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/* $Id$ */

/* //////////////////////////////////////////////////////////////////////////

//                                                                         //

// This code is Copyright (c) 2004 LizardTech, Inc, 1008 Western Avenue,   //

// Suite 200, Seattle, WA 98104.  Unauthorized use or distribution         //

// prohibited.  Access to and use of this code is permitted only under     //

// license from LizardTech, Inc.  Portions of the code are protected by    //

// US and foreign patents and other filings. All Rights Reserved.          //

//                                                                         //

////////////////////////////////////////////////////////////////////////// */

/* PUBLIC */

#ifndef LTI_CROPFILTER_H

#define LTI_CROPFILTER_H

// lt_lib_mrsid_core

#include "lti_imageFilter.h"

LT_BEGIN_NAMESPACE(LizardTech)

#if defined(LT_COMPILER_MS)

   #pragma warning(push,4)

#endif

/**

 * crops the image stage to a smaller width and height

 *

 * This class crops the image stage to a smaller width and height.

 */

class LTICropFilter : public LTIImageFilter

{

public:

   /**

    * constructor

    *

    * Creates an image stage which corresponds to a cropped subsection of the

    * input image, according to the given offset, width, and height.

    *

    * @param  sourceImage    the base image

    * @param  xOffset        x-position of the origin of the new image

    *                        (specified relative to the input image)

    * @param  yOffset        y-position of the origin of the new image

    *                        (specified relative to the input image)

    * @param  newWidth       width of the new image

    * @param  newHeight      height of the new image

    * @param  takeOwnership  set to true to have the filter delete the \a sourceImage

    */

   LTICropFilter(LTIImageStage* sourceImage,

                 lt_int32 xOffset,

                 lt_int32 yOffset,

                 lt_int32 newWidth,

                 lt_int32 newHeight,

                 bool takeOwnership);

   virtual ~LTICropFilter();

   virtual LT_STATUS initialize();

   LT_STATUS projectPointAtMag(double upperLeft,

                               double mag,

                               double& newUpperLeft) const;

   LT_STATUS projectDimAtMag(double dim,

                             double mag,

                             double& newDim) const;

   LT_STATUS getDimsAtMag(double mag,

                          lt_uint32& width,

                          lt_uint32& height) const;

   bool getReaderScene(const LTIScene &decodeScene, LTIScene &readerScene) const;

protected:

   LT_STATUS decodeBegin(const LTIScene& scene);

   LT_STATUS decodeEnd();

   LT_STATUS decodeStrip(LTISceneBuffer& stripBuffer, const LTIScene& stripScene);

   LT_STATUS getChildScene(const LTIScene &decodeScene, LTIScene &childScene) const;

private:

   typedef LTIImageFilter Super;

   const lt_int32 m_xOffset;

   const lt_int32 m_yOffset;

   const lt_int32 m_newWidth;

   const lt_int32 m_newHeight;

   // nope

   LTICropFilter(const LTICropFilter&);

   LTICropFilter& operator=(const LTICropFilter&);

};

LT_END_NAMESPACE(LizardTech)

#if defined(LT_COMPILER_MS)

        #pragma warning(pop)

#endif

#endif // LTI_CROPFILTER_H