Example usage for java.awt.image PixelGrabber PixelGrabber

Introduction

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

Prototype

public PixelGrabber(Image img, int x, int y, int w, int h, boolean forceRGB) 

Source Link

Document

Create a PixelGrabber object to grab the (x, y, w, h) rectangular section of pixels from the specified image.

Usage

From source file:org.wings.SImageIcon.java

protected static String determineMimeType(ImageIcon imageIcon) {
    String mimeType = extractMimeTypeFromPath(imageIcon.getDescription());
    if (mimeType != null)
        return mimeType;
    PixelGrabber pg = new PixelGrabber(imageIcon.getImage(), 0, 0, 1, 1, false);
    try {//w  ww  .j  a v a  2s  .  c  o  m
        pg.grabPixels();
    } catch (InterruptedException e) {
        log.warn("interrupted waiting for pixels!");
    }

    mimeType = "image/";
    if (!(pg.getColorModel() instanceof IndexColorModel))
        mimeType += ImageExternalizer.FORMAT_PNG;
    else
        mimeType += ImageExternalizer.FORMAT_GIF;

    return mimeType;
}

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From source file:de.laures.cewolf.util.ImageHelper.java

public static boolean hasAlpha(Image image) {
    if (image instanceof BufferedImage) {
        return ((BufferedImage) image).getColorModel().hasAlpha();
    }/*  w w w . jav a  2  s.  c om*/
    PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
    try {
        pg.grabPixels();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    ColorModel cm = pg.getColorModel();
    if (cm == null) {
        return false;
    }
    return cm.hasAlpha();
}

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From source file:com.jaeksoft.searchlib.util.ImageUtils.java

public static boolean hasAlpha(Image image) throws InterruptedException {
    if (image instanceof BufferedImage)
        return ((BufferedImage) image).getColorModel().hasAlpha();
    PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
    pg.grabPixels();//  w  w  w .  j a  v a  2s. c o m
    return pg.getColorModel().hasAlpha();
}

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From source file:GifEncoder.java

/** Constructs a new GifEncoder using an 8-bit AWT Image.
 The image is assumed to be fully loaded. */
public GifEncoder(Image img) {
    width = img.getWidth(null);//w  w w. j  av  a2s.  c o m
    height = img.getHeight(null);
    pixels = new byte[width * height];
    PixelGrabber pg = new PixelGrabber(img, 0, 0, width, height, false);
    try {
        pg.grabPixels();
    } catch (InterruptedException e) {
        System.err.println(e);
    }
    ColorModel cm = pg.getColorModel();
    if (cm instanceof IndexColorModel) {
        pixels = (byte[]) (pg.getPixels());
        // hpm
        IndexColorModel icm = (IndexColorModel) cm;
        setTransparentPixel(icm.getTransparentPixel());
    } else
        throw new IllegalArgumentException("IMAGE_ERROR");
    IndexColorModel m = (IndexColorModel) cm;
    int mapSize = m.getMapSize();
    r = new byte[mapSize];
    g = new byte[mapSize];
    b = new byte[mapSize];
    m.getReds(r);
    m.getGreens(g);
    m.getBlues(b);
    interlace = false;
    pixelIndex = 0;
    numPixels = width * height;
}

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From source file:FontAlgo.java

private static TextualChar getTextualChar(char a_char) throws Throwable {
    BufferedImage bImg = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
    Graphics g = bImg.getGraphics();
    g.setColor(Color.green);// w  w  w.  j  a  v  a2  s  .  co m
    g.fillRect(0, 0, WIDTH, HEIGHT);

    g.setFont(appliedFont);
    g.setColor(Color.black);
    g.drawString(new String(new char[] { a_char }), 10, g.getFontMetrics().getHeight());
    PixelGrabber p = new PixelGrabber(bImg, 0, 0, WIDTH, HEIGHT, true);

