Vk: add missing enums and/or docs for VK_KHR_acceleration_structure.

src/Magnum/Vk/BufferCreateInfo.h

@@ -77,7 +77,24 @@ enum class BufferUsage: UnsignedInt {
     IndirectBuffer = VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT,
 
     /** @todo VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT, 1.2 */
-    /** @todo RT-related usages */
+
+    /**
+     * Suitable for a ray tracing shader binding table
+     * @requires_vk_feature @ref DeviceFeature::RayTracingPipeline
+     */
+    ShaderBindingTable = VK_BUFFER_USAGE_SHADER_BINDING_TABLE_BIT_KHR,
+
+    /**
+     * Suitable as a read-only input to an acceleration structure build
+     * @requires_vk_feature @ref DeviceFeature::AccelerationStructure
+     */
+    AccelerationStructureBuildInputReadOnly = VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_BUILD_INPUT_READ_ONLY_BIT_KHR,
+
+    /**
+     * Suitable for an acceleration structure storage space
+     * @requires_vk_feature @ref DeviceFeature::AccelerationStructure
+     */
+    AccelerationStructureStorage = VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_STORAGE_BIT_KHR
 };
 
 /**

src/Magnum/Vk/Pipeline.h

@@ -132,10 +132,16 @@ enum class PipelineStage: UnsignedInt {
     /** Execution of host read/writes of device memory */
     Host = VK_PIPELINE_STAGE_HOST_BIT,
 
-    /** Execution of commands related to an acceleration structure */
+    /**
+     * Execution of commands related to an acceleration structure
+     * @requires_vk_feature @ref DeviceFeature::AccelerationStructure
+     */
     AccelerationStructureBuild = VK_PIPELINE_STAGE_ACCELERATION_STRUCTURE_BUILD_BIT_KHR,
 
-    /** Execution of ray tracing shaders */
+    /**
+     * Execution of ray tracing shaders
+     * @requires_vk_feature @ref DeviceFeature::RayTracingPipeline
+     */
     RayTracingShader = VK_PIPELINE_STAGE_RAY_TRACING_SHADER_BIT_KHR,
 
     /**
@@ -350,6 +356,7 @@ enum class Access: UnsignedInt {
      * @ref PipelineStage::TessellationEvaluationShader "TessellationEvaluationShader",
      * @ref PipelineStage::ComputeShader "ComputeShader" and
      * @ref PipelineStage::RayTracingShader "RayTracingShader".
+     * @requires_vk_feature @ref DeviceFeature::AccelerationStructure
      */
     AccelerationStructureRead = VK_ACCESS_ACCELERATION_STRUCTURE_READ_BIT_KHR,
 
@@ -358,6 +365,7 @@ enum class Access: UnsignedInt {
      * part of a build or copy command.
      *
      * Valid for @ref PipelineStage::AccelerationStructureBuild.
+     * @requires_vk_feature @ref DeviceFeature::AccelerationStructure
      */
     AccelerationStructureWrite = VK_ACCESS_ACCELERATION_STRUCTURE_WRITE_BIT_KHR
 };