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2025-09-04 10:54:47 +08:00
commit 6bc8f61b18
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+/* Copyright (c) 2020-2024, Sascha Willems
+ *
+ * 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.
+ */
+
+/*
+ * Using variable fragment shading rates from a subpass attachment with VK_KHR_fragment_shading_rate
+ * This sample creates an image that contains different shading rates, which are then sampled during rendering
+ */
+
+#pragma once
+
+#include "api_vulkan_sample.h"
+
+class FragmentShadingRate : public ApiVulkanSample
+{
+  public:
+	bool enable_attachment_shading_rate = true;
+	bool color_shading_rate             = false;
+	bool display_skysphere              = true;
+
+	VkPhysicalDeviceFragmentShadingRatePropertiesKHR physical_device_fragment_shading_rate_properties{};
+	VkPhysicalDeviceFragmentShadingRateFeaturesKHR   enabled_physical_device_fragment_shading_rate_features{};
+
+	struct ShadingRateImage
+	{
+		VkImage        image  = VK_NULL_HANDLE;
+		VkDeviceMemory memory = VK_NULL_HANDLE;
+		VkImageView    view   = VK_NULL_HANDLE;
+	} shading_rate_image;
+
+	struct
+	{
+		Texture skysphere;
+		Texture scene;
+	} textures;
+
+	struct
+	{
+		std::unique_ptr<vkb::sg::SubMesh> skysphere;
+		std::unique_ptr<vkb::sg::SubMesh> scene;
+	} models;
+
+	struct
+	{
+		std::unique_ptr<vkb::core::BufferC> scene;
+	} uniform_buffers;
+
+	struct UBOScene
+	{
+		glm::mat4 projection;
+		glm::mat4 modelview;
+		glm::mat4 skysphere_modelview;
+		int32_t   color_shading_rate;
+	} ubo_scene;
+
+	VkPipelineLayout pipeline_layout;
+	struct Pipelines
+	{
+		VkPipeline skysphere;
+		VkPipeline sphere;
+	} pipelines;
+
+	VkDescriptorSetLayout descriptor_set_layout;
+	VkDescriptorSet       descriptor_set;
+
+	struct
+	{
+		glm::vec4 offset;
+		uint32_t  object_type;
+	} push_const_block;
+
+	FragmentShadingRate();
+	~FragmentShadingRate();
+	virtual void request_gpu_features(vkb::PhysicalDevice &gpu) override;
+	void         create_shading_rate_attachment();
+	void         invalidate_shading_rate_attachment();
+	void         setup_render_pass() override;
+	void         setup_framebuffer() override;
+	void         build_command_buffers() override;
+	void         load_assets();
+	void         setup_descriptor_pool();
+	void         setup_descriptor_set_layout();
+	void         setup_descriptor_sets();
+	void         prepare_pipelines();
+	void         prepare_uniform_buffers();
+	void         update_uniform_buffers();
+	void         draw();
+	bool         prepare(const vkb::ApplicationOptions &options) override;
+	virtual void render(float delta_time) override;
+	virtual void on_update_ui_overlay(vkb::Drawer &drawer) override;
+	virtual bool resize(const uint32_t width, const uint32_t height) override;
+};
+
+std::unique_ptr<vkb::VulkanSampleC> create_fragment_shading_rate();