pipeline_alpha_vertex.hpp

// Copyright Take Vos 2022.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "../vector_span.hpp"
#include "../geometry/axis_aligned_rectangle.hpp"
#include "../rapid/sfloat_rgba16.hpp"
#include "../rapid/sfloat_rgba32.hpp"
#include "../rapid/sfloat_rgb32.hpp"
#include "../rapid/int_abgr8_pack.hpp"
#include <vulkan/vulkan.hpp>
#include <span>
 
namespace hi::inline v1::pipeline_alpha {
 
struct alignas(16) vertex {
    sfloat_rgba32 position;
 
    sfloat_rgba32 clipping_rectangle;
 
    float alpha;
 
    vertex(sfloat_rgba32 position, sfloat_rgba32 clipping_rectangle, float alpha) noexcept :
        position(position), clipping_rectangle(clipping_rectangle), alpha(alpha)
    {
    }
 
    static vk::VertexInputBindingDescription inputBindingDescription()
    {
        return {0, sizeof(vertex), vk::VertexInputRate::eVertex};
    }
 
    static std::vector<vk::VertexInputAttributeDescription> inputAttributeDescriptions()
    {
        return {
            {0, 0, vk::Format::eR32G32B32A32Sfloat, offsetof(vertex, position)},
            {1, 0, vk::Format::eR32G32B32A32Sfloat, offsetof(vertex, clipping_rectangle)},
            {2, 0, vk::Format::eR32Sfloat, offsetof(vertex, alpha)},
        };
    }
};
 
} // namespace hi::inline v1::pipeline_alpha