com.viaoa.image

Class OAImageUtil

java.lang.Object

com.viaoa.image.OAImageUtil

public class OAImageUtil
extends Object

Various untility methods for working with Images.

Author:

vvia

Constructor Summary

Constructors

Constructor and Description
OAImageUtil()

Method Summary

Modifier and Type	Method and Description
static BufferedImage	brighter(Image image, byte offset)
static BufferedImage	contrast(Image image, float scale)
static String	convertOAPropertyToImageServlet(String html)
static String	convertOAPropertyToImageServlet(String html, String servletPath)
static BufferedImage	convertToBufferedImage(byte[] bs) Use a byte array to create an image.
static BufferedImage	convertToBufferedImage(Image img)
static byte[]	convertToBytes(BufferedImage bi) calls convertToJavaJPG(bi).
static byte[]	convertToBytes(Image img) Converts image to bufferedImage and then returns convertToBytes(BufferedImage bi).
static byte[]	convertToJavaJPG(BufferedImage bi) Converts a bufferedImage to a "java only" byte array "jpg" image.
static byte[]	convertToJPG(BufferedImage bi)
static byte[]	convertToJPG(byte[] bs)
static byte[]	convertToJPG(Image img)
static byte[]	convertToPNG(BufferedImage bi)
static byte[]	convertToPNG(BufferedImage bi, int bufferSize)
static byte[]	convertToPNG(byte[] bs)
static byte[]	convertToPNG(Image img)
static BufferedImage	createBufferedImage(Image img) Creates a new BufferedImage with the given image.
static BufferedImage	createScreenBufferedImage(Graphics2D g2d, int width, int height)
static BufferedImage	createScreenBufferedImage(int width, int height)
static BufferedImage	crop(Image image, int l, int t, int r, int b)
static BufferedImage	crop(Image image, Rectangle rect)
static ColorModel	getColorModel(Image img)
static String	getHtmlForJarImg(String classPath, String fileName)
static String	getHtmlForJarImg(String classPath, String fileName, int maxW, int maxH) ex: /com/vetplan/view/image, or com.vetplan.view.image will return:
static BufferedImage	getScaledInstance(Image image, int newWidth, int newHeight)
static BufferedImage	getScreenImage()
static BufferedImage	getScreenImage(Rectangle rect)
static BufferedImage	getScreenImage(Window window)
static boolean	hasAlpha(Image img)
protected static BufferedImage	loadCMYK(InputStream is)
static BufferedImage	loadImage(File file) Uses imageio to read an image.
static void	loadImage(Image img)
static BufferedImage	loadImage(InputStream is)
static BufferedImage	loadImage(String fname)
static BufferedImage	loadImage(URL url)
static BufferedImage	loadImage(URLConnection conn)
static BufferedImage	loadImageUsingURL(String urlString)
static BufferedImage	loadImageUsingURL(URL url)
static BufferedImage	loadWebImage(String url)
static byte[]	loadWebImageBytes(String url)
static void	main(String[] args)
static void	mainA(String[] args)
static void	mainB(String[] args)
static void	mainx(String[] args)
static void	mainZ(String[] args)
static BufferedImage	removeAlphaChannel(BufferedImage src)
static BufferedImage	removeTransparency(Image image)
static BufferedImage	rotate(Image image, int degrees)
static void	saveAsGif(Image image, File file)
static boolean	saveAsJpeg(Image img, File file)
static boolean	saveAsJpeg(Image img, File file, float quality)
static void	saveAsPng(Image image, File file)
static BufferedImage	scale(Image image, double xPercent, double yPercent)
static BufferedImage	scale(Image image, int newWidth, int newHeight)
static BufferedImage	scaleDownToSize(Image image, int maxWidth, int maxHeight)
static BufferedImage	scaleToSize(Image image, int maxWidth, int maxHeight)
static BufferedImage	setTransparentColor(Image img, Color color)
static void	test()

Methods inherited from class java.lang.Object

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

Constructor Detail

OAImageUtil

public OAImageUtil()

Method Detail

convertToBufferedImage

public static BufferedImage convertToBufferedImage(byte[] bs)
                                            throws IOException

Use a byte array to create an image. This uses ImageIO, which will determine the type of image format (png,gif,jpg).

Throws:

IOException

loadImage

public static void loadImage(Image img)

createBufferedImage

public static BufferedImage createBufferedImage(Image img)

Creates a new BufferedImage with the given image.

hasAlpha

public static boolean hasAlpha(Image img)

getColorModel

public static ColorModel getColorModel(Image img)

convertToBufferedImage

public static BufferedImage convertToBufferedImage(Image img)

Parameters:

img - if this is a BufferedImage, then it will be returned, else a BufferedImage will be created.

Returns:

convertToBytes

public static byte[] convertToBytes(BufferedImage bi)
                             throws IOException

calls convertToJavaJPG(bi).

