mil.nga.geopackage.tiles

Class ImageUtils

java.lang.Object

mil.nga.geopackage.tiles.ImageUtils

public class ImageUtils
extends Object

Image utility methods

Author:

osbornb

Field Summary

Fields

Modifier and Type	Field and Description
static String	IMAGE_FORMAT_JPEG jpeg image format
static String	IMAGE_FORMAT_JPG jpg image format
static String	IMAGE_FORMAT_PNG png image format

Constructor Summary

Constructors

Constructor and Description
ImageUtils()

Method Summary

Modifier and Type	Method and Description
static void	closeQuietly(Closeable closeable) Close quietly
static byte[]	compressAndWriteImageToBytes(BufferedImage image, String formatName, float quality) Compress and write the image to bytes in the provided format and quality
static BufferedImage	createBufferedImage(int width, int height, String imageFormat) Create a buffered image for the dimensions and image format
static BufferedImage	getImage(byte[] imageBytes) Get a buffered image of the image bytes
static boolean	isFullyTransparent(BufferedImage image) Check if the image is fully transparent, meaning it contains only transparent pixels as an empty image
static boolean	isTransparent(BufferedImage image, int x, int y) Check if the pixel in the image at the x and y is transparent
static byte[]	writeImageToBytes(BufferedImage image, String formatName) Write the image to bytes in the provided format
static byte[]	writeImageToBytes(BufferedImage image, String formatName, Float quality) Write the image to bytes in the provided format and optional quality

Methods inherited from class java.lang.Object

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

Field Detail

IMAGE_FORMAT_PNG

public static final String IMAGE_FORMAT_PNG

png image format

See Also:

Constant Field Values

IMAGE_FORMAT_JPG

public static final String IMAGE_FORMAT_JPG

jpg image format

See Also:

Constant Field Values

IMAGE_FORMAT_JPEG

public static final String IMAGE_FORMAT_JPEG

jpeg image format

See Also:

Constant Field Values

Constructor Detail

ImageUtils

public ImageUtils()

Method Detail

createBufferedImage

public static BufferedImage createBufferedImage(int width,
                                                int height,
                                                String imageFormat)

Create a buffered image for the dimensions and image format

Parameters:

width -

height -

imageFormat -

Returns:

isFullyTransparent

public static boolean isFullyTransparent(BufferedImage image)

Check if the image is fully transparent, meaning it contains only transparent pixels as an empty image

Parameters:

image -

Returns:

isTransparent

public static boolean isTransparent(BufferedImage image,
                                    int x,
                                    int y)

Check if the pixel in the image at the x and y is transparent

Parameters:

image -

x -

y -

Returns:

getImage

public static BufferedImage getImage(byte[] imageBytes)
                              throws IOException

Get a buffered image of the image bytes

Parameters:

imageBytes -

Returns:

buffered image or null

Throws:

IOException

Since:

1.1.2

writeImageToBytes

public static byte[] writeImageToBytes(BufferedImage image,
                                       String formatName,
                                       Float quality)
                                throws IOException

Write the image to bytes in the provided format and optional quality

Parameters:

image - buffered image

formatName - image format name

quality - null or quality between 0.0 and 1.0

Returns:

image bytes

Throws:

IOException

Since:

1.1.2

writeImageToBytes

public static byte[] writeImageToBytes(BufferedImage image,
                                       String formatName)
                                throws IOException

Write the image to bytes in the provided format

Parameters:

image - buffered image

formatName - image format name

Returns:

image bytes

Throws:

IOException

Since:

1.1.2

compressAndWriteImageToBytes

public static byte[] compressAndWriteImageToBytes(BufferedImage image,
                                                  String formatName,
                                                  float quality)

Compress and write the image to bytes in the provided format and quality

Parameters:

image - buffered image

formatName - image format name

quality - quality between 0.0 and 1.0

Returns:

compressed image bytes

Throws:

IOException

Since:

1.1.2

closeQuietly

public static void closeQuietly(Closeable closeable)

Close quietly

Parameters:

closeable -

Since:

1.1.2