LuminanceSourceInterface
in
Interface for the luminance sources
Table of Contents
Methods
- fromBlob() : static
- Creates a LuminanceSource instance from the given data blob
- fromFile() : static
- Creates a LuminanceSource instance from the given file
- getRow() : array<string|int, int>
- Fetches one row of luminance data from the underlying platform's bitmap. Values range from 0 (black) to 255 (white). Because Java does not have an unsigned byte type, callers will have to bitwise and with 0xff for each value. It is preferable for implementations of this method to only fetch this row rather than the whole image, since no 2D Readers may be installed and getLuminances() may never be called.
Methods
fromBlob()
Creates a LuminanceSource instance from the given data blob
public
static fromBlob(string $blob[, SettingsContainerInterface|QROptions $options = new QROptions() ]) : static
Parameters
Return values
staticfromFile()
Creates a LuminanceSource instance from the given file
public
static fromFile(string $path[, SettingsContainerInterface|QROptions $options = new QROptions() ]) : static
Parameters
Return values
staticgetRow()
Fetches one row of luminance data from the underlying platform's bitmap. Values range from 0 (black) to 255 (white). Because Java does not have an unsigned byte type, callers will have to bitwise and with 0xff for each value. It is preferable for implementations of this method to only fetch this row rather than the whole image, since no 2D Readers may be installed and getLuminances() may never be called.
public
getRow(int $y) : array<string|int, int>
Parameters
- $y : int
-
The row to fetch, which must be in [0,getHeight())
Tags
Return values
array<string|int, int> —An array containing the luminance data.