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- /*
- * Copyright (C) 2023 Christopher J. Howard
- *
- * This file is part of Antkeeper source code.
- *
- * Antkeeper source code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Antkeeper source code 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #ifndef ANTKEEPER_GL_TEXTURE_CUBE_HPP
- #define ANTKEEPER_GL_TEXTURE_CUBE_HPP
-
- #include <engine/gl/texture.hpp>
- #include <engine/gl/cube-map-layout.hpp>
-
- namespace gl {
-
- /**
- * A cube texture which can be uploaded to shaders via shader inputs.
- */
- class texture_cube: public texture
- {
- public:
- /**
- * Infers the layout of a cube map from its aspect ratio.
- *
- * @param w Width of the cube map, in pixels.
- * @param h Height of the cube map, in pixels.
- *
- * @return Inferred cube map layout.
- */
- [[nodiscard]] static cube_map_layout infer_cube_map_layout(std::uint16_t w, std::uint16_t h) noexcept;
-
- /**
- * Infers the edge length of a cube map face from its layout and resolution.
- *
- * @param layout Layout of the cube map.
- * @param w Width of the cube map, in pixels.
- * @param h Height of the cube map, in pixels.
- *
- * @return Edge length of the cube map faces, in pixels.
- */
- [[nodiscard]] static std::uint16_t infer_cube_map_face_size(cube_map_layout layout, std::uint16_t w, std::uint16_t h) noexcept;
-
- /// Constructs a cube texture.
- texture_cube(std::uint16_t width, std::uint16_t height, gl::pixel_type type = gl::pixel_type::uint_8, gl::pixel_format format = gl::pixel_format::rgba, gl::transfer_function transfer_function = gl::transfer_function::linear, const std::byte* data = nullptr);
-
- [[nodiscard]] inline constexpr texture_type get_texture_type() const noexcept override
- {
- return texture_type::cube;
- }
-
- /// @copydoc texture::resize(std::uint16_t, std::uint16_t, gl::pixel_type, gl::pixel_format, gl::transfer_function, const std::byte*)
- void resize(std::uint16_t width, std::uint16_t height, gl::pixel_type type, gl::pixel_format format, gl::transfer_function transfer_function, const std::byte* data) override;
-
- /**
- * Resizes the texture.
- *
- * @param width Texture width, in pixels.
- * @param height Texture height, in pixels.
- * @param data Pointer to pixel data.
- */
- void resize(std::uint16_t width, std::uint16_t height, const std::byte* data);
-
- /// @copydoc texture::set_wrapping(gl::texture_wrapping, gl::texture_wrapping, gl::texture_wrapping)
- virtual void set_wrapping(gl::texture_wrapping wrap_s, texture_wrapping wrap_t, texture_wrapping wrap_r);
-
- /// Returns the edge length of the cube texture faces, in pixels.
- [[nodiscard]] inline std::uint16_t get_face_size() const noexcept
- {
- return m_face_size;
- }
-
- private:
- void resized();
-
- std::uint16_t m_face_size{};
- };
-
- } // namespace gl
-
- #endif // ANTKEEPER_GL_TEXTURE_CUBE_HPP
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