void QgsRasterProjector::calc()
{
QgsDebugMsg( "Entered" );
mCPMatrix.clear();
mCPLegalMatrix.clear();
delete[] pHelperTop;
pHelperTop = 0;
delete[] pHelperBottom;
pHelperBottom = 0;
// Get max source resolution and extent if possible
mMaxSrcXRes = 0;
mMaxSrcYRes = 0;
if ( mInput )
{
QgsRasterDataProvider *provider = dynamic_cast<QgsRasterDataProvider*>( mInput->srcInput() );
if ( provider && ( provider->capabilities() & QgsRasterDataProvider::Size ) )
{
mMaxSrcXRes = provider->extent().width() / provider->xSize();
mMaxSrcYRes = provider->extent().height() / provider->ySize();
}
// Get source extent
if ( mExtent.isEmpty() )
{
mExtent = provider->extent();
}
}
mDestXRes = mDestExtent.width() / ( mDestCols );
mDestYRes = mDestExtent.height() / ( mDestRows );
// Calculate tolerance
// TODO: Think it over better
// Note: we are checking on matrix each even point, that means that the real error
// in that moment is approximately half size
double myDestRes = mDestXRes < mDestYRes ? mDestXRes : mDestYRes;
mSqrTolerance = myDestRes * myDestRes;
const QgsCoordinateTransform* ct = QgsCoordinateTransformCache::instance()->transform( mDestCRS.authid(), mSrcCRS.authid(), mDestDatumTransform, mSrcDatumTransform );
// Initialize the matrix by corners and middle points
mCPCols = mCPRows = 3;
for ( int i = 0; i < mCPRows; i++ )
{
QList<QgsPoint> myRow;
myRow.append( QgsPoint() );
myRow.append( QgsPoint() );
myRow.append( QgsPoint() );
mCPMatrix.insert( i, myRow );
// And the legal points
QList<bool> myLegalRow;
myLegalRow.append( bool( false ) );
myLegalRow.append( bool( false ) );
myLegalRow.append( bool( false ) );
mCPLegalMatrix.insert( i, myLegalRow );
}
for ( int i = 0; i < mCPRows; i++ )
{
calcRow( i, ct );
}
while ( true )
{
bool myColsOK = checkCols( ct );
if ( !myColsOK )
{
insertRows( ct );
}
bool myRowsOK = checkRows( ct );
if ( !myRowsOK )
{
insertCols( ct );
}
if ( myColsOK && myRowsOK )
{
QgsDebugMsg( "CP matrix within tolerance" );
mApproximate = true;
break;
}
// What is the maximum reasonable size of transformatio matrix?
// TODO: consider better when to break - ratio
if ( mCPRows * mCPCols > 0.25 * mDestRows * mDestCols )
{
QgsDebugMsg( "Too large CP matrix" );
mApproximate = false;
break;
}
}
QgsDebugMsg( QString( "CPMatrix size: mCPRows = %1 mCPCols = %2" ).arg( mCPRows ).arg( mCPCols ) );
mDestRowsPerMatrixRow = ( float )mDestRows / ( mCPRows - 1 );
mDestColsPerMatrixCol = ( float )mDestCols / ( mCPCols - 1 );
QgsDebugMsgLevel( "CPMatrix:", 5 );
QgsDebugMsgLevel( cpToString(), 5 );
// Calculate source dimensions
calcSrcExtent();
calcSrcRowsCols();
mSrcYRes = mSrcExtent.height() / mSrcRows;
mSrcXRes = mSrcExtent.width() / mSrcCols;
// init helper points
