bool QgsRasterBlock::isEmpty() const
{
QgsDebugMsg( QString( "mWidth= %1 mHeight = %2 mDataType = %3 mData = %4 mImage = %5" ).arg( mWidth ).arg( mHeight ).arg( mDataType ).arg(( intptr_t )mData ).arg(( intptr_t )mImage ) );
if ( mWidth == 0 || mHeight == 0 ||
( typeIsNumeric( mDataType ) && mData == 0 ) ||
( typeIsColor( mDataType ) && mImage == 0 ) )
{
return true;
}
return false;
}
bool QgsRasterBlock::reset( QGis::DataType theDataType, int theWidth, int theHeight, double theNoDataValue )
{
QgsDebugMsg( QString( "theWidth= %1 theHeight = %2 theDataType = %3 theNoDataValue = %4" ).arg( theWidth ).arg( theHeight ).arg( theDataType ).arg( theNoDataValue ) );
qgsFree( mData );
mData = nullptr;
delete mImage;
mImage = nullptr;
qgsFree( mNoDataBitmap );
mNoDataBitmap = nullptr;
mDataType = QGis::UnknownDataType;
mTypeSize = 0;
mWidth = 0;
mHeight = 0;
mHasNoDataValue = false;
mNoDataValue = std::numeric_limits<double>::quiet_NaN();
mValid = false;
if ( typeIsNumeric( theDataType ) )
{
QgsDebugMsg( "Numeric type" );
qgssize tSize = typeSize( theDataType );
QgsDebugMsg( QString( "allocate %1 bytes" ).arg( tSize * theWidth * theHeight ) );
mData = qgsMalloc( tSize * theWidth * theHeight );
if ( !mData )
{
QgsDebugMsg( QString( "Couldn't allocate data memory of %1 bytes" ).arg( tSize * theWidth * theHeight ) );
return false;
}
}
else if ( typeIsColor( theDataType ) )
{
QgsDebugMsg( "Color type" );
QImage::Format format = imageFormat( theDataType );
mImage = new QImage( theWidth, theHeight, format );
}
else
{
QgsDebugMsg( "Wrong data type" );
return false;
}
mValid = true;
mDataType = theDataType;
mTypeSize = QgsRasterBlock::typeSize( mDataType );
mWidth = theWidth;
mHeight = theHeight;
mHasNoDataValue = true;
mNoDataValue = theNoDataValue;
QgsDebugMsg( QString( "mWidth= %1 mHeight = %2 mDataType = %3 mData = %4 mImage = %5" ).arg( mWidth ).arg( mHeight ).arg( mDataType )
.arg( reinterpret_cast< ulong >( mData ) ).arg( reinterpret_cast< ulong >( mImage ) ) );
return true;
}
bool QgsRasterBlock::isEmpty() const
{
QgsDebugMsg( QString( "mWidth= %1 mHeight = %2 mDataType = %3 mData = %4 mImage = %5" ).arg( mWidth ).arg( mHeight ).arg( mDataType )
.arg( reinterpret_cast< ulong >( mData ) ).arg( reinterpret_cast< ulong >( mImage ) ) );
if ( mWidth == 0 || mHeight == 0 ||
( typeIsNumeric( mDataType ) && !mData ) ||
( typeIsColor( mDataType ) && !mImage ) )
{
return true;
}
return false;
}
bool QgsRasterBlock::setIsNoData()
{
QgsDebugMsg( "Entered" );
if ( typeIsNumeric( mDataType ) )
{
if ( mHasNoDataValue )
{
if ( !mData )
{
QgsDebugMsg( "Data block not allocated" );
return false;
}
QgsDebugMsg( "set mData to mNoDataValue" );
int dataTypeSize = typeSize( mDataType );
QByteArray noDataByteArray = valueBytes( mDataType, mNoDataValue );
char *nodata = noDataByteArray.data();
for ( qgssize i = 0; i < static_cast< qgssize >( mWidth )*mHeight; i++ )
{
memcpy( reinterpret_cast< char* >( mData ) + i*dataTypeSize, nodata, dataTypeSize );
}
}
else
{
// use bitmap
if ( !mNoDataBitmap )
{
if ( !createNoDataBitmap() )
{
return false;
}
}
QgsDebugMsg( "set mNoDataBitmap to 1" );
memset( mNoDataBitmap, 0xff, mNoDataBitmapSize );
}
return true;
}
else
{
// image
if ( !mImage )
{
QgsDebugMsg( "Image not allocated" );
return false;
}
QgsDebugMsg( "Fill image" );
mImage->fill( mNoDataColor );
return true;
}
}
bool QgsRasterRenderer::setInput( QgsRasterInterface* input )
{
// Renderer can only work with numerical values in at least 1 band
if ( !input ) return false;
if ( !mOn )
{
// In off mode we can connect to anything
mInput = input;
return true;
}
for ( int i = 1; i <= input->bandCount(); i++ )
{
if ( !typeIsNumeric( input->dataType( i ) ) )
{
return false;
}
}
mInput = input;
return true;
}
