pixelimage.java

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// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) 
// Source File Name:   PixelImage.java

package se.southend.drops.gui;

import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

public class PixelImage
{

    public PixelImage(Image image)
    {
        this(image.getWidth(), image.getHeight());
        replace(image, 0, 0);
    }

    public PixelImage(int width, int height)
    {
        imageWidth = width;
        imageHeight = height;
        pixels = new int[imageWidth * imageHeight];
    }

    public int getWidth()
    {
        return imageWidth;
    }

    public int getHeight()
    {
        return imageHeight;
    }

    public int[] getRGB()
    {
        return pixels;
    }

    public Image getImage()
    {
        return Image.createRGBImage(pixels, imageWidth, imageHeight, true);
    }

    public void clear(int argb)
    {
        for(int i = pixels.length - 1; i >= 0; i--)
            pixels[i] = argb;

    }

    public void replace(Image image, int x, int y)
    {
        replace(getPixels(image), x, y, image.getWidth(), image.getHeight());
    }

    public void replace(int argb[], int x, int y, int width, int height)
    {
        setRegion(x, y, width, height);
        for(int yPos = yBeg; yPos < yEnd; yPos++)
        {
            int srcScanlength = (yPos - y) * width;
            int destScanlength = yPos * imageWidth;
            for(int xPos = xBeg; xPos < xEnd; xPos++)
                pixels[destScanlength + xPos] = argb[(srcScanlength + xPos) - x];

        }

    }

    public void blend(Image image, int x, int y)
    {
        blend(getPixels(image), x, y, image.getWidth(), image.getHeight());
    }

    public void blend(int argb[], int x, int y, int width, int height)
    {
        setRegion(x, y, width, height);
        for(int yPos = yBeg; yPos < yEnd; yPos++)
        {
            int srcScanlength = (yPos - y) * width;
            int destScanlength = yPos * imageWidth;
            for(int xPos = xBeg; xPos < xEnd; xPos++)
            {
                int fg = argb[(srcScanlength + xPos) - x];
                int bg = pixels[destScanlength + xPos];
                int fgalpha = fg >>> 24;
                int bgalpha = bg >>> 24;
                int total = fgalpha + bgalpha;
                if(total > 255)
                    total = 255;
                int fgpart = (fgalpha << 8) / (total + 1);
                int bgpart = 0xff ^ fgpart;
                int a = 255 - ((0xff ^ fgalpha) * (0xff ^ bgalpha) >>> 8);
                int r = (bg >>> 16 & 0xff) * bgpart + (fg >>> 16 & 0xff) * fgpart >>> 8;
                int g = (bg >>> 8 & 0xff) * bgpart + (fg >>> 8 & 0xff) * fgpart >>> 8;
                int b = (bg & 0xff) * bgpart + (fg & 0xff) * fgpart >>> 8;
                pixels[destScanlength + xPos] = a << 24 | r << 16 | g << 8 | b;
            }

        }

    }

    public void add(Image image, int gain, int x, int y)
    {
        add(getPixels(image), gain, x, y, image.getWidth(), image.getHeight());
    }

    public void add(int argb[], int gain, int x, int y, int width, int height)
    {
        setRegion(x, y, width, height);
        for(int yPos = yBeg; yPos < yEnd; yPos++)
        {
            int srcScanlength = (yPos - y) * width;
            int destScanlength = yPos * imageWidth;
            for(int xPos = xBeg; xPos < xEnd; xPos++)
            {
                int fg = argb[(srcScanlength + xPos) - x];
                int bg = pixels[destScanlength + xPos];
                int fgalpha = fg >>> 24;
                int r = (bg >>> 16 & 0xff) + ((fg >>> 16 & 0xff) * gain * fgalpha >>> 8);
                int g = (bg >>> 8 & 0xff) + ((fg >>> 8 & 0xff) * gain * fgalpha >>> 8);
                int b = (bg & 0xff) + ((fg & 0xff) * gain * fgalpha >>> 8);
                if(r > 255)
                    r = 255;
                if(g > 255)
                    g = 255;
                if(b > 255)
                    b = 255;
                pixels[destScanlength + xPos] = bg & 0xffffff | r << 16 | g << 8 | b;
            }

        }

    }

    private final void setRegion(int x, int y, int width, int height)
    {
        xBeg = x <= 0 ? 0 : x;
        xEnd = x + width >= imageWidth ? imageWidth : x + width;
        yBeg = y <= 0 ? 0 : y;
        yEnd = y + height >= imageHeight ? imageHeight : y + height;
    }

    private static final int[] getPixels(Image image)
    {
        int width = image.getWidth();
        int height = image.getHeight();
        int argb[] = new int[width * height];
        image.getRGB(argb, 0, width, 0, 0, width, height);
        return argb;
    }

    public void paint(Graphics graphics)
    {
        graphics.drawRGB(pixels, 0, imageWidth, 0, 0, imageWidth, imageHeight, true);
    }

    private int pixels[];
    private int imageWidth;
    private int imageHeight;
    private int xBeg;
    private int yBeg;
    private int xEnd;
    private int yEnd;
}