Crafter.Graphics/examples/VulkanShader/main.cpp

#include "../../lib/VulkanInitializers.hpp"
#include <vulkan/vulkan.h>

//required for the camera matrix.
import Crafter.Math;
import Crafter.Event;
import std;
import Crafter.Graphics;
using namespace Crafter;

typedef VulkanShader<"CustomShader.spirv", "main", VK_SHADER_STAGE_MESH_BIT_EXT, 1, {{{VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 0}}}> CustomShaderSpirv;
typedef VulkanShader<"FragmentShaderVertexColor.spirv", "main", VK_SHADER_STAGE_FRAGMENT_BIT, 0, {}> FragmentShader;
typedef VulkanPipeline<CustomShaderSpirv, FragmentShader> Pipeline;


class CustomShader {
    public:
    /*
        Define a buffer holding our color vectors.
    */
    Buffer<Vector<float, 4>> colors;
    /*
        Initialze our buffer as shader visible storage buffer with the size of the colors vector.
    */
    CustomShader(const std::vector<Vector<float, 4>>& colors) : colors(VK_BUFFER_USAGE_STORAGE_BUFFER_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, colors.size()) {
        std::memcpy(this->colors.value, colors.data(), colors.size()*sizeof(Vector<float, 4>));
    }
    void WriteDescriptors(VkDescriptorSet set) {
        /*
            Write the color buffer descriptor to the set.
        */
        VkWriteDescriptorSet write[1] = {
            vks::initializers::writeDescriptorSet(set, VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 0, &colors.descriptor),
        };
        vkUpdateDescriptorSets(VulkanDevice::device, 1, &write[0], 0, nullptr);
    }
};


int main() {
    VulkanDevice::CreateDevice();
    CustomShaderSpirv::CreateShader();
    FragmentShader::CreateShader();
    Pipeline::CreatePipeline();

    WindowWaylandVulkan window("HelloWindow", 1280, 720);

    DescriptorSet<CustomShaderSpirv, FragmentShader> descriptors;
    CustomShader customShader({{1,0,0,1}, {0,1,0,1}, {0,0,1,1}});
    customShader.WriteDescriptors(descriptors.set[0]);

    EventListener<VkCommandBuffer> listener(&window.onDraw, [&descriptors](VkCommandBuffer cmd){
        vkCmdBindDescriptorSets(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, Pipeline::pipelineLayout, 0, 2, &descriptors.set[0], 0, NULL);
        vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, Pipeline::pipeline);
        VulkanDevice::vkCmdDrawMeshTasksEXTProc(cmd, 1, 1, 1);
    });

    window.StartSync();
}