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path: root/support/dktools/dk3pixre.c
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/*
	WARNING: This file was generated by dkct.
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk3pixre.ctr
*/

/*
Copyright (C) 2011-2017, Dirk Krause

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 opyright 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 author nor the names of 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 OWNER 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 dk3pixre.c The dk3pixre module.
*/


#line 75 "dk3pixre.ctr"

#include "dk3all.h"
#include "dk3pixre.h"





#line 82 "dk3pixre.ctr"



dk3_bif_pixel_t
dk3pixre_maximum_for_width(size_t w)
{
  dk3_bif_pixel_t	back	= 0;
  unsigned		val	= 1;
  size_t		i;
  for(i = 0; i < w; i++) {
    val = val * 2;
  }
  if(val) {
    val--;
    back = (dk3_bif_pixel_t)val;
#if VERSION_BEFORE_20140809
    if (((unsigned)back) != val) {
      back = 0;
    }
#else
    if (val > (unsigned)(DK3_US_MAX)) {
      back = 0;
    }
#endif
  }
  return back;
}



int
dk3pixre_set(dk3_pixel_resample_t *pp, size_t inw, size_t outw)
{
  int			back	= 0;
  dk3_bif_pixel_t	im;
  dk3_bif_pixel_t	om;

  if (pp) {
    im = dk3pixre_maximum_for_width(inw);
    om = dk3pixre_maximum_for_width(outw);
    if ((im) && (om)) {
      pp->iw = inw;
      pp->ow = outw;
      pp->im = im;
      pp->om = om;
      pp->im2 = im / 2;
      back = 1;
    }
  }
  return back;
}



#if DK3_SIZEOF_INT >= (2 * DK3_SIZEOF_BIF_PIXEL_T)

/* BEGIN unsigned */

dk3_bif_pixel_t
dk3pixre_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
  unsigned		counter;
  unsigned		res;
  unsigned		rem;
  int			ec	= 0;
  dk3_bif_pixel_t	back;
  back = inval;
  if (pp) {
    if (pp->iw != pp->ow) {
      if (1 < pp->ow) {
        counter = dk3ma_ui_mul_ok(
          (unsigned)inval,
          (unsigned)(pp->om),
          &ec
        );
        if (0 == ec) {
          if (pp->im) {
            res = counter / (unsigned)(pp->im);
	    rem = counter % (unsigned)(pp->im);
	    if (rem > ((unsigned)(pp->im2))) { res++; }
	    back = (dk3_bif_pixel_t)res;
#if VERSION_BEFORE_20140809
	    if (((unsigned)back) != res) {
	      back = 0;
	    }
#else
	    if (res > (unsigned)(DK3_US_MAX)) {
	      back = 0;
	    }
#endif
          }
        }
      } else {
        back = ((inval > pp->im2) ? 1 : 0);
      }
    }
  }
  return back;
}



int
dk3pixre_can_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
  unsigned		counter;
  unsigned		rem;
  unsigned		res;
  int			ec	= 0;
  int			back	= 0;
#if VERSION_BEFORE_20140809
  dk3_bif_pixel_t	tv;
#endif
  if (pp) {
    if (pp->iw != pp->ow) {
      if (1 < pp->ow) {
        counter = dk3ma_ui_mul_ok(
          (unsigned)inval,
	  (unsigned)(pp->om),
	  &ec
        );
        if (0 == ec) {
          if (pp->im) {
	    res = counter / (unsigned)(pp->im);
	    rem = counter % (unsigned)(pp->im);
	    if (0 == rem) {
#if VERSION_BEFORE_20140809
	      tv = (dk3_bif_pixel_t)res;
	      if (((unsigned)tv) == res) {
	        back = 1;
	      }
#else
	      if (res <= (unsigned)(DK3_US_MAX)) {
	        back = 1;
	      }
#endif
	    }
	  }
        }
      } else {
        if ((0 == inval) || (pp->im == inval)) { back = 1; }
      }
    } else {
      back = 1;
    }
  }
  return back;
}

/* END unsigned */

#else
#if DK3_SIZEOF_LONG >= (2 * DK3_SIZEOF_BIF_PIXEL_T)

/* BEGIN unsigned long */

dk3_bif_pixel_t
dk3pixre_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
  unsigned long		counter;
  unsigned long		res;
  unsigned long		rem;
  int			ec	= 0;
  dk3_bif_pixel_t	back;
  back = inval;
  if (pp) {
    if (pp->iw != pp->ow) {
      counter = dk3ma_ul_mul_ok(
        (unsigned long)inval,
        (unsigned long)(pp->om),
        &ec
      );
      if (0 == ec) {
        if (pp->im) {
          res = counter / (unsigned long)(pp->im);
	  rem = counter % (unsigned long)(pp->im);
	  if (rem > (((unsigned long)(pp->im)) / 2UL)) { res++; }
	  back = (dk3_bif_pixel_t)res;
#if VERSION_BEFORE_20140809
	  if (((unsigned long)back) != res) {
	    back = 0;
	  }
#else
	  if (res > (unsigned long)(DK3_US_MAX)) {
	    back = 0;
	  }
#endif
        }
      }
    }
  }
  return back;
}



