ImageUtilpublic class ImageUtil extends Object
| Methods Summary |
|---|
| public static final void | canEncodeImage(javax.imageio.ImageWriter writer, javax.imageio.ImageTypeSpecifier type)Checks that the provided ImageWriter can encode
the provided ImageTypeSpecifier or not. If not, an
IIOException will be thrown.
ImageWriterSpi spi = writer.getOriginatingProvider();
if(type != null && spi != null && !spi.canEncodeImage(type)) {
throw new IIOException(I18N.getString("ImageUtil2")+" "+
writer.getClass().getName());
}
| | public static final void | canEncodeImage(javax.imageio.ImageWriter writer, java.awt.image.ColorModel colorModel, java.awt.image.SampleModel sampleModel)Checks that the provided ImageWriter can encode
the provided ColorModel and SampleModel.
If not, an IIOException will be thrown.
ImageTypeSpecifier type = null;
if (colorModel != null && sampleModel != null)
type = new ImageTypeSpecifier(colorModel, sampleModel);
canEncodeImage(writer, type);
| | public static java.lang.String | convertObjectToString(java.lang.Object obj)Converts the provided object to String
if (obj == null)
return "";
String s = "";
if (obj instanceof byte[]) {
byte[] bArray = (byte[])obj;
for (int i = 0; i < bArray.length; i++)
s += bArray[i] + " ";
return s;
}
if (obj instanceof int[]) {
int[] iArray = (int[])obj;
for (int i = 0; i < iArray.length; i++)
s += iArray[i] + " " ;
return s;
}
if (obj instanceof short[]) {
short[] sArray = (short[])obj;
for (int i = 0; i < sArray.length; i++)
s += sArray[i] + " " ;
return s;
}
return obj.toString();
| | public static final java.awt.image.ColorModel | createColorModel(java.awt.image.SampleModel sampleModel)Creates a ColorModel that may be used with the
specified SampleModel. If a suitable
ColorModel cannot be found, this method returns
null.
Suitable ColorModels are guaranteed to exist
for all instances of ComponentSampleModel.
For 1- and 3- banded SampleModels, the returned
ColorModel will be opaque. For 2- and 4-banded
SampleModels, the output will use alpha transparency
which is not premultiplied. 1- and 2-banded data will use a
grayscale ColorSpace, and 3- and 4-banded data a sRGB
ColorSpace. Data with 5 or more bands will have a
BogusColorSpace.
An instance of DirectColorModel will be created for
instances of SinglePixelPackedSampleModel with no more
than 4 bands.
An instance of IndexColorModel will be created for
instances of MultiPixelPackedSampleModel. The colormap
will be a grayscale ramp with 1 << numberOfBits
entries ranging from zero to at most 255.
// Check the parameter.
if(sampleModel == null) {
throw new IllegalArgumentException("sampleModel == null!");
}
// Get the data type.
int dataType = sampleModel.getDataType();
// Check the data type
switch(dataType) {
case DataBuffer.TYPE_BYTE:
case DataBuffer.TYPE_USHORT:
case DataBuffer.TYPE_SHORT:
case DataBuffer.TYPE_INT:
case DataBuffer.TYPE_FLOAT:
case DataBuffer.TYPE_DOUBLE:
break;
default:
// Return null for other types.
return null;
}
// The return variable.
ColorModel colorModel = null;
// Get the sample size.
int[] sampleSize = sampleModel.getSampleSize();
// Create a Component ColorModel.
if(sampleModel instanceof ComponentSampleModel) {
// Get the number of bands.
int numBands = sampleModel.getNumBands();
// Determine the color space.
ColorSpace colorSpace = null;
if(numBands <= 2) {
colorSpace = ColorSpace.getInstance(ColorSpace.CS_GRAY);
} else if(numBands <= 4) {
colorSpace = ColorSpace.getInstance(ColorSpace.CS_sRGB);
} else {
colorSpace = new BogusColorSpace(numBands);
}
boolean hasAlpha = (numBands == 2) || (numBands == 4);
boolean isAlphaPremultiplied = false;
int transparency = hasAlpha ?
Transparency.TRANSLUCENT : Transparency.OPAQUE;
colorModel = new ComponentColorModel(colorSpace,
sampleSize,
hasAlpha,
isAlphaPremultiplied,
transparency,
dataType);
} else if (sampleModel.getNumBands() <= 4 &&
sampleModel instanceof SinglePixelPackedSampleModel) {
SinglePixelPackedSampleModel sppsm =
(SinglePixelPackedSampleModel)sampleModel;
int[] bitMasks = sppsm.getBitMasks();
int rmask = 0;
int gmask = 0;
int bmask = 0;
int amask = 0;
int numBands = bitMasks.length;
if (numBands <= 2) {
rmask = gmask = bmask = bitMasks[0];
if (numBands == 2) {
amask = bitMasks[1];
}
} else {
rmask = bitMasks[0];
gmask = bitMasks[1];
bmask = bitMasks[2];
if (numBands == 4) {
amask = bitMasks[3];
}
}
int bits = 0;
for (int i = 0; i < sampleSize.length; i++) {
bits += sampleSize[i];
}
return new DirectColorModel(bits, rmask, gmask, bmask, amask);
} else if(sampleModel instanceof MultiPixelPackedSampleModel) {
// Load the colormap with a ramp.
