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api:dk11:delphi:gistypesui.tgis_bitmapabstract.lockpixels_tgis_pixels_boolean_tgis_bitmapformat_tgis_bitmaplinesorder

Table of Contents

TGIS_BitmapAbstract.LockPixels method

DK11 for Delphi | GisTypesUI.TGIS_BitmapAbstract.LockPixels | Methods | Properties

Prepare bitmap for direct pixel access operation.

Available also on: .NET | Java.

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 by LockPixels .. UnlockPixels
_writable Boolean True, if pixels will be modified
_format TGIS_BitmapFormat desired format of locked pixels; on some platforms some system level operation required different pixel format then default
_order TGIS_BitmapLinesOrder desired line order of locked pixels; on some platforms some system level operation required different order then default

Remarks

Must be paired with UnlockPixels.

2017/10/13 23:58