💿🐜 Antkeeper source code
https://antkeeper.com
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88 lines
2.6 KiB
88 lines
2.6 KiB
/*
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* Copyright (C) 2021 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ANTKEEPER_GL_VERTEX_ARRAY_HPP
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#define ANTKEEPER_GL_VERTEX_ARRAY_HPP
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#include <cstdint>
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#include <unordered_map>
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#include "gl/vertex-attribute.hpp"
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namespace gl {
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class rasterizer;
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class vertex_buffer;
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/**
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* Vertex array object (VAO), which describes how vertex attributes are stored in vertex buffer objects (VBOs).
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*
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* @see gl::vertex_attribute
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* @see gl::vertex_buffer
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*/
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class vertex_array
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{
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public:
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/// Vertex attribute binding location type.
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typedef std::uint_fast32_t attribute_location_type;
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/// Maps vertex attribute to binding locations.
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typedef std::unordered_map<attribute_location_type, vertex_attribute> attribute_map_type;
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/// Constructs a vertex array.
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vertex_array();
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/// Destructs a vertex array.
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~vertex_array();
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vertex_array(const vertex_array&) = delete;
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vertex_array& operator=(const vertex_array&) = delete;
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/**
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* Binds a vertex attribute to the vertex array.
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*
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* @param location Location to which the vertex attribute should be bound.
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* @param attribute Vertex attribute to bind.
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*
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* @except std::invalid_argument Cannot bind vertex attribute that has a null vertex buffer.
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* @except std::invalid_argument Cannot bind vertex attribute that has an unsupported number of components.
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*/
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void bind(attribute_location_type location, const vertex_attribute& attribute);
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/**
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* Unbinds a vertex attribute from the vertex array.
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*
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* @param location Location of the vertex attribute to unbind.
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*
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* @except std::invalid_argument Non-existent vertex attribute cannot be unbound.
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*/
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void unbind(attribute_location_type location);
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/// Returns a const reference to the map of vertex attributes bound to this vertex array.
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const attribute_map_type& get_attributes() const;
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private:
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friend class rasterizer;
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attribute_map_type attributes;
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std::uint_fast32_t gl_array_id;
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};
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} // namespace gl
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#endif // ANTKEEPER_GL_VERTEX_ARRAY_HPP
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