C++ AcquireMagickMemory函數代碼示例

Magick::Options::Options(void)
  : _imageInfo(static_cast<ImageInfo*>(AcquireMagickMemory(
      sizeof(ImageInfo)))),
    _quantizeInfo(static_cast<QuantizeInfo*>(AcquireMagickMemory(
      sizeof(QuantizeInfo)))),
    _drawInfo(static_cast<DrawInfo*>(AcquireMagickMemory(sizeof(DrawInfo)))),
    _quiet(false)
{
  // Initialize image info with defaults
  GetImageInfo(_imageInfo);

  // Initialize quantization info
  GetQuantizeInfo(_quantizeInfo);

  // Initialize drawing info
  GetDrawInfo(_imageInfo,_drawInfo);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   N e w P i x e l R e g i o n I t e r a t o r                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  NewPixelRegionIterator() returns a new pixel iterator.
%
%  The format of the NewPixelRegionIterator method is:
%
%      PixelIterator *NewPixelRegionIterator(MagickWand *wand,const ssize_t x,
%        const ssize_t y,const size_t width,const size_t height)
%
%  A description of each parameter follows:
%
%    o wand: the magick wand.
%
%    o x,y,columns,rows:  These values define the perimeter of a region of
%      pixels.
%
*/
WandExport PixelIterator *NewPixelRegionIterator(MagickWand *wand,
  const ssize_t x,const ssize_t y,const size_t width,const size_t height)
{
  CacheView
    *view;

  const char
    *quantum;

  ExceptionInfo
    *exception;

  Image
    *image;

  PixelIterator
    *iterator;

  size_t
    depth;

  assert(wand != (MagickWand *) NULL);
  depth=MAGICKCORE_QUANTUM_DEPTH;
  quantum=GetMagickQuantumDepth(&depth);
  if (depth != MAGICKCORE_QUANTUM_DEPTH)
    ThrowWandFatalException(WandError,"QuantumDepthMismatch",quantum);
  if ((width == 0) || (width == 0))
    ThrowWandFatalException(WandError,"ZeroRegionSize",quantum);
  image=GetImageFromMagickWand(wand);
  if (image == (Image *) NULL)
    return((PixelIterator *) NULL);
  exception=AcquireExceptionInfo();
  view=AcquireVirtualCacheView(image,exception);
  if (view == (CacheView *) NULL)
    return((PixelIterator *) NULL);
  iterator=(PixelIterator *) AcquireMagickMemory(sizeof(*iterator));
  if (iterator == (PixelIterator *) NULL)
    ThrowWandFatalException(ResourceLimitFatalError,"MemoryAllocationFailed",
      wand->name);
  (void) ResetMagickMemory(iterator,0,sizeof(*iterator));
  iterator->id=AcquireWandId();
  (void) FormatLocaleString(iterator->name,MaxTextExtent,"%s-%.20g",
    PixelIteratorId,(double) iterator->id);
  iterator->exception=exception;
  iterator->view=view;
  SetGeometry(image,&iterator->region);
  iterator->region.width=width;
  iterator->region.height=height;
  iterator->region.x=x;
  iterator->region.y=y;
  iterator->pixel_wands=NewPixelWands(iterator->region.width);
  iterator->y=0;
  iterator->debug=IsEventLogging();
  if (iterator->debug != MagickFalse)
    (void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
  iterator->signature=WandSignature;
  return(iterator);
}

MAGICK_NET_EXPORT unsigned short *PixelCollection_ToShortArray(const CacheView *instance, const size_t x, const size_t y, const size_t width, const size_t height, const char *mapping, ExceptionInfo **exception)
{
  ExportStart(unsigned short);
  result = AcquireMagickMemory(length);
  MAGICK_NET_GET_EXCEPTION;
  ExportImagePixels(GetCacheViewImage(instance), x, y, width, height, mapping, ShortPixel, result, exceptionInfo);
  MAGICK_NET_SET_EXCEPTION;
  return result;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   A c q u i r e Q u a n t u m M e m o r y                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  AcquireQuantumMemory() returns a pointer to a block of memory at least
%  count * quantum bytes suitably aligned for any use.
%
%  The format of the AcquireQuantumMemory method is:
%
%      void *AcquireQuantumMemory(const size_t count,const size_t quantum)
%
%  A description of each parameter follows:
%
%    o count: the number of quantum elements to allocate.
%
%    o quantum: the number of bytes in each quantum.
%
*/
MagickExport void *AcquireQuantumMemory(const size_t count,const size_t quantum)
{
  size_t
    extent;

