QGIS/python/core/auto_generated/raster/qgsrasterdataprovider.sip.in

/************************************************************************
 * This file has been generated automatically from                      *
 *                                                                      *
 * src/core/raster/qgsrasterdataprovider.h                              *
 *                                                                      *
 * Do not edit manually ! Edit header and run scripts/sipify.pl again   *
 ************************************************************************/









class QgsImageFetcher : QObject
{
%Docstring
Handles asynchronous download of images

.. versionadded:: 2.8
%End

%TypeHeaderCode
#include "qgsrasterdataprovider.h"
%End
  public:
    QgsImageFetcher( QObject *parent = 0 );
%Docstring
Constructor
%End

    virtual void start() = 0;
%Docstring
Starts the image download

.. note::

   Make sure to connect to "finish" and "error" before starting
%End

  signals:

    void finish( const QImage &legend );
%Docstring
Emitted when the download completes

:param legend: The downloaded legend image
%End
    void progress( qint64 received, qint64 total );
%Docstring
Emitted to report progress
%End
    void error( const QString &msg );
%Docstring
Emitted when an error occurs
%End
};


class QgsRasterDataProvider : QgsDataProvider, QgsRasterInterface
{
%Docstring
Base class for raster data providers.
%End

%TypeHeaderCode
#include "qgsrasterdataprovider.h"
%End
  public:

    enum ProviderCapability
    {
      NoProviderCapabilities,
      ReadLayerMetadata,
      WriteLayerMetadata,
      ProviderHintBenefitsFromResampling,
      ProviderHintCanPerformProviderResampling
    };

    typedef QFlags<QgsRasterDataProvider::ProviderCapability> ProviderCapabilities;


    QgsRasterDataProvider();

    QgsRasterDataProvider( const QString &uri,
                           const QgsDataProvider::ProviderOptions &providerOptions = QgsDataProvider::ProviderOptions(),
                           QgsDataProvider::ReadFlags flags = QgsDataProvider::ReadFlags() );
%Docstring
Constructor for QgsRasterDataProvider.

The ``uri`` argument gives a provider-specific uri indicating the underlying data
source and it's parameters.

The ``options`` argument specifies generic provider options and since QGIS 3.16 creation flags are specified within the ``flags`` value.
%End

    virtual QgsRasterInterface *clone() const = 0;


    virtual QgsRasterDataProvider::ProviderCapabilities providerCapabilities() const;
%Docstring
Returns flags containing the supported capabilities of the data provider.

.. versionadded:: 3.0
%End

    virtual bool setInput( QgsRasterInterface *input );
%Docstring
It makes no sense to set input on provider */
%End

    virtual QgsRectangle extent() const = 0;


    virtual Qgis::DataType dataType( int bandNo ) const = 0;

%Docstring
Returns data type for the band specified by number
%End

    virtual QgsFields fields() const;
%Docstring
Returns the fields of the raster layer for data providers that expose them,
the default implementation returns an empty list.

.. versionadded:: 3.14
%End
    virtual Qgis::DataType sourceDataType( int bandNo ) const = 0;

%Docstring
Returns source data type for the band specified by number,
source data type may be shorter than dataType
%End

    virtual int colorInterpretation( int bandNo ) const;
%Docstring
Returns data type for the band specified by number
%End

    QString colorName( int colorInterpretation ) const;
    virtual bool reload();
%Docstring
Reload data (data could change)
%End

    virtual QString colorInterpretationName( int bandNo ) const;

    virtual double bandScale( int bandNo ) const;
%Docstring
Read band scale for raster value

.. versionadded:: 2.3
%End

    virtual double bandOffset( int bandNo ) const;
%Docstring
Read band offset for raster value

.. versionadded:: 2.3
%End


    virtual QgsRasterBlock *block( int bandNo, const QgsRectangle &boundingBox, int width, int height, QgsRasterBlockFeedback *feedback = 0 ) /Factory/;

