Fix regression error and properties in point-topology/polygon-mode behavior.

- MVKGraphicsPipeline::isRenderingPoints() fix regression error
  to support dynamically setting point topology.
- Move emulation of VK_POLYGON_MODE_POINT in Metal, if the polygon model is static,
  to MVKRenderingCommandEncoderState, to handle dynamic setting of topology.
- MVKDevice populate VkPhysicalDeviceExtendedDynamicState3PropertiesEXT.
- Move error reporting in mvkMTLTriangleFillModeFromVkPolygonModeInObj() to encoding.
- MVKRenderingCommandEncoderState::setCullMode() use getContent()
  for readability and consistency (unrelated).
- Pass pipeline object to datatype functions for reporting accuracy (unrelated).

MoltenVK/MoltenVK/Commands/MVKCommandEncoderState.h

@@ -332,6 +332,7 @@ protected:
 	bool _mtlPrimitiveRestartEnable[StateScope::Count] = {};
 	bool _mtlRasterizerDiscardEnable[StateScope::Count] = {};
 	bool _cullBothFaces[StateScope::Count] = {};
+	bool _isPolygonModePoint[StateScope::Count] = {};
 };
 
 

MoltenVK/MoltenVK/Commands/MVKCommandEncoderState.mm

@@ -302,7 +302,7 @@ void MVKDepthStencilCommandEncoderState::encodeImpl(uint32_t stage) {
 void MVKRenderingCommandEncoderState::setCullMode(VkCullModeFlags cullMode, bool isDynamic) {
 	auto mtlCullMode = mvkMTLCullModeFromVkCullModeFlags(cullMode);
 	setMTLContent(CullMode);
-	_cullBothFaces[isDynamic ? StateScope::Dynamic : StateScope::Static] = (cullMode == VK_CULL_MODE_FRONT_AND_BACK);
+	getContent(_cullBothFaces, isDynamic) = (cullMode == VK_CULL_MODE_FRONT_AND_BACK);
 }
 
 void MVKRenderingCommandEncoderState::setFrontFace(VkFrontFace frontFace, bool isDynamic) {
@@ -313,6 +313,7 @@ void MVKRenderingCommandEncoderState::setFrontFace(VkFrontFace frontFace, bool i
 void MVKRenderingCommandEncoderState::setPolygonMode(VkPolygonMode polygonMode, bool isDynamic) {
 	auto mtlPolygonMode = mvkMTLTriangleFillModeFromVkPolygonMode(polygonMode);
 	setMTLContent(PolygonMode);
+	getContent(_isPolygonModePoint, isDynamic) = (polygonMode == VK_POLYGON_MODE_POINT);
 }
 
 void MVKRenderingCommandEncoderState::setBlendConstants(float blendConstants[4], bool isDynamic) {
@@ -420,8 +421,20 @@ void MVKRenderingCommandEncoderState::setPrimitiveTopology(VkPrimitiveTopology t
 	getContent(_mtlPrimitiveTopology, isDynamic) = mvkMTLPrimitiveTypeFromVkPrimitiveTopology(topology);
 }
 
+// Metal does not support VK_POLYGON_MODE_POINT, but it can be emulated if the polygon mode
+// is static, which allows both the topology and the pipeline topology-class to be set to points.
+// This cannot be accomplished if the dynamic polygon mode has been changed to points when the
+// pipeline is expecting triangles or lines, because the pipeline topology class will be incorrect.
 MTLPrimitiveType MVKRenderingCommandEncoderState::getPrimitiveType() {
-	return getMTLContent(PrimitiveTopology);
+	if (isDynamicState(PolygonMode) &&
+		_isPolygonModePoint[StateScope::Dynamic] &&
+		!_isPolygonModePoint[StateScope::Static]) {
+		
+		reportWarning(VK_ERROR_FEATURE_NOT_PRESENT, "vkCmdSetPolygonMode(): Metal does not support setting VK_POLYGON_MODE_POINT dynamically.");
+		return getMTLContent(PrimitiveTopology);
+	}
+
+	return getContent(_isPolygonModePoint, PolygonMode) ? MTLPrimitiveTypePoint : getMTLContent(PrimitiveTopology);
 }
 
