VertexBuffer.h

/*
 * Gamedev Framework (gf)
 * Copyright (C) 2016-2021 Julien Bernard
 *
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 *    claim that you wrote the original software. If you use this software
 *    in a product, an acknowledgment in the product documentation would be
 *    appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 */
#ifndef GF_VERTEX_BUFFER_H
#define GF_VERTEX_BUFFER_H

#include <cstddef>
#include <cstdint>

#include "GraphicsApi.h"
#include "GraphicsHandle.h"
#include "PrimitiveType.h"

namespace gf {
#ifndef DOXYGEN_SHOULD_SKIP_THIS
inline namespace v1 {
#endif

  struct Vertex;

  template<>
  struct GF_GRAPHICS_API GraphicsTrait<GraphicsTag::Buffer> {
    static void gen(int n, unsigned* resources);
    static void del(int n, const unsigned* resources);
  };

  class GF_GRAPHICS_API VertexBuffer {
  public:
    VertexBuffer();

    VertexBuffer(const Vertex *vertices, std::size_t count, PrimitiveType type);

    VertexBuffer(const Vertex *vertices, const uint16_t *indices, std::size_t count, PrimitiveType type);

    VertexBuffer(const void *vertices, std::size_t size, std::size_t count, PrimitiveType type);

    VertexBuffer(const void *vertices, std::size_t size, const uint16_t *indices, std::size_t count, PrimitiveType type);

    bool hasArrayBuffer() const {
      return m_vbo.isValid();
    }

    bool hasElementArrayBuffer() const {
      return m_ebo.isValid();
    }

    std::size_t getVertexSize() const {
      return m_size;
    }

    std::size_t getCount() const {
      return m_count;
    }

    PrimitiveType getPrimitiveType() const {
      return m_type;
    }

    static void bind(const VertexBuffer *buffer);

  private:
    GraphicsHandle<GraphicsTag::Buffer> m_vbo;
    GraphicsHandle<GraphicsTag::Buffer> m_ebo;
    std::size_t m_size;
    std::size_t m_count;
    PrimitiveType m_type;
  };

#ifndef DOXYGEN_SHOULD_SKIP_THIS
}
#endif
}

#endif // GF_VERTEX_BUFFER_H