23 #ifndef QGSRASTERDATAPROVIDER_H
24 #define QGSRASTERDATAPROVIDER_H
68 virtual void start() = 0;
72 void finish(
const QImage& legend );
73 void progress( qint64 received, qint64 total );
74 void error(
const QString& msg );
104 virtual QImage* draw(
const QgsRectangle & viewExtent,
int pixelWidth,
int pixelHeight ) = 0;
120 Q_UNUSED( theBandNo );
127 switch ( colorInterpretation )
189 return colorName( colorInterpretation( theBandNo ) );
194 virtual double bandScale(
int bandNo )
const { Q_UNUSED( bandNo );
return 1.0; }
197 virtual double bandOffset(
int bandNo )
const { Q_UNUSED( bandNo );
return 0.0; }
205 virtual bool srcHasNoDataValue(
int bandNo )
const {
return mSrcHasNoDataValue.value( bandNo -1 ); }
208 virtual bool useSrcNoDataValue(
int bandNo )
const {
return mUseSrcNoDataValue.value( bandNo -1 ); }
211 virtual void setUseSrcNoDataValue(
int bandNo,
bool use );
214 virtual double srcNoDataValue(
int bandNo )
const {
return mSrcNoDataValue.value( bandNo -1 ); }
242 Q_UNUSED( forceRefresh );
243 Q_UNUSED( visibleExtent );
262 Q_UNUSED( mapSettings );
268 const QString & theResamplingMethod =
"NEAREST",
272 Q_UNUSED( thePyramidList ); Q_UNUSED( theResamplingMethod );
273 Q_UNUSED( theFormat ); Q_UNUSED( theConfigOptions );
274 return "FAILED_NOT_SUPPORTED";
294 virtual QString metadata() = 0;
330 virtual QString lastErrorTitle() = 0;
341 virtual QString lastError() = 0;
344 virtual QString lastErrorFormat();
347 int dpi()
const {
return mDpi; }
360 virtual bool write(
void* data,
int band,
int width,
int height,
int xOffset,
int yOffset )
374 const QString& format,
int nBands,
376 int width,
int height,
double* geoTransform,
384 virtual bool setNoDataValue(
int bandNo,
double noDataValue ) { Q_UNUSED( bandNo ); Q_UNUSED( noDataValue );
return false; }
387 virtual bool remove() {
return false; }
397 { Q_UNUSED( createOptions ); Q_UNUSED( format );
return QString(); }
403 { Q_UNUSED( pyramidsFormat ); Q_UNUSED( theConfigOptions ); Q_UNUSED( fileFormat );
return QString(); }
413 void progress(
int theType,
double theProgress,
QString theMessage );
414 void progressUpdate(
int theProgress );
419 virtual void readBlock(
int bandNo,
int xBlock,
int yBlock,
void *data )
420 { Q_UNUSED( bandNo ); Q_UNUSED( xBlock ); Q_UNUSED( yBlock ); Q_UNUSED( data ); }
425 { Q_UNUSED( bandNo ); Q_UNUSED( viewExtent ); Q_UNUSED( width ); Q_UNUSED( height ); Q_UNUSED( data ); }
428 bool userNoDataValuesContains(
int bandNo,
double value )
const;
433 static QStringList cStringList2Q_(
char ** stringList );
463 static void initPyramidResamplingDefs();
virtual void readBlock(int bandNo, int xBlock, int yBlock, void *data)
Read block of data.
A rectangle specified with double values.
bool setInput(QgsRasterInterface *input) override
Set input.
virtual QDateTime timestamp() const override
Time stamp of data source in the moment when data/metadata were loaded by provider.
Handles asynchronous download of images.
virtual QString validatePyramidsConfigOptions(QgsRaster::RasterPyramidsFormat pyramidsFormat, const QStringList &theConfigOptions, const QString &fileFormat)
Validates pyramid creation options for a specific dataset and destination format. ...
static QStringList mPyramidResamplingListGdal
virtual ~QgsRasterDataProvider()
virtual double bandOffset(int bandNo) const
Read band offset for raster value @note added in 2.3.
virtual double srcNoDataValue(int bandNo) const
Value representing no data value.