  if (CheckMemoryOverflow(count,quantum) != MagickFalse)
    return((void *) NULL);
  extent=count*quantum;
  return(AcquireMagickMemory(extent));
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   A c q u i r e V i r t u a l M e m o r y                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  AcquireVirtualMemory() allocates a pointer to a block of memory at least size
%  bytes suitably aligned for any use.
%
%  The format of the AcquireVirtualMemory method is:
%
%      MemoryInfo *AcquireVirtualMemory(const size_t count,const size_t quantum)
%
%  A description of each parameter follows:
%
%    o count: the number of quantum elements to allocate.
%
%    o quantum: the number of bytes in each quantum.
%
*/
MagickExport MemoryInfo *AcquireVirtualMemory(const size_t count,
  const size_t quantum)
{
  MemoryInfo
    *memory_info;

  size_t
    length;

  length=count*quantum;
  if ((count == 0) || (quantum != (length/count)))
    {
      errno=ENOMEM;
      return((void *) NULL);
    }
  memory_info=(MemoryInfo *) MagickAssumeAligned(AcquireAlignedMemory(1,
    sizeof(*memory_info)));
  if (memory_info == (MemoryInfo *) NULL)
    ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
  (void) ResetMagickMemory(memory_info,0,sizeof(*memory_info));
  memory_info->length=length;
  memory_info->signature=MagickSignature;
  memory_info->blob=AcquireMagickMemory(length);
  if (memory_info->blob == NULL)
    {
      /*
        Heap memory failed, try anonymous memory mapping.
      */
      memory_info->mapped=MagickTrue;
      memory_info->blob=MapBlob(-1,IOMode,0,length);
    }
  if (memory_info->blob == NULL)
    {
      int
        file;

      /*
        Anonymous memory mapping failed, try file-backed memory mapping.
      */
      file=AcquireUniqueFileResource(memory_info->filename);
      file=open_utf8(memory_info->filename,O_RDWR | O_CREAT | O_BINARY | O_EXCL,
        S_MODE);
      if (file == -1)
        file=open_utf8(memory_info->filename,O_RDWR | O_BINARY,S_MODE);
      if (file != -1)
        {
          if ((lseek(file,length-1,SEEK_SET) >= 0) && (write(file,"",1) == 1))
            memory_info->blob=MapBlob(file,IOMode,0,length);
          (void) close(file);
        }
    }
  if (memory_info->blob == NULL)
    return(RelinquishVirtualMemory(memory_info));
  return(memory_info);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   A c q u i r e T o k e n I n f o                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  AcquireTokenInfo() allocates the TokenInfo structure.
%
%  The format of the AcquireTokenInfo method is:
%
%      TokenInfo *AcquireTokenInfo()
%
*/
MagickExport TokenInfo *AcquireTokenInfo(void)
{
  TokenInfo
    *token_info;

  token_info=(TokenInfo *) AcquireMagickMemory(sizeof(*token_info));
  if (token_info == (TokenInfo *) NULL)
    ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
  token_info->signature=MagickCoreSignature;
  return(token_info);
}

MAGICK_NET_EXPORT GeometryInfo *MagickGeometry_Create(void)
{
  GeometryInfo
    *geometry_info;

  geometry_info = (GeometryInfo *)AcquireMagickMemory(sizeof(*geometry_info));
  if (geometry_info == (GeometryInfo *)NULL)
    return (GeometryInfo *)NULL;
  ResetMagickMemory(geometry_info, 0, sizeof(*geometry_info));
  return geometry_info;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   N e w P i x e l R e g i o n I t e r a t o r                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  NewPixelRegionIterator() returns a new pixel iterator.
%
%  The format of the NewPixelRegionIterator method is:
%
%      PixelIterator NewPixelRegionIterator(MagickWand *wand,const long x,
%        const long y,const unsigned long columns,const unsigned long rows,
%        const MagickBooleanType modify)
%
%  A description of each parameter follows:
%
%    o wand: the magick wand.
%
%    o x,y,columns,rows:  These values define the perimeter of a region of
%      pixels.
%
*/
WandExport PixelIterator *NewPixelRegionIterator(MagickWand *wand,const long x,
  const long y,const unsigned long columns,const unsigned long rows)
{
  const char
    *quantum;

  Image
    *image;

  PixelIterator
    *iterator;

  unsigned long
    depth;