Throws:

IOException

convertToJavaJPG

public static byte[] convertToJavaJPG(BufferedImage bi)
                               throws IOException

Converts a bufferedImage to a "java only" byte array "jpg" image. This is the internal format used by OA, which use JPG format, with support for Alpha (transparency). IMPORTANT: If there is transparency (alpha channel), then it will work only for Java programs that use the image. To use for outside of Java: if hasAlpha() is true, then convert to PNG, instead of jpg

Throws:

IOException

convertToPNG

public static byte[] convertToPNG(Image img)
                           throws IOException

Throws:

IOException

convertToPNG

public static byte[] convertToPNG(byte[] bs)
                           throws IOException

Throws:

IOException

convertToPNG

public static byte[] convertToPNG(BufferedImage bi)
                           throws IOException

Throws:

IOException

convertToPNG

public static byte[] convertToPNG(BufferedImage bi,
                                  int bufferSize)
                           throws IOException

Throws:

IOException

convertToJPG

public static byte[] convertToJPG(Image img)
                           throws IOException

Throws:

IOException

convertToJPG

public static byte[] convertToJPG(BufferedImage bi)
                           throws IOException

Throws:

IOException

convertToJPG

public static byte[] convertToJPG(byte[] bs)
                           throws IOException

Throws:

IOException

convertToBytes

public static byte[] convertToBytes(Image img)
                             throws IOException

Converts image to bufferedImage and then returns convertToBytes(BufferedImage bi).

Throws:

IOException

crop

public static BufferedImage crop(Image image,
                                 Rectangle rect)

crop

public static BufferedImage crop(Image image,
                                 int l,
                                 int t,
                                 int r,
                                 int b)

scale

public static BufferedImage scale(Image image,
                                  double xPercent,
                                  double yPercent)

getScaledInstance

public static BufferedImage getScaledInstance(Image image,
                                              int newWidth,
                                              int newHeight)

scaleToSize

public static BufferedImage scaleToSize(Image image,
                                        int maxWidth,
                                        int maxHeight)

scaleDownToSize

public static BufferedImage scaleDownToSize(Image image,
                                            int maxWidth,
                                            int maxHeight)

scale

public static BufferedImage scale(Image image,
                                  int newWidth,
                                  int newHeight)

rotate

public static BufferedImage rotate(Image image,
                                   int degrees)

saveAsJpeg

public static boolean saveAsJpeg(Image img,
                                 File file)

loadImage

public static BufferedImage loadImage(String fname)
                               throws IOException

Throws:

IOException

loadImage

public static BufferedImage loadImage(File file)
                               throws IOException

Uses imageio to read an image. If this fails, then have the image externally saved. There are issues with reading jpg, and they should be converted to RGB, instead of CMYK, since the later has too many variations.

Throws:

IOException

saveAsJpeg

public static boolean saveAsJpeg(Image img,
                                 File file,
                                 float quality)

Parameters:

img -

file -

quality - between 0.0 and 1.0, 0=best compression

getScreenImage

public static BufferedImage getScreenImage()

getScreenImage

public static BufferedImage getScreenImage(Window window)

getScreenImage

public static BufferedImage getScreenImage(Rectangle rect)

brighter

public static BufferedImage brighter(Image image,
                                     byte offset)

Parameters:

offset - to add to each pixel, between 0-255

contrast

public static BufferedImage contrast(Image image,
                                     float scale)

Parameters:

scale - contrast multiplier

removeTransparency

public static BufferedImage removeTransparency(Image image)

setTransparentColor

public static BufferedImage setTransparentColor(Image img,
                                                Color color)

saveAsGif

public static void saveAsGif(Image image,
                             File file)

saveAsPng

public static void saveAsPng(Image image,
                             File file)

loadImageUsingURL

public static BufferedImage loadImageUsingURL(URL url)

loadImageUsingURL

public static BufferedImage loadImageUsingURL(String urlString)

loadImage

public static BufferedImage loadImage(URLConnection conn)

loadImage

public static BufferedImage loadImage(URL url)

loadImage

public static BufferedImage loadImage(InputStream is)
                               throws Exception

Throws:

Exception

loadCMYK

protected static BufferedImage loadCMYK(InputStream is)
                                 throws Exception

Throws:

Exception

getHtmlForJarImg

public static String getHtmlForJarImg(String classPath,
                                      String fileName)

getHtmlForJarImg

public static String getHtmlForJarImg(String classPath,
                                      String fileName,
                                      int maxW,
                                      int maxH)

ex: /com/vetplan/view/image, or com.vetplan.view.image will return:

See Also:

com.viaoa.jfc.editor.html.protocol.classpath.Handler

createScreenBufferedImage

public static BufferedImage createScreenBufferedImage(int width,
                                                      int height)

createScreenBufferedImage

public static BufferedImage createScreenBufferedImage(Graphics2D g2d,
                                                      int width,
                                                      int height)

convertOAPropertyToImageServlet

public static String convertOAPropertyToImageServlet(String html)

convertOAPropertyToImageServlet

public static String convertOAPropertyToImageServlet(String html,
                                                     String servletPath)

test

public static void test()
                 throws Exception

Throws:

Exception

mainA

public static void mainA(String[] args)
                  throws Exception

Throws:

Exception

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception

mainB

public static void mainB(String[] args)
                  throws Exception

Throws:

Exception

mainZ

public static void mainZ(String[] args)
                  throws Exception

Throws:

Exception

mainx

public static void mainx(String[] args)
                  throws Exception

Throws:

Exception

removeAlphaChannel

public static BufferedImage removeAlphaChannel(BufferedImage src)

loadWebImage

public static BufferedImage loadWebImage(String url)
                                  throws Exception

Throws:

Exception

loadWebImageBytes

public static byte[] loadWebImageBytes(String url)
                                throws Exception

Throws:

Exception