C++ DestroyCacheView函数代码示例

Magick::Pixels::~Pixels(void)
{
  if (_view)
    _view=DestroyCacheView(_view);

  (void) DestroyExceptionInfo(&_exception);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%     I s I m a g e G r a y                                                   %
%                                                                             %
%                                                                             %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  IsImageGray() returns MagickTrue if all the pixels in the image have the
%  same red, green, and blue intensities.
%
%  The format of the IsImageGray method is:
%
%      MagickBooleanType IsImageGray(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 IsImageGray(const Image *image,
  ExceptionInfo *exception)
{
  CacheView
    *image_view;

  ImageType
    type;

  register const Quantum
    *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(MagickTrue);
  if ((IsGrayColorspace(image->colorspace) == MagickFalse) &&
      (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 Quantum *) NULL)
      break;
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      if (IsPixelGray(image,p) == MagickFalse)
        {
          type=UndefinedType;
          break;
        }
      if ((type == BilevelType) &&
          (IsPixelMonochrome(image,p) == MagickFalse))
        type=GrayscaleType;
      p+=GetPixelChannels(image);
    }
    if (type == UndefinedType)
      break;
  }
  image_view=DestroyCacheView(image_view);
  if (type == UndefinedType)
    return(MagickFalse);
  ((Image *) image)->type=type;
  if ((type == GrayscaleType) && (image->alpha_trait == BlendPixelTrait))
    ((Image *) image)->type=GrayscaleMatteType;
  return(SetImageColorspace((Image *) image,GRAYColorspace,exception));
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%     C y c l e C o l o r m a p I m a g e                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  CycleColormap() displaces an image's colormap by a given number of
%  positions.  If you cycle the colormap a number of times you can produce
%  a psychodelic effect.
%
%  WARNING: this assumes an images colormap is in a well know and defined
%  order. Currently Imagemagick has no way of setting that order.
%
%  The format of the CycleColormapImage method is:
%
%      MagickBooleanType CycleColormapImage(Image *image,const ssize_t displace,
%        ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o displace:  displace the colormap this amount.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType CycleColormapImage(Image *image,
  const ssize_t displace,ExceptionInfo *exception)
{
  CacheView
    *image_view;

  MagickBooleanType
    status;

  ssize_t
    y;

  assert(image != (Image *) NULL);
  assert(image->signature == MagickCoreSignature);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
  if (image->storage_class == DirectClass)
    (void) SetImageType(image,PaletteType,exception);
  status=MagickTrue;
  image_view=AcquireAuthenticCacheView(image,exception);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
  #pragma omp parallel for schedule(static,4) \
    magick_threads(image,image,1,1)
#endif
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    register ssize_t
      x;

    register Quantum
      *restrict q;

    ssize_t
      index;

    if (status == MagickFalse)
      continue;
    q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
    if (q == (Quantum *) NULL)
      {
        status=MagickFalse;
        continue;
      }
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      index=(ssize_t) (GetPixelIndex(image,q)+displace) % image->colors;
      if (index < 0)
        index+=(ssize_t) image->colors;
      SetPixelIndex(image,(Quantum) index,q);
      SetPixelViaPixelInfo(image,image->colormap+(ssize_t) index,q);
      q+=GetPixelChannels(image);
    }
    if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
      status=MagickFalse;
  }
  image_view=DestroyCacheView(image_view);
  return(status);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%     I s G r a y I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  IsGrayImage() returns MagickTrue if all the pixels in the image have the
%  same red, green, and blue intensities.
%
%  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)
{
  CacheView
    *image_view;

  ImageType
    type;

  long
    y;

  register const PixelPacket
    *p;

  register long
    x;

  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(MagickTrue);
  if (image->colorspace == CMYKColorspace)
    return(MagickFalse);
  type=BilevelType;
  image_view=AcquireCacheView(image);
  for (y=0; y < (long) image->rows; y++)
  {
    p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
    if (p == (const PixelPacket *) NULL)
      break;
    for (x=0; x < (long) image->columns; x++)
    {
      if (IsGrayPixel(p) == MagickFalse)
        {
          type=UndefinedType;
          break;
        }
      if ((type == BilevelType) && (IsMonochromePixel(p) == MagickFalse))
        type=GrayscaleType;
      p++;
    }
    if (type == UndefinedType)
      break;
  }
  image_view=DestroyCacheView(image_view);
  if (type == UndefinedType)
    return(MagickFalse);
  ((Image *) image)->type=type;
  if ((type == GrayscaleType) && (image->matte != MagickFalse))
    ((Image *) image)->type=GrayscaleMatteType;
  return(MagickTrue);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
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%   D e s t r o y I m a g e V i e w                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DestroyImageView() deallocates memory associated with a image view.
%
%  The format of the DestroyImageView method is:
%
%      ImageView *DestroyImageView(ImageView *image_view)
%
%  A description of each parameter follows:
%
%    o image_view: the image view.
%
*/
MagickExport ImageView *DestroyImageView(ImageView *image_view)
{
  assert(image_view != (ImageView *) NULL);
  assert(image_view->signature == MagickSignature);
  if (image_view->description != (char *) NULL)
    image_view->description=DestroyString(image_view->description);
  image_view->view=DestroyCacheView(image_view->view);
  image_view->exception=DestroyExceptionInfo(image_view->exception);
  image_view->signature=(~MagickSignature);
  image_view=(ImageView *) RelinquishMagickMemory(image_view);
  return(image_view);
}

