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api:dk11:delphi:gislayerpng.tgis_layerpng.getalphaline_tbytes_integer_integer_integer_integer

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TGIS_LayerPNG.getAlphaLine method

DK11 for Delphi | GisLayerPNG.TGIS_LayerPNG.getAlphaLine | Constructors | Fields | Methods | Properties

Internal use only. For reading an image line alpha information.

Available also on: .NET | Java.

Syntax

Overrides TGIS_LayerPixel.getAlphaLine.

// Delphi
protected
  function getAlphaLine(
    const _buffer : TBytes;
    const _offset : Integer;
    const _linenr : Integer;
    const _start : Integer;
    const _bytes : Integer
  ) : Integer; override;
// C++ Builder
protected:
  virtual int getAlphaLine(
    TBytes* const _buffer,
    const int _offset,
    const int _linenr,
    const int _start,
    const int _bytes
  );

Parameters

Name Type Description
_buffer TBytes bytes array
_offset Integer start in _buffer
_linenr Integer line number
_start Integer left margin (bytes to skip)
_bytes Integer bytes count

Result

Type Description
Integer number of read bytes
2020/05/07 01:08

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