%Docstring
Read block of data using given extent and size.
%End

    virtual bool sourceHasNoDataValue( int bandNo ) const;
%Docstring
Returns ``True`` if source band has no data value
%End

    virtual bool useSourceNoDataValue( int bandNo ) const;
%Docstring
Returns the source nodata value usage
%End

    virtual void setUseSourceNoDataValue( int bandNo, bool use );
%Docstring
Sets the source nodata value usage
%End

    virtual double sourceNoDataValue( int bandNo ) const;
%Docstring
Value representing no data value.
%End

    virtual void setUserNoDataValue( int bandNo, const QgsRasterRangeList &noData );

    virtual QgsRasterRangeList userNoDataValues( int bandNo ) const;
%Docstring
Returns a list of user no data value ranges.
%End

    virtual QList<QgsColorRampShader::ColorRampItem> colorTable( int bandNo ) const;

    virtual QStringList subLayers() const;
%Docstring
Returns the sublayers of this layer - useful for providers that manage
their own layers, such as WMS
%End

    virtual QgsRasterDataProviderTemporalCapabilities *temporalCapabilities();


    virtual bool supportsLegendGraphic() const;
%Docstring
Returns whether the provider supplies a legend graphic
%End


    virtual QgsImageFetcher *getLegendGraphicFetcher( const QgsMapSettings *mapSettings ) /Factory/;
%Docstring
Returns a new image downloader for the raster legend.

:param mapSettings: map settings for legend providers supporting
                    contextual legends.

:return: a download handler or ``None`` if the provider does not support
         legend at all. Ownership of the returned object is transferred
         to caller.



.. versionadded:: 2.8
%End

    virtual QString buildPyramids( const QList<QgsRasterPyramid> &pyramidList,
                                   const QString &resamplingMethod = "NEAREST",
                                   QgsRaster::RasterPyramidsFormat format = QgsRaster::PyramidsGTiff,
                                   const QStringList &configOptions = QStringList(),
                                   QgsRasterBlockFeedback *feedback = 0 );
%Docstring
Create pyramid overviews
%End

    virtual QList<QgsRasterPyramid> buildPyramidList( QList<int> overviewList = QList<int>() );
%Docstring
Returns the raster layers pyramid list.

:param overviewList: used to construct the pyramid list (optional), when empty the list is defined by the provider.
                     A pyramid list defines the
                     POTENTIAL pyramids that can be in a raster. To know which of the pyramid layers
                     ACTUALLY exists you need to look at the existsFlag member in each struct stored in the
                     list.
%End

    bool hasPyramids();
%Docstring
Returns ``True`` if raster has at least one populated histogram.
%End

    virtual QString htmlMetadata() = 0;
%Docstring
Returns metadata in a format suitable for feeding directly
into a subset of the GUI raster properties "Metadata" tab.
%End

    virtual QgsRasterIdentifyResult identify( const QgsPointXY &point, QgsRaster::IdentifyFormat format, const QgsRectangle &boundingBox = QgsRectangle(), int width = 0, int height = 0, int dpi = 96 );
%Docstring
Identify raster value(s) found on the point position. The context
parameters extent, width and height are important to identify
on the same zoom level as a displayed map and to do effective
caching (WCS). If context params are not specified the highest
resolution is used. :py:func:`~QgsRasterDataProvider.capabilities` may be used to test if format
is supported by provider. Values are set to 'no data' or empty string
if point is outside data source extent.

:param point: coordinates in data source CRS
:param format: result format
:param boundingBox: context bounding box
:param width: context width
:param height: context height
:param dpi: context dpi

:return: QgsRaster.IdentifyFormatValue: map of values for each band, keys are band numbers
         (from 1).
         QgsRaster.IdentifyFormatFeature: map of QgsRasterFeatureList for each sublayer
         QgsRaster.IdentifyFormatHtml: map of HTML strings for each sublayer (WMS).
         Empty if failed or there are no results.

.. note::

   The arbitraryness of the returned document is enforced by WMS standards
   up to at least v1.3.0

.. seealso:: :py:func:`sample`
%End

    virtual double sample( const QgsPointXY &point, int band,
                           bool *ok /Out/ = 0,
                           const QgsRectangle &boundingBox = QgsRectangle(), int width = 0, int height = 0, int dpi = 96 );
%Docstring
Samples a raster value from the specified ``band`` found at the ``point`` position. The context
parameters ``boundingBox``, ``width`` and ``height`` are important to identify
on the same zoom level as a displayed map and to do effective
caching (WCS). If context params are not specified the highest
resolution is used.

If ``ok`` is specified and the point is outside data source extent, or an invalid
band number was specified, then ``ok`` will be set to ``False``. In this case the function will return
a NaN value.