pHelperTop = new QgsPoint[mDestCols];
pHelperBottom = new QgsPoint[mDestCols];
calcHelper( 0, pHelperTop );
calcHelper( 1, pHelperBottom );
mHelperTopRow = 0;
}
ProjectorData::ProjectorData( const QgsRectangle &extent, int width, int height, QgsRasterInterface *input, const QgsCoordinateTransform &inverseCt, QgsRasterProjector::Precision precision )
: mApproximate( false )
, mInverseCt( inverseCt )
, mDestExtent( extent )
, mDestRows( height )
, mDestCols( width )
, mDestXRes( 0.0 )
, mDestYRes( 0.0 )
, mSrcRows( 0 )
, mSrcCols( 0 )
, mSrcXRes( 0.0 )
, mSrcYRes( 0.0 )
, mDestRowsPerMatrixRow( 0.0 )
, mDestColsPerMatrixCol( 0.0 )
, mHelperTopRow( 0 )
, mCPCols( 0 )
, mCPRows( 0 )
, mSqrTolerance( 0.0 )
, mMaxSrcXRes( 0 )
, mMaxSrcYRes( 0 )
{
QgsDebugMsgLevel( QStringLiteral( "Entered" ), 4 );
// Get max source resolution and extent if possible
if ( input )
{
QgsRasterDataProvider *provider = dynamic_cast<QgsRasterDataProvider *>( input->sourceInput() );
if ( provider )
{
if ( provider->capabilities() & QgsRasterDataProvider::Size )
{
mMaxSrcXRes = provider->extent().width() / provider->xSize();
mMaxSrcYRes = provider->extent().height() / provider->ySize();
}
// Get source extent
if ( mExtent.isEmpty() )
{
mExtent = provider->extent();
}
}
}
mDestXRes = mDestExtent.width() / ( mDestCols );
mDestYRes = mDestExtent.height() / ( mDestRows );
// Calculate tolerance
// TODO: Think it over better
// Note: we are checking on matrix each even point, that means that the real error
// in that moment is approximately half size
double myDestRes = mDestXRes < mDestYRes ? mDestXRes : mDestYRes;
mSqrTolerance = myDestRes * myDestRes;
if ( precision == QgsRasterProjector::Approximate )
{
mApproximate = true;
}
else
{
mApproximate = false;
}
// Always try to calculate mCPMatrix, it is used in calcSrcExtent() for both Approximate and Exact
// Initialize the matrix by corners and middle points
mCPCols = mCPRows = 3;
for ( int i = 0; i < mCPRows; i++ )
{
QList<QgsPointXY> myRow;
myRow.append( QgsPointXY() );
myRow.append( QgsPointXY() );
myRow.append( QgsPointXY() );
mCPMatrix.insert( i, myRow );
// And the legal points
QList<bool> myLegalRow;
myLegalRow.append( bool( false ) );
myLegalRow.append( bool( false ) );
myLegalRow.append( bool( false ) );
mCPLegalMatrix.insert( i, myLegalRow );
}
for ( int i = 0; i < mCPRows; i++ )
{
calcRow( i, inverseCt );
}
while ( true )
{
bool myColsOK = checkCols( inverseCt );
if ( !myColsOK )
{
insertRows( inverseCt );
}
bool myRowsOK = checkRows( inverseCt );
if ( !myRowsOK )
{
insertCols( inverseCt );
}
if ( myColsOK && myRowsOK )
{
QgsDebugMsgLevel( QStringLiteral( "CP matrix within tolerance" ), 4 );
break;
}
// What is the maximum reasonable size of transformatio matrix?
