Legacy ImageMagick Discussions Archive

Greetings.
I am wondering if it is possible to access packed raw pixel information using MagickWand.

The following code does what I want when using MagickCore. It gets a pointer to a row of packed pixel data stored in an array or PixelPackets (and IndexPackets).

Code: Select all

  PixelPacket *pixels; IndexPacket *index_pixels;
  ImageInfo *image_info; ExceptionInfo *exception_info;
  Image *image;
  
  // Generate
  MagickCoreGenesis(*argv,MagickTrue);
  if (IsMagickCoreInstantiated() != MagickTrue)
    return -1;
  image_info = AcquireImageInfo();
  GetImageInfo(image_info);
  exception_info = AcquireExceptionInfo();
  GetExceptionInfo(exception_info);

  // Read image
  CopyMagickString(image_info->filename,fname,MaxTextExtent);
  image = ReadImage(image_info,exception_info);

  // Get read only pixels
  pixels = GetVirtualPixels(image,(ssize_t)0,(ssize_t)row,(size_t)cols,(size_t)1,exception_info);
  if (pixels == (const PixelPacket *) NULL)
    // Throw error
  if (image->colorspace == CMYKColorspace)
    {
      index_pixels = GetVirtualIndexQueue(image);
      if (index_pixels == (const IndexPacket *) NULL)
        // Throw error
    }
  ...

I am wondering if it's possible to do the same using MagickWand. Using PixelWands doesn't really get me what I need, since the PixelWands are big, contain information I do not need and are not necessarily next to each other.

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  PixelWand **pixel_wands;
  size_t read;

  PixelIterator *pixel_iterator = NewPixelIterator(some_wand...);
  pixel_wands = PixelGetNextIteratorRow(pixel_iterator,&read);

Do I need to stick to MagickCore or is it somehow possible?