cxfrgshp.cpp

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// $Id: cxfrgshp.cpp 1282 2006-06-09 09:46:49Z alex $
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/********************************************************************************************

>   cxfrgshp.cpp

    Author:     Andy_Hayward (Xara Group Ltd) <camelotdev@xara.com>
    Created:    04/06/96
    Purpose:    Base class holding code for exporting regular shapes to the new file format
    SeeAlso:    Class NodeRegularShape

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

#include "camtypes.h"

//#include "doccoord.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "paths.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "nodershp.h"
#include "cxftags.h"
//#include "cxfdefs.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "camfiltr.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "cxfile.h"
//#include "cxfrec.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "cxfrgshp.h"
#include "cxfellp.h"
#include "cxfrect.h"
#include "cxfpoly.h"

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

>   BOOL CXaraFileRegularShape::WritePreChildrenNative(BaseCamelotFilter * pFilter, NodeRegularShape *pShape)
    BOOL CXaraFileRegularShape::WritePreChildrenWeb(BaseCamelotFilter * pFilter, NodeRegularShape *pShape)

    Author:     Andy_Hayward (Xara Group Ltd) <camelotdev@xara.com>
    Created:    04/06/96
    Inputs:     pFilter - filter to save this shape to
                pShape  - regular shape to save
    Returns:    boolean value indicating success of writing record
    Purpose:    Writes a regular shape to the filter in native or web format

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

BOOL CXaraFileRegularShape::WritePreChildrenNative(BaseCamelotFilter * pFilter, NodeRegularShape *pShape)
{
    ERROR2IF(pFilter == NULL, FALSE, "Argument pFilter == NULL.");
    ERROR2IF(pShape == NULL, FALSE, "Argument pShape == NULL.");

    // Due to last minute changes, of course after the spec was approved, we now use this for native
    // and the pants web files. There is a new flag to say if we are doing a compact native AKA the web file 
    // half way between the true web file and the full native file.
    if (pFilter->IsCompactNativeFilter() || pFilter->WriteSpecificRegularShapes())
        return WriteShapeWeb(pFilter, pShape);

    return WriteShapeNative(pFilter, pShape);
}

BOOL CXaraFileRegularShape::WritePreChildrenWeb(BaseCamelotFilter * pFilter, NodeRegularShape *pShape)
{
    ERROR2IF(pFilter == NULL, FALSE, "Argument pFilter == NULL.");
    ERROR2IF(pShape == NULL, FALSE, "Argument pShape == NULL.");

    return WriteShapeWeb(pFilter, pShape);
}

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

>   BOOL CXaraFileRegularShape::WriteShapeNative(BaseCamelotFilter * pFilter, NodeRegularShape *pShape)
    BOOL CXaraFileRegularShape::WriteShapeWeb(BaseCamelotFilter * pFilter, NodeRegularShape *pShape)

    Author:     Andy_Hayward (Xara Group Ltd) <camelotdev@xara.com>
    Created:    04/06/96
    Inputs:     pFilter - filter to use
                pShape  - regular shape to save out
    Returns:    boolean value indicating success of writing record
    Purpose:    Writes a regular shape record to the filter

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

BOOL CXaraFileRegularShape::WriteShapeNative(BaseCamelotFilter *pFilter, NodeRegularShape *pShape)
{
    ERROR2IF(pFilter == NULL, FALSE, "Argument pFilter == NULL.");
    ERROR2IF(pShape == NULL, FALSE, "Argument pShape == NULL.");

    NodeRegularShape MyRegularShape;
    BOOL ok = TRUE;

    if (GetUTCentrePoint(pShape) != DocCoord(0,0))
    {
        // sigh, we've got a very old regular shape, where the UT Centre Point isn't the
        // origin (it is for all v1.0 and later versions of Camelot). Instead we make a copy
        // of the shape, fix the coordinates and then save it.
        pShape->CopyNodeContents(&MyRegularShape);
        if (ok) ok = FixOldShape(&MyRegularShape);
        pShape = &MyRegularShape;
    }

    if (ok) ok = CXaraFileRegularShape::WriteShapeGeneral(pFilter, pShape);

    return ok;
}

BOOL CXaraFileRegularShape::WriteShapeWeb(BaseCamelotFilter * pFilter, NodeRegularShape *pShape)
{
    ERROR2IF(pFilter == NULL, FALSE, "Argument pFilter == NULL.");
    ERROR2IF(pShape == NULL, FALSE, "Argument pShape == NULL.");

