[Magick-bugs] About Imagemagik++ Problem

[Anu Singla]

Hello,

We are running into a problem and we are wondering if you have solution for
this.
We have used Imagemagik++  in our application. We are using it in Asp.Net.
We wrote a wrapper in c++/CLR so that we can use this in our web
application.
To calculate  pixel count (By Image Magik) we are using the code snippet as
below:

double ImageMagikWrapper::MagicHelper::WhiteRatio(System::String^ str)
{

    // Atomic locked increment for initialization of this library.
    if(System::Threading::Interlocked::Increment(init__) == 1)
  {
    Magick::InitializeMagick(NULL);
  }

double retVal = 0.0;
std::string filename;
MagicHelper::MarshalString(str, filename);
Magick::Image img;
HistogramMap histogram;

try {
        img.read(filename);
        filename = filename.replace(filename.rfind(".pdf",
filename.length()),4,".gif");
        Magick::Blob gifFile;
        img.magick("GIF");
        img.write(&gifFile);
        Image gifImg;
        gifImg.read(gifFile);
        colorHistogram(&histogram, gifImg);
    }

catch(...)
{
        return ErrorValue;
}

// Code here.
unsigned long nonWhiteCount = 0;
unsigned long whiteCount = 0;
double div = 0;
double whitePercentage = 0;

for(HistogramMap::iterator iter = histogram.begin(); iter !=
histogram.end(); ++iter)
 {
        Quantum qRed = iter->first.redQuantum();
        Quantum qGreen = iter->first.greenQuantum();
        Quantum qBlue = iter->first.blueQuantum();

     if(whiteCount==0 && qRed == 65535 && qGreen==65535 && qBlue==65535)
        whiteCount=(unsigned long)iter->second;
    else
        nonWhiteCount+=(unsigned long)iter->second;
}

unsigned long total=whiteCount+nonWhiteCount;
div=(double)whiteCount/(double)total;
retVal=div*100;
return retVal;
}

// Helper to convert C# string to C++ std::string

void ImageMagikWrapper::MagicHelper::MarshalString (System::String ^ s,
std::string& os )
{
    using namespace System::Runtime::InteropServices;
    const char* chars = (const
char*)(Marshal::StringToHGlobalAnsi(s)).ToPointer();
    os = chars;
    Marshal::FreeHGlobal(System::IntPtr((void*)chars));
}

It is working fine when we are running it on one web application. But When
we try to run it on two web application simultaneously it is giving an error
as:

System.TypeInitializationException: The type initializer for '<Module>'
threw an exception. --->
System.TypeInitializationException: The type initializer for '<Module>'
threw an exception. ---> <CrtImplementationDetails>.ModuleLoadException:
The C++ module failed to load. --->
<CrtImplementationDetails>.OpenMPWithMultipleAppdomainsException: Exception
of type '<CrtImplementationDetails>.OpenMPWithMultipleAppdomainsException'
was thrown.
   at <CrtImplementationDetails>.DoDllLanguageSupportValidation()
   at
<CrtImplementationDetails>.LanguageSupport._Initialize(LanguageSupport* )
   at <CrtImplementationDetails>.LanguageSupport.Initialize(LanguageSupport*
)
   --- End of inner exception stack trace ---
   at <CrtImplementationDetails>.ThrowModuleLoadException(String
errorMessage, Exception innerException)
   at <CrtImplementationDetails>.LanguageSupport.Initialize(LanguageSupport*
)
   at .cctor()
   --- End of inner exception stack trace ---
   at <CrtImplementationDetails>.ThrowModuleLoadException(String , Exception
)
   at <CrtImplementationDetails>.LanguageSupport.Initialize(LanguageSupport*
)
   at .cctor()
   --- End of inner exception stack trace ---
   at
JustPrintCWI.SourceCode.Controller.WhiteRatioPercentage.CalculateWhitePercentage(String
filename)
   at app_UploadFile.doUploadPDF(Decimal toUploadFileSize, String filename,
String filepath, String savefilename, Decimal foldersize)
   at app_UploadFile.btnUpload_Click(Object sender, ImageClickEventArgs e)
   at System.Web.UI.WebControls.ImageButton.OnClick(ImageClickEventArgs e)
   at System.Web.UI.WebControls.ImageButton.RaisePostBackEvent(String
eventArgument)
   at
System.Web.UI.WebControls.ImageButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String
eventArgument)
   at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler
sourceControl, String eventArgument)
   at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
   at System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Please give us the workaround for this problem. We are into mid of the
project.
Thanks a lot in advance.


Thanks & Regards
Anu Singla
S/W Developer
Aquevix Solutions Pvt.Ltd.