Example usage for java.awt.image MultiPixelPackedSampleModel getScanlineStride

Introduction

In this page you can find the example usage for java.awt.image MultiPixelPackedSampleModel getScanlineStride.

Prototype

public int getScanlineStride() 

Source Link

Document

Returns the scanline stride.

Usage

From source file:org.apache.fop.render.pcl.PCLGenerator.java

/**
 * Paint a bitmap at the current cursor position. The bitmap must be a monochrome
 * (1-bit) bitmap image.//from  w  w  w.ja va  2  s . com
 * @param img the bitmap image (must be 1-bit b/w)
 * @param resolution the resolution of the image (must be a PCL resolution)
 * @throws IOException In case of an I/O error
 */
public void paintMonochromeBitmap(RenderedImage img, int resolution) throws IOException {
    if (!isValidPCLResolution(resolution)) {
        throw new IllegalArgumentException("Invalid PCL resolution: " + resolution);
    }
    boolean monochrome = isMonochromeImage(img);
    if (!monochrome) {
        throw new IllegalArgumentException("img must be a monochrome image");
    }

    setRasterGraphicsResolution(resolution);
    writeCommand("*r0f" + img.getHeight() + "t" + img.getWidth() + "s1A");
    Raster raster = img.getData();

    Encoder encoder = new Encoder(img);
    // Transfer graphics data
    int imgw = img.getWidth();
    IndexColorModel cm = (IndexColorModel) img.getColorModel();
    if (cm.getTransferType() == DataBuffer.TYPE_BYTE) {
        DataBufferByte dataBuffer = (DataBufferByte) raster.getDataBuffer();
        MultiPixelPackedSampleModel packedSampleModel = new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE,
                img.getWidth(), img.getHeight(), 1);
        if (img.getSampleModel().equals(packedSampleModel) && dataBuffer.getNumBanks() == 1) {
            //Optimized packed encoding
            byte[] buf = dataBuffer.getData();
            int scanlineStride = packedSampleModel.getScanlineStride();
            int idx = 0;
            int c0 = toGray(cm.getRGB(0));
            int c1 = toGray(cm.getRGB(1));
            boolean zeroIsWhite = c0 > c1;
            for (int y = 0, maxy = img.getHeight(); y < maxy; y++) {
                for (int x = 0, maxx = scanlineStride; x < maxx; x++) {
                    if (zeroIsWhite) {
                        encoder.add8Bits(buf[idx]);
                    } else {
                        encoder.add8Bits((byte) ~buf[idx]);
                    }
                    idx++;
                }
                encoder.endLine();
            }
        } else {
            //Optimized non-packed encoding
            for (int y = 0, maxy = img.getHeight(); y < maxy; y++) {
                byte[] line = (byte[]) raster.getDataElements(0, y, imgw, 1, null);
                for (int x = 0, maxx = imgw; x < maxx; x++) {
                    encoder.addBit(line[x] == 0);
                }
                encoder.endLine();
            }
        }
    } else {
        //Safe but slow fallback
        for (int y = 0, maxy = img.getHeight(); y < maxy; y++) {
            for (int x = 0, maxx = imgw; x < maxx; x++) {
                int sample = raster.getSample(x, y, 0);
                encoder.addBit(sample == 0);
            }
            encoder.endLine();
        }
    }

    // End raster graphics
    writeCommand("*rB");
}

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

/**
 * Builds a new tile, eventually recycling the data array backing it
 *//* w w w .j  av a  2  s  .  c  o  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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