110 lines
No EOL
4.2 KiB
C++
110 lines
No EOL
4.2 KiB
C++
/*
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Crafter®.Graphics
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Copyright (C) 2025 Catcrafts®
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Catcrafts.net
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3.0 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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module;
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#include <iostream>
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#include <algorithm>
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#include <vulkan/vulkan.h>
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#include <fstream>
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#include <cstdint>
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#include <vector>
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#include <array>
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export module Crafter.Graphics:VulkanShader;
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import :VulkanDevice;
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namespace Crafter {
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export template<size_t N>
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struct StringLiteral {
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constexpr StringLiteral(const char (&str)[N]) {
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std::copy_n(str, N, value);
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}
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char value[N];
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};
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export struct DescriptorBinding {
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VkDescriptorType type;
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std::uint32_t slot;
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};
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/**
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* @brief Represents a Vulkan shader module with specified configuration.
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*
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* This class template encapsulates a Vulkan shader, parametrized by the shader's
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* source path, entry point, shader stage, and its descriptor bindings.
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*
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* @tparam path A compile-time string literal specifying the file path to the shader source or binary.
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* @tparam entrypoint A compile-time string literal specifying the entry point function name within the shader.
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* @tparam stage The Vulkan shader stage flag indicating the shader type (e.g., vertex, fragment).
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* @tparam DescriptorCount The number of descriptor bindings used by the shader.
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* @tparam Descriptors An array of descriptor binding configurations used by the shader.
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*
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* This class facilitates compile-time specification of shader resources and metadata,
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* allowing for type-safe shader management and potentially more efficient shader pipeline creation.
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* CreateShader must be called before using this shader in a pipeline.
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*/
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export template <
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StringLiteral path,
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StringLiteral entrypoint,
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VkShaderStageFlagBits stage,
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std::uint32_t DescriptorCount,
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const std::array<DescriptorBinding, DescriptorCount> Descriptors
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>
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class VulkanShader {
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public:
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constexpr static VkShaderStageFlagBits _stage = stage;
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constexpr static std::array<DescriptorBinding, DescriptorCount> descriptors = Descriptors;
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constexpr static std::uint32_t descriptorCount = DescriptorCount;
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constexpr static StringLiteral _entrypoint = entrypoint;
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inline static VkShaderModule shader;
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/**
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* @brief Creates the vulkan shader, this must be called before any use of this shader.
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*/
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static void CreateShader() {
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std::ifstream file(path.value, std::ios::binary);
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if (!file) {
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std::cerr << "Error: Could not open file " << path.value << std::endl;
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}
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// Move to the end of the file to determine its size
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file.seekg(0, std::ios::end);
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std::streamsize size = file.tellg();
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file.seekg(0, std::ios::beg);
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std::vector<std::uint32_t> spirv(size / sizeof(std::uint32_t));
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// Read the data into the vector
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if (!file.read(reinterpret_cast<char*>(spirv.data()), size)) {
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std::cerr << "Error: Could not read data from file" << std::endl;
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}
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file.close();
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VkShaderModuleCreateInfo module_info{VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO};
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module_info.codeSize = spirv.size() * sizeof(uint32_t);
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module_info.pCode = spirv.data();
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VkShaderModule shader_module;
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VulkanDevice::CHECK_VK_RESULT(vkCreateShaderModule(VulkanDevice::device, &module_info, nullptr, &shader));
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}
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};
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} |