    if (p.grabPixels()) {
        char[][] pattern = new char[WIDTH][HEIGHT];
        int baseColourPixel = 0, contrastColourPixel = 0, x1 = 0, x2 = 0, y1 = 0, y2 = 0;
        int[] pixels = (int[]) p.getPixels();
        baseColourPixel = pixels[0];
        // System.out.println("base: " + base);
        int xCounter = 0, yCounter = 0;
        for (int iPixel : pixels) {
            // System.out.println(iX + " - " + iY);
            if (isReverse) {
                pattern[xCounter][yCounter] = iPixel == baseColourPixel ? CHAR_TO_PATTERN : ' ';
            } else {
                pattern[xCounter][yCounter] = iPixel != baseColourPixel ? CHAR_TO_PATTERN : ' ';
            }

            yCounter++;
            if (yCounter > 49) {
                xCounter++;
                yCounter = 0;
            }

            if (contrastColourPixel == 0 && iPixel != baseColourPixel) {
                contrastColourPixel = iPixel;
                x1 = xCounter - 2;
                y1 = yCounter - 3;
                y2 = yCounter + 3;
            }

            if (contrastColourPixel == iPixel) {
                x2 = xCounter + 3;

                if (y1 > (yCounter - 3)) {
                    y1 = yCounter - 3;
                }

                if (y2 < (yCounter + 3)) {
                    y2 = yCounter + 3;
                }
            }
        }
        return new TextualChar(x1, x2, y1, y2, pattern);
    }
    return null;
}

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From source file:ro.nextreports.designer.util.ImageUtil.java

private static boolean hasAlpha(Image image) {
    // If buffered image, the color model is readily available
    if (image instanceof BufferedImage) {
        BufferedImage bimage = (BufferedImage) image;
        return bimage.getColorModel().hasAlpha();
    }//from w  w w  . j  ava2  s.  co m

    // Use a pixel grabber to retrieve the image's color model;
    // grabbing a single pixel is usually sufficient
    PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
    try {
        pg.grabPixels();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }

    // Get the image's color model
    ColorModel cm = pg.getColorModel();
    return cm.hasAlpha();
}

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From source file:com.xebia.visualreview.PixelComparator.java

private static PixelGrabber grabImage(File file) {
    try {/*  www  . java 2 s  . c o m*/
        return new PixelGrabber(loadImage(file), 0, 0, -1, -1, true);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

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From source file:ImageUtils.java

/**
 * Determines if the image has transparent pixels.
 * /*from   w  w  w  .  ja  v  a2  s .co m*/
 * @param image The image to check for transparent pixel.s
 * @return <code>true</code> of <code>false</code>, according to the result
 */
public static boolean hasAlpha(Image image) {
    try {
        PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
        pg.grabPixels();

        return pg.getColorModel().hasAlpha();
    } catch (InterruptedException e) {
        return false;
    }
}

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From source file:org.yccheok.jstock.gui.Utils.java

private static boolean hasAlpha(Image image) {
    // If buffered image, the color model is readily available
    if (image instanceof BufferedImage) {
        BufferedImage bimage = (BufferedImage) image;
        return bimage.getColorModel().hasAlpha();
    }/* w ww. j  a  v a 2 s . c o m*/

    // Use a pixel grabber to retrieve the image's color model;
    // grabbing a single pixel is usually sufficient
    PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
    try {
        pg.grabPixels();
    } catch (InterruptedException e) {
    }

    // Get the image's color model
    ColorModel cm = pg.getColorModel();

    return cm.hasAlpha();
}

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From source file:com.aurel.track.attachment.AttachBL.java

private static boolean hasAlpha(Image image) {
    // If buffered image, the color model is readily available
    if (image instanceof BufferedImage) {
        BufferedImage bimage = (BufferedImage) image;
        return bimage.getColorModel().hasAlpha();
    }//from  ww w.  jav a  2  s . c o m

    // grabbing a single pixel is usually sufficient
    PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
    try {
        pg.grabPixels();
    } catch (InterruptedException e) {
    }

    // Get the image's color model
    ColorModel cm = pg.getColorModel();
    return cm.hasAlpha();
}

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