root/magick/attribute.c

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DEFINITIONS

This source file includes following definitions.
  1. GetImageBoundingBox
  2. GetImageDepth
  3. GetImageChannelDepth
  4. GetImageQuantumDepth
  5. GetImageType
  6. IdentifyImageGray
  7. IdentifyImageMonochrome
  8. IdentifyImageType
  9. IsGrayImage
  10. IsMonochromeImage
  11. IsOpaqueImage
  12. SetImageDepth
  13. SetImageChannelDepth
  14. SetImageType

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%         AAA   TTTTT  TTTTT  RRRR   IIIII  BBBB   U   U  TTTTT  EEEEE        %
%        A   A    T      T    R   R    I    B   B  U   U    T    E            %
%        AAAAA    T      T    RRRR     I    BBBB   U   U    T    EEE          %
%        A   A    T      T    R R      I    B   B  U   U    T    E            %
%        A   A    T      T    R  R   IIIII  BBBB    UUU     T    EEEEE        %
%                                                                             %
%                                                                             %
%                    MagickCore Get / Set Image Attributes                    %
%                                                                             %
%                              Software Design                                %
%                                   Cristy                                    %
%                                October 2002                                 %
%                                                                             %
%                                                                             %
%  Copyright 1999-2016 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                                            %
%                                                                             %
%    http://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 "magick/studio.h"
#include "magick/artifact.h"
#include "magick/attribute.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/cache.h"
#include "magick/cache-private.h"
#include "magick/cache-view.h"
#include "magick/client.h"
#include "magick/channel.h"
#include "magick/color.h"
#include "magick/color-private.h"
#include "magick/colormap.h"
#include "magick/colormap-private.h"
#include "magick/colorspace.h"
#include "magick/colorspace-private.h"
#include "magick/composite.h"
#include "magick/composite-private.h"
#include "magick/constitute.h"
#include "magick/deprecate.h"
#include "magick/draw.h"
#include "magick/draw-private.h"
#include "magick/effect.h"
#include "magick/enhance.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/geometry.h"
#include "magick/histogram.h"
#include "magick/identify.h"
#include "magick/image.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/log.h"
#include "magick/memory_.h"
#include "magick/magick.h"
#include "magick/monitor.h"
#include "magick/monitor-private.h"
#include "magick/option.h"
#include "magick/paint.h"
#include "magick/pixel.h"
#include "magick/pixel-private.h"
#include "magick/property.h"
#include "magick/quantize.h"
#include "magick/random_.h"
#include "magick/resource_.h"
#include "magick/semaphore.h"
#include "magick/segment.h"
#include "magick/splay-tree.h"
#include "magick/string_.h"
#include "magick/thread-private.h"
#include "magick/threshold.h"
#include "magick/transform.h"
#include "magick/utility.h"

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t I m a g e B o u n d i n g B o x                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetImageBoundingBox() returns the bounding box of an image canvas.
%
%  The format of the GetImageBoundingBox method is:
%
%      RectangleInfo GetImageBoundingBox(const Image *image,
%        ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o bounds: Method GetImageBoundingBox returns the bounding box of an
%      image canvas.
%
%    o image: the image.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport RectangleInfo GetImageBoundingBox(const Image *image,
  ExceptionInfo *exception)
{
  CacheView
    *image_view;

  MagickBooleanType
    status;

  MagickPixelPacket
    target[3],
    zero;

  RectangleInfo
    bounds;

  register const PixelPacket
    *p;

  ssize_t
    y;

  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
  bounds.width=0;
  bounds.height=0;
  bounds.x=(ssize_t) image->columns;
  bounds.y=(ssize_t) image->rows;
  GetMagickPixelPacket(image,&target[0]);
  image_view=AcquireVirtualCacheView(image,exception);
  p=GetCacheViewVirtualPixels(image_view,0,0,1,1,exception);
  if (p == (const PixelPacket *) NULL)
    {
      image_view=DestroyCacheView(image_view);
      return(bounds);
    }
  SetMagickPixelPacket(image,p,GetCacheViewVirtualIndexQueue(image_view),
    &target[0]);
  GetMagickPixelPacket(image,&target[1]);
  p=GetCacheViewVirtualPixels(image_view,(ssize_t) image->columns-1,0,1,1,
    exception);
  if (p != (const PixelPacket *) NULL)
    SetMagickPixelPacket(image,p,GetCacheViewVirtualIndexQueue(image_view),
      &target[1]);
  GetMagickPixelPacket(image,&target[2]);
  p=GetCacheViewVirtualPixels(image_view,0,(ssize_t) image->rows-1,1,1,
    exception);
  if (p != (const PixelPacket *) NULL)
    SetMagickPixelPacket(image,p,GetCacheViewVirtualIndexQueue(image_view),
      &target[2]);
  status=MagickTrue;
  GetMagickPixelPacket(image,&zero);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
  #pragma omp parallel for schedule(static,4) shared(status) \
    magick_threads(image,image,image->rows,1)
#endif
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    MagickPixelPacket
      pixel;