  ViewInfo
    *view;

  assert(wand != (MagickWand *) NULL);
  depth=MAGICKCORE_QUANTUM_DEPTH;
  quantum=GetMagickQuantumDepth(&depth);
  if (depth != MAGICKCORE_QUANTUM_DEPTH)
    ThrowWandFatalException(WandError,"QuantumDepthMismatch",quantum);
  if ((columns == 0) || (rows == 0))
    ThrowWandFatalException(WandError,"ZeroRegionSize",quantum);
  image=GetImageFromMagickWand(wand);
  if (image == (Image *) NULL)
    return((PixelIterator *) NULL);
  view=OpenCacheView(image);
  if (view == (ViewInfo *) NULL)
    return((PixelIterator *) NULL);
  iterator=(PixelIterator *) AcquireMagickMemory(sizeof(*iterator));
  if (iterator == (PixelIterator *) NULL)
    ThrowWandFatalException(ResourceLimitFatalError,"MemoryAllocationFailed",
      wand->name);
  (void) ResetMagickMemory(iterator,0,sizeof(*iterator));
  iterator->id=AcquireWandId();
  (void) FormatMagickString(iterator->name,MaxTextExtent,"%s-%lu",
    PixelIteratorId,iterator->id);
  iterator->exception=AcquireExceptionInfo();
  iterator->view=view;
  SetGeometry(image,&iterator->region);
  iterator->region.width=columns;
  iterator->region.height=rows;
  iterator->region.x=x;
  iterator->region.y=y;
  iterator->pixel_wands=NewPixelWands(iterator->region.width);
  iterator->y=0;
  iterator->debug=IsEventLogging();
  if (iterator->debug != MagickFalse)
    (void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
  iterator->signature=WandSignature;
  return(iterator);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   M a g i c k Q u e r y M u l t i l i n e F o n t M e t r i c s             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  MagickQueryMultilineFontMetrics() returns a 7 element array representing the
%  following font metrics:
%
%    Element Description
%    -------------------------------------------------
%          0 character width
%          1 character height
%          2 ascender
%          3 descender
%          4 text width
%          5 text height
%          6 maximum horizontal advance
%
%  This method is like MagickQueryFontMetrics() but it returns the maximum text
%  width and height for multiple lines of text.
%
%  The format of the MagickQueryFontMetrics method is:
%
%      double *MagickQueryMultilineFontMetrics(MagickWand *wand,
%        const DrawingWand *drawing_wand,const char *text)
%
%  A description of each parameter follows:
%
%    o wand: The Magick wand.
%
%    o drawing_wand: The drawing wand.
%
%    o text: The text.
%
*/
WandExport double *MagickQueryMultilineFontMetrics(MagickWand *wand,
  const DrawingWand *drawing_wand,const char *text)
{
  double
    *font_metrics;

  DrawInfo
    *draw_info;

  MagickBooleanType
    status;

  TypeMetric
    metrics;

  assert(wand != (MagickWand *) NULL);
  assert(wand->signature == MagickSignature);
  if (wand->debug != MagickFalse)
    (void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",wand->name);
  assert(drawing_wand != (const DrawingWand *) NULL);
  if (wand->images == (Image *) NULL)
    {
      (void) ThrowMagickException(&wand->exception,GetMagickModule(),WandError,
        "ContainsNoImages","`%s'",wand->name);
      return((double *) NULL);
    }
  font_metrics=(double *) AcquireMagickMemory(7*sizeof(*font_metrics));
  if (font_metrics == (double *) NULL)
    return((double *) NULL);
  draw_info=PeekDrawingWand(drawing_wand);
  if (draw_info == (DrawInfo *) NULL)
    {
      font_metrics=(double *) RelinquishMagickMemory(font_metrics);
      return((double *) NULL);
    }
  (void) CloneString(&draw_info->text,text);
  (void) ResetMagickMemory(&metrics,0,sizeof(metrics));
  status=GetMultilineTypeMetrics(wand->images,draw_info,&metrics);
  draw_info=DestroyDrawInfo(draw_info);
  if (status == MagickFalse)
    {
      InheritException(&wand->exception,&wand->images->exception);
      font_metrics=(double *) RelinquishMagickMemory(font_metrics);
      return((double *) NULL);
    }
  font_metrics[0]=metrics.pixels_per_em.x;
  font_metrics[1]=metrics.pixels_per_em.y;
  font_metrics[2]=metrics.ascent;
  font_metrics[3]=metrics.descent;
  font_metrics[4]=metrics.width;
  font_metrics[5]=metrics.height;
  font_metrics[6]=metrics.max_advance;
  return(font_metrics);
}

void *
magick_malloc(const size_t size)
{
    void *ptr;
    ptr = AcquireMagickMemory(size);
    if (!ptr)
    {
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }

    return ptr;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   M a g i c k C r e a t e T h r e a d K e y                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  MagickCreateThreadKey() creates a thread key and returns it.
%
%  The format of the MagickCreateThreadKey method is:
%
%      MagickThreadKey MagickCreateThreadKey(MagickThreadKey *key)
%
*/
MagickExport MagickBooleanType MagickCreateThreadKey(MagickThreadKey *key)
{
#if defined(MAGICKCORE_THREAD_SUPPORT)
  return(pthread_key_create(key,NULL) == 0 ? MagickTrue : MagickFalse);
#elif defined(MAGICKCORE_HAVE_WINTHREADS)
  *key=TlsAlloc();
  return(*key != TLS_OUT_OF_INDEXES ? MagickTrue : MagickFalse);
#else
  *key=AcquireMagickMemory(sizeof(key));
  return(*key != (void *) NULL ? MagickTrue : MagickFalse);
#endif
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e s i z e M a g i c k M e m o r y                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ResizeMagickMemory() changes the size of the memory and returns a pointer to
%  the (possibly moved) block.  The contents will be unchanged up to the
%  lesser of the new and old sizes.
%
%  The format of the ResizeMagickMemory method is:
%
%      void *ResizeMagickMemory(void *memory,const size_t size)
%
%  A description of each parameter follows:
%
%    o memory: A pointer to a memory allocation.  On return the pointer
%      may change but the contents of the original allocation will not.
%
%    o size: The new size of the allocated memory.
%
%
*/
WandExport void *ResizeMagickMemory(void *memory,const size_t size)
{
  void
    *allocation;

  if (memory == (void *) NULL)
    return(AcquireMagickMemory(size));
  allocation=realloc(memory,size);
  if (allocation == (void *) NULL)
    (void) RelinquishMagickMemory(memory);
  return(allocation);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   A c q u i r e E x c e p t i o n I n f o                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  AcquireExceptionInfo() allocates the ExceptionInfo structure.
%
%  The format of the AcquireExceptionInfo method is:
%
%      ExceptionInfo *AcquireExceptionInfo(void)
%
*/
MagickExport ExceptionInfo *AcquireExceptionInfo(void)
{
  ExceptionInfo
    *exception;

  exception=(ExceptionInfo *) AcquireMagickMemory(sizeof(*exception));
  if (exception == (ExceptionInfo *) NULL)
    ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
  GetExceptionInfo(exception);
  exception->relinquish=MagickTrue;
  return(exception);
}

void Magick::PixelData::init(Magick::Image &image_,const ::ssize_t x_,
  const ::ssize_t y_,const size_t width_,const size_t height_,
  std::string map_,const StorageType type_)
{
  size_t
    size;

  _data=(void *) NULL;
  _length=0;
  _size=0;
  if ((x_ < 0) || (width_ == 0) || (y_ < 0) || (height_ == 0) ||
      (x_ > image_.columns()) || ((width_ + x_) > image_.columns())
      || (y_ > image_.rows()) || ((height_ + y_) > image_.rows())
      || (map_.length() == 0))
    return;

  switch(type_)
  {
    case CharPixel:
      size=sizeof(unsigned char);
      break;
    case DoublePixel:
      size=sizeof(double);
      break;
    case FloatPixel:
      size=sizeof(float);
      break;
    case IntegerPixel:
    case LongPixel:
      size=sizeof(unsigned int);
      break;
    case QuantumPixel:
      size=sizeof(Quantum);
      break;
    case ShortPixel:
      size=sizeof(unsigned short);
      break;
    default:
      throwExceptionExplicit(OptionError,"Invalid type");
      return;
  }

  _length=width_*height_*map_.length();
  _size=_length*size;
  _data=AcquireMagickMemory(_size);

  GetPPException;
  MagickCore::ExportImagePixels(image_.constImage(),x_,y_,width_,height_,
    map_.c_str(),type_,_data,exceptionInfo);
  if (exceptionInfo->severity != UndefinedException)
    relinquish();
  ThrowPPException(image_.quiet());
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   A c q u i r e Q u a n t u m M e m o r y                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  AcquireQuantumMemory() returns a pointer to a block of memory at least
%  count * quantum bytes suitably aligned for any use.
%
%  The format of the AcquireQuantumMemory method is:
%
%      void *AcquireQuantumMemory(const size_t count,const size_t quantum)
%
%  A description of each parameter follows:
%
%    o count: the number of quantum elements to allocate.
%
%    o quantum: the number of bytes in each quantum.
%
*/
MagickExport void *AcquireQuantumMemory(const size_t count,const size_t quantum)
{
  size_t
    size;

  size=count*quantum;
  if ((count == 0) || (quantum != (size/count)))
    {
      errno=ENOMEM;
      return((void *) NULL);
    }
  return(AcquireMagickMemory(size));
}