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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_IMAGE_VIEW_HPP
- #define ANTKEEPER_GL_IMAGE_VIEW_HPP
-
- #include <engine/gl/image.hpp>
- #include <engine/gl/image-view-flag.hpp>
- #include <cstdint>
- #include <memory>
-
- namespace gl {
-
- /**
- * Image view.
- */
- class image_view
- {
- public:
- /// Destructs an image view.
- virtual ~image_view() = 0;
-
- image_view(const image_view&) = delete;
- image_view(image_view&&) = delete;
- image_view& operator=(const image_view&) = delete;
- image_view& operator=(image_view&&) = delete;
-
- /// Returns the image on which the view was created.
- [[nodiscard]] inline constexpr const std::shared_ptr<image>& get_image() const noexcept
- {
- return m_image;
- }
-
- /// Returns the format and type used to interpret texel blocks of the image.
- [[nodiscard]] inline constexpr format get_format() const noexcept
- {
- return m_format;
- }
-
- /// Returns the first mipmap level accessible to the view.
- [[nodiscard]] inline constexpr std::uint32_t get_first_mip_level() const noexcept
- {
- return m_first_mip_level;
- }
-
- /// Returns the number of mipmap levels accessible to the view.
- [[nodiscard]] inline constexpr std::uint32_t get_mip_level_count() const noexcept
- {
- return m_mip_level_count;
- }
-
- /// Returns the first array layer accessible to the view.
- [[nodiscard]] inline constexpr std::uint32_t get_first_array_layer() const noexcept
- {
- return m_first_array_layer;
- }
-
- /// Returns the number of array layers accessible to the view.
- [[nodiscard]] inline constexpr std::uint32_t get_array_layer_count() const noexcept
- {
- return m_array_layer_count;
- }
-
- /// Returns the dimensionality of the image view.
- [[nodiscard]] inline constexpr std::uint8_t get_dimensionality() const noexcept
- {
- return m_dimensionality;
- }
-
- /// Returns `true` if the image view is 1D, `false` otherwise.
- [[nodiscard]] inline constexpr bool is_1d() const noexcept
- {
- return m_dimensionality == 1;
- }
-
- /// Returns `true` if the image view is 2D, `false` otherwise.
- [[nodiscard]] inline constexpr bool is_2d() const noexcept
- {
- return m_dimensionality == 2;
- }
-
- /// Returns `true` if the image view is 3D, `false` otherwise.
- [[nodiscard]] inline constexpr bool is_3d() const noexcept
- {
- return m_dimensionality == 3;
- }
-
- /// Returns `true` if the image view is an array view, `false` otherwise.
- [[nodiscard]] inline constexpr bool is_array() const noexcept
- {
- return m_flags & std::to_underlying(image_view_flag::array);
- }
-
- /// Returns `true` if the image view is a cube map view, `false` otherwise.
- [[nodiscard]] inline constexpr bool is_cube() const noexcept
- {
- return m_flags & std::to_underlying(image_view_flag::cube);
- }
-
- protected:
- /**
- * Constructs an image view from an image.
- *
- * @param image Image on which the view will be created.
- * @param dimensionality Image view dimensionality, on `[1, 3]`.
- * @param format Format and type used to interpret texel blocks of the image. If gl::format::undefined, the format will be set to the format of the image.
- * @param first_mip_level First mipmap level accessible to the view.
- * @param mip_level_count Number of mipmap levels accessible to the view.
- * @param first_array_layer First array layer accessible to the view.
- * @param array_layer Number of array layers accessible to the view.
- * @param flags Image view flags.
- *
- * @except std::invalid_argument Image view has null image.
- * @except std::invalid_argument Image view has unsupported format.
- * @except std::invalid_argument Image view has zero mip levels.
- * @except std::out_of_range Image view mip range out of image mip range.
- * @except std::invalid_argument Image view has zero array layers.
- * @except std::out_of_range Image view array layer range out of image array layer range.
- * @except std::invalid_argument Image view dimensionality must match image dimensionality.
- * @except std::invalid_argument Cube image views must be constructed from cube-compatible images.
- * @except std::invalid_argument Cube image views array layer count must be a multiple of 6.