QDateTime mTimestamp
Timestamp of data in the moment when the data were loaded by provider.
virtual QgsImageFetcher * getLegendGraphicFetcher(const QgsMapSettings *mapSettings)
Get an image downloader for the raster legend.
virtual QImage getLegendGraphic(double scale=0, bool forceRefresh=false, const QgsRectangle *visibleExtent=0)
Returns the legend rendered as pixmap.
virtual QgsRasterRangeList userNoDataValues(int bandNo) const
Get list of user no data value ranges.
virtual bool setNoDataValue(int bandNo, double noDataValue)
Set no data value on created dataset.
Abstract base class for spatial data provider implementations.
The QgsMapSettings class contains configuration for rendering of the map.
virtual bool useSrcNoDataValue(int bandNo) const
Get source nodata value usage.
Raster identify results container.
virtual void readBlock(int bandNo, QgsRectangle const &viewExtent, int width, int height, void *data)
Read block of data using give extent and size.
virtual QList< QgsRasterPyramid > buildPyramidList(QList< int > overviewList=QList< int >())
Accessor for ths raster layers pyramid list.
virtual QStringList subLayers() const override
Returns the sublayers of this layer - useful for providers that manage their own layers, such as WMS.
virtual bool reload()
Reload data (data could change)
QList< bool > mSrcHasNoDataValue
Source no data value exists.
virtual QGis::DataType dataType(int bandNo) const =0
Returns data type for the band specified by number.
Base class for processing filters like renderers, reprojector, resampler etc.
A class to represent a point.
virtual QString colorInterpretationName(int theBandNo) const
QList< double > mSrcNoDataValue
Source no data value is available and is set to be used or internal no data is available.
virtual int colorInterpretation(int theBandNo) const
Returns data type for the band specified by number.
virtual double bandScale(int bandNo) const
Read band scale for raster value @note added in 2.3.
QString colorName(int colorInterpretation) const
virtual QgsRectangle extent()=0
Get the extent of the layer.
virtual ~QgsImageFetcher()
virtual QgsRasterInterface * clone() const =0
Clone itself, create deep copy.
virtual QGis::DataType srcDataType(int bandNo) const
Returns source data type for the band specified by number, source data type may be shorter than dataT...
virtual QString validateCreationOptions(const QStringList &createOptions, QString format)
Validates creation options for a specific dataset and destination format.
Class for storing a coordinate reference system (CRS)
DataType
Raster data types.
virtual QgsRasterBlock * block(int bandNo, const QgsRectangle &extent, int width, int height)=0
Read block of data using given extent and size.
virtual QString buildPyramids(const QList< QgsRasterPyramid > &thePyramidList, const QString &theResamplingMethod="NEAREST", QgsRaster::RasterPyramidsFormat theFormat=QgsRaster::PyramidsGTiff, const QStringList &theConfigOptions=QStringList())
Create pyramid overviews.
virtual bool write(void *data, int band, int width, int height, int xOffset, int yOffset)
Writes into the provider datasource.
virtual bool srcHasNoDataValue(int bandNo) const
Return true if source band has no data value.
int dpi() const
Returns the dpi of the output device.
virtual QList< QgsColorRampShader::ColorRampItem > colorTable(int bandNo) const
void setDpi(int dpi)
Sets the output device resolution.
virtual QDateTime dataTimestamp() const override
Current time stamp of data source.
Base class for raster data providers.
QList< QgsRasterRangeList > mUserNoDataValue
List of lists of user defined additional no data values for each band, indexed from 0...
static QgsStringMap mPyramidResamplingMapGdal
QList< bool > mUseSrcNoDataValue
Use source nodata value.