Example usage for java.awt.image SampleModel getTransferType

Introduction

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

Prototype

public int getTransferType() 

Source Link

Document

Returns the TransferType used to transfer pixels via the getDataElements and setDataElements methods.

Usage

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

/**
 * Builds a new tile, eventually recycling the data array backing it
 *///from  ww w  . j  a v  a2  s. c  om
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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