    NodeRegularShape MyRegularShape;
    BOOL ok = TRUE;

    if (GetUTCentrePoint(pShape) != DocCoord(0,0))
    {
        // sigh, we've got a very old regular shape, where the UT Centre Point isn't the
        // origin (it is for all v1.0 and later versions of Camelot). Instead we make a copy
        // of the shape, fix the coordinates and then save it.
        pShape->CopyNodeContents(&MyRegularShape);
        if (ok) ok = FixOldShape(&MyRegularShape);
        pShape = &MyRegularShape;
    }
    
    if (IsEllipse(pShape))
    {
        ok = CXaraFileEllipse::WriteEllipse(pFilter, pShape);
    }
    else if (IsRectangle(pShape))
    {
        ok = CXaraFileRectangle::WriteRectangle(pFilter, pShape);
    }
    else // it's a polygon
    {
        ok = CXaraFilePolygon::WritePolygon(pFilter, pShape);
    }
    return ok;
}

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

>   BOOL CXaraFileRegularShape::FixOldShape(NodeRegularShape *pShape)

    Author:     Andy_Hayward (Xara Group Ltd) <camelotdev@xara.com>
    Created:    02/07/96
    Inputs:     pShape - NodeRegularShape to fix
    Returns:    TRUE if successful, FALSE otherwise
    Purpose:    Fixes old regular shapes, i.e. those which have UTCentrePoint != DocCoord(0,0)
                by adjusting the UTCentrePoint, UTMajorAxis, UTMinorAxis, TransformMatrix.

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

BOOL CXaraFileRegularShape::FixOldShape(NodeRegularShape *pShape)
{
    // since the UTCentrePoint is != DocCoord(0,0), we need to fix the major axis, minor
    // axis and the transform before we can save them. The idea is to get the
    // UTCentrePoint = DocCoord(0,0), and alter the other variables so that the transformed
    // remains the same.

    DocCoord MyUTCentrePointOld;
    DocCoord MyUTCentrePointNew;

    Matrix MyTransformOld;
    Matrix MyTransformNew;
    Matrix MyTransformNewInverse;

    DocCoord MyUTMajorAxisOld;
    DocCoord MyUTMajorAxisNew;
    DocCoord MyUTMinorAxisOld;
    DocCoord MyUTMinorAxisNew;

    {
        // retrieve the all values
        MyUTCentrePointOld = pShape->GetUTCentrePoint();
        pShape->GetTransformMatrix(&MyTransformOld);
        MyUTMajorAxisOld = pShape->GetUTMajorAxes();
        MyUTMinorAxisOld = pShape->GetUTMinorAxes();
    }

    {
        // set the new UTCentrePoint. Simple really, and the compiler should constant-fold
        // this variable away.
        MyUTCentrePointNew = DocCoord(0,0);
    }

    {
        // calculate the new transform matrix. We know that
        //
        // UTCentrePointOld * TransformOld = UTCentrePointNew * TransformNew
        //
        // and that UTCentrePointNew = DocCoord(0,0). Hence (you can probably guess what I
        // mean by this) TransformNew.matrix = TransformOld.matrix and
        // TransformNew.translation = TransformedCentrePoint.

        DocCoord MyCentrePoint;

        MyCentrePoint = pShape->GetUTCentrePoint();
        MyTransformOld.transform(&MyCentrePoint);
        MyTransformNew = MyTransformOld;
        MyTransformNew.SetTranslation(MyCentrePoint);

        MyTransformNewInverse = MyTransformNew.Inverse();
    }

    {
        // calculate the new major and minor axes. Since:
        //
        // UTMajorAxisOld * TransformOld = UTMajorAxisNew * TransformNew
        //
        // then
        //
        // UTMajorAxisNew = (UTMajorAxisOld * TransformOld) * TransformNew'

        MyUTMajorAxisNew = MyUTMajorAxisOld;
        MyTransformOld.transform(&MyUTMajorAxisNew);
        MyTransformNewInverse.transform(&MyUTMajorAxisNew);

        MyUTMinorAxisNew = MyUTMinorAxisOld;
        MyTransformOld.transform(&MyUTMinorAxisNew);
        MyTransformNewInverse.transform(&MyUTMinorAxisNew);
    }

    {
        // now set the variables to their new values.

