Dynamic state3 multisample rasterization

framework/api_vulkan_sample.h

@@ -430,11 +430,11 @@ class ApiVulkanSample : public vkb::VulkanSample<vkb::BindingType::C>
 	std::string title = "Vulkan Example";
 	std::string name  = "vulkanExample";
 
-	struct
+	struct ImageData
 	{
-		VkImage        image;
-		VkDeviceMemory mem;
-		VkImageView    view;
+		VkImage        image{VK_NULL_HANDLE};
+		VkDeviceMemory mem{VK_NULL_HANDLE};
+		VkImageView    view{VK_NULL_HANDLE};
 	} depth_stencil;
 
 	struct

framework/gui.cpp

@@ -652,6 +652,11 @@ void Gui::draw(CommandBuffer &command_buffer)
 }
 
 void Gui::draw(VkCommandBuffer command_buffer)
+{
+	draw(command_buffer, pipeline, pipeline_layout->get_handle(), descriptor_set);
+}
+
+void Gui::draw(VkCommandBuffer command_buffer, const VkPipeline pipeline, const VkPipelineLayout pipeline_layout, const VkDescriptorSet descriptor_set)
 {
 	if (!visible)
 	{
@@ -669,13 +674,13 @@ void Gui::draw(VkCommandBuffer command_buffer)
 	}
 
 	vkCmdBindPipeline(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
-	vkCmdBindDescriptorSets(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline_layout->get_handle(), 0, 1, &descriptor_set, 0, NULL);
+	vkCmdBindDescriptorSets(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline_layout, 0, 1, &descriptor_set, 0, NULL);
 
 	// Push constants
 	auto push_transform = glm::mat4(1.0f);
 	push_transform      = glm::translate(push_transform, glm::vec3(-1.0f, -1.0f, 0.0f));
 	push_transform      = glm::scale(push_transform, glm::vec3(2.0f / io.DisplaySize.x, 2.0f / io.DisplaySize.y, 0.0f));
-	vkCmdPushConstants(command_buffer, pipeline_layout->get_handle(), VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(glm::mat4), &push_transform);
+	vkCmdPushConstants(command_buffer, pipeline_layout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(glm::mat4), &push_transform);
 
 	VkDeviceSize offsets[1] = {0};
 
@@ -729,6 +734,16 @@ Drawer &Gui::get_drawer()
 	return drawer;
 }
 
+VkSampler Gui::get_sampler() const
+{
+	return sampler->get_handle();
+}
+
+VkImageView Gui::get_font_image_view() const
+{
+	return font_image_view->get_handle();
+}
+
 Font &Gui::get_font(const std::string &font_name)
 {
 	assert(!fonts.empty() && "No fonts exist");

framework/gui.h

@@ -190,6 +190,15 @@ class Gui
 	 */
 	void draw(VkCommandBuffer command_buffer);
 
+	/**
+	 * @brief Draws the Gui using an external pipeline
+	 * @param command_buffer Command buffer to register draw-commands
+	 * @param pipeline Pipeline to bind to perform draw-commands
+	 * @param pipeline_layout PipelineLayout for given pieline
+	 * @param descriptor_set DescriptorSet to bind to perform draw-commands
+	 */
+	void draw(VkCommandBuffer command_buffer, const VkPipeline pipeline, const VkPipelineLayout pipeline_layout, const VkDescriptorSet descriptor_set);
+
 	/**
 	 * @brief Shows an overlay top window with app info and maybe stats
 	 * @param app_name Application name
@@ -248,6 +257,10 @@ class Gui
 
 	void set_subpass(const uint32_t subpass);
 
+	VkSampler get_sampler() const;
+
+	VkImageView get_font_image_view() const;
+
   private:
 	/**
 	 * @brief Block size of a buffer pool in kilobytes

samples/CMakeLists.txt

@@ -89,6 +89,7 @@ set(ORDER_LIST
     "fragment_shader_barycentric"
     "gshader_to_mshader"
     "color_write_enable"
+    "dynamic_multisample_rasterization"
     "sparse_image"
     "dynamic_primitive_clipping"
 

samples/extensions/README.adoc

@@ -272,4 +272,10 @@ Demonstrates how to use https://en.wikipedia.org/wiki/Printf[Printf] statements
 
 *Extension:* https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VK_EXT_extended_dynamic_state3.html[`VK_EXT_extended_dynamic_state3`]
 
-Rendering using primitive clipping and depth clipping configured by dynamic pipeline state.
+Rendering using primitive clipping and depth clipping configured by dynamic pipeline state.
+
+=== xref:./{extension_samplespath}dynamic_multisample_rasterization/README.adoc[Dynamic multisample rasterization]
+
+*Extensions:* https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VK_EXT_extended_dynamic_state3.html[`VK_EXT_line_rasterization`], https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VK_EXT_extended_dynamic_state3.html[`VK_EXT_extended_dynamic_state3`]
+
+Demonstrate how to use dynamic multisample rasterization (MSAA)

samples/extensions/dynamic_multisample_rasterization/CMakeLists.txt

@@ -0,0 +1,30 @@
+# 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.
+#
+
+get_filename_component(FOLDER_NAME ${CMAKE_CURRENT_LIST_DIR} NAME)
+get_filename_component(PARENT_DIR ${CMAKE_CURRENT_LIST_DIR} PATH)
+get_filename_component(CATEGORY_NAME ${PARENT_DIR} NAME)
+
+add_sample(
+    ID ${FOLDER_NAME}
+    CATEGORY ${CATEGORY_NAME}
+    AUTHOR "Mobica"
+    NAME "Extended Dynamic State3 Multisample Rasterization"
+    DESCRIPTION "Sample description"
+    SHADER_FILES_GLSL
+        "dynamic_multisample_rasterization/model.vert"
+        "dynamic_multisample_rasterization/model.frag")

samples/extensions/dynamic_multisample_rasterization/README.adoc

@@ -0,0 +1,43 @@
+////
+- 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.
+
+== 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/1.3-extensions/man/html/VK_EXT_extended_dynamic_state3.html
+https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/vkCmdSetRasterizationSamplesEXT.html