Java DataBuffer类代码示例

import java.awt.image.DataBuffer; //导入依赖的package包/类
private static void testSizeEquality() {
    // test with different size for cmap.
    IndexColorModel model1 = new IndexColorModel(8, 4,
            new int[] {1, 2, 3, 4},
            0, true, -1, DataBuffer.TYPE_BYTE);
    IndexColorModel model2 = new IndexColorModel(8, 3,
            new int[] {1, 2, 3},
            0, true, -1, DataBuffer.TYPE_BYTE);
    if (model1.equals(model2)) {
        throw new RuntimeException("equals() method is determining"
                + " Map size equality improperly");
    }
    if (model2.equals(model1)) {
        throw new RuntimeException("equals() method is determining"
                + " Map size equality improperly");
    }
}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
public Image makeImage(TestEnvironment env, int w, int h) {
    BufferedImage img = new BufferedImage(w, h, type);
    if (unmanaged) {
        DataBuffer db = img.getRaster().getDataBuffer();
        if (db instanceof DataBufferInt) {
            ((DataBufferInt)db).getData();
        } else if (db instanceof DataBufferShort) {
            ((DataBufferShort)db).getData();
        } else if (db instanceof DataBufferByte) {
            ((DataBufferByte)db).getData();
        } else {
            try {
                img.setAccelerationPriority(0.0f);
            } catch (Throwable e) {}
        }
    }
    return img;
}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
private static BufferedImage makeUnmanagedBI(GraphicsConfiguration gc,
                                             int type) {
    BufferedImage img = gc.createCompatibleImage(SIZE, SIZE, type);
    Graphics2D g2d = img.createGraphics();
    g2d.setColor(RGB);
    g2d.fillRect(0, 0, SIZE, SIZE);
    g2d.dispose();
    final DataBuffer db = img.getRaster().getDataBuffer();
    if (db instanceof DataBufferInt) {
        ((DataBufferInt) db).getData();
    } else if (db instanceof DataBufferShort) {
        ((DataBufferShort) db).getData();
    } else if (db instanceof DataBufferByte) {
        ((DataBufferByte) db).getData();
    } else {
        try {
            img.setAccelerationPriority(0.0f);
        } catch (final Throwable ignored) {
        }
    }
    return img;
}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
static String getDTName(int dType) {
    switch(dType) {
        case DataBuffer.TYPE_BYTE:
            return "TYPE_BYTE";
        case DataBuffer.TYPE_DOUBLE:
            return "TYPE_DOUBLE";
        case DataBuffer.TYPE_FLOAT:
            return "TYPE_FLOAT";
        case DataBuffer.TYPE_INT:
            return "TYPE_INT";
        case DataBuffer.TYPE_SHORT:
            return "TYPE_SHORT";
        case DataBuffer.TYPE_USHORT:
            return "TYPE_USHORT";
        case DataBuffer.TYPE_UNDEFINED:
            return "TYPE_UNDEFINED";
    }
    return "UNKNOWN";
}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
@Override
public ColorModel getColorModel(int transparency) {
    switch (transparency) {
    case Transparency.OPAQUE:
        // REMIND: once the ColorModel spec is changed, this should be
        //         an opaque premultiplied DCM...
        return new DirectColorModel(24, 0xff0000, 0xff00, 0xff);
    case Transparency.BITMASK:
        return new DirectColorModel(25, 0xff0000, 0xff00, 0xff, 0x1000000);
    case Transparency.TRANSLUCENT:
        ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
        return new DirectColorModel(cs, 32,
                                    0xff0000, 0xff00, 0xff, 0xff000000,
                                    true, DataBuffer.TYPE_INT);
    default:
        return null;
    }
}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
public static void main(String[] args) {
    SampleModel sm = new ComponentSampleModel(dataType, width, height, 4, width * 4, new int[] { 0, 1, 2, 3 } );

    DataBuffer db = sm.createDataBuffer();
    Object o = null;

    boolean testPassed = false;
    try {
        o = sm.getDataElements(Integer.MAX_VALUE, 0, 1, 1, o, db);
    } catch (ArrayIndexOutOfBoundsException e) {
        System.out.println(e.getMessage());
        testPassed = true;
    }

    if (!testPassed) {
        throw new RuntimeException("Excpected excprion was not thrown.");
    }
}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
public static long getBandSize(SampleModel sm) {
    int elementSize = DataBuffer.getDataTypeSize(sm.getDataType());

    if (sm instanceof ComponentSampleModel) {
        ComponentSampleModel csm = (ComponentSampleModel)sm;
        int pixelStride = csm.getPixelStride();
        int scanlineStride = csm.getScanlineStride();
        long size = Math.min(pixelStride, scanlineStride);

        if (pixelStride > 0)
            size += pixelStride * (sm.getWidth() - 1);
        if (scanlineStride > 0)
            size += scanlineStride * (sm.getHeight() - 1);
        return size * ((elementSize + 7) / 8);
    } else
        return getTileSize(sm);
}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
private static BufferedImage makeUnmanagedBI() {
    final BufferedImage bi = new BufferedImage(500, 200, TYPE_INT_ARGB);
    final DataBuffer db = bi.getRaster().getDataBuffer();
    if (db instanceof DataBufferInt) {
        ((DataBufferInt) db).getData();
    } else if (db instanceof DataBufferShort) {
        ((DataBufferShort) db).getData();
    } else if (db instanceof DataBufferByte) {
        ((DataBufferByte) db).getData();
    } else {
        try {
            bi.setAccelerationPriority(0.0f);
        } catch (final Throwable ignored) {
        }
    }
    return bi;
}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
public static int getElementSize(SampleModel sm) {
    int elementSize = DataBuffer.getDataTypeSize(sm.getDataType());

    if (sm instanceof MultiPixelPackedSampleModel) {
        MultiPixelPackedSampleModel mppsm =
            (MultiPixelPackedSampleModel)sm;
        return mppsm.getSampleSize(0) * mppsm.getNumBands();
    } else if (sm instanceof ComponentSampleModel) {
        return sm.getNumBands() * elementSize;
    } else if (sm instanceof SinglePixelPackedSampleModel) {
        return elementSize;
    }

    return elementSize * sm.getNumBands();

