layers: Add alphaToOne device feature validation

Change-Id: I1633cf7a8a5ebeed797cdb5373e5eb2533ce6887

2 files changed, 10 insertions, 1 deletions

diff --git a/layers/core_validation.cpp b/layers/core_validation.cpp
index 5c8b7948..e5765aa5 100644
--- a/layers/core_validation.cpp
+++ b/layers/core_validation.cpp
@@ -3253,6 +3253,15 @@ static bool verifyPipelineCreateState(layer_data *dev_data, std::vector<PIPELINE
         if (pPipeline->graphicsPipelineCI.pRasterizationState->rasterizerDiscardEnable == VK_FALSE) {
             auto subpass_desc = renderPass ? &renderPass->createInfo.pSubpasses[pPipeline->graphicsPipelineCI.subpass] : nullptr;
 
+            if ((pPipeline->graphicsPipelineCI.pMultisampleState->alphaToOneEnable == VK_TRUE) &&
+                (!dev_data->enabled_features.alphaToOne)) {
+                skip_call |= log_msg(dev_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT,
+                                     0, __LINE__, VALIDATION_ERROR_01464, "DS",
+                                     "vkCreateGraphicsPipelines(): the alphaToOne device feature is disabled: the alphaToOneEnable "
+                                     "member of the VkPipelineMultisampleStateCreateInfo structure must be set to VK_FALSE.",
+                                     validation_error_map[VALIDATION_ERROR_01464]);
+            }
+
             // If subpass uses a depth/stencil attachment, pDepthStencilState must be a pointer to a valid structure
             if (subpass_desc && subpass_desc->pDepthStencilAttachment &&
                 subpass_desc->pDepthStencilAttachment->attachment != VK_ATTACHMENT_UNUSED) {
diff --git a/layers/vk_validation_error_database.txt b/layers/vk_validation_error_database.txt
index dfab0dfd..f9bb9c52 100644
--- a/layers/vk_validation_error_database.txt
+++ b/layers/vk_validation_error_database.txt
@@ -1449,7 +1449,7 @@ VALIDATION_ERROR_01460~^~N~^~Unknown~^~vkCmdSetViewport~^~For more information r
 VALIDATION_ERROR_01461~^~N~^~Unknown~^~vkCmdSetViewport~^~For more information refer to Vulkan Spec Section '24. Rasterization' which states 'cullMode must be a valid combination of VkCullModeFlagBits values' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#VkPipelineRasterizationStateCreateInfo)~^~implicit
 VALIDATION_ERROR_01462~^~N~^~Unknown~^~vkCmdSetViewport~^~For more information refer to Vulkan Spec Section '24. Rasterization' which states 'frontFace must be a valid VkFrontFace value' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#VkPipelineRasterizationStateCreateInfo)~^~implicit
 VALIDATION_ERROR_01463~^~N~^~Unknown~^~vkCmdSetViewport~^~For more information refer to Vulkan Spec Section '24. Rasterization' which states 'If the sample rate shading feature is not enabled, sampleShadingEnable must be VK_FALSE' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#VkPipelineMultisampleStateCreateInfo)~^~
-VALIDATION_ERROR_01464~^~N~^~Unknown~^~vkCmdSetViewport~^~For more information refer to Vulkan Spec Section '24. Rasterization' which states 'If the alpha to one feature is not enabled, alphaToOneEnable must be VK_FALSE' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#VkPipelineMultisampleStateCreateInfo)~^~
+VALIDATION_ERROR_01464~^~Y~^~None~^~vkCmdSetViewport~^~For more information refer to Vulkan Spec Section '24. Rasterization' which states 'If the alpha to one feature is not enabled, alphaToOneEnable must be VK_FALSE' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#VkPipelineMultisampleStateCreateInfo)~^~
 VALIDATION_ERROR_01465~^~N~^~Unknown~^~vkCmdSetViewport~^~For more information refer to Vulkan Spec Section '24. Rasterization' which states 'minSampleShading must be in the range [0,1]' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#VkPipelineMultisampleStateCreateInfo)~^~
 VALIDATION_ERROR_01466~^~N~^~Unknown~^~vkCmdSetViewport~^~For more information refer to Vulkan Spec Section '24. Rasterization' which states 'sType must be VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#VkPipelineMultisampleStateCreateInfo)~^~implicit, TBD in parameter validation layer.
 VALIDATION_ERROR_01467~^~N~^~Unknown~^~vkCmdSetViewport~^~For more information refer to Vulkan Spec Section '24. Rasterization' which states 'pNext must be NULL' (https://www.khronos.org/registry/vulkan/specs/1.0-extensions/xhtml/vkspec.html#VkPipelineMultisampleStateCreateInfo)~^~implicit, TBD in parameter validation layer.