picture_indexed.h

[詳解]

/*
 * Copyright 2001-2021 oZ/acy (名賀月晃嗣)
 * Redistribution and use in source and binary forms, 
 *     with or without modification, 
 *   are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
#ifndef INCLUDE_GUARD_EUNOMIA_PICTURE_INDEXED_H
#define INCLUDE_GUARD_EUNOMIA_PICTURE_INDEXED_H
 
#include <memory>
#include "imagebuffer.h"
#include "colour.h"
 
 
namespace eunomia
{
  class Picture;
  class PictureRgba;
 
class PictureIndexed : public ImageBuffer<std::uint8_t>
{
private:
  std::unique_ptr<std::uint8_t[]> upbuf_;
 
protected:
  RgbColour pal_[256]; 
 
  PictureIndexed(unsigned w, unsigned h);
 
public:
  static
  std::unique_ptr<PictureIndexed> create(unsigned w, unsigned h) noexcept;
 
  std::unique_ptr<PictureIndexed> clone() const noexcept;
 
  std::unique_ptr<Picture> duplicatePicture() const noexcept;
 
 
 
  eunomia::RgbColour& palette(int id) noexcept { return pal_[id]; }
 
  const eunomia::RgbColour& palette(int id) const noexcept { return pal_[id]; }
 
  eunomia::RgbColour* paletteBuffer() noexcept { return pal_; }
 
  const eunomia::RgbColour* paletteBuffer() const noexcept { return pal_; }
};
 
 
class NormalBrendCopierFromPictureIndexed
{
private:
  const PictureIndexed& pi_;
 
public:
  explicit
  NormalBrendCopierFromPictureIndexed(const PictureIndexed& p) noexcept
    : pi_(p)
    {}
 
  void operator()(std::uint8_t src, RgbColour& dst) const noexcept
  {
    dst = pi_.palette(src);
  }
 
  void operator()(std::uint8_t src, RgbaColour& dst) const noexcept
  {
    dst.red = pi_.palette(src).red;
    dst.green = pi_.palette(src).green;
    dst.blue = pi_.palette(src).blue;
  }
};
 
 
 
 
}// end of namespace eunomia
 
 
#endif // INCLUDE_GUARD_EUNOMIA_PICTURE_INDEXED_H