129 lines
3.4 KiB
C++
129 lines
3.4 KiB
C++
/* Copyright (c) 2019-2024, Sascha Willems
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 the "License";
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Conservative rasterization
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*
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* Note: Requires a device that supports the VK_EXT_conservative_rasterization extension
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*
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* Uses an offscreen buffer with lower resolution to demonstrate the effect of conservative rasterization
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*/
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#pragma once
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#include "api_vulkan_sample.h"
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#define FB_COLOR_FORMAT VK_FORMAT_R8G8B8A8_UNORM
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#define ZOOM_FACTOR 16
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class ConservativeRasterization : public ApiVulkanSample
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{
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public:
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// Fetch and store conservative rasterization state props for display purposes
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VkPhysicalDeviceConservativeRasterizationPropertiesEXT conservative_raster_properties{};
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bool conservative_raster_enabled = true;
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struct Vertex
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{
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float position[3];
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float color[3];
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};
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struct Triangle
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{
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std::unique_ptr<vkb::core::BufferC> vertices;
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std::unique_ptr<vkb::core::BufferC> indices;
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uint32_t index_count;
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} triangle;
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std::unique_ptr<vkb::core::BufferC> uniform_buffer;
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struct UniformBuffers
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{
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std::unique_ptr<vkb::core::BufferC> scene;
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} uniform_buffers;
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struct UboScene
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{
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glm::mat4 projection;
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glm::mat4 model;
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} ubo_scene;
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struct PipelineLayouts
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{
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VkPipelineLayout scene;
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VkPipelineLayout fullscreen;
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} pipeline_layouts;
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struct Pipelines
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{
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VkPipeline triangle;
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VkPipeline triangle_conservative_raster;
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VkPipeline triangle_overlay;
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VkPipeline fullscreen;
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} pipelines;
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struct DescriptorSetLayouts
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{
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VkDescriptorSetLayout scene;
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VkDescriptorSetLayout fullscreen;
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} descriptor_set_layouts;
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struct DescriptorSets
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{
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VkDescriptorSet scene;
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VkDescriptorSet fullscreen;
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} descriptor_sets;
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// Framebuffer for offscreen rendering
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struct FrameBufferAttachment
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{
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VkImage image;
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VkDeviceMemory mem;
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VkImageView view;
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};
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struct OffscreenPass
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{
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int32_t width, height;
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VkFramebuffer framebuffer;
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FrameBufferAttachment color, depth;
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VkRenderPass render_pass;
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VkSampler sampler;
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VkDescriptorImageInfo descriptor;
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} offscreen_pass;
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ConservativeRasterization();
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~ConservativeRasterization();
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virtual void request_gpu_features(vkb::PhysicalDevice &gpu) override;
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void build_command_buffers() override;
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void prepare_offscreen();
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void load_assets();
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void setup_descriptor_pool();
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void setup_descriptor_set_layout();
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void setup_descriptor_set();
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void prepare_pipelines();
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void prepare_uniform_buffers();
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void update_uniform_buffers_scene();
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void draw();
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bool prepare(const vkb::ApplicationOptions &options) override;
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virtual void render(float delta_time) override;
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virtual void on_update_ui_overlay(vkb::Drawer &drawer) override;
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};
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std::unique_ptr<vkb::VulkanSampleC> create_conservative_rasterization();
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