    RectangleInfo
      bounding_box;

    register const IndexPacket
      *magick_restrict indexes;

    register const PixelPacket
      *magick_restrict p;

    register ssize_t
      x;

    if (status == MagickFalse)
      continue;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#   pragma omp critical (MagickCore_GetImageBoundingBox)
#endif
    bounding_box=bounds;
    p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
    if (p == (const PixelPacket *) NULL)
      {
        status=MagickFalse;
        continue;
      }
    indexes=GetCacheViewVirtualIndexQueue(image_view);
    pixel=zero;
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      SetMagickPixelPacket(image,p,indexes+x,&pixel);
      if ((x < bounding_box.x) &&
          (IsMagickColorSimilar(&pixel,&target[0]) == MagickFalse))
        bounding_box.x=x;
      if ((x > (ssize_t) bounding_box.width) &&
          (IsMagickColorSimilar(&pixel,&target[1]) == MagickFalse))
        bounding_box.width=(size_t) x;
      if ((y < bounding_box.y) &&
          (IsMagickColorSimilar(&pixel,&target[0]) == MagickFalse))
        bounding_box.y=y;
      if ((y > (ssize_t) bounding_box.height) &&
          (IsMagickColorSimilar(&pixel,&target[2]) == MagickFalse))
        bounding_box.height=(size_t) y;
      p++;
    }
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#   pragma omp critical (MagickCore_GetImageBoundingBox)
#endif
    {
      if (bounding_box.x < bounds.x)
        bounds.x=bounding_box.x;
      if (bounding_box.y < bounds.y)
        bounds.y=bounding_box.y;
      if (bounding_box.width > bounds.width)
        bounds.width=bounding_box.width;
      if (bounding_box.height > bounds.height)
        bounds.height=bounding_box.height;
    }
  }
  image_view=DestroyCacheView(image_view);
  if ((bounds.width == 0) && (bounds.height == 0))
    (void) ThrowMagickException(exception,GetMagickModule(),OptionWarning,
      "GeometryDoesNotContainImage","`%s'",image->filename);
  else
    {
      bounds.width-=(bounds.x-1);
      bounds.height-=(bounds.y-1);
    }
  return(bounds);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   G e t I m a g e C h a n n e l D e p t h                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetImageChannelDepth() returns the depth of a particular image channel.
%
%  The format of the GetImageChannelDepth method is:
%
%      size_t GetImageDepth(const Image *image,ExceptionInfo *exception)
%      size_t GetImageChannelDepth(const Image *image,
%        const ChannelType channel,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o channel: the channel.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport size_t GetImageDepth(const Image *image,ExceptionInfo *exception)
{
  return(GetImageChannelDepth(image,CompositeChannels,exception));
}

MagickExport size_t GetImageChannelDepth(const Image *image,
  const ChannelType channel,ExceptionInfo *exception)
{
  CacheView
    *image_view;

  MagickBooleanType
    status;

  register ssize_t
    i;

  size_t
    *current_depth,
    depth,
    number_threads;

  ssize_t
    y;

  /*
    Compute image depth.
  */
  assert(image != (Image *) NULL);

  assert(image->signature == MagickSignature);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
  number_threads=(size_t) GetMagickResourceLimit(ThreadResource);
  current_depth=(size_t *) AcquireQuantumMemory(number_threads,
    sizeof(*current_depth));
  if (current_depth == (size_t *) NULL)
    ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
  status=MagickTrue;
  for (i=0; i < (ssize_t) number_threads; i++)
    current_depth[i]=1;
  if ((image->storage_class == PseudoClass) && (image->matte == MagickFalse))
    {
#if defined(MAGICKCORE_OPENMP_SUPPORT)
      #pragma omp parallel for schedule(static,4) shared(status) \
        magick_threads(image,image,1,1)
#endif
      for (i=0; i < (ssize_t) image->colors; i++)
      {
        const int
          id = GetOpenMPThreadId();

        while (current_depth[id] < MAGICKCORE_QUANTUM_DEPTH)
        {
          MagickBooleanType
            atDepth;