        pShape->SetCentrePoint(MyUTCentrePointNew);
        pShape->SetTransformMatrix(&MyTransformNew);
        pShape->SetMajorAxes(MyUTMajorAxisNew);
        pShape->SetMinorAxes(MyUTMinorAxisNew);
    }

    return TRUE;
}

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

>   BOOL CXaraFileRegularShape::WriteShapeGeneral(BaseCamelotFilter * pFilter, NodeRegularShape *pShape)

    Author:     Andy_Hayward (Xara Group Ltd) <camelotdev@xara.com>
    Created:    04/06/96
    Inputs:     pFilter - filter to use
                pShape  - regular shape to save out
    Returns:    boolean value indicating sucess of writing record to filter
    Purpose:    Writes a generic regular shape record to the filter

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

BOOL CXaraFileRegularShape::WriteShapeGeneral(BaseCamelotFilter * pFilter, NodeRegularShape *pShape)
{
    BOOL ok;

    CamelotFileRecord Rec(pFilter, TAG_REGULAR_SHAPE_PHASE_2, TAG_REGULAR_SHAPE_PHASE_2_SIZE);

    ok = Rec.Init();
    if (ok) ok = Rec.WriteBYTE(GetFlags(pShape));
    if (ok) ok = Rec.WriteUINT16(GetNumberOfSides(pShape));
    if (ok) ok = Rec.WriteCoordTrans(GetUTMajorAxis(pShape),0,0);
    if (ok) ok = Rec.WriteCoordTrans(GetUTMinorAxis(pShape),0,0);
    if (ok) ok = Rec.WriteMatrix(GetTransformMatrix(pShape));
    if (ok) ok = Rec.WriteDOUBLE(GetStellationRadius(pShape));
    if (ok) ok = Rec.WriteDOUBLE(GetStellationOffset(pShape));
    if (ok) ok = Rec.WriteDOUBLE(GetPrimaryCurvature(pShape));
    if (ok) ok = Rec.WriteDOUBLE(GetSecondaryCurvature(pShape));
    if (ok) ok = Rec.WritePath(GetPrimaryEdgePath(pShape));
    if (ok) ok = Rec.WritePath(GetSecondaryEdgePath(pShape));
    if (ok) ok = pFilter->Write(&Rec);

    return ok;
}

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

>   BOOL CXaraFileRegularShape::WriteShapeInvalid(BaseCamelotFilter * pFilter, NodeRegularShape *pShape)

    Author:     Andy_Hayward (Xara Group Ltd) <camelotdev@xara.com>
    Created:    04/06/96
    Inputs:     pFilter - filter to use
                pShape  - regular shape to save out
    Returns:    FALSE
    Purpose:    Called when earlier functions are asked to write an invalid shape to the file.
                We raise an ERROR3, then return FALSE.

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

BOOL CXaraFileRegularShape::WriteShapeInvalid(BaseCamelotFilter * pFilter, NodeRegularShape *pShape)
{
    ERROR3("Invalid shape being written to file.");

    return FALSE;
}

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

>   BOOL CXaraFileRegularShape::IsEllipse(NodeRegularShape *pShape)
    BOOL CXaraFileRegularShape::IsRectangle(NodeRegularShape *pShape)
    BOOL CXaraFileRegularShape::IsSimple(NodeRegularShape *pShape)
    BOOL CXaraFileRegularShape::IsComplex(NodeRegularShape *pShape)
    BOOL CXaraFileRegularShape::IsRounded(NodeRegularShape *pShape)
    BOOL CXaraFileRegularShape::IsStellated(NodeRegularShape *pShape)
    BOOL CXaraFileRegularShape::IsReformed(NodeRegularShape *pShape)

    Author:     Andy_Hayward (Xara Group Ltd) <camelotdev@xara.com>
    Created:    04/06/96
    Inputs:     pShape - regular shape to test for a particular attribute
    Returns:    boolean value, true if the regular shape has the particular attribute, false otherwise
    Purpose:    Tests the regular shape for particular attributes.
    See Also:   <???>

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

BOOL CXaraFileRegularShape::IsEllipse(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, FALSE, "parameter pShape == NULL");

    return pShape->IsCircular();
}

BOOL CXaraFileRegularShape::IsRectangle(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, FALSE, "parameter pShape == NULL");

    // by rectangular, we mean it's not circular, and has four sides. A 'four-sided
    // polygon' would be a better name, but we stick with rectangle for legacy reasons.
    // i.e. I can't be bothered to change everything now.

