Example usage for java.awt.image.renderable ParameterBlock getSource

Introduction

In this page you can find the example usage for java.awt.image.renderable ParameterBlock getSource.

Prototype

public Object getSource(int index) 

Source Link

Document

Returns a source as a general Object.

Usage

From source file:fr.gael.drb.cortex.topic.sentinel3.jai.operator.QuicklookSlstrRIF.java

/**
 * Should create a new instance of <code>QuicklookSlstrOpImage</code> in the 
 * rendered layer./*from w  ww.  ja va 2 s .co m*/
 * This operator could be called by chunks of images.
 * A set of additional information are required to compute the pixels 
 * adjustment such as sun azimuth/elevation and detectors... The methods to
 * extract these informations are also provided here before. 
 * 
 * @param paramBlock The three R/G/B sources images to be "Merged" together
 * to produce the Quicklook.
 * @param renderHints Optionally contains destination image layout.
 */
public RenderedImage create(ParameterBlock paramBlock, RenderingHints hints) {
    long start = System.currentTimeMillis();
    RenderedImage computed_image = null;

    DrbImage red = (DrbImage) paramBlock.getSource(4); // S5
    DrbImage green = (DrbImage) paramBlock.getSource(2); // S3
    DrbImage blue = (DrbImage) paramBlock.getSource(1); // S2

    PixelCorrection[] pc = (PixelCorrection[]) paramBlock.getObjectParameter(0);
    PixelCorrection red_correction = pc != null ? pc[0] : null;
    PixelCorrection green_correction = pc != null ? pc[1] : null;
    PixelCorrection blue_correction = pc != null ? pc[2] : null;

    try {
        computed_image = naturalColors(red.getData(), red_correction, green.getData(), green_correction,
                blue.getData(), blue_correction);
    } catch (Exception e) {
        // Image access problem: try to reprocess this other bands
        LOGGER.info("Natural color band looks bad. Trying S8...");
        DrbImage image = (DrbImage) paramBlock.getSource(7); // S8
        PixelCorrection corr = pc != null ? pc[3] : null;
        try {
            computed_image = grayScaleBand(image.getData(), corr, true);
        } catch (Exception e1) {
            // S8 also bad band: try with S9...
            LOGGER.info("Thermal band S8 looks bad. Trying S9...");
            image = (DrbImage) paramBlock.getSource(8); // S9
            corr = pc != null ? pc[4] : null;
            try {
                computed_image = grayScaleBand(image.getData(), corr, false);
            } catch (Exception e2) {
                throw new UnsupportedOperationException("Image cannot be processed (" + e1.getMessage() + ").",
                        e2);
            }
        }
    }

    LOGGER.info("Quicklook generated in " + (System.currentTimeMillis() - start) / 1000 + " secs");

    return computed_image;
}

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