          QuantumAny
            range;

          atDepth=MagickTrue;
          range=GetQuantumRange(current_depth[id]);
          if ((atDepth != MagickFalse) && ((channel & RedChannel) != 0))
            if (IsPixelAtDepth(image->colormap[i].red,range) == MagickFalse)
              atDepth=MagickFalse;
          if ((atDepth != MagickFalse) && ((channel & GreenChannel) != 0))
            if (IsPixelAtDepth(image->colormap[i].green,range) == MagickFalse)
              atDepth=MagickFalse;
          if ((atDepth != MagickFalse) && ((channel & BlueChannel) != 0))
            if (IsPixelAtDepth(image->colormap[i].blue,range) == MagickFalse)
              atDepth=MagickFalse;
          if ((atDepth != MagickFalse))
            break;
          current_depth[id]++;
        }
      }
      depth=current_depth[0];
      for (i=1; i < (ssize_t) number_threads; i++)
        if (depth < current_depth[i])
          depth=current_depth[i];
      current_depth=(size_t *) RelinquishMagickMemory(current_depth);
      return(depth);
    }
  image_view=AcquireVirtualCacheView(image,exception);
#if !defined(MAGICKCORE_HDRI_SUPPORT)
DisableMSCWarning(4127)
  if (QuantumRange <= MaxMap)
RestoreMSCWarning
    {
      size_t
        *depth_map;

      /*
        Scale pixels to desired (optimized with depth map).
      */
      depth_map=(size_t *) AcquireQuantumMemory(MaxMap+1,sizeof(*depth_map));
      if (depth_map == (size_t *) NULL)
        ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
      for (i=0; i <= (ssize_t) MaxMap; i++)
      {
        unsigned int
          depth;

        for (depth=1; depth < MAGICKCORE_QUANTUM_DEPTH; depth++)
        {
          Quantum
            pixel;

          QuantumAny
            range;

          range=GetQuantumRange(depth);
          pixel=(Quantum) i;
          if (pixel == ScaleAnyToQuantum(ScaleQuantumToAny(pixel,range),range))
            break;
        }
        depth_map[i]=depth;
      }
#if defined(MAGICKCORE_OPENMP_SUPPORT)
      #pragma omp parallel for schedule(static,4) shared(status) \
        magick_threads(image,image,image->rows,1)
#endif
      for (y=0; y < (ssize_t) image->rows; y++)
      {
        const int
          id = GetOpenMPThreadId();

        register const IndexPacket
          *magick_restrict indexes;

        register const PixelPacket
          *magick_restrict p;

        register ssize_t
          x;

        if (status == MagickFalse)
          continue;
        p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
        if (p == (const PixelPacket *) NULL)
          continue;
        indexes=GetCacheViewVirtualIndexQueue(image_view);
        for (x=0; x < (ssize_t) image->columns; x++)
        {
          Quantum
            pixel;

          if ((channel & RedChannel) != 0)
            {
              pixel=GetPixelRed(p);
              if (depth_map[ScaleQuantumToMap(pixel)] > current_depth[id])
                current_depth[id]=depth_map[ScaleQuantumToMap(pixel)];
            }
          if ((channel & GreenChannel) != 0)
            {
              pixel=GetPixelGreen(p);
              if (depth_map[ScaleQuantumToMap(pixel)] > current_depth[id])
                current_depth[id]=depth_map[ScaleQuantumToMap(pixel)];
            }
          if ((channel & BlueChannel) != 0)
            {
              pixel=GetPixelBlue(p);
              if (depth_map[ScaleQuantumToMap(pixel)] > current_depth[id])
                current_depth[id]=depth_map[ScaleQuantumToMap(pixel)];
            }
          if (((channel & OpacityChannel) != 0) &&
               (image->matte != MagickFalse))
            {
              pixel=GetPixelOpacity(p);
              if (depth_map[ScaleQuantumToMap(pixel)] > current_depth[id])
                current_depth[id]=depth_map[ScaleQuantumToMap(pixel)];
            }
          if (((channel & IndexChannel) != 0) &&
              (image->colorspace == CMYKColorspace))
            {
              pixel=GetPixelIndex(indexes+x);
              if (depth_map[ScaleQuantumToMap(pixel)] > current_depth[id])
                current_depth[id]=depth_map[ScaleQuantumToMap(pixel)];
            }
          p++;
        }
        if (current_depth[id] == MAGICKCORE_QUANTUM_DEPTH)
          status=MagickFalse;
      }
      image_view=DestroyCacheView(image_view);
      depth=current_depth[0];
      for (i=1; i < (ssize_t) number_threads; i++)
        if (depth < current_depth[i])
          depth=current_depth[i];
      depth_map=(size_t *) RelinquishMagickMemory(depth_map);
      current_depth=(size_t *) RelinquishMagickMemory(current_depth);
      return(depth);
    }
#endif
#if defined(MAGICKCORE_OPENMP_SUPPORT)
  #pragma omp parallel for schedule(static,4) shared(status) \
    magick_threads(image,image,image->rows,1)
#endif
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    const int
      id = GetOpenMPThreadId();

