Examples with ParameterBlock java.awt.image.renderable.ParameterBlock used on opensource projects

Example 26 with ParameterBlock

use of java.awt.image.renderable.ParameterBlock in project digilib by robcast.

the class JAIDocuImage method writeImage.

/* Write the current image to an OutputStream. */
public void writeImage(String mt, OutputStream ostream) throws ImageOpException, FileOpException {
    try {
        // setup output
        ParameterBlock pb3 = new ParameterBlock();
        pb3.addSource(img);
        pb3.add(ostream);
        if (mt == "image/jpeg") {
            pb3.add("JPEG");
        } else if (mt == "image/png") {
            pb3.add("PNG");
        } else {
            // unknown mime type
            throw new ImageOpException("Unknown mime type: " + mt);
        }
        // render output
        JAI.create("encode", pb3);
    } catch (RuntimeException e) {
        // JAI likes to throw RuntimeExceptions
        throw new FileOpException("Error writing image: " + e);
    }
}

Example 27 with ParameterBlock

use of java.awt.image.renderable.ParameterBlock in project digilib by robcast.

the class JAIDocuImage method rotate.

/* rotates the current image */
public void rotate(double angle) throws ImageOpException {
    RenderedImage rotImg;
    // convert degrees to radians
    double rangle = Math.toRadians(angle);
    double x = img.getWidth() / 2;
    double y = img.getHeight() / 2;
    // optimize rotation by right angles
    TransposeType rotOp = null;
    if (Math.abs(angle - 0) < epsilon) {
        // 0 degree
        return;
    } else if (Math.abs(angle - 90) < epsilon) {
        // 90 degree
        rotOp = TransposeDescriptor.ROTATE_90;
    } else if (Math.abs(angle - 180) < epsilon) {
        // 180 degree
        rotOp = TransposeDescriptor.ROTATE_180;
    } else if (Math.abs(angle - 270) < epsilon) {
        // 270 degree
        rotOp = TransposeDescriptor.ROTATE_270;
    } else if (Math.abs(angle - 360) < epsilon) {
        // 360 degree
        return;
    }
    if (rotOp != null) {
        // use Transpose operation
        ParameterBlock pb = new ParameterBlock();
        pb.addSource(img);
        pb.add(rotOp);
        rotImg = JAI.create("transpose", pb);
    } else {
        // setup "normal" rotation
        ParameterBlock param = new ParameterBlock();
        param.addSource(img);
        param.add((float) x);
        param.add((float) y);
        param.add((float) rangle);
        param.add(interpol);
        rotImg = JAI.create("rotate", param);
    }
    logger.debug("ROTATE: " + x + "," + y + ", " + angle + " (" + rangle + ")" + " ->" + rotImg.getWidth() + "x" + rotImg.getHeight());
    img = rotImg;
}

Example 28 with ParameterBlock

use of java.awt.image.renderable.ParameterBlock in project digilib by robcast.

the class JAIDocuImage method enhanceRGB.

/*
	 * (non-Javadoc)
	 * 
	 * @see digilib.image.DocuImage#enhanceRGB(float[], float[])
	 */
public void enhanceRGB(float[] rgbm, float[] rgba) throws ImageOpException {
    RenderedImage enhImg;
    int nb = rgbm.length;
    double[] ma = new double[nb];
    double[] aa = new double[nb];
    for (int i = 0; i < nb; i++) {
        ma[i] = rgbm[i];
        aa[i] = rgba[i];
    }
    // use Rescale operation
    ParameterBlock param = new ParameterBlock();
    param.addSource(img);
    param.add(ma);
    param.add(aa);
    enhImg = JAI.create("rescale", param);
    logger.debug("ENHANCE_RGB: *" + rgbm + ", +" + rgba + " ->" + enhImg.getWidth() + "x" + enhImg.getHeight());
    img = enhImg;
}

Example 29 with ParameterBlock

use of java.awt.image.renderable.ParameterBlock in project digilib by robcast.

the class JAIDocuImage method enhance.

/* contrast and brightness enhancement */
public void enhance(float mult, float add) throws ImageOpException {
    RenderedImage enhImg;
    double[] ma = { mult };
    double[] aa = { add };
    // use Rescale operation
    ParameterBlock param = new ParameterBlock();
    param.addSource(img);
    param.add(ma);
    param.add(aa);
    enhImg = JAI.create("rescale", param);
    logger.debug("ENHANCE: *" + mult + ", +" + add + " ->" + enhImg.getWidth() + "x" + enhImg.getHeight());
    // DEBUG
    img = enhImg;
}