Legacy ImageMagick Discussions Archive

Hello,

I'm just using Magick++ to convert an in memory Jpeg2000 image to a bitmap. The conversion functions correctly, but when the method returns, VStudio throws a debug assertion stating an invalid address specified for RtlValidateHeap(). Looking at the call trace, this occurs inside the CORE_DB_Magick++_.dll when calling the delete operator.

The code I'm using is pretty simple, and is below.

Code: Select all

void imageproc( void* pdata, size_t size )
{
  Image image;
  Blob in_b, out_b;

  // initialise magick
  Initializemagick( NULL );

  // assign data to a blob
  in_b.updateNoCopy( pdata, size );

  // read the bloc data into an image object, set the new format, and write to the output blob
  try {
    image.read( in_b );
    image.magick( "bmp" );
    image.write( &out_b );
  }
  catch( Error& error ) {
    ...
    return;
  }
}

The code above is simplified, but should work. It works fine in terms of correctly putting a bitmap image into the output blob, but then causing a heap error when the function returns. Is there any cleanup i should be doing with the image object?

Thanks for any help,
Rob Smith

just to update, i've also tried creating the image object on the stack, instead of using the heap, and the heap error occurs when calling delete on the Makick::Image object. Can any developers help?

Code: Select all

void imageproc( void* pdata, size_t size )
{
  Image* image = new Image;
  Blob in_b, out_b;

  // initialise magick
  Initializemagick( NULL );

  // assign data to a blob
  in_b.updateNoCopy( pdata, size );

  // read the bloc data into an image object, set the new format, and write to the output blob
  try {
    image->read( in_b );
    image->magick( "bmp" );
    image->write( &out_b );
  }
  catch( Error& error ) {
    ...
    return;
  }

  // clearup
  delete image;  -  this causes windows to trigger a breakpoint
}

Legacy ImageMagick Discussions Archive

windows Heap problems using Magick++

windows Heap problems using Magick++

Re: windows Heap problems using Magick++