// TODO: consider better when to break - ratio
if ( mCPRows * mCPCols > 0.25 * mDestRows * mDestCols )
//if ( mCPRows * mCPCols > mDestRows * mDestCols )
{
QgsDebugMsgLevel( QStringLiteral( "Too large CP matrix" ), 4 );
mApproximate = false;
break;
}
}
QgsDebugMsgLevel( QStringLiteral( "CPMatrix size: mCPRows = %1 mCPCols = %2" ).arg( mCPRows ).arg( mCPCols ), 4 );
mDestRowsPerMatrixRow = static_cast< float >( mDestRows ) / ( mCPRows - 1 );
mDestColsPerMatrixCol = static_cast< float >( mDestCols ) / ( mCPCols - 1 );
QgsDebugMsgLevel( QStringLiteral( "CPMatrix:" ), 5 );
QgsDebugMsgLevel( cpToString(), 5 );
// init helper points
pHelperTop = new QgsPointXY[mDestCols];
pHelperBottom = new QgsPointXY[mDestCols];
calcHelper( 0, pHelperTop );
calcHelper( 1, pHelperBottom );
mHelperTopRow = 0;
// Calculate source dimensions
calcSrcExtent();
calcSrcRowsCols();
mSrcYRes = mSrcExtent.height() / mSrcRows;
mSrcXRes = mSrcExtent.width() / mSrcCols;
}
QgsRasterProjector::QgsRasterProjector(
QgsCoordinateReferenceSystem theSrcCRS,
QgsCoordinateReferenceSystem theDestCRS,
QgsRectangle theDestExtent,
int theDestRows, int theDestCols,
double theMaxSrcXRes, double theMaxSrcYRes,
QgsRectangle theExtent )
: mSrcCRS( theSrcCRS )
, mDestCRS( theDestCRS )
, mCoordinateTransform( theDestCRS, theSrcCRS )
, mDestExtent( theDestExtent )
, mExtent( theExtent )
, mDestRows( theDestRows ), mDestCols( theDestCols )
, mMaxSrcXRes( theMaxSrcXRes ), mMaxSrcYRes( theMaxSrcYRes )
{
QgsDebugMsg( "Entered" );
QgsDebugMsg( "theDestExtent = " + theDestExtent.toString() );
mDestXRes = mDestExtent.width() / ( mDestCols );
mDestYRes = mDestExtent.height() / ( mDestRows );
// Calculate tolerance
// TODO: Think it over better
// Note: we are checking on matrix each even point, that means taht the real error
// in that moment is approximately half size
double myDestRes = mDestXRes < mDestYRes ? mDestXRes : mDestYRes;
mSqrTolerance = myDestRes * myDestRes;
// Initialize the matrix by corners and middle points
mCPCols = mCPRows = 3;
for ( int i = 0; i < mCPRows; i++ )
{
QList<QgsPoint> myRow;
myRow.append( QgsPoint() );
myRow.append( QgsPoint() );
myRow.append( QgsPoint() );
mCPMatrix.insert( i, myRow );
}
for ( int i = 0; i < mCPRows; i++ )
{
calcRow( i );
}
while ( true )
{
bool myColsOK = checkCols();
if ( !myColsOK )
{
insertRows();
}
bool myRowsOK = checkRows();
if ( !myRowsOK )
{
insertCols();
}
if ( myColsOK && myRowsOK )
{
QgsDebugMsg( "CP matrix within tolerance" );
mApproximate = true;
break;
}
// What is the maximum reasonable size of transformatio matrix?
// TODO: consider better when to break - ratio
if ( mCPRows * mCPCols > 0.0625 * mDestRows * mDestCols )
{
QgsDebugMsg( "Too large CP matrix" );
mApproximate = false;
break;
}
}
QgsDebugMsg( QString( "CPMatrix size: mCPRows = %1 mCPCols = %2" ).arg( mCPRows ).arg( mCPCols ) );
mDestRowsPerMatrixRow = ( float )mDestRows / ( mCPRows - 1 );
mDestColsPerMatrixCol = ( float )mDestCols / ( mCPCols - 1 );
//QgsDebugMsg( "CPMatrix:\n" + cpToString() );
// Calculate source dimensions
calcSrcExtent();
calcSrcRowsCols();
mSrcYRes = mSrcExtent.height() / mSrcRows;
mSrcXRes = mSrcExtent.width() / mSrcCols;
// init helper points
pHelperTop = new QgsPoint[mDestCols];
pHelperBottom = new QgsPoint[mDestCols];
calcHelper( 0, pHelperTop );
calcHelper( 1, pHelperBottom );
mHelperTopRow = 0;
}