int
dk3pixre_can_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
  unsigned long		counter;
  unsigned long		rem;
  unsigned long		res;
  int			ec	= 0;
  int			back	= 0;
#if VERSION_BEFORE_20140809
  dk3_bif_pixel_t	tv;
#endif
  if (pp) {
    if (pp->iw != pp->ow) {
      counter = dk3ma_ul_mul_ok(
        (unsigned long)inval,
	(unsigned long)(pp->om),
	&ec
      );
      if (0 == ec) {
        if (pp->im) {
	  res = counter / (unsigned long)(pp->im);
	  rem = counter % (unsigned long)(pp->im);
	  if (0 == rem) {
#if VERSION_BEFORE_20140809
	    tv = (dk3_bif_pixel_t)res;
	    if (((unsigned long)tv) == res) {
	      back = 1;
	    }
#else
	    if (res <= (unsigned long)(DK3_US_MAX)) {
	      back = 1;
	    }
#endif
	  }
	}
      }
    } else {
      back = 1;
    }
  }
  return back;
}

/* END unsigned long */

#else

/* BEGIN dk3_um_t */

dk3_bif_pixel_t
dk3pixre_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
  dk3_um_t		counter;
  dk3_um_t		res;
  dk3_um_t		rem;
  int			ec	= 0;
  dk3_bif_pixel_t	back;
  back = inval;
  if (pp) {
    if (pp->iw != pp->ow) {
      counter = dk3ma_um_mul_ok(
        (dk3_um_t)inval,
        (dk3_um_t)(pp->om),
        &ec
      );
      if (0 == ec) {
        if (pp->im) {
          res = counter / (dk3_um_t)(pp->im);
	  rem = counter % (dk3_um_t)(pp->im);
	  if (rem > (((dk3_um_t)(pp->im)) / DK3_UM_2)) { res++; }
	  back = (dk3_bif_pixel_t)res;
	  if (((dk3_um_t)back) != res) {
	    back = 0;
	  }
        }
      }
    }
  }
  return back;
}



int
dk3pixre_can_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
  dk3_um_t		counter;
  dk3_um_t		rem;
  dk3_um_t		res;
  int			ec	= 0;
  int			back	= 0;
  dk3_bif_pixel_t	tv;
  if (pp) {
    if (pp->iw != pp->ow) {
      counter = dk3ma_um_mul_ok(
        (dk3_um_t)inval,
	(dk3_um_t)(pp->om),
	&ec
      );
      if (0 == ec) {
        if (pp->im) {
	  res = counter / (dk3_um_t)(pp->im);
	  rem = counter % (dk3_um_t)(pp->im);
	  if (0 == rem) {
	    tv = (dk3_bif_pixel_t)res;
	    if (((dk3_um_t)tv) == res) {
	      back = 1;
	    }
	  }
	}
      }
    } else {
      back = 1;
    }
  }
  return back;
}

/* END dk3_um_t */

#endif
#endif


dk3_bif_pixel_t
dk3pixre_get_value_from_packed_bytes(
  unsigned char const	*row,
  dk3_bif_coord_t	 vi,
  size_t		 bpc
)
{
  unsigned short const	*us;
  unsigned char		 uc;
  dk3_bif_coord_t	 byteindex;
  dk3_bif_coord_t	 inbyte;

  dk3_bif_pixel_t	back = (dk3_bif_pixel_t)0;
  switch(bpc) {
    case 16: {
      us = (unsigned short const *)row;
      back = us[vi];
    } break;
    case 8: {
      back =  (dk3_bif_pixel_t)(row[vi]);
      back &= 0x00FFU;
    } break;
    case 4: {
      byteindex = vi / 2L;
      inbyte    = vi % 2L;
      uc = row[byteindex];
      switch((int)inbyte) {
        case 0: {
	  uc = uc >> 4;
	} break;
      }
      back = (dk3_bif_pixel_t)uc;
      back &= 0x000FU;
    } break;
    case 2: {
      byteindex = vi / 4L;
      inbyte    = vi % 4L;
      uc = row[byteindex];
      switch((int)inbyte) {
        case 0: {
	  uc = uc >> 6;
	} break;
	case 1: {
	  uc = uc >> 4;
	} break;
	case 2: {
	  uc = uc >> 2;
	} break;
      }
      back = (dk3_bif_pixel_t)uc;
      back &= 0x0003U;
    } break;
    case 1: {
      byteindex = vi / 8L;
      inbyte    = vi % 8L;
      uc = row[byteindex];
      switch((int)inbyte) {
        case 0: { uc = uc >> 7; } break;
	case 1: { uc = uc >> 6; } break;
	case 2: { uc = uc >> 5; } break;
	case 3: { uc = uc >> 4; } break;
	case 4: { uc = uc >> 3; } break;
	case 5: { uc = uc >> 2; } break;
	case 6: { uc = uc >> 1; } break;
      }
      back = (dk3_bif_pixel_t)uc;
      back &= 0x0001U;
    } break;
  }
  return back;
}



dk3_bif_pixel_t
dk3pixre_get_max_value(dk3_pixel_resample_t const *pp)
{
  dk3_bif_pixel_t back = (dk3_bif_pixel_t)0U;
  if(pp) {
    back = pp->om;
  }
  return back;
}