviceTrackingMixin {
 	bool isUnifiedMemoryGPU() { return _device->_physicalDevice->_hasUnifiedMemory; }
 
 	/** Returns whether the GPU is Apple Silicon. */
-	bool isAppleGPU() { return _device->_physicalDevice->_isAppleGPU; }
+	bool isAppleGPU() { return _device->_physicalDevice->_gpuCapabilities.isAppleGPU; }
 
 	/** Returns whether this device is using one Metal argument buffer for each descriptor set, on multiple pipeline and pipeline stages. */
 	virtual bool isUsingMetalArgumentBuffers() { return _device->_physicalDevice->_isUsingMetalArgumentBuffers; };
@@ -1068,16 +1102,3 @@ uint64_t mvkGetRegistryID(id<MTLDevice> mtlDevice);
  * the returned value will be zero.
  */
 uint64_t mvkGetLocationID(id<MTLDevice> mtlDevice);
-
-/** Returns whether the MTLDevice supports BC texture compression. */
-bool mvkSupportsBCTextureCompression(id<MTLDevice> mtlDevice);
-
-/** Redefinitions because Mac Catalyst doesn't support feature sets. */
-#if MVK_MACCAT
-#define MTLFeatureSet_macOS_GPUFamily1_v1		MTLGPUFamilyMacCatalyst1
-#define MTLFeatureSet_macOS_GPUFamily1_v2		MTLGPUFamilyMacCatalyst1
-#define MTLFeatureSet_macOS_GPUFamily1_v3		MTLGPUFamilyMacCatalyst1
-#define MTLFeatureSet_macOS_GPUFamily1_v4		MTLGPUFamilyMacCatalyst1
-
-#define MTLFeatureSet_macOS_GPUFamily2_v1		MTLGPUFamilyMacCatalyst2
-#endif