/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                             CCCC  IIIII  PPPP                               %
%                            C        I    P   P                              %
%                            C        I    PPPP                               %
%                            C        I    P                                  %
%                             CCCC  IIIII  P                                  %
%                                                                             %
%                                                                             %
%                  Read/Write Cisco IP Phone Image Format                     %
%                                                                             %
%                              Software Design                                %
%                                   Cristy                                    %
%                                April 2004                                   %
%                                                                             %
%                                                                             %
%  Copyright 1999-2018 ImageMagick Studio LLC, a non-profit organization      %
%  dedicated to making software imaging solutions freely available.           %
%                                                                             %
%  You may not use this file except in compliance with the License.  You may  %
%  obtain a copy of the License at                                            %
%                                                                             %
%    https://www.imagemagick.org/script/license.php                           %
%                                                                             %
%  Unless required by applicable law or agreed to in writing, software        %
%  distributed under the License is distributed on an "AS IS" BASIS,          %
%  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
%  See the License for the specific language governing permissions and        %
%  limitations under the License.                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/

/*
  Include declarations.
*/
#include "MagickCore/studio.h"
#include "MagickCore/blob.h"
#include "MagickCore/blob-private.h"
#include "MagickCore/cache.h"
#include "MagickCore/color-private.h"
#include "MagickCore/colorspace.h"
#include "MagickCore/colorspace-private.h"
#include "MagickCore/constitute.h"
#include "MagickCore/exception.h"
#include "MagickCore/exception-private.h"
#include "MagickCore/image.h"
#include "MagickCore/image-private.h"
#include "MagickCore/list.h"
#include "MagickCore/magick.h"
#include "MagickCore/memory_.h"
#include "MagickCore/monitor.h"
#include "MagickCore/monitor-private.h"
#include "MagickCore/pixel-accessor.h"
#include "MagickCore/property.h"
#include "MagickCore/quantize.h"
#include "MagickCore/quantum-private.h"
#include "MagickCore/static.h"
#include "MagickCore/string_.h"
#include "MagickCore/module.h"
#include "MagickCore/utility.h"

/*
  Forward declarations.
*/
static MagickBooleanType
  WriteCIPImage(const ImageInfo *,Image *,ExceptionInfo *);

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e g i s t e r C I P I m a g e                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  RegisterCIPImage() adds properties for the CIP IP phone image format to
%  the list of supported formats.  The properties include the image format
%  tag, a method to read and/or write the format, whether the format
%  supports the saving of more than one frame to the same file or blob,
%  whether the format supports native in-memory I/O, and a brief
%  description of the format.
%
%  The format of the RegisterCIPImage method is:
%
%      size_t RegisterCIPImage(void)
%
*/
ModuleExport size_t RegisterCIPImage(void)
{
  MagickInfo
    *entry;

  entry=AcquireMagickInfo("CIP","CIP","Cisco IP phone image format");
  entry->encoder=(EncodeImageHandler *) WriteCIPImage;
  entry->flags^=CoderAdjoinFlag;
  (void) RegisterMagickInfo(entry);
  return(MagickImageCoderSignature);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   U n r e g i s t e r C I P I m a g e                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  UnregisterCIPImage() removes format registrations made by the
%  CIP module from the list of supported formats.
%
%  The format of the UnregisterCIPImage method is:
%
%      UnregisterCIPImage(void)
%
*/
ModuleExport void UnregisterCIPImage(void)
{
  (void) UnregisterMagickInfo("CIP");
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   W r i t e C I P I m a g e                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Procedure WriteCIPImage() writes an image to a file in the Cisco IP phone
%  image format.
%
%  The format of the WriteCIPImage method is:
%
%      MagickBooleanType WriteCIPImage(const ImageInfo *image_info,
%        Image *image,ExceptionInfo *exception)
%
%  A description of each parameter follows.
%
%    o image_info: the image info.
%
%    o image:  The image.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static MagickBooleanType WriteCIPImage(const ImageInfo *image_info,Image *image,
  ExceptionInfo *exception)
{
  char
    buffer[MagickPathExtent];

  const char
    *value;

  MagickBooleanType
    status;

  register const Quantum
    *p;

  register ssize_t
    i,
    x;

  ssize_t
    y;

  unsigned char
    byte;