.. seealso:: :py:func:`identify`

.. versionadded:: 3.4
%End

    virtual QString lastErrorTitle() = 0;
%Docstring
Returns the caption error text for the last error in this provider

If an operation returns 0 (e.g. :py:func:`~QgsRasterDataProvider.draw`), this function
returns the text of the error associated with the failure.
Interactive users of this provider can then, for example,
call a QMessageBox to display the contents.
%End

    virtual QString lastError() = 0;
%Docstring
Returns the verbose error text for the last error in this provider

If an operation returns 0 (e.g. :py:func:`~QgsRasterDataProvider.draw`), this function
returns the text of the error associated with the failure.
Interactive users of this provider can then, for example,
call a QMessageBox to display the contents.
%End

    virtual QString lastErrorFormat();
%Docstring
Returns the format of the error text for the last error in this provider
%End

    int dpi() const;
%Docstring
Returns the dpi of the output device.
%End

    void setDpi( int dpi );
%Docstring
Sets the output device resolution.
%End

    virtual QDateTime timestamp() const;
%Docstring
Time stamp of data source in the moment when data/metadata were loaded by provider
%End

    virtual QDateTime dataTimestamp() const;
%Docstring
Current time stamp of data source
%End

    virtual bool isEditable() const;
%Docstring
Checks whether the provider is in editing mode, i.e. raster write operations will be accepted.
By default providers are not editable. Use :py:func:`~QgsRasterDataProvider.setEditable` method to enable/disable editing.

.. seealso:: :py:func:`setEditable`

.. versionadded:: 3.0
%End

    virtual bool setEditable( bool enabled );
%Docstring
Turns on/off editing mode of the provider. When in editing mode, it is possible
to overwrite data of the provider using :py:func:`~QgsRasterDataProvider.writeBlock` calls.

:return: ``True`` if the switch to/from editing mode was successful

.. note::

   Only some providers support editing mode and even those may fail to turn
   the underlying data source into editing mode, so it is necessary to check the return
   value whether the operation was successful.

.. seealso:: :py:func:`isEditable`

.. versionadded:: 3.0
%End

    virtual bool write( void *data, int band, int width, int height, int xOffset, int yOffset );

    bool writeBlock( QgsRasterBlock *block, int band, int xOffset = 0, int yOffset = 0 );
%Docstring
Writes pixel data from a raster block into the provider data source.

This will override previously stored pixel values. It is assumed that cells in the passed
raster block are aligned with the cells of the data source. If raster block does not cover
the whole area of the data source, only a subset of pixels covered by the raster block
will be overwritten. By default, writing of raster data starts from the first cell
of the raster - it is possible to set offset in pixels by specifying non-zero
xOffset and yOffset values.

Writing is supported only by some data providers. Provider has to be in editing mode
in order to allow write operations.

.. seealso:: :py:func:`isEditable`

:return: ``True`` on success

.. versionadded:: 3.0
%End

    static QgsRasterDataProvider *create( const QString &providerKey,
                                          const QString &uri,
                                          const QString &format, int nBands,
                                          Qgis::DataType type,
                                          int width, int height, double *geoTransform,
                                          const QgsCoordinateReferenceSystem &crs,
                                          const QStringList &createOptions = QStringList() );
%Docstring
Creates a new dataset with mDataSourceURI
%End

    virtual bool setNoDataValue( int bandNo, double noDataValue );
%Docstring
Set no data value on created dataset

:param bandNo: band number
:param noDataValue: no data value
%End

    virtual bool remove();
%Docstring
Remove dataset
%End

    static QList<QPair<QString, QString> > pyramidResamplingMethods( const QString &providerKey );
%Docstring
Returns a list of pyramid resampling method name and label pairs
for given provider
%End

    virtual QString validateCreationOptions( const QStringList &createOptions, const QString &format );
%Docstring
Validates creation options for a specific dataset and destination format.

.. note::

   used by GDAL provider only

.. note::

   see also :py:func:`~QgsRasterDataProvider.validateCreationOptionsFormat` in gdal provider for validating options based on format only
%End

    virtual QString validatePyramidsConfigOptions( QgsRaster::RasterPyramidsFormat pyramidsFormat,
        const QStringList &configOptions, const QString &fileFormat );
%Docstring
Validates pyramid creation options for a specific dataset and destination format

.. note::

   used by GDAL provider only
%End

    static QString identifyFormatName( QgsRaster::IdentifyFormat format );
    static QgsRaster::IdentifyFormat identifyFormatFromName( const QString &formatName );
    static QString identifyFormatLabel( QgsRaster::IdentifyFormat format );
    static Capability identifyFormatToCapability( QgsRaster::IdentifyFormat format );

    virtual int stepWidth() const;
%Docstring
Step width for raster iterations.