    register const IndexPacket
      *magick_restrict indexes;

    register const PixelPacket
      *magick_restrict p;

    register ssize_t
      x;

    if (status == MagickFalse)
      continue;
    p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
    if (p == (const PixelPacket *) NULL)
      continue;
    indexes=GetCacheViewVirtualIndexQueue(image_view);
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      while (current_depth[id] < MAGICKCORE_QUANTUM_DEPTH)
      {
        MagickBooleanType
          atDepth;

        QuantumAny
          range;

        atDepth=MagickTrue;
        range=GetQuantumRange(current_depth[id]);
        if ((atDepth != MagickFalse) && ((channel & RedChannel) != 0))
          if (IsPixelAtDepth(GetPixelRed(p),range) == MagickFalse)
            atDepth=MagickFalse;
        if ((atDepth != MagickFalse) && ((channel & GreenChannel) != 0))
          if (IsPixelAtDepth(GetPixelGreen(p),range) == MagickFalse)
            atDepth=MagickFalse;
        if ((atDepth != MagickFalse) && ((channel & BlueChannel) != 0))
          if (IsPixelAtDepth(GetPixelBlue(p),range) == MagickFalse)
            atDepth=MagickFalse;
        if ((atDepth != MagickFalse) && ((channel & OpacityChannel) != 0) &&
             (image->matte != MagickFalse))
          if (IsPixelAtDepth(GetPixelOpacity(p),range) == MagickFalse)
            atDepth=MagickTrue;
        if ((atDepth != MagickFalse) && ((channel & IndexChannel) != 0) &&
             (image->colorspace == CMYKColorspace))
          if (IsPixelAtDepth(GetPixelIndex(indexes+x),range) == MagickFalse)
            atDepth=MagickFalse;
        if ((atDepth != MagickFalse))
          break;
        current_depth[id]++;
      }
      p++;
    }
    if (current_depth[id] == MAGICKCORE_QUANTUM_DEPTH)
      status=MagickFalse;
  }
  image_view=DestroyCacheView(image_view);
  depth=current_depth[0];
  for (i=1; i < (ssize_t) number_threads; i++)
    if (depth < current_depth[i])
      depth=current_depth[i];
  current_depth=(size_t *) RelinquishMagickMemory(current_depth);
  return(depth);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   G e t I m a g e Q u a n t u m D e p t h                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetImageQuantumDepth() returns the depth of the image rounded to a legal
%  quantum depth: 8, 16, or 32.
%
%  The format of the GetImageQuantumDepth method is:
%
%      size_t GetImageQuantumDepth(const Image *image,
%        const MagickBooleanType constrain)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o constrain: A value other than MagickFalse, constrains the depth to
%      a maximum of MAGICKCORE_QUANTUM_DEPTH.
%
*/
MagickExport size_t GetImageQuantumDepth(const Image *image,
  const MagickBooleanType constrain)
{
  size_t
    depth;

  depth=image->depth;
  if (depth <= 8)
    depth=8;
  else
    if (depth <= 16)
      depth=16;
    else
      if (depth <= 32)
        depth=32;
      else
        if (depth <= 64)
          depth=64;
  if (constrain != MagickFalse)
    depth=(size_t) MagickMin((double) depth,(double) MAGICKCORE_QUANTUM_DEPTH);
  return(depth);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   G e t I m a g e T y p e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetImageType() returns the potential type of image:
%
%        Bilevel         Grayscale        GrayscaleMatte
%        Palette         PaletteMatte     TrueColor
%        TrueColorMatte  ColorSeparation  ColorSeparationMatte
%
%  To ensure the image type matches its potential, use SetImageType():
%
%    (void) SetImageType(image,GetImageType(image));
%
%  The format of the GetImageType method is:
%
%      ImageType GetImageType(const Image *image,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport ImageType GetImageType(const Image *image,ExceptionInfo *exception)
{
  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
  if (image->colorspace == CMYKColorspace)
    {
      if (image->matte == MagickFalse)
        return(ColorSeparationType);
      return(ColorSeparationMatteType);
    }
  if (IsMonochromeImage(image,exception) != MagickFalse)
    return(BilevelType);
  if (IsGrayImage(image,exception) != MagickFalse)
    {
      if (image->matte != MagickFalse)
        return(GrayscaleMatteType);
      return(GrayscaleType);
    }
  if (IsPaletteImage(image,exception) != MagickFalse)
    {
      if (image->matte != MagickFalse)
        return(PaletteMatteType);
      return(PaletteType);
    }
  if (image->matte != MagickFalse)
    return(TrueColorMatteType);
  return(TrueColorType);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%     I d e n t i f y I m a g e G r a y                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  either 0 or QuantumRange. Otherwise undefined is returned.
%
%  The format of the IdentifyImageGray method is:
%
%      ImageType IdentifyImageGray(const Image *image,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport ImageType IdentifyImageGray(const Image *image,
  ExceptionInfo *exception)
{
  CacheView
    *image_view;