  /*
    Open output image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickCoreSignature);
  assert(image != (Image *) NULL);
  assert(image->signature == MagickCoreSignature);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickCoreSignature);
  status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
  if (status == MagickFalse)
    return(status);
  (void) WriteBlobString(image,"<CiscoIPPhoneImage>\n");
  value=GetImageProperty(image,"label",exception);
  if (value != (const char *) NULL)
    (void) FormatLocaleString(buffer,MagickPathExtent,"<Title>%s</Title>\n",
      value);
  else
    {
      char
        basename[MagickPathExtent];

      GetPathComponent(image->filename,BasePath,basename);
      (void) FormatLocaleString(buffer,MagickPathExtent,"<Title>%s</Title>\n",
        basename);
    }
  (void) WriteBlobString(image,buffer);
  (void) FormatLocaleString(buffer,MagickPathExtent,
    "<LocationX>%.20g</LocationX>\n",(double) image->page.x);
  (void) WriteBlobString(image,buffer);
  (void) FormatLocaleString(buffer,MagickPathExtent,
    "<LocationY>%.20g</LocationY>\n",(double) image->page.y);
  (void) WriteBlobString(image,buffer);
  (void) FormatLocaleString(buffer,MagickPathExtent,"<Width>%.20g</Width>\n",
    (double) (image->columns+(image->columns % 2)));
  (void) WriteBlobString(image,buffer);
  (void) FormatLocaleString(buffer,MagickPathExtent,"<Height>%.20g</Height>\n",
    (double) image->rows);
  (void) WriteBlobString(image,buffer);
  (void) FormatLocaleString(buffer,MagickPathExtent,"<Depth>2</Depth>\n");
  (void) WriteBlobString(image,buffer);
  (void) WriteBlobString(image,"<Data>");
  (void) TransformImageColorspace(image,sRGBColorspace,exception);
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    p=GetVirtualPixels(image,0,y,image->columns,1,exception);
    if (p == (const Quantum *) NULL)
      break;
    for (x=0; x < ((ssize_t) image->columns-3); x+=4)
    {
      byte=(unsigned char)
        ((((size_t) (3*ClampToQuantum(GetPixelLuma(image,p+3*GetPixelChannels(image)))/QuantumRange) & 0x03) << 6) |
         (((size_t) (3*ClampToQuantum(GetPixelLuma(image,p+2*GetPixelChannels(image)))/QuantumRange) & 0x03) << 4) |
         (((size_t) (3*ClampToQuantum(GetPixelLuma(image,p+1*GetPixelChannels(image)))/QuantumRange) & 0x03) << 2) |
         (((size_t) (3*ClampToQuantum(GetPixelLuma(image,p+0*GetPixelChannels(image)))/QuantumRange) & 0x03) << 0));
      (void) FormatLocaleString(buffer,MagickPathExtent,"%02x",byte);
      (void) WriteBlobString(image,buffer);
      p+=GetPixelChannels(image);
    }
    if ((image->columns % 4) != 0)
      {
        byte=0;
        for ( ; x < (ssize_t) image->columns; x++)
        {
          i=x % 4;
          switch (i)
          {
            case 0:
            {
              byte|=(unsigned char) (((size_t) (3*ClampToQuantum(GetPixelLuma(
                image,p+MagickMin(i,3)*GetPixelChannels(image)))/
                QuantumRange) & 0x03) << 6);
              break;
            }
            case 1:
            {
              byte|=(unsigned char) (((size_t) (3*ClampToQuantum(GetPixelLuma(
                image,p+MagickMin(i,2)*GetPixelChannels(image)))/
                QuantumRange) & 0x03) << 4);
              break;
            }
            case 2:
            {
              byte|=(unsigned char) (((size_t) (3*ClampToQuantum(GetPixelLuma(
                image,p+MagickMin(i,1)*GetPixelChannels(image)))/
                QuantumRange) & 0x03) << 2);
              break;
            }
            case 3:
            {
              byte|=(unsigned char) (((size_t) (3*ClampToQuantum(GetPixelLuma(
                image,p+MagickMin(i,0)*GetPixelChannels(image)))/
                QuantumRange) & 0x03) << 0);
              break;
            }
          }
        }
        (void) FormatLocaleString(buffer,MagickPathExtent,"%02x",~byte);
        (void) WriteBlobString(image,buffer);
      }
    status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
      image->rows);
    if (status == MagickFalse)
      break;
  }
  (void) WriteBlobString(image,"</Data>\n");
  (void) WriteBlobString(image,"</CiscoIPPhoneImage>\n");
  (void) CloseBlob(image);
  return(MagickTrue);
}
