Example usage for java.awt.image SampleModel createDataBuffer

Introduction

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

Prototype

public abstract DataBuffer createDataBuffer();

Source Link

Document

Creates a DataBuffer that corresponds to this SampleModel.

Usage

From source file:org.geoserver.jai.ConcurrentTileFactory.java

/**
 * Builds a new tile, eventually recycling the data array backing it
 *///from w  w  w.ja  v a2s  .co m
public WritableRaster createTile(SampleModel sampleModel, Point location) {
    // sanity checks
    if (sampleModel == null) {
        throw new NullPointerException("sampleModel cannot be null");
    }
    if (location == null) {
        location = new Point(0, 0);
    }

    DataBuffer db = null;

    // get the three elements making the key into the recycled array map
    int type = sampleModel.getTransferType();
    long numBanks = 0;
    long size = 0;
    if (sampleModel instanceof ComponentSampleModel) {
        ComponentSampleModel csm = (ComponentSampleModel) sampleModel;
        numBanks = getNumBanksCSM(csm);
        size = getBufferSizeCSM(csm);
    } else if (sampleModel instanceof MultiPixelPackedSampleModel) {
        MultiPixelPackedSampleModel mppsm = (MultiPixelPackedSampleModel) sampleModel;
        numBanks = 1;
        int dataTypeSize = DataBuffer.getDataTypeSize(type);
        size = mppsm.getScanlineStride() * mppsm.getHeight()
                + (mppsm.getDataBitOffset() + dataTypeSize - 1) / dataTypeSize;
    } else if (sampleModel instanceof SinglePixelPackedSampleModel) {
        SinglePixelPackedSampleModel sppsm = (SinglePixelPackedSampleModel) sampleModel;
        numBanks = 1;
        size = sppsm.getScanlineStride() * (sppsm.getHeight() - 1) + sppsm.getWidth();
    }

    if (size > 0) {
        // try to build a new data buffer starting from 
        Object array = recycledArrays.getRecycledArray(type, numBanks, size);
        if (array != null) {
            switch (type) {
            case DataBuffer.TYPE_BYTE: {
                byte[][] bankData = (byte[][]) array;
                for (int i = 0; i < numBanks; i++) {
                    Arrays.fill(bankData[i], (byte) 0);
                }
                db = new DataBufferByte(bankData, (int) size);
            }
                break;
            case DataBuffer.TYPE_USHORT: {
                short[][] bankData = (short[][]) array;
                for (int i = 0; i < numBanks; i++) {
                    Arrays.fill(bankData[i], (short) 0);
                }
                db = new DataBufferUShort(bankData, (int) size);
            }
                break;
            case DataBuffer.TYPE_SHORT: {
                short[][] bankData = (short[][]) array;
                for (int i = 0; i < numBanks; i++) {
                    Arrays.fill(bankData[i], (short) 0);
                }
                db = new DataBufferShort(bankData, (int) size);
            }
                break;
            case DataBuffer.TYPE_INT: {
                int[][] bankData = (int[][]) array;
                for (int i = 0; i < numBanks; i++) {
                    Arrays.fill(bankData[i], 0);
                }
                db = new DataBufferInt(bankData, (int) size);
            }
                break;
            case DataBuffer.TYPE_FLOAT: {
                float[][] bankData = (float[][]) array;
                for (int i = 0; i < numBanks; i++) {
                    Arrays.fill(bankData[i], 0.0F);
                }
                db = DataBufferUtils.createDataBufferFloat(bankData, (int) size);
            }
                break;
            case DataBuffer.TYPE_DOUBLE: {
                double[][] bankData = (double[][]) array;
                for (int i = 0; i < numBanks; i++) {
                    Arrays.fill(bankData[i], 0.0);
                }
                db = DataBufferUtils.createDataBufferDouble(bankData, (int) size);
            }
                break;
            default:
                throw new IllegalArgumentException("Unknown array type");
            }
        }
    }

    if (db == null) {
        db = sampleModel.createDataBuffer();
    }

    return Raster.createWritableRaster(sampleModel, db, location);
}

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