api:dk11:delphi:gislayerpixel.tgis_layerpixel.getbitmapdata_tgis_extent_tgis_pixels_integer_integer
Table of Contents
TGIS_LayerPixel.getBitmapData method
DK11 for Delphi | GisLayerPixel.TGIS_LayerPixel.getBitmapData | Constructors | Fields | Methods | Properties | Events
Fills provided _bitmap array with values defined by _extent. If the current layer does not fully cover the _extent then values outside the layer scope should be left untouched.
Syntax
// Delphi protected function getBitmapData( const _extent : TGIS_Extent; const _bitmap : TGIS_Pixels; const _width : Integer; const _height : Integer ) : Boolean; virtual;
// C++ Builder protected: virtual bool getBitmapData( TGIS_Extent* const _extent, TGIS_Pixels* const _bitmap, const int _width, const int _height );
Parameters
| Name | Type | Description |
|---|---|---|
| _extent | TGIS_Extent | extent of the _bitmap |
| _bitmap | TGIS_Pixels | allocated bitmap(with/height ratio of the _bitmap should be the same as width/height ration of the _extent) |
| _width | Integer | width of needed area in pixels |
| _height | Integer | height of needed area in pixels |
Result
| Type | Description |
|---|---|
| Boolean | True if success; False if anything is still pending |
Remarks
Function provide "raw" data - before coordinate system applied.
2020/05/07 01:08