/*
* ConvertUtil.java
*
* Created on 12 May 2006, 09:22
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package com.inet.gradle.setup.image.image4j.util;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
import java.awt.image.ColorConvertOp;
import java.awt.image.DataBuffer;
import java.awt.image.IndexColorModel;
/**
* Provides useful methods for converting images from one colour depth to another.
* @author Ian McDonagh
*/
public class ConvertUtil {
/**
* Converts the source to 1-bit colour depth (monochrome).
* No transparency.
* @param src the source image to convert
* @return a copy of the source image with a 1-bit colour depth.
*/
public static BufferedImage convert1(BufferedImage src) {
IndexColorModel icm = new IndexColorModel(
1, 2, new byte[] { (byte) 0, (byte) 0xFF },
new byte[] { (byte) 0, (byte) 0xFF },
new byte[] { (byte) 0, (byte) 0xFF }
);
BufferedImage dest = new BufferedImage(
src.getWidth(), src.getHeight(),
BufferedImage.TYPE_BYTE_BINARY,
icm
);
ColorConvertOp cco = new ColorConvertOp(
src.getColorModel().getColorSpace(),
dest.getColorModel().getColorSpace(),
null
);
cco.filter(src, dest);
return dest;
}
/**
* Converts the source image to 4-bit colour
* using the default 16-colour palette:
* <ul>
* <li>black</li><li>dark red</li><li>dark green</li>
* <li>dark yellow</li><li>dark blue</li><li>dark magenta</li>
* <li>dark cyan</li><li>dark grey</li><li>light grey</li>
* <li>red</li><li>green</li><li>yellow</li><li>blue</li>
* <li>magenta</li><li>cyan</li><li>white</li>
* </ul>
* No transparency.
* @param src the source image to convert
* @return a copy of the source image with a 4-bit colour depth, with the default colour pallette
*/
public static BufferedImage convert4(BufferedImage src) {
int[] cmap = new int[] {
0x000000, 0x800000, 0x008000, 0x808000,
0x000080, 0x800080, 0x008080, 0x808080,
0xC0C0C0, 0xFF0000, 0x00FF00, 0xFFFF00,
0x0000FF, 0xFF00FF, 0x00FFFF, 0xFFFFFF
};
return convert4(src, cmap);
}
/**
* Converts the source image to 4-bit colour
* using the given colour map. No transparency.
* @param src the source image to convert
* @param cmap the colour map, which should contain no more than 16 entries
* The entries are in the form RRGGBB (hex).
* @return a copy of the source image with a 4-bit colour depth, with the custom colour pallette
*/
public static BufferedImage convert4(BufferedImage src, int[] cmap) {
IndexColorModel icm = new IndexColorModel(
4, cmap.length, cmap, 0, false, Transparency.OPAQUE, DataBuffer.TYPE_BYTE
);
BufferedImage dest = new BufferedImage(
src.getWidth(), src.getHeight(),
BufferedImage.TYPE_BYTE_BINARY,
icm
);
ColorConvertOp cco = new ColorConvertOp(
src.getColorModel().getColorSpace(),
dest.getColorModel().getColorSpace(),
null
);
cco.filter(src, dest);
return dest;
}
/**
* Converts the source image to 8-bit colour
* using the default 256-colour palette. No transparency.
* @param src the source image to convert
* @return a copy of the source image with an 8-bit colour depth
*/
public static BufferedImage convert8(BufferedImage src) {
BufferedImage dest = new BufferedImage(
src.getWidth(), src.getHeight(),
BufferedImage.TYPE_BYTE_INDEXED
);
ColorConvertOp cco = new ColorConvertOp(
src.getColorModel().getColorSpace(),
dest.getColorModel().getColorSpace(),
null
);
cco.filter(src, dest);
return dest;
}
/**
* Converts the source image to 24-bit colour (RGB). No transparency.
* @param src the source image to convert
* @return a copy of the source image with a 24-bit colour depth
*/
public static BufferedImage convert24(BufferedImage src) {
BufferedImage dest = new BufferedImage(
src.getWidth(), src.getHeight(),
BufferedImage.TYPE_INT_RGB
);
ColorConvertOp cco = new ColorConvertOp(
src.getColorModel().getColorSpace(),
dest.getColorModel().getColorSpace(),
null
);
cco.filter(src, dest);
return dest;
}
/**
* Converts the source image to 32-bit colour with transparency (ARGB).
* @param src the source image to convert
* @return a copy of the source image with a 32-bit colour depth.
*/
public static BufferedImage convert32(BufferedImage src) {
BufferedImage dest = new BufferedImage(
src.getWidth(), src.getHeight(),
BufferedImage.TYPE_INT_ARGB
);
ColorConvertOp cco = new ColorConvertOp(
src.getColorModel().getColorSpace(),
dest.getColorModel().getColorSpace(),
null
);
cco.filter(src, dest);
return dest;
}
}