- */
- image_view
- (
- std::shared_ptr<gl::image> image,
- std::uint8_t dimensionality,
- gl::format format,
- std::uint32_t first_mip_level,
- std::uint32_t mip_level_count,
- std::uint32_t first_array_layer,
- std::uint32_t array_layer_count,
- std::uint8_t flags
- );
-
- private:
- friend class framebuffer;
- friend class gl_shader_texture_1d;
- friend class gl_shader_texture_2d;
- friend class gl_shader_texture_3d;
- friend class gl_shader_texture_cube;
-
- unsigned int m_gl_texture_name{0};
- std::shared_ptr<image> m_image;
- std::uint8_t m_dimensionality{0};
- format m_format{format::undefined};
- std::uint32_t m_first_mip_level{0};
- std::uint32_t m_mip_level_count{0};
- std::uint32_t m_first_array_layer{0};
- std::uint32_t m_array_layer_count{0};
- std::uint8_t m_flags{0};
- };
-
- /**
- * 1D image view.
- */
- class image_view_1d: public image_view
- {
- public:
- /// @copydoc image_view::image_view
- image_view_1d
- (
- std::shared_ptr<gl::image> image,
- gl::format format = gl::format::undefined,
- std::uint32_t first_mip_level = 0,
- std::uint32_t mip_level_count = 1,
- std::uint32_t first_array_layer = 0
- );
- };
-
- /**
- * 1D image array view.
- */
- class image_view_1d_array: public image_view
- {
- public:
- /// @copydoc image_view::image_view
- image_view_1d_array
- (
- std::shared_ptr<gl::image> image,
- gl::format format = gl::format::undefined,
- std::uint32_t first_mip_level = 0,
- std::uint32_t mip_level_count = 1,
- std::uint32_t first_array_layer = 0,
- std::uint32_t array_layer_count = 1
- );
- };
-
- /**
- * 2D image view.
- */
- class image_view_2d: public image_view
- {
- public:
- /// @copydoc image_view::image_view
- image_view_2d
- (
- std::shared_ptr<gl::image> image,
- gl::format format = gl::format::undefined,
- std::uint32_t first_mip_level = 0,
- std::uint32_t mip_level_count = 1,
- std::uint32_t first_array_layer = 0
- );
- };
-
- /**
- * 2D image array view.
- */
- class image_view_2d_array: public image_view
- {
- public:
- /// @copydoc image_view::image_view
- image_view_2d_array
- (
- std::shared_ptr<gl::image> image,
- gl::format format = gl::format::undefined,
- std::uint32_t first_mip_level = 0,
- std::uint32_t mip_level_count = 1,
- std::uint32_t first_array_layer = 0,
- std::uint32_t array_layer_count = 1
- );
- };
-
- /**
- * 3D image view.
- */
- class image_view_3d: public image_view
- {
- public:
- /// @copydoc image_view::image_view
- image_view_3d
- (
- std::shared_ptr<gl::image> image,
- gl::format format = gl::format::undefined,
- std::uint32_t first_mip_level = 0,
- std::uint32_t mip_level_count = 1
- );
- };
-
- /**
- * Cube image view.
- */
- class image_view_cube: public image_view
- {
- public:
- /// @copydoc image_view::image_view
- image_view_cube
- (
- std::shared_ptr<gl::image> image,
- gl::format format = gl::format::undefined,
- std::uint32_t first_mip_level = 0,
- std::uint32_t mip_level_count = 1,
- std::uint32_t first_array_layer = 0
- );
- };
-
- /**
- * Cube image array view.
- */
- class image_view_cube_array: public image_view
- {
- public:
- /// @copydoc image_view::image_view
- image_view_cube_array
- (
- std::shared_ptr<gl::image> image,
- gl::format format = gl::format::undefined,
- std::uint32_t first_mip_level = 0,
- std::uint32_t mip_level_count = 1,
- std::uint32_t first_array_layer = 0,
- std::uint32_t array_layer_count = 6
- );
- };
-
- } // namespace gl
-
- #endif // ANTKEEPER_GL_IMAGE_VIEW_HPP
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