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new structure

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Jorijn van der Graaf 2025-11-16 15:32:11 +01:00
commit 1155e67d63
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src/module/Crafter.Graphics-VulkanShader.cppm
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/*
Crafter®.Graphics
Copyright (C) 2025 Catcrafts®
Catcrafts.net
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3.0 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
module;
#include <iostream>
#include <algorithm>
#include <vulkan/vulkan.h>
#include <fstream>
#include <cstdint>
#include <vector>
#include <array>
export module Crafter.Graphics:VulkanShader;
import :VulkanDevice;
namespace Crafter {
export template<size_t N>
struct StringLiteral {
constexpr StringLiteral(const char (&str)[N]) {
std::copy_n(str, N, value);
}
char value[N];
};
export struct DescriptorBinding {
VkDescriptorType type;
std::uint32_t slot;
};
/**
* @brief Represents a Vulkan shader module with specified configuration.
*
* This class template encapsulates a Vulkan shader, parametrized by the shader's
* source path, entry point, shader stage, and its descriptor bindings.
*
* @tparam path A compile-time string literal specifying the file path to the shader source or binary.
* @tparam entrypoint A compile-time string literal specifying the entry point function name within the shader.
* @tparam stage The Vulkan shader stage flag indicating the shader type (e.g., vertex, fragment).
* @tparam DescriptorCount The number of descriptor bindings used by the shader.
* @tparam Descriptors An array of descriptor binding configurations used by the shader.
*
* This class facilitates compile-time specification of shader resources and metadata,
* allowing for type-safe shader management and potentially more efficient shader pipeline creation.
* CreateShader must be called before using this shader in a pipeline.
*/
export template <
StringLiteral path,
StringLiteral entrypoint,
VkShaderStageFlagBits stage,
std::uint32_t DescriptorCount,
const std::array<DescriptorBinding, DescriptorCount> Descriptors
>
class VulkanShader {
public:
constexpr static VkShaderStageFlagBits _stage = stage;
constexpr static std::array<DescriptorBinding, DescriptorCount> descriptors = Descriptors;
constexpr static std::uint32_t descriptorCount = DescriptorCount;
constexpr static StringLiteral _entrypoint = entrypoint;
inline static VkShaderModule shader;
/**
* @brief Creates the vulkan shader, this must be called before any use of this shader.
*/
static void CreateShader() {
std::ifstream file(path.value, std::ios::binary);
if (!file) {
std::cerr << "Error: Could not open file " << path.value << std::endl;
}
// Move to the end of the file to determine its size
file.seekg(0, std::ios::end);
std::streamsize size = file.tellg();
file.seekg(0, std::ios::beg);
std::vector<std::uint32_t> spirv(size / sizeof(std::uint32_t));
// Read the data into the vector
if (!file.read(reinterpret_cast<char*>(spirv.data()), size)) {
std::cerr << "Error: Could not read data from file" << std::endl;
}
file.close();
VkShaderModuleCreateInfo module_info{VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO};
module_info.codeSize = spirv.size() * sizeof(uint32_t);
module_info.pCode = spirv.data();
VkShaderModule shader_module;
VulkanDevice::CHECK_VK_RESULT(vkCreateShaderModule(VulkanDevice::device, &module_info, nullptr, &shader));
}
};
}