Texture.h

/*
 * Gamedev Framework (gf)
 * Copyright (C) 2016-2018 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.
 *
 * Part of this file comes from SFML, with the same license:
 * Copyright (C) 2007-2015 Laurent Gomila (laurent@sfml-dev.org)
 */
#ifndef GF_TEXTURE_H
#define GF_TEXTURE_H

#include <cstdint>

#include "Path.h"
#include "Portability.h"
#include "Rect.h"
#include "Vector.h"

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

  class Image;
  class InputStream;

  class GF_API BareTexture {
  public:
    enum class Format {
      Color, 
      Alpha, 
    };

    BareTexture(Format format);

    ~BareTexture();

    BareTexture(const BareTexture&) = delete;

    BareTexture& operator=(const BareTexture&) = delete;

    BareTexture(BareTexture&& other) noexcept;

    BareTexture& operator=(BareTexture&& other) noexcept;

    Format getFormat() const {
      return m_format;
    }

    unsigned getName() const {
      return m_name;
    }

    Vector2u getSize() const {
      return m_size;
    }

    void setSmooth(bool smooth = true);

    bool isSmooth() const noexcept {
      return m_smooth;
    }

    void setRepeated(bool repeated = true);

    bool isRepeated() const noexcept {
      return m_repeated;
    }

    void update(const uint8_t *data);

    void update(const uint8_t *data, const RectU& rect);

    RectF computeTextureCoords(const RectU& rect) const;

    bool generateMipmap();

    static void bind(const BareTexture *texture);

  protected:
    bool create(Vector2u size, const uint8_t *data);

  private:
    Format m_format;
    unsigned m_name;
    Vector2u m_size;
    bool m_smooth;
    bool m_repeated;
    bool m_mipmap;
  };


  class GF_API Texture : public BareTexture {
  public:
    Texture();

    bool create(Vector2u size);

    bool loadFromImage(const Image& image);

    bool loadFromFile(const Path& filename);

    bool loadFromStream(InputStream& stream);

    bool loadFromMemory(const uint8_t *data, std::size_t length);

    void update(const Image& image);

    Image copyToImage() const;

  };


  class GF_API AlphaTexture : public BareTexture {
  public:
    AlphaTexture();

    bool create(Vector2u size);
  };

#ifndef DOXYGEN_SHOULD_SKIP_THIS
}
#endif
}

#endif // GF_TEXTURE_H