compilation error

[udayk82]

Hi Friends,
I am facing a problem in compiling and executing a c program which uses ImageMagick.h header file. It compiled without any error, but while executing the code i get the following error message..

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example1: coders/jpeg.c:679: ReadJPEGImage: Assertion `exception->signature == 0xabacadabUL' failed.
Aborted

To give complete information, the program is written just to check the utility of ImageMagick..

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Image *image;

      ImageInfo image_info;

      ExceptionInfo *exception;

      /*
        Initialize the image info structure and read an image.
      */
      GetImageInfo(&image_info);
      (void) strcpy(image_info.filename,"image.jpg");
      image=ReadImage(&image_info,exception);
      if (image == (Image *) NULL)
        exit(1);

Did anybody face this problem before??

[anthony]

It means the structure you gave to the IM library was NOT the structure it was expecting.

[el_supremo]

"exception" is an uninitialized pointer.
You can declare, initialize and use it like this:

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ExceptionInfo exception;

GetExceptionInfo(&exception);
image=ReadImage(&image_info,&exception);

Pete

[magick]

The newer preferred way to handle exceptions:

ExceptionInfo *exception;
exception=AcquireExceptionInfo();
image=ReadImage(ImageInfo,exception);
...
exception=DestroyExceptionInfo(exception);

[anthony]

That better be put in the architecture document.

Along with any changes to the whey a function should handle colors, and specifically
the CMYK black channel and alpha channel.