}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
private static void testValidPixelsEquality() {
    // test with different valid pixels.
    /*
     * In setRGBs() function of IndexColorModel we override
     * transparent_index value to map to pixel value if alpha is 0x00
     * so we should have atleast minimum alpha value to verify
     * equality of validBits thats why we have color value as
     * 16777216(2 ^ 24).
     */
    int color = 16777216;
    IndexColorModel model1 = new IndexColorModel(8, 3, new int[] {color,
            color, color}, 0, DataBuffer.TYPE_BYTE, new BigInteger("1"));
    IndexColorModel model2 = new IndexColorModel(8, 3, new int[] {color,
            color, color}, 0, DataBuffer.TYPE_BYTE, new BigInteger("2"));
    if (model1.equals(model2)) {
        throw new RuntimeException("equals() method is determining"
                + " Valid pixels equality improperly");
    }
    if (model2.equals(model1)) {
        throw new RuntimeException("equals() method is determining"
                + " Valid pixels equality improperly");
    }
}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
/**
  * Create a data buffer of a particular type.
  *
  * @param dataType the desired data type of the buffer.
  * @param size the size of the data buffer bank
  * @param numBanks the number of banks the buffer should have
  */
 public static DataBuffer createBuffer(int dataType, int size, int numBanks)
 {
   switch (dataType)
     {
     case DataBuffer.TYPE_BYTE:
return new DataBufferByte(size, numBanks);
     case DataBuffer.TYPE_SHORT:
return new DataBufferShort(size, numBanks);
     case DataBuffer.TYPE_USHORT:
return new DataBufferUShort(size, numBanks);
     case DataBuffer.TYPE_INT:
return new DataBufferInt(size, numBanks);
     case DataBuffer.TYPE_FLOAT:
return new DataBufferFloat(size, numBanks);
     case DataBuffer.TYPE_DOUBLE:
return new DataBufferDouble(size, numBanks);
     default:
throw new UnsupportedOperationException();
     }
 }
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
private static void testConstructor7() {
    /*
     * verify equality with constructor
     * IndexColorModel(int bits, int size, int[] cmap, int start,
     * int transferType, BigInteger validBits)
     */
    /*
     * In setRGBs() function of IndexColorModel we override
     * transparent_index value to map to pixel value if alpha is 0x00
     * so we should have atleast minimum alpha value to keep
     * both model1 and model2 same.
     */
    int color = 16777216;
    IndexColorModel model1 = new IndexColorModel(8, 3, new int[] {color,
            color, color}, 0, DataBuffer.TYPE_BYTE, new BigInteger("1"));
    IndexColorModel model2 = new IndexColorModel(8, 3, new int[] {color,
            color, color}, 0, DataBuffer.TYPE_BYTE, new BigInteger("1"));
    verifyEquals(model1, model2);
}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
/**
 * @param windowWidth
 * @param windowHeight
 * @param pBuffer
 * @param windowSize
 * @param backgroundTransparent
 * @return an Image
 */
static Object allocateRgbImage(int windowWidth, int windowHeight,
                               int[] pBuffer, int windowSize,
                               boolean backgroundTransparent) {
  //backgroundTransparent not working with antialiasDisplay. I have no idea why. BH 9/24/08
  /* DEAD CODE   if (false && backgroundTransparent)
        return new BufferedImage(
            rgbColorModelT,
            Raster.createWritableRaster(
                new SinglePixelPackedSampleModel(
                    DataBuffer.TYPE_INT,
                    windowWidth,
                    windowHeight,
                    sampleModelBitMasksT), 
                new DataBufferInt(pBuffer, windowSize),
                null),
            false, 
            null);
  */
  return new BufferedImage(rgbColorModel, Raster.createWritableRaster(
      new SinglePixelPackedSampleModel(DataBuffer.TYPE_INT, windowWidth,
          windowHeight, sampleModelBitMasks), new DataBufferInt(pBuffer,
          windowSize), null), false, null);
}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
/** Creates a new instance of CSampleModel */
public CSampleModel(int width, int height) {
    super (DataBuffer.TYPE_INT, width, height, MASKS);
    this.buf = buf;
    this.width = width;
    this.height = height;
}
 

import java.awt.image.DataBuffer; //导入依赖的package包/类
@Override
public DataBuffer convert(FieldAccessor fa, Instance instance) throws FieldAccessor.InvalidFieldException {
    int size = fa.getInt(instance, "size");                        // NOI18N
    int[] offsets = fa.getIntArray(instance, "offsets", false);      // NOI18N
    //int[] data = fa.getIntArray(instance, "data", false);     // NOI18N
    int[][] bankdata = fa.getIntArray2(instance, "bankdata", false); // NOI18N
    return new DataBufferInt(bankdata, size, offsets);
}