////
- Copyright (c) 2024, Mobica Limited
-
- SPDX-License-Identifier: Apache-2.0
-
- Licensed under the Apache License, Version 2.0 the "License";
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
-     http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-
////

// Extended dynamic_state3: Rasterization samples


== Overview

This sample demonstrates one of the functionalities of VK_EXT_extended_dynamic_state3 related to rasterization samples.
The extension can be used to dynamically change sampling without need to swap pipelines.
image:./image/image.png[]

== Enabling the extension

To be able to use this extension in Vulkan API:
`VK_EXT_extended_dynamic_state3` depends on `VK_KHR_get_physical_device_properties2`, which is promoted to Vulkan 1.1. That is, to use this extension, `VK_EXT_extended_dynamic_state3` and either `VK_KHR_get_physical_device_properties2` or Vulkan 1.1 are required.
Additionally this sample uses `VK_KHR_dynamic_rendering` which required Vulkan 1.2.

== Using the extension

To use the extension:
1) `VK_DYNAMIC_STATE_RASTERIZATION_SAMPLES_EXT` must be added to `VkPipelineDynamicStateCreateInfo`.
2) Method `void vkCmdSetRasterizationSamplesEXT(VkCommandBuffer commandBuffer, VkSampleCountFlagBits rasterizationSamples)` should be called with the active command buffer.

== Resources

https://registry.khronos.org/vulkan/specs/latest/man/html/VK_EXT_extended_dynamic_state3.html
https://registry.khronos.org/vulkan/specs/latest/man/html/vkCmdSetRasterizationSamplesEXT.html
