LuminanceSourceInterface
in
Table of Contents
- fromBlob() : self
- fromFile() : self
- getHeight() : int
- getMatrix() : array<string|int, mixed>
- Fetches luminance data for the underlying bitmap. Values should be fetched using: `int luminance = array[y * width + x] & 0xff`
- getRow() : array<string|int, mixed>
- 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 getMatrix() may never be called.
- getWidth() : int
Methods
fromBlob()
public
static fromBlob(string $blob) : self
Parameters
- $blob : string
Return values
self —fromFile()
public
static fromFile(string $path) : self
Parameters
- $path : string
Return values
self —getHeight()
public
getHeight() : int
Return values
int —The height of the bitmap.
getMatrix()
Fetches luminance data for the underlying bitmap. Values should be fetched using: `int luminance = array[y * width + x] & 0xff`
public
getMatrix() : array<string|int, mixed>
Return values
array<string|int, mixed> —A row-major 2D array of luminance values. Do not use result.length as it may be larger than width * height bytes on some platforms. Do not modify the contents of the result.
getRow()
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 getMatrix() may never be called.
public
getRow(int $y) : array<string|int, mixed>
Parameters
- $y : int
-
The row to fetch, which must be in [0,getHeight())
Tags
Return values
array<string|int, mixed> —An array containing the luminance data.
getWidth()
public
getWidth() : int
Return values
int —The width of the bitmap.