Example usage for java.awt.image Raster createChild

Introduction

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

Prototype

public Raster createChild(int parentX, int parentY, int width, int height, int childMinX, int childMinY,
        int[] bandList) 

Source Link

Document

Returns a new Raster which shares all or part of this Raster's DataBuffer.

Usage

From source file:org.esa.s2tbx.dataio.jp2.internal.JP2TileOpImage.java

private void computeRectDirect(WritableRaster dest, Rectangle destRect) {
    try (OpenJP2Decoder decoder = new OpenJP2Decoder(this.cacheDir, this.imageFile, this.bandIndex,
            this.dataType, getLevel(), 20, tileIndex)) {
        Raster readTileImage = null;
        final DataBuffer dataBuffer = dest.getDataBuffer();
        int tileWidth = this.getTileWidth();
        int tileHeight = this.getTileHeight();
        final int fileTileX = destRect.x / tileLayout.tileWidth;
        final int fileTileY = destRect.y / tileLayout.tileHeight;
        int fileTileOriginX = destRect.x - fileTileX * tileLayout.tileWidth;
        int fileTileOriginY = destRect.y - fileTileY * tileLayout.tileHeight;
        Dimension dimensions = decoder.getImageDimensions();
        Rectangle fileTileRect = new Rectangle(0, 0, dimensions.width, dimensions.height);

        if (fileTileOriginX == 0 && tileLayout.tileWidth == tileWidth && fileTileOriginY == 0
                && tileLayout.tileHeight == tileHeight && tileWidth * tileHeight == dataBuffer.getSize()) {
            readTileImage = decoder.read(null);
        } else {//from   w w  w . ja v  a 2  s.  c  om
            final Rectangle tileRect = new Rectangle(fileTileOriginX, fileTileOriginY, tileWidth, tileHeight);
            final Rectangle intersection = fileTileRect.intersection(tileRect);
            if (!intersection.isEmpty()) {
                readTileImage = decoder.read(intersection);
            }
        }
        if (readTileImage != null) {
            Raster readBandRaster = readTileImage.createChild(0, 0, readTileImage.getWidth(),
                    readTileImage.getHeight(), 0, 0, bands);
            dest.setDataElements(dest.getMinX(), dest.getMinY(), readBandRaster);
        }

    } catch (IOException e) {
        logger.severe(e.getMessage());
    }
}

---