.. seealso:: :py:func:`stepHeight`

.. versionadded:: 3.0
%End

    virtual int stepHeight() const;
%Docstring
Step height for raster iterations.

.. seealso:: :py:func:`stepWidth`

.. versionadded:: 3.0
%End

    virtual QList< double > nativeResolutions() const;
%Docstring
Returns a list of native resolutions if available, i.e. map units per pixel at which the raster source
was originally created.

Resolutions are calculated in the provider's :py:func:`~QgsRasterDataProvider.crs`.

.. versionadded:: 3.8.0
%End

    virtual bool ignoreExtents() const;
%Docstring
Returns true if the extents reported by the data provider are not reliable
and it's possible that there is renderable content outside of these extents.

.. versionadded:: 3.10.0
%End

    enum TransformType
    {
      TransformImageToLayer,
      TransformLayerToImage,
    };

    virtual QgsPoint transformCoordinates( const QgsPoint &point, TransformType type );
%Docstring
Transforms coordinates between source image coordinate space [0..width]x[0..height] and
layer coordinate space (georeferenced coordinates). Often this transformation is a simple
2D affine transformation (offset and scaling), but rasters with different georeferencing
methods like GCPs (ground control points) or RPCs (rational polynomial coefficients) may
require a more complex transform.

If the transform fails (input coordinates are outside of the valid range or data provider
does not support this functionality), an empty point is returned.

.. versionadded:: 3.14
%End


    virtual bool enableProviderResampling( bool enable );
%Docstring
Enable or disable provider-level resampling.

:return: true if success

.. versionadded:: 3.16
%End

    bool isProviderResamplingEnabled() const;
%Docstring
Returns whether provider-level resampling is enabled.

.. note::

   Resampling is effective only if :py:func:`~QgsRasterDataProvider.zoomedInResamplingMethod` and/or
   :py:func:`~QgsRasterDataProvider.zoomedOutResamplingMethod` return non-nearest resampling.

.. seealso:: :py:func:`zoomedInResamplingMethod`

.. seealso:: :py:func:`zoomedOutResamplingMethod`

.. seealso:: :py:func:`maxOversampling`


.. versionadded:: 3.16
%End

    enum class ResamplingMethod
    {
      Nearest,
      Bilinear,
      Cubic,
    };

    virtual bool setZoomedInResamplingMethod( ResamplingMethod method );
%Docstring
Set resampling method to apply for zoomed-in operations.

:return: true if success

.. versionadded:: 3.16
%End

    ResamplingMethod zoomedInResamplingMethod() const;
%Docstring
Returns resampling method for zoomed-in operations.

.. versionadded:: 3.16
%End

    virtual bool setZoomedOutResamplingMethod( ResamplingMethod method );
%Docstring
Set resampling method to apply for zoomed-out operations.

:return: true if success

.. versionadded:: 3.16
%End

    ResamplingMethod zoomedOutResamplingMethod() const;
%Docstring
Returns resampling method for zoomed-out operations.

.. versionadded:: 3.16
%End

    virtual bool setMaxOversampling( double factor );
%Docstring
Sets maximum oversampling factor for zoomed-out operations.

:return: true if success

.. versionadded:: 3.16
%End

    double maxOversampling() const;
%Docstring
Returns maximum oversampling factor for zoomed-out operations.

.. versionadded:: 3.16
%End

    virtual void readXml( const QDomElement &filterElem );


    virtual void writeXml( QDomDocument &doc, QDomElement &parentElem ) const;


  signals:

    void statusChanged( const QString & ) const;
%Docstring
Emit a message to be displayed on status bar, usually used by network providers (WMS,WCS)

.. versionadded:: 2.14
%End

  protected:



    bool userNoDataValuesContains( int bandNo, double value ) const;
%Docstring
Returns ``True`` if user no data contains value
%End

    void copyBaseSettings( const QgsRasterDataProvider &other );
%Docstring
Copy member variables from other raster data provider. Useful for implementation of :py:func:`~QgsRasterDataProvider.clone` method in subclasses
%End












};

QFlags<QgsRasterDataProvider::ProviderCapability> operator|(QgsRasterDataProvider::ProviderCapability f1, QFlags<QgsRasterDataProvider::ProviderCapability> f2);



/************************************************************************
 * This file has been generated automatically from                      *
 *                                                                      *
 * src/core/raster/qgsrasterdataprovider.h                              *
 *                                                                      *
 * Do not edit manually ! Edit header and run scripts/sipify.pl again   *
 ************************************************************************/