mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-21 00:05:53 -04:00
b119744773
* replace cancelling and cancelled by canceling and canceled, respectively see https://github.com/qgis/qgis3_UIX_discussion/issues/19 * replace cancellation by cancelation
43 lines
1.5 KiB
Plaintext
43 lines
1.5 KiB
Plaintext
class QgsRasterIterator
|
|
{
|
|
%TypeHeaderCode
|
|
#include <qgsrasteriterator.h>
|
|
%End
|
|
public:
|
|
|
|
QgsRasterIterator( QgsRasterInterface* input );
|
|
|
|
/** Start reading of raster band. Raster data can then be retrieved by calling readNextRasterPart until it returns false.
|
|
@param bandNumber number of raster band to read
|
|
@param nCols number of columns
|
|
@param nRows number of rows
|
|
@param extent area to read
|
|
@param feedback optional raster feedback object for cancelation/preview. Added in QGIS 3.0.
|
|
*/
|
|
void startRasterRead( int bandNumber, int nCols, int nRows, const QgsRectangle& extent, QgsRasterBlockFeedback* feedback = nullptr );
|
|
|
|
/** Fetches next part of raster data, caller takes ownership of the block and
|
|
caller should delete the block.
|
|
@param bandNumber band to read
|
|
@param nCols number of columns on output device
|
|
@param nRows number of rows on output device
|
|
@param block address of block pointer
|
|
@param topLeftCol top left column
|
|
@param topLeftRow top left row
|
|
@return false if the last part was already returned*/
|
|
bool readNextRasterPart( int bandNumber,
|
|
int& nCols, int& nRows,
|
|
QgsRasterBlock **block,
|
|
int& topLeftCol, int& topLeftRow );
|
|
|
|
void stopRasterRead( int bandNumber );
|
|
|
|
const QgsRasterInterface* input() const;
|
|
|
|
void setMaximumTileWidth( int w );
|
|
int maximumTileWidth() const;
|
|
|
|
void setMaximumTileHeight( int h );
|
|
int maximumTileHeight() const;
|
|
};
|