WandExport PixelView *DestroyPixelView(PixelView *pixel_view)
{
  assert(pixel_view != (PixelView *) NULL);
  assert(pixel_view->signature == WandSignature);
  pixel_view->pixel_wands=DestroyPixelsThreadSet(pixel_view->pixel_wands,
    pixel_view->region.width,pixel_view->number_threads);
  pixel_view->view=DestroyCacheView(pixel_view->view);
  pixel_view->exception=DestroyExceptionInfo(pixel_view->exception);
  pixel_view->signature=(~WandSignature);
  RelinquishWandId(pixel_view->id);
  pixel_view=(PixelView *) RelinquishMagickMemory(pixel_view);
  return(pixel_view);
}

WandExport WandView *DestroyWandView(WandView *wand_view)
{
  assert(wand_view != (WandView *) NULL);
  assert(wand_view->signature == WandSignature);
  wand_view->pixel_wands=DestroyPixelsThreadSet(wand_view->pixel_wands,
    wand_view->extent.width,wand_view->number_threads);
  wand_view->view=DestroyCacheView(wand_view->view);
  wand_view->exception=DestroyExceptionInfo(wand_view->exception);
  wand_view->signature=(~WandSignature);
  RelinquishWandId(wand_view->id);
  wand_view=(WandView *) RelinquishMagickMemory(wand_view);
  return(wand_view);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   D e s t r o y P i x e l I t e r a t o r                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DestroyPixelIterator() deallocates resources associated with a PixelIterator.
%
%  The format of the DestroyPixelIterator method is:
%
%      PixelIterator *DestroyPixelIterator(PixelIterator *iterator)
%
%  A description of each parameter follows:
%
%    o iterator: the pixel iterator.
%
*/
WandExport PixelIterator *DestroyPixelIterator(PixelIterator *iterator)
{
  assert(iterator != (const PixelIterator *) NULL);
  assert(iterator->signature == WandSignature);
  if (iterator->debug != MagickFalse)
    (void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
  iterator->view=DestroyCacheView(iterator->view);
  iterator->pixel_wands=DestroyPixelWands(iterator->pixel_wands,
    iterator->region.width);
  iterator->exception=DestroyExceptionInfo(iterator->exception);
  iterator->signature=(~WandSignature);
  RelinquishWandId(iterator->id);
  iterator=(PixelIterator *) RelinquishMagickMemory(iterator);
  return(iterator);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%     I s I m a g e O p a q u e                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  IsImageOpaque() returns MagickTrue if none of the pixels in the image have
%  an alpha value other than OpaqueAlpha (QuantumRange).
%
%  Will return true immediatally is alpha channel is not available.
%
%  The format of the IsImageOpaque method is:
%
%      MagickBooleanType IsImageOpaque(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 IsImageOpaque(const Image *image,
  ExceptionInfo *exception)
{
  CacheView
    *image_view;

  register const Quantum
    *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->alpha_trait != BlendPixelTrait)
    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 Quantum *) NULL)
      break;
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      if (GetPixelAlpha(image,p) != OpaqueAlpha)
        break;
      p+=GetPixelChannels(image);
    }
    if (x < (ssize_t) image->columns)
     break;
  }
  image_view=DestroyCacheView(image_view);
  return(y < (ssize_t) image->rows ? MagickFalse : MagickTrue);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%     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;

  long
    y;

  register const PixelPacket
    *p;

  register long
    x;

  /*
    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=AcquireCacheView(image);
  for (y=0; y < (long) image->rows; y++)
  {
    p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
    if (p == (const PixelPacket *) NULL)
      break;
    for (x=0; x < (long) image->columns; x++)
    {
      if (p->opacity != OpaqueOpacity)
        break;
      p++;
    }
    if (x < (long) image->columns)
     break;
  }
  image_view=DestroyCacheView(image_view);
  return(y < (long) image->rows ? MagickFalse : MagickTrue);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   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;

  PixelInfo
    target[3],
    zero;

