QGIS/python/core/auto_generated/raster/qgsrasterdataprovider.sip.in
Alessandro Pasotti 2078ef5c03 [wms] Fix unreported issue max tile size from capabilities ignored
Fix an unreported issue with WMS client ignoring the advertised tile
size from GetCapabilities (because the raster iterator always used
its own hardcoded default).

A new method was added to retrieve this information from data providers
only implemented for WMS at the moment.

The test has been reformatted for consistency with other core tests
by moving the implementation outside of the class. The actual change is
the addition of TestQgsWmsProvider::testMaxTileSize().

Funded by: M.O.S.S. Computer Grafik Systeme GmbH https://www.moss.de/
2024-10-16 09:29:36 +02:00

805 lines
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/************************************************************************
* This file has been generated automatically from *
* *
* src/core/raster/qgsrasterdataprovider.h *
* *
* Do not edit manually ! Edit header and run scripts/sipify.py again *
************************************************************************/
class QgsImageFetcher : QObject
{
%Docstring(signature="appended")
Handles asynchronous download of images
%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(signature="appended")
Base class for raster data providers.
%End
%TypeHeaderCode
#include "qgsrasterdataprovider.h"
%End
public:
QgsRasterDataProvider();
QgsRasterDataProvider( const QString &uri,
const QgsDataProvider::ProviderOptions &providerOptions = QgsDataProvider::ProviderOptions(),
Qgis::DataProviderReadFlags flags = Qgis::DataProviderReadFlags() );
%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 QgsRasterDataProvider *clone() const = 0;
virtual Qgis::RasterProviderCapabilities providerCapabilities() const;
%Docstring
Returns flags containing the supported capabilities of the data provider.
%End
virtual bool setInput( QgsRasterInterface *input );
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 Qgis::RasterColorInterpretation colorInterpretation( int bandNo ) const;
%Docstring
Returns data type for the band specified by number
%End
QString colorName( Qgis::RasterColorInterpretation colorInterpretation ) const;
%Docstring
Returns a string color name representation of a color interpretation.
It is translated since QGIS 3.40
%End
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
%End
virtual double bandOffset( int bandNo ) const;
%Docstring
Read band offset for raster value
%End
virtual QSize maximumTileSize() const;
%Docstring
Returns the maximum tile size in pixels for the data provider.
By default, the maximum tile size is set to :py:class:`QgsRasterIterator`.DEFAULT_MAXIMUM_TILE_WIDTH x
:py:class:`QgsRasterIterator`.DEFAULT_MAXIMUM_TILE_HEIGHT but can be overridden in subclasses (e.g. WMS
can retrieve that information from the GetCapabilities document).
.. versionadded:: 3.40
%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 QgsRasterDataProviderElevationProperties *elevationProperties();
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.
%End
virtual QString buildPyramids( const QList<QgsRasterPyramid> &pyramidList,
const QString &resamplingMethod = "NEAREST",
Qgis::RasterPyramidFormat format = Qgis::RasterPyramidFormat::GeoTiff,
const QStringList &configOptions = QStringList(),
QgsRasterBlockFeedback *feedback = 0 );
%Docstring
Creates pyramid overviews.
:param pyramidList: a list of :py:class:`QgsRasterPyramids` to create overviews for. The :py:func:`QgsRasterPyramid.setBuild()` flag
should be set to ``True`` for every layer where pyramids are desired.
:param resamplingMethod: resampling method to use when creating the pyramids. The :py:func:`~QgsRasterDataProvider.pyramidResamplingMethods` method
can be used to retrieve a list of valid resampling methods available for specific raster data providers.
:param format: raster pyramid format.
:param configOptions: optional configuration options which are passed to the specific data provider
for use during pyramid creation.
:param feedback: optional feedback argument for progress reports and cancellation support.
.. seealso:: :py:func:`buildPyramidList`
.. seealso:: :py:func:`hasPyramids`
.. seealso:: :py:func:`pyramidResamplingMethods`
%End
virtual QList<QgsRasterPyramid> buildPyramidList( const QList<int> &overviewList = QList<int>() );
%Docstring
Returns the raster layers pyramid list.
This method returns a list of pyramid layers which are valid for the data provider. The returned list
is a complete list of all possible layers, and includes both pyramids layers which currently exist and
layers which have not yet been constructed. To know which of the pyramid layers
ACTUALLY exists you need to look at the :py:func:`QgsRasterPyramid.getExists()` member for each value in the
list.
The returned list is suitable for passing to the :py:func:`~QgsRasterDataProvider.buildPyramids` method. First, modify the returned list
by calling `QgsRasterPyramid.setBuild( ``True`` )` for every layer you want to create pyramids for, and then
pass the modified list to :py:func:`~QgsRasterDataProvider.buildPyramids`.
:param overviewList: used to construct the pyramid list (optional), when empty the list is defined by the provider.
.. seealso:: :py:func:`buildPyramids`
.. seealso:: :py:func:`hasPyramids`
%End
bool hasPyramids();
%Docstring
Returns ``True`` if raster has at least one existing pyramid.
The :py:func:`~QgsRasterDataProvider.buildPyramidList` method can be used to retrieve additional details about potential and existing
pyramid layers.
.. seealso:: :py:func:`buildPyramidList`
.. seealso:: :py:func:`buildPyramids`
%End