  ImageType
    type;

  register const PixelPacket
    *p;

  register ssize_t
    x;

  ssize_t
    y;

  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
  if ((image->type == BilevelType) || (image->type == GrayscaleType) ||
      (image->type == GrayscaleMatteType))
    return(image->type);
  if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
    return(UndefinedType);
  type=BilevelType;
  image_view=AcquireVirtualCacheView(image,exception);
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
    if (p == (const PixelPacket *) NULL)
      break;
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      if (IsPixelGray(p) == MagickFalse)
        {
          type=UndefinedType;
          break;
        }
      if ((type == BilevelType) && (IsPixelMonochrome(p) == MagickFalse))
        type=GrayscaleType;
      p++;
    }
    if (type == UndefinedType)
      break;
  }
  image_view=DestroyCacheView(image_view);
  if ((type == GrayscaleType) && (image->matte != MagickFalse))
    type=GrayscaleMatteType;
  return(type);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   I d e n t i f y I m a g e M o n o c h r o m e                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  IdentifyImageMonochrome() returns MagickTrue if all the pixels in the image
%  have the same red, green, and blue intensities and the intensity is either
%  0 or QuantumRange.
%
%  The format of the IdentifyImageMonochrome method is:
%
%      MagickBooleanType IdentifyImageMonochrome(const Image *image,
%        ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType IdentifyImageMonochrome(const Image *image,
  ExceptionInfo *exception)
{
  CacheView
    *image_view;

  ImageType
    type;

  register ssize_t
    x;

  register const PixelPacket
    *p;

  ssize_t
    y;

  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
  if (image->type == BilevelType)
    return(MagickTrue);
  if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
    return(MagickFalse);
  type=BilevelType;
  image_view=AcquireVirtualCacheView(image,exception);
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
    if (p == (const PixelPacket *) NULL)
      break;
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      if (IsPixelMonochrome(p) == MagickFalse)
        {
          type=UndefinedType;
          break;
        }
      p++;
    }
    if (type == UndefinedType)
      break;
  }
  image_view=DestroyCacheView(image_view);
  if (type == BilevelType)
    return(MagickTrue);
  return(MagickFalse);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   I d e n t i f y I m a g e T y p e                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  IdentifyImageType() returns the potential type of image:
%
%        Bilevel         Grayscale        GrayscaleMatte
%        Palette         PaletteMatte     TrueColor
%        TrueColorMatte  ColorSeparation  ColorSeparationMatte
%
%  To ensure the image type matches its potential, use SetImageType():
%
%    (void) SetImageType(image,IdentifyImageType(image,exception),exception);
%
%  The format of the IdentifyImageType method is:
%
%      ImageType IdentifyImageType(const Image *image,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport ImageType IdentifyImageType(const Image *image,
  ExceptionInfo *exception)
{
  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
  if (image->colorspace == CMYKColorspace)
    {
      if (image->matte == MagickFalse)
        return(ColorSeparationType);
      return(ColorSeparationMatteType);
    }
  if (IdentifyImageMonochrome(image,exception) != MagickFalse)
    return(BilevelType);
  if (IdentifyImageGray(image,exception) != UndefinedType)
    {
      if (image->matte != MagickFalse)
        return(GrayscaleMatteType);
      return(GrayscaleType);
    }
  if (IdentifyPaletteImage(image,exception) != MagickFalse)
    {
      if (image->matte != MagickFalse)
        return(PaletteMatteType);
      return(PaletteType);
    }
  if (image->matte != MagickFalse)
    return(TrueColorMatteType);
  return(TrueColorType);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%     I s G r a y I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  IsGrayImage() returns MagickTrue if the type of the image is grayscale or
%  bi-level.
%
%  The format of the IsGrayImage method is:
%
%      MagickBooleanType IsGrayImage(const Image *image,
%        ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType IsGrayImage(const Image *image,
  ExceptionInfo *exception)
{
  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  if ((image->type == BilevelType) || (image->type == GrayscaleType) ||
      (image->type == GrayscaleMatteType))
    return(MagickTrue);
  return(MagickFalse);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   I s M o n o c h r o m e I m a g e                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  IsMonochromeImage() returns MagickTrue if type of the image is bi-level.
%
%  The format of the IsMonochromeImage method is:
%
%      MagickBooleanType IsMonochromeImage(const Image *image,
%        ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType IsMonochromeImage(const Image *image,
  ExceptionInfo *exception)
{
  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  if (image->type == BilevelType)
    return(MagickTrue);
  return(MagickFalse);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%     I s O p a q u e I m a g e                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  IsOpaqueImage() returns MagickTrue if none of the pixels in the image have
%  an opacity value other than opaque (0).
%
%  The format of the IsOpaqueImage method is:
%
%      MagickBooleanType IsOpaqueImage(const Image *image,
%        ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType IsOpaqueImage(const Image *image,
  ExceptionInfo *exception)
{
  CacheView
    *image_view;

