QgsRasterBlock *QgsBrightnessContrastFilter::block( int bandNo, QgsRectangle const &extent, int width, int height, QgsRasterBlockFeedback *feedback )
{
Q_UNUSED( bandNo )
QgsDebugMsgLevel( QStringLiteral( "width = %1 height = %2 extent = %3" ).arg( width ).arg( height ).arg( extent.toString() ), 4 );
std::unique_ptr< QgsRasterBlock > outputBlock( new QgsRasterBlock() );
if ( !mInput )
{
return outputBlock.release();
}
// At this moment we know that we read rendered image
int bandNumber = 1;
std::unique_ptr< QgsRasterBlock > inputBlock( mInput->block( bandNumber, extent, width, height, feedback ) );
if ( !inputBlock || inputBlock->isEmpty() )
{
QgsDebugMsg( QStringLiteral( "No raster data!" ) );
return outputBlock.release();
}
if ( mBrightness == 0 && mContrast == 0 )
{
QgsDebugMsgLevel( QStringLiteral( "No brightness changes." ), 4 );
return inputBlock.release();
}
if ( !outputBlock->reset( Qgis::ARGB32_Premultiplied, width, height ) )
{
return outputBlock.release();
}
// adjust image
QRgb myNoDataColor = qRgba( 0, 0, 0, 0 );
QRgb myColor;
int r, g, b, alpha;
double f = std::pow( ( mContrast + 100 ) / 100.0, 2 );
for ( qgssize i = 0; i < ( qgssize )width * height; i++ )
{
if ( inputBlock->color( i ) == myNoDataColor )
{
outputBlock->setColor( i, myNoDataColor );
continue;
}
myColor = inputBlock->color( i );
alpha = qAlpha( myColor );
r = adjustColorComponent( qRed( myColor ), alpha, mBrightness, f );
g = adjustColorComponent( qGreen( myColor ), alpha, mBrightness, f );
b = adjustColorComponent( qBlue( myColor ), alpha, mBrightness, f );
outputBlock->setColor( i, qRgba( r, g, b, alpha ) );
}
return outputBlock.release();
}
QgsRasterBlock * QgsBrightnessContrastFilter::block( int bandNo, QgsRectangle const & extent, int width, int height )
{
Q_UNUSED( bandNo );
QgsDebugMsg( QString( "width = %1 height = %2 extent = %3" ).arg( width ).arg( height ).arg( extent.toString() ) );
QgsRasterBlock *outputBlock = new QgsRasterBlock();
if ( !mInput )
{
return outputBlock;
}
// At this moment we know that we read rendered image
int bandNumber = 1;
QgsRasterBlock *inputBlock = mInput->block( bandNumber, extent, width, height );
if ( !inputBlock || inputBlock->isEmpty() )
{
QgsDebugMsg( "No raster data!" );
delete inputBlock;
return outputBlock;
}
if ( mBrightness == 0 && mContrast == 0 )
{
QgsDebugMsg( "No brightness changes." );
delete outputBlock;
return inputBlock;
}
if ( !outputBlock->reset( QGis::ARGB32_Premultiplied, width, height ) )
{
delete inputBlock;
return outputBlock;
}
// adjust image
QRgb myNoDataColor = qRgba( 0, 0, 0, 0 );
QRgb myColor;
int r, g, b, alpha;
double f = qPow(( mContrast + 100 ) / 100.0, 2 );
for ( size_t i = 0; i < ( size_t )width*height; i++ )
{
if ( inputBlock->color( i ) == myNoDataColor )
{
outputBlock->setColor( i, myNoDataColor );
continue;
}
myColor = inputBlock->color( i );
alpha = qAlpha( myColor );
r = adjustColorComponent( qRed( myColor ), alpha, mBrightness, f );
g = adjustColorComponent( qGreen( myColor ), alpha, mBrightness, f );
b = adjustColorComponent( qBlue( myColor ), alpha, mBrightness, f );
outputBlock->setColor( i, qRgba( r, g, b, alpha ) );
}
delete inputBlock;
return outputBlock;
}
void LeftRightTiltColorGenerator::adjustCurrentColor(void) {
currentColor.r = adjustColorComponent(currentColor.r, targetColor.r);
currentColor.g = adjustColorComponent(currentColor.g, targetColor.g);
currentColor.b = adjustColorComponent(currentColor.b, targetColor.b);
}
