api:dk11:delphi:gistypesui.tgis_bitmapabstract.lockpixels_tgis_pixels_boolean_tgis_bitmapformat_tgis_bitmaplinesorder
Table of Contents
TGIS_BitmapAbstract.LockPixels method
DK for Delphi | GisTypesUI.TGIS_BitmapAbstract.LockPixels | Fields | Methods | Properties
Prepare the bitmap for direct pixel access.
Syntax
// Delphi public procedure LockPixels( var _pixels : TGIS_Pixels; const _writable : Boolean; const _format : TGIS_BitmapFormat; const _order : TGIS_BitmapLinesOrder ); virtual; abstract;
// C++ Builder public: virtual void LockPixels( TGIS_Pixels* &_pixels, const bool _writable, TGIS_BitmapFormat* const _format, TGIS_BitmapLinesOrder* const _order ) = 0;
Parameters
| Name | Type | Description |
|---|---|---|
| _pixels | TGIS_Pixels | pixel buffer allocated and maintained between LockPixels and UnlockPixels |
| _writable | Boolean | True if the caller will modify pixel values |
| _format | TGIS_BitmapFormat | desired bitmap format of locked pixels; some platform operations require a format different from the native default |
| _order | TGIS_BitmapLinesOrder | desired bitmap lines order of locked pixels; some platform operations require an order different from the native default |
Remarks
Must be paired with UnlockPixels.
2026/07/11 00:44