    return (!IsEllipse(pShape)) && (GetNumberOfSides(pShape) == 4);
}

BOOL CXaraFileRegularShape::IsSimple(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, FALSE, "parameter pShape == NULL");

    // check to see if the transformation is just a translation, and that the major and
    // minor axes are perpendicular and parallel to the y and x axes respectively
    Matrix MyMatrix;
    BOOL FlagIsTranslation;
    DocCoord MajorAxis;
    DocCoord MinorAxis;
    
    pShape->GetTransformMatrix(&MyMatrix);
    FlagIsTranslation = MyMatrix.IsTranslation(mEpsilon);   
    MajorAxis = pShape->GetUTMajorAxes();
    MinorAxis = pShape->GetUTMinorAxes();
    
    return ((FlagIsTranslation && MajorAxis.x == 0 && MinorAxis.y == 0) ||
            (FlagIsTranslation && MajorAxis.y == 0 && MinorAxis.x == 0));

//  return MyMatrix.IsTranslation(mEpsilon) && MajorAxis.x == 0 && MinorAxis.y == 0;
}

BOOL CXaraFileRegularShape::IsComplex(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, FALSE, "parameter pShape == NULL");

    return !(IsSimple(pShape));
}

BOOL CXaraFileRegularShape::IsRounded(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, FALSE, "parameter pShape == NULL");

    return pShape->IsPrimaryCurvature();
}

BOOL CXaraFileRegularShape::IsStellated(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, FALSE, "parameter pShape == NULL");

    return pShape->IsStellated();
}

BOOL CXaraFileRegularShape::IsReformed(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, FALSE, "parameter pShape == NULL");

    return pShape->IsReformed();
}

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

>   BYTE CXaraFileRegularShape::GetFlags(NodeRegularShape *pShape);

    Author:     Andy_Hayward (Xara Group Ltd) <camelotdev@xara.com>
    Created:    13/06/96
    Inputs:     pShape - Node regular shape to retrieve flag information from
    Returns:    BYTE of information
    Purpose:    Retrieves flag information from node regular shapes

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

BYTE CXaraFileRegularShape::GetFlags(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, 0, "parameter pShape == NULL");

    BYTE result = 0;

    // !!HACK!! constants in code.
    // !!HACK!! see RegularShapeRecordHandler::SetFlags for the other bit of code which
    // !!HACK!! needs these constants.
    if (pShape->IsCircular()) result |= 0x1;
    if (pShape->IsStellated()) result |= 0x2;
    if (pShape->IsPrimaryCurvature()) result |= 0x4;
    if (pShape->IsStellationCurvature()) result |= 0x8;

    return result;
}

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

>   DocCoord CXaraFileRegularShape::GetCentrePoint(NodeRegularShape *pShape)
    DocCoord CXaraFileRegularShape::GetMajorAxis(NodeRegularShape *pShape)
    DocCoord CXaraFileRegularShape::GetMinorAxis(NodeRegularShape *pShape)
    DocCoord CXaraFileRegularShape::GetUTCentrePoint(NodeRegularShape *pShape)
    DocCoord CXaraFileRegularShape::GetUTMajorAxis(NodeRegularShape *pShape)
    DocCoord CXaraFileRegularShape::GetUTMinorAxis(NodeRegularShape *pShape)
    INT32 CXaraFileRegularShape::GetHeight(NodeRegularShape *pShape)
    INT32 CXaraFileRegularShape::GetWidth(NodeRegularShape *pShape)
    UINT16 CXaraFileRegularShape::GetNumberOfSides(NodeRegularShape *pShape)
    double CXaraFileRegularShape::GetCurvature(NodeRegularShape *pShape)
    double CXaraFileRegularShape::GetPrimaryCurvature(NodeRegularShape *pShape)
    double CXaraFileRegularShape::GetSecondaryCurvature(NodeRegularShape *pShape)
    double CXaraFileRegularShape::GetStellationRadius(NodeRegularShape *pShape)
    double CXaraFileRegularShape::GetStellationOffset(NodeRegularShape *pShape)
    Matrix * CXaraFileRegularShape::GetTransformMatrix(NodeRegularShape *pShape);
    PATH * CXaraFileRegularShape::GetEdgePath(NodeRegularShape *pShape)
    PATH * CXaraFileRegularShape::GetPrimaryEdgePath(NodeRegularShape *pShape)
    PATH * CXaraFileRegularShape::GetSecondaryEdgePath(NodeRegularShape *pShape)