  register const PixelPacket
    *p;

  register ssize_t
    x;

  ssize_t
    y;

  /*
    Determine if image is opaque.
  */
  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
  if (image->matte == MagickFalse)
    return(MagickTrue);
  image_view=AcquireVirtualCacheView(image,exception);
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
    if (p == (const PixelPacket *) NULL)
      break;
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      if (GetPixelOpacity(p) != OpaqueOpacity)
        break;
      p++;
    }
    if (x < (ssize_t) image->columns)
      break;
  }
  image_view=DestroyCacheView(image_view);
  return(y < (ssize_t) image->rows ? MagickFalse : MagickTrue);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   S e t I m a g e C h a n n e l D e p t h                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  SetImageChannelDepth() sets the depth of the image.
%
%  The format of the SetImageChannelDepth method is:
%
%      MagickBooleanType SetImageDepth(Image *image,const size_t depth)
%      MagickBooleanType SetImageChannelDepth(Image *image,
%        const ChannelType channel,const size_t depth)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o channel: the channel.
%
%    o depth: the image depth.
%
*/

MagickExport MagickBooleanType SetImageDepth(Image *image,
  const size_t depth)
{
  return(SetImageChannelDepth(image,CompositeChannels,depth));
}

MagickExport MagickBooleanType SetImageChannelDepth(Image *image,
  const ChannelType channel,const size_t depth)
{
  CacheView
    *image_view;

  ExceptionInfo
    *exception;

  MagickBooleanType
    status;

  QuantumAny
    range;

  ssize_t
    y;

  assert(image != (Image *) NULL);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(image->signature == MagickSignature);
  if (depth >= MAGICKCORE_QUANTUM_DEPTH)
    {
      image->depth=depth;
      return(MagickTrue);
    }
  range=GetQuantumRange(depth);
  if (image->storage_class == PseudoClass)
    {
      register ssize_t
        i;

#if defined(MAGICKCORE_OPENMP_SUPPORT)
      #pragma omp parallel for schedule(static,4) shared(status) \
        magick_threads(image,image,1,1)
#endif
      for (i=0; i < (ssize_t) image->colors; i++)
      {
        if ((channel & RedChannel) != 0)
          image->colormap[i].red=ScaleAnyToQuantum(ScaleQuantumToAny(
            ClampPixel(image->colormap[i].red),range),range);
        if ((channel & GreenChannel) != 0)
          image->colormap[i].green=ScaleAnyToQuantum(ScaleQuantumToAny(
            ClampPixel(image->colormap[i].green),range),range);
        if ((channel & BlueChannel) != 0)
          image->colormap[i].blue=ScaleAnyToQuantum(ScaleQuantumToAny(
            ClampPixel(image->colormap[i].blue),range),range);
        if ((channel & OpacityChannel) != 0)
          image->colormap[i].opacity=ScaleAnyToQuantum(ScaleQuantumToAny(
            ClampPixel(image->colormap[i].opacity),range),range);
      }
    }
  status=MagickTrue;
  exception=(&image->exception);
  image_view=AcquireAuthenticCacheView(image,exception);
#if !defined(MAGICKCORE_HDRI_SUPPORT)
DisableMSCWarning(4127)
  if (QuantumRange <= MaxMap)
RestoreMSCWarning
    {
      Quantum
        *depth_map;

      register ssize_t
        i;

