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// ProjDef.cpp : Implementation of CProjDef
#include "stdafx.h"
#include "COMTest1.h"
#include "ProjDef.h"
#include "proj_api.h"
/////////////////////////////////////////////////////////////////////////////
// CProjDef
STDMETHODIMP CProjDef::Initialize(BSTR proj_string, int *success)
{
USES_CONVERSION;
psProj = pj_init_plus( W2A(proj_string) );
if( psProj != NULL )
*success = 1;
else
{
SetProjError( "pj_init_plus failed." );
//SetError( (const char *) W2A(proj_string) );
*success = 0;
}
return S_OK;
}
STDMETHODIMP CProjDef::TransformPoint3D(IUnknown *srcProj, double *x, double *y, double *z, int *success)
{
void *psProjOther;
IProjDef *srcProjReal;
srcProj->QueryInterface( IID_IProjDef, (void **) &srcProjReal );
srcProjReal->GetHandle( (long *) &psProjOther );
if( psProjOther == NULL || psProj == NULL )
{
SetError( "One of projections not set." );
*success = 0;
return E_FAIL;
}
if( pj_is_latlong( psProjOther ) )
{
*x *= DEG_TO_RAD;
*y *= DEG_TO_RAD;
}
*success = pj_transform( psProjOther, psProj, 1, 0, x, y, z ) == 0;
if( ! *success )
SetProjError( "pj_transform failed." );
else if( pj_is_latlong( psProj ) )
{
*x *= RAD_TO_DEG;
*y *= RAD_TO_DEG;
}
return S_OK;
}
STDMETHODIMP CProjDef::GetHandle(long *pHandle)
{
*pHandle = (long) psProj;
return S_OK;
}
STDMETHODIMP CProjDef::IsLatLong(int *result)
{
if( psProj != NULL )
{
*result = pj_is_latlong( (projPJ) psProj );
return S_OK;
}
else
{
SetError( "Projection is null" );
return E_FAIL;
}
}
STDMETHODIMP CProjDef::GetLastError( BSTR *error )
{
*error = SysAllocString( sLastError );
return S_OK;
}
void CProjDef::SetError( const char *pszMessage )
{
USES_CONVERSION;
if( sLastError != NULL )
{
SysFreeString( sLastError );
sLastError = NULL;
}
sLastError = SysAllocString( A2BSTR( pszMessage ) );
}
void CProjDef::SetProjError( const char *pszMessage )
{
int *pj_errno = pj_get_errno_ref();
if( *pj_errno > 0 )
SetError( strerror( *pj_errno ) );
else if( *pj_errno < 0 )
SetError( pj_strerrno( *pj_errno ) );
else
SetError( pszMessage );
}
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