Package 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	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
static String	IMAGE_FORMAT_TIFF	tiff image format

Constructor Summary

Constructors

Constructor	Description
ImageUtils()

Method Summary

Modifier and Type	Method	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

IMAGE_FORMAT_TIFF

public static final String IMAGE_FORMAT_TIFF

tiff image format

Since:

1.2.1

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 - image width

height - image height

imageFormat - image format

Returns:

image

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 - image

Returns:

true if fully transparent

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 - image

x - x location

y - y location

Returns:

true if transparent

getImage

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

Get a buffered image of the image bytes

Parameters:

imageBytes - image bytes

Returns:

buffered image or null

Throws:

IOException - upon failure

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 - upon failure

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 - upon failure

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

Since:

1.1.2

closeQuietly

public static void closeQuietly(Closeable closeable)

Close quietly

Parameters:

closeable - closeable

Since:

1.1.2