glyph_atlas_info.hpp

// Copyright Take Vos 2021.
// 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 "../geometry/point.hpp"
#include "../geometry/extent.hpp"
#include "../geometry/scale.hpp"
#include "../geometry/axis_aligned_rectangle.hpp"
 
namespace hi::inline v1 {
 
class glyph_atlas_info {
public:
    point3 position;
 
    extent2 size;
 
    scale2 border_scale;
 
    aarectangle texture_coordinates;
 
    [[nodiscard]] constexpr bool empty() const noexcept
    {
        return size == extent2{};
    }
 
    [[nodiscard]] constexpr operator bool() const noexcept
    {
        return not empty();
    }
 
    constexpr glyph_atlas_info() noexcept = default;
 
    constexpr glyph_atlas_info(point3 position, extent2 size, scale2 border_scale, scale2 texture_coordinate_scale) noexcept :
        position(position),
        size(size),
        border_scale(border_scale),
        texture_coordinates(bounding_rectangle(texture_coordinate_scale * rectangle{position, size}))
    {
        hi_axiom(position == floor(position));
        hi_axiom(size == ceil(size));
    }
};
 
} // namespace hi::inline v1