101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
/* Copyright (c) 2021-2024, 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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* Loading a Basis Universal supercompressed texture and transcoding it to a supported GPU texture format
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*/
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#pragma once
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#include <ktx.h>
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#include <vector>
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#include "api_vulkan_sample.h"
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class TextureCompressionBasisu : public ApiVulkanSample
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{
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public:
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// Vertex layout for this example
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struct VertexStructure
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{
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float pos[3];
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float uv[2];
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};
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// Contains all Vulkan objects that are required to store and use a texture
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// Note that this repository contains a texture class (vulkan_texture.h) that encapsulates texture loading functionality in a class that is used in subsequent demos
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struct Texture
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{
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VkSampler sampler;
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VkImage image = VK_NULL_HANDLE;
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VkImageLayout image_layout;
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VkDeviceMemory device_memory;
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VkImageView view;
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uint32_t width, height;
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uint32_t mip_levels;
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} texture;
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std::unique_ptr<vkb::core::BufferC> vertex_buffer;
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std::unique_ptr<vkb::core::BufferC> index_buffer;
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uint32_t index_count;
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std::unique_ptr<vkb::core::BufferC> uniform_buffer_vs;
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struct
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{
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glm::mat4 projection;
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glm::mat4 model;
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} ubo_vs;
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VkPipeline pipeline;
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VkPipelineLayout pipeline_layout;
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VkDescriptorSet descriptor_set;
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VkDescriptorSetLayout descriptor_set_layout;
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int32_t selected_transcode_target_format = 0;
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std::vector<ktx_transcode_fmt_e> available_target_formats;
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std::vector<std::string> available_target_formats_names;
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int32_t selected_input_texture = 0;
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std::vector<std::string> texture_file_names;
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float last_transcode_time;
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TextureCompressionBasisu();
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~TextureCompressionBasisu();
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virtual void request_gpu_features(vkb::PhysicalDevice &gpu) override;
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bool format_supported(VkFormat format);
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void get_available_target_formats();
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void transcode_texture(const std::string &input_file, ktx_transcode_fmt_e target_format);
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void destroy_texture(Texture texture);
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void update_image_descriptor();
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void build_command_buffers() override;
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void draw();
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void generate_quad();
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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();
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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 view_changed() 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::Application> create_texture_compression_basisu();
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