Example usage for javax.imageio ImageReader readTile

Introduction

In this page you can find the example usage for javax.imageio ImageReader readTile.

Prototype

public BufferedImage readTile(int imageIndex, int tileX, int tileY) throws IOException 

Source Link

Document

Reads the tile indicated by the tileX and tileY arguments, returning it as a BufferedImage .

Usage

From source file:org.deegree.tile.persistence.geotiff.GeoTIFFTile.java

@Override
public BufferedImage getAsImage() throws TileIOException {
    ImageReader reader = null;
    try {/*from   w w w  .  j  a v a2 s .com*/
        reader = (ImageReader) readerPool.borrowObject();
        BufferedImage img = reader.readTile(imageIndex, x, y);
        if (img.getWidth() != sizeX || img.getHeight() != sizeY) {
            Hashtable<Object, Object> table = new Hashtable<Object, Object>();
            String[] props = img.getPropertyNames();
            if (props != null) {
                for (String p : props) {
                    table.put(p, img.getProperty(p));
                }
            }
            BufferedImage img2 = new BufferedImage(img.getColorModel(),
                    img.getData().createCompatibleWritableRaster(sizeX, sizeY), img.isAlphaPremultiplied(),
                    table);
            Graphics2D g = img2.createGraphics();
            g.drawImage(img, 0, 0, null);
            g.dispose();
            img = img2;
        }
        return img;
    } catch (Exception e) {
        throw new TileIOException("Error retrieving image: " + e.getMessage(), e);
    } finally {
        try {
            readerPool.returnObject(reader);
        } catch (Exception e) {
            // ignore closing error
        }
    }
}

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