      /*
        Scale pixels to desired (optimized with depth map).
      */
      depth_map=(Quantum *) AcquireQuantumMemory(MaxMap+1,sizeof(*depth_map));
      if (depth_map == (Quantum *) NULL)
        ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
      for (i=0; i <= (ssize_t) MaxMap; i++)
        depth_map[i]=ScaleAnyToQuantum(ScaleQuantumToAny((Quantum) i,range),
          range);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
      #pragma omp parallel for schedule(static,4) shared(status) \
        magick_threads(image,image,image->rows,1)
#endif
      for (y=0; y < (ssize_t) image->rows; y++)
      {
        register ssize_t
          x;

        register PixelPacket
          *magick_restrict q;

        if (status == MagickFalse)
          continue;
        q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
          exception);
        if (q == (PixelPacket *) NULL)
          {
            status=MagickFalse;
            continue;
          }
        for (x=0; x < (ssize_t) image->columns; x++)
        {
          if ((channel & RedChannel) != 0)
            SetPixelRed(q,depth_map[ScaleQuantumToMap(GetPixelRed(q))]);
          if ((channel & GreenChannel) != 0)
            SetPixelGreen(q,depth_map[ScaleQuantumToMap(GetPixelGreen(q))]);
          if ((channel & BlueChannel) != 0)
            SetPixelBlue(q,depth_map[ScaleQuantumToMap(GetPixelBlue(q))]);
          if (((channel & OpacityChannel) != 0) &&
              (image->matte != MagickFalse))
            SetPixelOpacity(q,depth_map[ScaleQuantumToMap(GetPixelOpacity(q))]);
          q++;
        }
        if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
          {
            status=MagickFalse;
            continue;
          }
      }
      image_view=DestroyCacheView(image_view);
      depth_map=(Quantum *) RelinquishMagickMemory(depth_map);
      if (status != MagickFalse)
        image->depth=depth;
      return(status);
    }
#endif
  /*
    Scale pixels to desired depth.
  */
#if defined(MAGICKCORE_OPENMP_SUPPORT)
  #pragma omp parallel for schedule(static,4) shared(status) \
    magick_threads(image,image,image->rows,1)
#endif
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    register ssize_t
      x;

    register PixelPacket
      *magick_restrict q;

    if (status == MagickFalse)
      continue;
    q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
    if (q == (PixelPacket *) NULL)
      {
        status=MagickFalse;
        continue;
      }
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      if ((channel & RedChannel) != 0)
        SetPixelRed(q,ScaleAnyToQuantum(ScaleQuantumToAny(ClampPixel(
          GetPixelRed(q)),range),range));
      if ((channel & GreenChannel) != 0)
        SetPixelGreen(q,ScaleAnyToQuantum(ScaleQuantumToAny(ClampPixel(
          GetPixelGreen(q)),range),range));
      if ((channel & BlueChannel) != 0)
        SetPixelBlue(q,ScaleAnyToQuantum(ScaleQuantumToAny(ClampPixel(
          GetPixelBlue(q)),range),range));
      if (((channel & OpacityChannel) != 0) && (image->matte != MagickFalse))
        SetPixelOpacity(q,ScaleAnyToQuantum(ScaleQuantumToAny(ClampPixel(
          GetPixelOpacity(q)),range),range));
      q++;
    }
    if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
      {
        status=MagickFalse;
        continue;
      }
  }
  image_view=DestroyCacheView(image_view);
  if (status != MagickFalse)
    image->depth=depth;
  return(status);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   S e t I m a g e T y p e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  SetImageType() sets the type of image.  Choose from these types:
%
%      BilevelType, GrayscaleType, GrayscaleMatteType, PaletteType,
%      PaletteMatteType, TrueColorType, TrueColorMatteType,
%      ColorSeparationType, ColorSeparationMatteType, OptimizeType
%
%  The format of the SetImageType method is:
%
%      MagickBooleanType SetImageType(Image *image,const ImageType type)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o type: Image type.
%
*/
MagickExport MagickBooleanType SetImageType(Image *image,const ImageType type)
{
  const char
    *artifact;

  ImageInfo
    *image_info;

  MagickBooleanType
    status;