  RectangleInfo
    bounds;

  register const Quantum
    *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;
  GetPixelInfo(image,&target[0]);
  image_view=AcquireVirtualCacheView(image,exception);
  p=GetCacheViewVirtualPixels(image_view,0,0,1,1,exception);
  if (p == (const Quantum *) NULL)
    {
      image_view=DestroyCacheView(image_view);
      return(bounds);
    }
  GetPixelInfoPixel(image,p,&target[0]);
  GetPixelInfo(image,&target[1]);
  p=GetCacheViewVirtualPixels(image_view,(ssize_t) image->columns-1,0,1,1,
    exception);
  GetPixelInfoPixel(image,p,&target[1]);
  GetPixelInfo(image,&target[2]);
  p=GetCacheViewVirtualPixels(image_view,0,(ssize_t) image->rows-1,1,1,
    exception);
  GetPixelInfoPixel(image,p,&target[2]);
  status=MagickTrue;
  GetPixelInfo(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++)
  {
    PixelInfo
      pixel;

    RectangleInfo
      bounding_box;

    register const Quantum
      *restrict p;

    register ssize_t
      x;

    if (status == MagickFalse)
      continue;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#  pragma omp critical (MagickCore_GetImageBoundingBox)
#endif
//.........这里部分代码省略.........

// Destroy pixel view
Magick::Pixels::~Pixels( void )
{
  if ( _view )
    _view = DestroyCacheView( _view );
  
}

//.........这里部分代码省略.........

          q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
            &image->exception);
          if (q == (PixelPacket *) NULL)
            break;
          for (x=0; x < (long) image->columns; x++)
          {
            px=(*q);
            qx[0]=&(q->red);
            qx[1]=&(q->green);
            qx[2]=&(q->blue);
            for (i=0; i < 3; i++)
              switch (quantum_types[i])
              {
                case RedQuantum:   *qx[i]=px.red;   break;
                case GreenQuantum: *qx[i]=px.green; break;
                case BlueQuantum:  *qx[i]=px.blue;  break;
                default:                            break;
              }
            q++;
          }
          length=ExportQuantumPixels(image,image_view,quantum_info,quantum_type,
            pixels,&image->exception);
          count=WriteBlob(image,length,pixels);
          if (count != (ssize_t) length)
            break;
          if (image->previous == (Image *) NULL)
            {
              status=SetImageProgress(image,SaveImageTag,y,image->rows);
              if (status == MagickFalse)
                break;
            }
        }
        image_view=DestroyCacheView(image_view);
        break;
      }
      case LineInterlace:
      {
        /*
          Line interlacing:  RRR...GGG...BBB...RRR...GGG...BBB...
        */
        for (y=0; y < (long) image->rows; y++)
        {
          register const PixelPacket
            *__restrict p;

          p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
          if (p == (const PixelPacket *) NULL)
            break;
          for (i=0; i < (long) channels; i++)
          {
            length=ExportQuantumPixels(image,(const CacheView *) NULL,
              quantum_info,quantum_types[i],pixels,&image->exception);
            count=WriteBlob(image,length,pixels);
            if (count != (ssize_t) length)
              break;
          }
          if (image->previous == (Image *) NULL)
            {
              status=SetImageProgress(image,SaveImageTag,y,image->rows);
              if (status == MagickFalse)
                break;
            }
        }
        break;
      }

Magick::Pixels::~Pixels(void)
{
  if (_view != (MagickCore::CacheView *) NULL)
    _view=DestroyCacheView(_view);
}

//.........这里部分代码省略.........
        {
          oy=object;
          status=GetMatrixElement(equivalences,oy,0,&object);
        }
        if (ox < oy)
          {
            status=SetMatrixElement(equivalences,oy,0,&ox);
            root=ox;
          }
        else
          {
            status=SetMatrixElement(equivalences,ox,0,&oy);
            root=oy;
          }
        ox=offset;
        status=GetMatrixElement(equivalences,ox,0,&object);
        while (object != root)
        {
          status=GetMatrixElement(equivalences,ox,0,&object);
          status=SetMatrixElement(equivalences,ox,0,&root);
        }
        oy=offset+neighbor_offset;
        status=GetMatrixElement(equivalences,oy,0,&object);
        while (object != root)
        {
          status=GetMatrixElement(equivalences,oy,0,&object);
          status=SetMatrixElement(equivalences,oy,0,&root);
        }
        status=SetMatrixElement(equivalences,y*image->columns+x,0,&root);
        p+=GetPixelChannels(image);
      }
    }
  }
  image_view=DestroyCacheView(image_view);
  /*
    Label connected components.
  */
  n=0;
  image_view=AcquireVirtualCacheView(image,exception);
  component_view=AcquireAuthenticCacheView(component_image,exception);
  for (y=0; y < (ssize_t) component_image->rows; y++)
  {
    register const Quantum
      *magick_restrict p;

    register Quantum
      *magick_restrict q;

    register ssize_t
      x;

    if (status == MagickFalse)
      continue;
    p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
    q=QueueCacheViewAuthenticPixels(component_view,0,y,component_image->columns,
      1,exception);
    if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
      {
        status=MagickFalse;
        continue;
      }
    for (x=0; x < (ssize_t) component_image->columns; x++)
    {
      ssize_t
        id,
        offset;