virtual QgsRasterIdentifyResult identify( const QgsPointXY &point, Qgis::RasterIdentifyFormat 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: :py:class:`QgsRaster`.IdentifyFormatValue: map of values for each band, keys are band numbers
(from 1).
:py:class:`QgsRaster`.IdentifyFormatFeature: map of :py:class:`QgsRasterFeatureList` for each sublayer
:py:class:`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` which is much more efficient for simple "value at point" queries.
%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` which is much more flexible but considerably less efficient.
.. 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`
.. seealso:: :py:func:`writeBlock`
%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`
.. seealso:: :py:func:`writeBlock`
%End
virtual bool write( const void *data, int band, int width, int height, int xOffset, int yOffset );
%Docstring
Writes into the provider datasource
%End
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`
.. seealso:: :py:func:`setEditable`
:return: ``True`` on success
%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
struct VirtualRasterInputLayers
{
QString name;
QString uri;
QString provider;
};
struct VirtualRasterParameters
{
QgsCoordinateReferenceSystem crs;
QgsRectangle extent;
int width;
int height;
QString formula;
QList <QgsRasterDataProvider::VirtualRasterInputLayers> rInputLayers;
};
static QgsRasterDataProvider::VirtualRasterParameters decodeVirtualRasterProviderUri( const QString &uri, bool *ok = 0 );
%Docstring
Decodes the URI returning a struct with all the parameters for :py:class:`QgsVirtualRasterProvider` class
.. note::
used by Virtual Raster Provider only
.. note::
since QGIS 3.22
%End
static QString encodeVirtualRasterProviderUri( const VirtualRasterParameters &parts );
%Docstring
Encodes the URI starting from the struct .
.. note::
used by Virtual Raster Provider only
.. note::
since QGIS 3.22
%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( Qgis::RasterPyramidFormat 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( Qgis::RasterIdentifyFormat format );
%Docstring
Converts a raster identify ``format`` to a string name.
.. seealso:: :py:func:`identifyFormatFromName`
%End
static Qgis::RasterIdentifyFormat identifyFormatFromName( const QString &formatName );
%Docstring
Converts a string ``formatName`` to a raster identify format.
.. seealso:: :py:func:`identifyFormatName`
%End
static QString identifyFormatLabel( Qgis::RasterIdentifyFormat format );
%Docstring
Converts a raster identify ``format`` to a translated string label.
%End
static Qgis::RasterInterfaceCapability identifyFormatToCapability( Qgis::RasterIdentifyFormat format );
%Docstring
Converts a raster identify ``format`` to a capability.
%End
virtual int stepWidth() const;
%Docstring
Step width for raster iterations.
.. seealso:: :py:func:`stepHeight`
%End
virtual int stepHeight() const;
%Docstring
Step height for raster iterations.
.. seealso:: :py:func:`stepWidth`
%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,
CubicSpline,
Lanczos,
Average,
Mode,
Gauss
};
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;
QgsRasterAttributeTable *attributeTable( int bandNumber ) const;
%Docstring
Returns the (possibly ``None``) attribute table for the specified ``bandNumber``.
.. versionadded:: 3.30
%End
void setAttributeTable( int bandNumber, QgsRasterAttributeTable *attributeTable /Transfer/ );
%Docstring
Set the attribute table to ``attributeTable`` for the specified ``bandNumber``,
if the ``attributeTable`` is ``None`` any existing attribute table for the specified
band will be removed.
.. note::
Ownership of the attribute table is transferred to the provider.
.. versionadded:: 3.30
%End
void removeAttributeTable( int bandNumber );
%Docstring
Remove the attribute table for the specified ``bandNumber``.
If the attribute table does not exist this method does nothing.
.. versionadded:: 3.30
%End
bool writeFileBasedAttributeTable( int bandNumber, const QString &path, QString *errorMessage /Out/ = 0 ) const;
%Docstring
Writes the filesystem-based attribute table for the specified ``bandNumber`` to ``path``, optionally reporting any error in ``errorMessage``, returns ``True`` on success.
:return: ``True`` on success
.. note::
No checks for Raster Attribute Table validity are performed when saving, it is client code responsibility to handle validation.
.. versionadded:: 3.30
%End
bool readFileBasedAttributeTable( int bandNumber, const QString &path, QString *errorMessage /Out/ = 0 );
%Docstring
Loads the filesystem-based attribute table for the specified ``bandNumber`` from ``path``, optionally reporting any error in ``errorMessage``, returns ``True`` on success.
:return: ``True`` on success
.. versionadded:: 3.30
%End
virtual bool writeNativeAttributeTable( QString *errorMessage /Out/ = 0 ); //#spellok
virtual bool readNativeAttributeTable( QString *errorMessage /Out/ = 0 );
%Docstring
Reads the native attribute table, optionally reporting any error in ``errorMessage``, returns ``True`` on success.
The default implementation does nothing and returns ``False``.
Data providers that have NativeRasterAttributeTable provider capability will try to read the native attribute table.
:return: ``True`` on success
.. versionadded:: 3.30
%End
virtual QString bandDescription( int bandNumber );
signals:
void statusChanged( const QString & ) const;
%Docstring
Emit a message to be displayed on status bar, usually used by network providers (WMS,WCS)
%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
};
/************************************************************************
* This file has been generated automatically from *
* *
* src/core/raster/qgsrasterdataprovider.h *
* *
* Do not edit manually ! Edit header and run scripts/sipify.py again *
************************************************************************/