al_Image.hpp

#ifndef INCLUDE_AL_IMAGE_HPP
#define INCLUDE_AL_IMAGE_HPP
 
/*  Allocore --
        Multimedia / virtual environment application class library
 
        Copyright (C) 2009. AlloSphere Research Group, Media Arts & Technology,
   UCSB. Copyright (C) 2012. The Regents of the University of California. All
   rights reserved.
 
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are
   met:
 
   Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
 
   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.
 
   Neither the name of the University of California nor the names
   of its contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.
 
   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.
 
 
   File description:
    Loads and saves images
 
   File author(s):
    Graham Wakefield, 2010, grrrwaaa@gmail.com
    Keehong Youn, 2019, younkeehong@gmail.com
*/
 
#include <cstdint>
#include <string>
#include <vector>
 
namespace al {
 
struct Image {
  struct RGBAPix {
    uint8_t r, g, b, a;
  };
 
  unsigned int mWidth = 0, mHeight = 0;
  std::vector<uint8_t> mArray;
  std::string mFilename = "";
  int mCompression = 50;
  bool mLoaded = false;
 
  Image() = default;
  Image(const Image &) = default;
  Image(Image &&) = default;
  Image &operator=(const Image &) = default;
  Image &operator=(Image &&) = default;
  ~Image() = default;
 
  Image(const std::string &filename);
 
 
  bool load(const std::string &filePath);
 
 
  bool save(const std::string &filePath);
 
  const std::string &filepath() const { return mFilename; }
 
  bool loaded() const { return mLoaded; }
 
  std::vector<uint8_t> &array() { return mArray; }
 
  const std::vector<uint8_t> &array() const { return mArray; }
 
  template <typename T = RGBAPix> T *pixels() { return (T *)(mArray.data()); }
 
  template <typename T = RGBAPix> const T *pixels() const {
    return (const T *)(mArray.data());
  }
 
  static bool saveImage(std::string fileName, unsigned char *pixs, int width,
                        int height, bool flipVertically = false,
                        int numComponents = 3);
 
  // unsigned bytesPerPixel() const { return allo_type_size(array().type()) *
  // array().components(); }
 
  // Format format() const;
 
  unsigned width() const { return mWidth; }
 
  unsigned height() const { return mHeight; }
 
  int compression() const { return mCompression; }
 
 
  Image &compression(int flags) {
    mCompression = flags;
    return *this;
  }
 
 
  template <typename Pix = RGBAPix>
  const Pix &at(unsigned x, unsigned y) const {
    auto pixel_index = x + y * width();
    return *reinterpret_cast<const RGBAPix *>(mArray.data() + 4 * pixel_index);
    // return *array().cell<Pix>(x, y);
  }
 
 
  template <typename Pix = RGBAPix> Pix &at(unsigned x, unsigned y) {
    auto pixel_index = x + y * width();
    return *reinterpret_cast<RGBAPix *>(mArray.data() + 4 * pixel_index);
    // return *array().cell<Pix>(x, y);
  }
 
 
  template <typename Pix = RGBAPix>
  void write(const Pix &pix, unsigned x, unsigned y) {
    auto pixel_index = x + y * width();
    mArray[4 * pixel_index + 0] = pix.r;
    mArray[4 * pixel_index + 1] = pix.g;
    mArray[4 * pixel_index + 2] = pix.b;
    mArray[4 * pixel_index + 3] = pix.a;
    // array().write(&pix.r, x, y);
  }
 
 
  template <typename Pix = RGBAPix>
  void read(Pix &pix, unsigned x, unsigned y) const {
    auto pixel_index = x + y * width();
    pix.r = mArray[4 * pixel_index + 0];
    pix.g = mArray[4 * pixel_index + 1];
    pix.b = mArray[4 * pixel_index + 2];
    pix.a = mArray[4 * pixel_index + 3];
    // array().read(&pix.r, x, y);
  }
 
 
  template <typename T> bool resize(int dimX, int dimY /*, Format format */) {
    mArray.resize(4 * dimX * dimY);
    // mArray.formatAligned(components(format), Array::type<T>(), dimX, dimY,
    // 1);
    return true;
  }
 
  // void sendToTexture(Texture& tex, Texture::Internal i, Texture::Format f,
  // Texture::DataType d) {
  //    tex.create2D(width(), height(), i, f, d);
  //    tex.submit(pixels<uint8_t>(), f, Texture::UBYTE);
  //}
 
  // void sendToTexture(Texture& tex) {
  //    auto to_texture_internalformat = [](Format f) {
  //        switch (f) {
  //            case LUMINANCE: return Texture::R8;
  //            case LUMALPHA: return Texture::RG8;
  //            case RGB: return Texture::RGB8;
  //            case RGBA: return Texture::RGBA8;
  //            default: return Texture::RGBA8;
  //        }
  //    };
  //    auto to_texture_format = [](Format f) {
  //        switch (f) {
  //            case LUMINANCE: return Texture::RED;
  //            case LUMALPHA: return Texture::RG;
  //            case RGB: return Texture::RGB;
  //            case RGBA: return Texture::RGBA;
  //            default: return Texture::RGBA;
  //        }
  //    };
  //    sendToTexture(tex, to_texture_internalformat(format()),
  //    to_texture_format(format()), Texture::UBYTE);
  //}
 
  // static int components(Format v);
 
  // static Format getFormat(int planes);
 
  // class Impl {
  // public:
  //    virtual ~Impl() {};
  //    virtual bool load(const std::string& filename, Array& lat) = 0;
  //    virtual bool save(const std::string& filename, const Array& lat, int
  // compressFlags) = 0;
  //};
};
 
} // namespace al
#endif