  QuantizeInfo
    *quantize_info;

  assert(image != (Image *) NULL);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(image->signature == MagickSignature);
  status=MagickTrue;
  image_info=AcquireImageInfo();
  image_info->dither=image->dither;
  artifact=GetImageArtifact(image,"dither");
  if (artifact != (const char *) NULL)
    (void) SetImageOption(image_info,"dither",artifact);
  switch (type)
  {
    case BilevelType:
    {
      if (SetImageMonochrome(image,&image->exception) == MagickFalse)
        {
          status=TransformImageColorspace(image,GRAYColorspace);
          (void) NormalizeImage(image);
          quantize_info=AcquireQuantizeInfo(image_info);
          quantize_info->number_colors=2;
          quantize_info->colorspace=GRAYColorspace;
          status=QuantizeImage(quantize_info,image);
          quantize_info=DestroyQuantizeInfo(quantize_info);
        }
      image->colors=2;
      image->matte=MagickFalse;
      break;
    }
    case GrayscaleType:
    {
      if (SetImageGray(image,&image->exception) == MagickFalse)
        status=TransformImageColorspace(image,GRAYColorspace);
      image->matte=MagickFalse;
      break;
    }
    case GrayscaleMatteType:
    {
      if (SetImageGray(image,&image->exception) == MagickFalse)
        status=TransformImageColorspace(image,GRAYColorspace);
      if (image->matte == MagickFalse)
        (void) SetImageAlphaChannel(image,OpaqueAlphaChannel);
      break;
    }
    case PaletteType:
    {
      if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
        status=TransformImageColorspace(image,sRGBColorspace);
      if ((image->storage_class == DirectClass) || (image->colors > 256))
        {
          quantize_info=AcquireQuantizeInfo(image_info);
          quantize_info->number_colors=256;
          status=QuantizeImage(quantize_info,image);
          quantize_info=DestroyQuantizeInfo(quantize_info);
        }
      image->matte=MagickFalse;
      break;
    }
    case PaletteBilevelMatteType:
    {
      if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
        status=TransformImageColorspace(image,sRGBColorspace);
      if (image->matte == MagickFalse)
        (void) SetImageAlphaChannel(image,OpaqueAlphaChannel);
      (void) BilevelImageChannel(image,AlphaChannel,(double) QuantumRange/2.0);
      quantize_info=AcquireQuantizeInfo(image_info);
      status=QuantizeImage(quantize_info,image);
      quantize_info=DestroyQuantizeInfo(quantize_info);
      break;
    }
    case PaletteMatteType:
    {
      if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
        status=TransformImageColorspace(image,sRGBColorspace);
      if (image->matte == MagickFalse)
        (void) SetImageAlphaChannel(image,OpaqueAlphaChannel);
      quantize_info=AcquireQuantizeInfo(image_info);
      quantize_info->colorspace=TransparentColorspace;
      status=QuantizeImage(quantize_info,image);
      quantize_info=DestroyQuantizeInfo(quantize_info);
      break;
    }
    case TrueColorType:
    {
      if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
        status=TransformImageColorspace(image,sRGBColorspace);
      if (image->storage_class != DirectClass)
        status=SetImageStorageClass(image,DirectClass);
      image->matte=MagickFalse;
      break;
    }
    case TrueColorMatteType:
    {
      if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
        status=TransformImageColorspace(image,sRGBColorspace);
      if (image->storage_class != DirectClass)
        status=SetImageStorageClass(image,DirectClass);
      if (image->matte == MagickFalse)
        (void) SetImageAlphaChannel(image,OpaqueAlphaChannel);
      break;
    }
    case ColorSeparationType:
    {
      if (image->colorspace != CMYKColorspace)
        {
          if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
            (void) TransformImageColorspace(image,sRGBColorspace);
          status=TransformImageColorspace(image,CMYKColorspace);
        }
      if (image->storage_class != DirectClass)
        status=SetImageStorageClass(image,DirectClass);
      image->matte=MagickFalse;
      break;
    }
    case ColorSeparationMatteType:
    {
      if (image->colorspace != CMYKColorspace)
        {
          if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
            (void) TransformImageColorspace(image,sRGBColorspace);
          status=TransformImageColorspace(image,CMYKColorspace);
        }
      if (image->storage_class != DirectClass)
        status=SetImageStorageClass(image,DirectClass);
      if (image->matte == MagickFalse)
        (void) SetImageAlphaChannel(image,OpaqueAlphaChannel);
      break;
    }
    case OptimizeType:
    case UndefinedType:
      break;
  }
  image_info=DestroyImageInfo(image_info);
  if (status == MagickFalse)
    return(MagickFalse);
  image->type=type;
  return(MagickTrue);
}

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