Example usage for java.awt.image WritableRaster getPixels

Introduction

In this page you can find the example usage for java.awt.image WritableRaster getPixels.

Prototype

public int[] getPixels(int x, int y, int w, int h, int[] iArray) 

Source Link

Document

Returns an int array containing all samples for a rectangle of pixels, one sample per array element.

Usage

From source file:org.gmdev.pdftrick.utils.CustomExtraImgReader.java

/**
 * Invert pixel color if the image has a adobe marker ... not used now
 * @param raster/*from  www  .ja  va2  s.c  om*/
 */
@SuppressWarnings("unused")
private static void convertInvertedColors(WritableRaster raster) {
    int height = raster.getHeight();
    int width = raster.getWidth();
    int stride = width * 4;
    int[] pixelRow = new int[stride];
    for (int h = 0; h < height; h++) {
        raster.getPixels(0, h, width, 1, pixelRow);
        for (int x = 0; x < stride; x++)
            pixelRow[x] = 255 - pixelRow[x];
        raster.setPixels(0, h, width, 1, pixelRow);
    }
}

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From source file:org.gmdev.pdftrick.utils.CustomExtraImgReader.java

/**
 * Convert image profile from Ycck to Cmyk
 * @param raster/*from   ww w.ja v a  2s.  c o  m*/
 */
private static void convertYcckToCmyk(WritableRaster raster) {
    int height = raster.getHeight();
    int width = raster.getWidth();
    int stride = width * 4;
    int[] pixelRow = new int[stride];
    for (int h = 0; h < height; h++) {
        raster.getPixels(0, h, width, 1, pixelRow);

        for (int x = 0; x < stride; x += 4) {
            int y = pixelRow[x];
            int cb = pixelRow[x + 1];
            int cr = pixelRow[x + 2];

            int c = (int) (y + 1.402 * cr - 178.956);
            int m = (int) (y - 0.34414 * cb - 0.71414 * cr + 135.95984);
            y = (int) (y + 1.772 * cb - 226.316);

            if (c < 0)
                c = 0;
            else if (c > 255)
                c = 255;
            if (m < 0)
                m = 0;
            else if (m > 255)
                m = 255;
            if (y < 0)
                y = 0;
            else if (y > 255)
                y = 255;

            pixelRow[x] = 255 - c;
            pixelRow[x + 1] = 255 - m;
            pixelRow[x + 2] = 255 - y;
        }
        raster.setPixels(0, h, width, 1, pixelRow);
    }
}

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From source file:tilt.image.Blob.java

public static float setToWhite(WritableRaster wr, Rectangle bounds) {
    int blackPixels = 0;
    int yEnd = bounds.height + bounds.y;
    int xEnd = bounds.width + bounds.x;
    // set all to white
    int[] iArray = new int[bounds.width];
    int[] dirty = new int[bounds.width];
    for (int x = 0; x < bounds.width; x++)
        iArray[x] = 255;//w  w  w  .  j  a va 2  s.co m
    for (int y = bounds.y; y < yEnd; y++) {
        wr.getPixels(bounds.x, y, bounds.width, 1, dirty);
        for (int i = 0; i < dirty.length; i++)
            if (dirty[i] == 0)
                blackPixels++;
        wr.setPixels(bounds.x, y, bounds.width, 1, iArray);
    }
    return (float) blackPixels / (float) (wr.getWidth() * wr.getHeight());
}

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From source file:org.apache.fop.visual.BitmapComparator.java

/**
 * Builds a new BufferedImage that is the difference between the two input images
 * @param ref the reference bitmap//from   w ww .  j av  a2 s .  c  o  m
 * @param gen the newly generated bitmap
 * @return the diff bitmap
 */
public static BufferedImage buildDiffImage(BufferedImage ref, BufferedImage gen) {
    BufferedImage diff = new BufferedImage(ref.getWidth(), ref.getHeight(), BufferedImage.TYPE_INT_ARGB);
    WritableRaster refWR = ref.getRaster();
    WritableRaster genWR = gen.getRaster();
    WritableRaster dstWR = diff.getRaster();

    boolean refPre = ref.isAlphaPremultiplied();
    if (!refPre) {
        ColorModel cm = ref.getColorModel();
        cm = GraphicsUtil.coerceData(refWR, cm, true);
        ref = new BufferedImage(cm, refWR, true, null);
    }
    boolean genPre = gen.isAlphaPremultiplied();
    if (!genPre) {
        ColorModel cm = gen.getColorModel();
        cm = GraphicsUtil.coerceData(genWR, cm, true);
        gen = new BufferedImage(cm, genWR, true, null);
    }

    int w = ref.getWidth();
    int h = ref.getHeight();

    int y, i, val;
    int[] refPix = null;
    int[] genPix = null;
    for (y = 0; y < h; y++) {
        refPix = refWR.getPixels(0, y, w, 1, refPix);
        genPix = genWR.getPixels(0, y, w, 1, genPix);
        for (i = 0; i < refPix.length; i++) {
            // val = ((genPix[i] - refPix[i]) * 5) + 128;
            val = ((refPix[i] - genPix[i]) * 10) + 128;
            if ((val & 0xFFFFFF00) != 0) {
                if ((val & 0x80000000) != 0) {
                    val = 0;
                } else {
                    val = 255;
                }
            }
            genPix[i] = val;
        }
        dstWR.setPixels(0, y, w, 1, genPix);
    }

    if (!genPre) {
        ColorModel cm = gen.getColorModel();
        cm = GraphicsUtil.coerceData(genWR, cm, false);
    }

    if (!refPre) {
        ColorModel cm = ref.getColorModel();
        cm = GraphicsUtil.coerceData(refWR, cm, false);
    }

    return diff;
}

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