primitives_fast.h

// Aseprite Document Library
// Copyright (c) 2001-2015 David Capello
//
// This file is released under the terms of the MIT license.
// Read LICENSE.txt for more information.

#ifndef DOC_PRIMITIVES_FAST_H_INCLUDED
#define DOC_PRIMITIVES_FAST_H_INCLUDED
#pragma once

#include "doc/color.h"

namespace doc {
  class Image;
  template<typename ImageTraits> class ImageImpl;

  template<class Traits>
  inline typename Traits::address_t get_pixel_address_fast(const Image* image, int x, int y) {
    ASSERT(x >= 0 && x < image->width());
    ASSERT(y >= 0 && y < image->height());

    return (((ImageImpl<Traits>*)image)->address(x, y));
  }

  template<class Traits>
  inline typename Traits::pixel_t get_pixel_fast(const Image* image, int x, int y) {
    ASSERT(x >= 0 && x < image->width());
    ASSERT(y >= 0 && y < image->height());

    return *(((ImageImpl<Traits>*)image)->address(x, y));
  }

  template<class Traits>
  inline void put_pixel_fast(Image* image, int x, int y, typename Traits::pixel_t color) {
    ASSERT(x >= 0 && x < image->width());
    ASSERT(y >= 0 && y < image->height());

    *(((ImageImpl<Traits>*)image)->address(x, y)) = color;
  }

  //////////////////////////////////////////////////////////////////////
  // Bitmap specialization

  template<>
  inline BitmapTraits::pixel_t get_pixel_fast<BitmapTraits>(const Image* image, int x, int y) {
    ASSERT(x >= 0 && x < image->width());
    ASSERT(y >= 0 && y < image->height());

    return (*image->getPixelAddress(x, y)) & (1 << (x % 8)) ? 1: 0;
  }

  template<>
  inline void put_pixel_fast<BitmapTraits>(Image* image, int x, int y, BitmapTraits::pixel_t color) {
    ASSERT(x >= 0 && x < image->width());
    ASSERT(y >= 0 && y < image->height());

    if (color)
      *image->getPixelAddress(x, y) |= (1 << (x % 8));
    else
      *image->getPixelAddress(x, y) &= ~(1 << (x % 8));
  }

} // namespace doc

#endif