 bool MVKRenderingCommandEncoderState::isDrawingTriangles() {

MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm

@@ -762,6 +762,11 @@ void MVKPhysicalDevice::getProperties(VkPhysicalDeviceProperties2* properties) {
 				portabilityProps->minVertexInputBindingStrideAlignment = (uint32_t)_metalFeatures.vertexStrideAlignment;
 				break;
 			}
+			case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTENDED_DYNAMIC_STATE_3_PROPERTIES_EXT: {
+				auto* extDynState3Props = (VkPhysicalDeviceExtendedDynamicState3PropertiesEXT*)next;
+				extDynState3Props->dynamicPrimitiveTopologyUnrestricted = false;
+				break;
+			}
 			case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_MEMORY_HOST_PROPERTIES_EXT: {
 				auto* extMemHostProps = (VkPhysicalDeviceExternalMemoryHostPropertiesEXT*)next;
 				extMemHostProps->minImportedHostPointerAlignment = _metalFeatures.hostMemoryPageSize;

MoltenVK/MoltenVK/GPUObjects/MVKPipeline.mm

@@ -511,11 +511,12 @@ MVKGraphicsPipeline::MVKGraphicsPipeline(MVKDevice* device,
 	}
 
 	// Topology
-	_vkPrimitiveTopology = (pCreateInfo->pInputAssemblyState && !isRenderingPoints(pCreateInfo)
-				   ? pCreateInfo->pInputAssemblyState->topology
-				   : VK_PRIMITIVE_TOPOLOGY_POINT_LIST);
-
-	_primitiveRestartEnable = pCreateInfo->pInputAssemblyState ? pCreateInfo->pInputAssemblyState->primitiveRestartEnable : true;
+	_vkPrimitiveTopology = VK_PRIMITIVE_TOPOLOGY_POINT_LIST;
+	_primitiveRestartEnable = true;			// Always enabled in Metal
+	if (pCreateInfo->pInputAssemblyState) {
+		_vkPrimitiveTopology = pCreateInfo->pInputAssemblyState->topology;
+		_primitiveRestartEnable = pCreateInfo->pInputAssemblyState->primitiveRestartEnable;
+	}
 
 	// Rasterization
 	_hasRasterInfo = mvkSetOrClear(&_rasterInfo, pCreateInfo->pRasterizationState);
@@ -1933,11 +1934,16 @@ void MVKGraphicsPipeline::addPrevStageOutputToShaderConversionConfig(SPIRVToMSLC
     }
 }
 
-// We render points if either the static topology or static polygon fill mode dictate it
+// We render points if either the static topology or static polygon-mode dictate it.
+// The topology class must be the same between static and dynamic, so point topology
+// in static also implies point topology in dynamic.
+// Metal does not support VK_POLYGON_MODE_POINT, but it can be emulated if the polygon mode
+// is static, which allows both the topology and the pipeline topology-class to be set to points.
+// This cannot be accomplished if the dynamic polygon mode has been changed to points when the
+// pipeline is expecting triangles or lines, because the pipeline topology class will be incorrect.
 bool MVKGraphicsPipeline::isRenderingPoints(const VkGraphicsPipelineCreateInfo* pCreateInfo) {
-	return ((pCreateInfo->pInputAssemblyState && 
-			 (pCreateInfo->pInputAssemblyState->topology == VK_PRIMITIVE_TOPOLOGY_POINT_LIST) &&
-			 !isDynamicState(PrimitiveTopology)) ||
+	return ((pCreateInfo->pInputAssemblyState &&
+			 (pCreateInfo->pInputAssemblyState->topology == VK_PRIMITIVE_TOPOLOGY_POINT_LIST)) ||
 			(pCreateInfo->pRasterizationState && 
 			 (pCreateInfo->pRasterizationState->polygonMode == VK_POLYGON_MODE_POINT) &&
 			 !isDynamicState(PolygonMode)));

MoltenVK/MoltenVK/Vulkan/mvk_datatypes.mm

@@ -509,8 +509,8 @@ MTLTriangleFillMode mvkMTLTriangleFillModeFromVkPolygonModeInObj(VkPolygonMode v
 		case VK_POLYGON_MODE_FILL:
 			return MTLTriangleFillModeFill;
 
+		// Metal does not support VK_POLYGON_MODE_POINT. Next best option is lines.
 		case VK_POLYGON_MODE_POINT:
-			MVKBaseObject::reportError(mvkObj, VK_ERROR_FORMAT_NOT_SUPPORTED, "VkPolygonMode value VK_POLYGON_MODE_POINT is not supported for render pipelines.");
 		case VK_POLYGON_MODE_LINE:
 			return MTLTriangleFillModeLines;