    Author:     Andy_Hayward (Xara Group Ltd) <camelotdev@xara.com>
    Created:    04/06/96
    Inputs:     pShape - regular shape to retrive information from
    Returns:    information from the regular shape
    Purpose:    Functions to retrieve information from regular shapes

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

DocCoord CXaraFileRegularShape::GetCentrePoint(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, DocCoord(0,0), "parameter pShape == NULL");

    return (pShape->GetCentrePoint());
}

// returns the transformed major axis relative to the origin
DocCoord CXaraFileRegularShape::GetMajorAxis(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, DocCoord(0,0), "parameter pShape == NULL");

    return (pShape->GetMajorAxes() - pShape->GetCentrePoint());
}

// returns the transformed minor axis relative to the origin
DocCoord CXaraFileRegularShape::GetMinorAxis(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, DocCoord(0,0), "parameter pShape == NULL");

    return (pShape->GetMinorAxes() - pShape->GetCentrePoint());
}

DocCoord CXaraFileRegularShape::GetUTCentrePoint(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, DocCoord(0,0), "parameter pShape == NULL");

    return (pShape->GetUTCentrePoint());
}

// returns the untransformed major axis
DocCoord CXaraFileRegularShape::GetUTMajorAxis(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, DocCoord(0,0), "parameter pShape == NULL");

    return pShape->GetUTMajorAxes();
}

// returns the untransformed minor axis
DocCoord CXaraFileRegularShape::GetUTMinorAxis(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, DocCoord(0,0), "parameter pShape == NULL");

    return pShape->GetUTMinorAxes();
}

// uses the GetMajorAxis and GetMinorAxis functions in this class to get the
// transformed major and minor axes for this regular shape. calculating the width
// and height of the shape is then trivial.
INT32 CXaraFileRegularShape::GetHeight(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, 0, "parameter pShape == NULL");

    return 2*abs(GetMajorAxis(pShape).y + GetMinorAxis(pShape).y);
}

INT32 CXaraFileRegularShape::GetWidth(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, 0, "parameter pShape == NULL");

    return 2*abs(GetMajorAxis(pShape).x + GetMinorAxis(pShape).x);
}

UINT16 CXaraFileRegularShape::GetNumberOfSides(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, 0, "parameter pShape == NULL");

    return pShape->GetNumSides();
}

double CXaraFileRegularShape::GetCurvature(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, .0, "parameter pShape == NULL");

    return pShape->GetPrimaryCurveToPrimary();
}

double CXaraFileRegularShape::GetPrimaryCurvature(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, .0, "parameter pShape == NULL");

    return pShape->GetPrimaryCurveToPrimary();
}

double CXaraFileRegularShape::GetSecondaryCurvature(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, .0, "parameter pShape == NULL");

    return pShape->GetStellCurveToStell();
}

double CXaraFileRegularShape::GetStellationRadius(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, .0, "parameter pShape == NULL");

    return pShape->GetStellRadiusToPrimary();
}

double CXaraFileRegularShape::GetStellationOffset(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, .0, "parameter pShape == NULL");

    return pShape->GetStellationRatio();
}

Matrix CXaraFileRegularShape::GetTransformMatrix(NodeRegularShape *pShape)
{
//  ERROR2IF(pShape==NULL, Matrix(), "parameter pShape == NULL");
    Matrix m;

    pShape->GetTransformMatrix(&m);

    return m;
}

Path * CXaraFileRegularShape::GetEdgePath(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, NULL, "parameter pShape == NULL");

    return &(pShape->EdgePath1);
}

Path * CXaraFileRegularShape::GetPrimaryEdgePath(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, NULL, "parameter pShape == NULL");

    return &(pShape->EdgePath1);
}

Path * CXaraFileRegularShape::GetSecondaryEdgePath(NodeRegularShape *pShape)
{
    ERROR2IF(pShape==NULL, NULL, "parameter pShape == NULL");

    return &(pShape->EdgePath2);
}

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

>   const double CXaraFileRegularShape::mEpsilon

    Author:     Andy_Hayward (Xara Group Ltd) <camelotdev@xara.com> 
    Created:    04/06/96
    Purpose:    Epsilon value used for checking matrix type
    See Also:   CXaraFileRegularShape::IsIdentity

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

const double CXaraFileRegularShape::mEpsilon = 0.000016;

---