ev3dev.hardware.display

Class ImageUtils

java.lang.Object

ev3dev.hardware.display.ImageUtils

public class ImageUtils
extends java.lang.Object

Common image utilities for framebuffer manipulation

Since:

2.4.7

Constructor Summary

Constructors

Constructor and Description
ImageUtils()

Method Summary

Modifier and Type	Method and Description
static java.awt.image.BufferedImage	createBWImage(int width, int height, boolean zeroBlack) Create new BW image.
static java.awt.image.BufferedImage	createBWImage(int width, int height, boolean zeroBlack, byte[] backed) Create new BW image backed by existing data.
static java.awt.image.BufferedImage	createBWImage(int width, int height, int stride, boolean zeroBlack) Create new BW image.
static java.awt.image.BufferedImage	createBWImage(int width, int height, int stride, boolean zeroBlack, byte[] backed) Create new BW image backed by existing data.
static java.awt.image.BufferedImage	createXRGBImage(int w, int h) Create new ev3dev-compatible XRGB image.
static java.awt.image.BufferedImage	createXRGBImage(int w, int h, int stride) Create new XRGB image.
static java.awt.image.BufferedImage	createXRGBImage(int width, int height, int stride, byte[] buffer) Create new XRGB image.
static java.awt.image.BufferedImage	createXRGBImage(int width, int height, int stride, int[] offsets, byte[] buffer) Create new XRGB image.
static int[]	getDefaultComponentOffsets() Get default XRGB component offsets.
static byte[]	getImageBytes(java.awt.image.BufferedImage image) Convert image to the underlying byte buffer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ImageUtils

public ImageUtils()

Method Detail

createXRGBImage

public static java.awt.image.BufferedImage createXRGBImage(int w,
                                                           int h)

Create new ev3dev-compatible XRGB image.

Parameters:

w - Image width

h - Image height

Returns:

Configured BufferedImage

createXRGBImage

public static java.awt.image.BufferedImage createXRGBImage(int w,
                                                           int h,
                                                           int stride)

Create new XRGB image.

Parameters:

w - Image width

h - Image height

stride - Image scanline stride, i.e. how long the row is in bytes.

Returns:

Configured BufferedImage

createXRGBImage

public static java.awt.image.BufferedImage createXRGBImage(int width,
                                                           int height,
                                                           int stride,
                                                           byte[] buffer)

Create new XRGB image.

Parameters:

width - Image width

height - Image height

stride - Image scanline stride, i.e. how long the row is in bytes.

buffer - Backing buffer.

Returns:

Configured BufferedImage

createXRGBImage

public static java.awt.image.BufferedImage createXRGBImage(int width,
                                                           int height,
                                                           int stride,
                                                           int[] offsets,
                                                           byte[] buffer)

Create new XRGB image.

Parameters:

width - Image width

height - Image height

stride - Image scanline stride, i.e. how long the row is in bytes.

offsets - Array of size 4 describing the offsets of color bands: { R, G, B, A }

buffer - Backing buffer.

Returns:

Configured BufferedImage

getDefaultComponentOffsets

public static int[] getDefaultComponentOffsets()

Get default XRGB component offsets.

Returns:

Offsets: { R, G, B, A }

createBWImage

public static java.awt.image.BufferedImage createBWImage(int width,
                                                         int height,
                                                         boolean zeroBlack)

Create new BW image.

Parameters:

width - Image width.

height - Image height.

zeroBlack - Whether black color is represented by the 0 bit value.

Returns:

Configured BufferedImage.

createBWImage

public static java.awt.image.BufferedImage createBWImage(int width,
                                                         int height,
                                                         boolean zeroBlack,
                                                         byte[] backed)

Create new BW image backed by existing data.

Parameters:

width - Image width.

height - Image height.

zeroBlack - Whether black color is represented by the 0 bit value.

backed - Backing byte buffer.

Returns:

Configured BufferedImage.

createBWImage

public static java.awt.image.BufferedImage createBWImage(int width,
                                                         int height,
                                                         int stride,
                                                         boolean zeroBlack)

Create new BW image.

Parameters:

width - Image width.

height - Image height.

stride - Image scanline stride, i.e. how long the row is in bytes.

zeroBlack - Whether black color is represented by the 0 bit value.

Returns:

Configured BufferedImage.

createBWImage

public static java.awt.image.BufferedImage createBWImage(int width,
                                                         int height,
                                                         int stride,
                                                         boolean zeroBlack,
                                                         byte[] backed)

Create new BW image backed by existing data.

Parameters:

width - Image width.

height - Image height.

stride - Image scanline stride, i.e. how long the row is in bytes.

zeroBlack - Whether black color is represented by the 0 bit value.

backed - Backing byte buffer.

Returns:

Configured BufferedImage.

getImageBytes

public static byte[] getImageBytes(java.awt.image.BufferedImage image)

Convert image to the underlying byte buffer.

Parameters:

image - Configured BufferedImage.

Returns:

Byte array.