int bitsPerSample = sampleSize[0];
int numEntries = 1 << bitsPerSample;
byte[] map = new byte[numEntries];
for (int i = 0; i < numEntries; i++) {
map[i] = (byte)(i*255/(numEntries - 1));
}
colorModel = new IndexColorModel(bitsPerSample, numEntries,
map, map, map);
}
return colorModel;
| | public static java.awt.image.ColorModel | createColorModel(java.awt.color.ColorSpace colorSpace, java.awt.image.SampleModel sampleModel)
ColorModel colorModel = null;
if(sampleModel == null) {
throw new IllegalArgumentException(I18N.getString("ImageUtil1"));
}
int numBands = sampleModel.getNumBands();
if (numBands < 1 || numBands > 4) {
return null;
}
int dataType = sampleModel.getDataType();
if (sampleModel instanceof ComponentSampleModel) {
if (dataType < DataBuffer.TYPE_BYTE ||
//dataType == DataBuffer.TYPE_SHORT ||
dataType > DataBuffer.TYPE_DOUBLE) {
return null;
}
if (colorSpace == null)
colorSpace =
numBands <= 2 ?
ColorSpace.getInstance(ColorSpace.CS_GRAY) :
ColorSpace.getInstance(ColorSpace.CS_sRGB);
boolean useAlpha = (numBands == 2) || (numBands == 4);
int transparency = useAlpha ?
Transparency.TRANSLUCENT : Transparency.OPAQUE;
boolean premultiplied = false;
int dataTypeSize = DataBuffer.getDataTypeSize(dataType);
int[] bits = new int[numBands];
for (int i = 0; i < numBands; i++) {
bits[i] = dataTypeSize;
}
colorModel = new ComponentColorModel(colorSpace,
bits,
useAlpha,
premultiplied,
transparency,
dataType);
} else if (sampleModel instanceof SinglePixelPackedSampleModel) {
SinglePixelPackedSampleModel sppsm =
(SinglePixelPackedSampleModel)sampleModel;
int[] bitMasks = sppsm.getBitMasks();
int rmask = 0;
int gmask = 0;
int bmask = 0;
int amask = 0;
numBands = bitMasks.length;
if (numBands <= 2) {
rmask = gmask = bmask = bitMasks[0];
if (numBands == 2) {
amask = bitMasks[1];
}
} else {
rmask = bitMasks[0];
gmask = bitMasks[1];
bmask = bitMasks[2];
if (numBands == 4) {
amask = bitMasks[3];
}
}
int[] sampleSize = sppsm.getSampleSize();
int bits = 0;
for (int i = 0; i < sampleSize.length; i++) {
bits += sampleSize[i];
}
if (colorSpace == null)
colorSpace = ColorSpace.getInstance(ColorSpace.CS_sRGB);
colorModel =
new DirectColorModel(colorSpace,
bits, rmask, gmask, bmask, amask,
false,
sampleModel.getDataType());
} else if (sampleModel instanceof MultiPixelPackedSampleModel) {
int bits =
((MultiPixelPackedSampleModel)sampleModel).getPixelBitStride();
int size = 1 << bits;
byte[] comp = new byte[size];
for (int i = 0; i < size; i++)
comp[i] = (byte)(255 * i / (size - 1));
colorModel = new IndexColorModel(bits, size, comp, comp, comp);
}
return colorModel;
| | public static long | getBandSize(java.awt.image.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);
| | public static int | getElementSize(java.awt.image.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();
| | public static byte[] | getPackedBinaryData(java.awt.image.Raster raster, java.awt.Rectangle rect)For the case of binary data (isBinary() returns
true), return the binary data as a packed byte array.
The data will be packed as eight bits per byte with no bit offset,
i.e., the first bit in each image line will be the left-most of the
first byte of the line. The line stride in bytes will be
(int)((getWidth()+7)/8). The length of the returned
array will be the line stride multiplied by getHeight()
SampleModel sm = raster.getSampleModel();
if(!isBinary(sm)) {
throw new IllegalArgumentException(I18N.getString("ImageUtil0"));
}
int rectX = rect.x;
int rectY = rect.y;
int rectWidth = rect.width;
int rectHeight = rect.height;
DataBuffer dataBuffer = raster.getDataBuffer();
int dx = rectX - raster.getSampleModelTranslateX();
int dy = rectY - raster.getSampleModelTranslateY();
MultiPixelPackedSampleModel mpp = (MultiPixelPackedSampleModel)sm;
int lineStride = mpp.getScanlineStride();
int eltOffset = dataBuffer.getOffset() + mpp.getOffset(dx, dy);
int bitOffset = mpp.getBitOffset(dx);
int numBytesPerRow = (rectWidth + 7)/8;
if(dataBuffer instanceof DataBufferByte &&
eltOffset == 0 && bitOffset == 0 &&
numBytesPerRow == lineStride &&
((DataBufferByte)dataBuffer).getData().length ==
numBytesPerRow*rectHeight) {
return ((DataBufferByte)dataBuffer).getData();
}
byte[] binaryDataArray = new byte[numBytesPerRow*rectHeight];
int b = 0;
if(bitOffset == 0) {
if(dataBuffer instanceof DataBufferByte) {
byte[] data = ((DataBufferByte)dataBuffer).getData();
int stride = numBytesPerRow;
int offset = 0;
for(int y = 0; y < rectHeight; y++) {
System.arraycopy(data, eltOffset,
binaryDataArray, offset,
stride);
offset += stride;
eltOffset += lineStride;
}
} else if(dataBuffer instanceof DataBufferShort ||
dataBuffer instanceof DataBufferUShort) {
short[] data = dataBuffer instanceof DataBufferShort ?
((DataBufferShort)dataBuffer).getData() :
((DataBufferUShort)dataBuffer).getData();
for(int y = 0; y < rectHeight; y++) {
int xRemaining = rectWidth;
int i = eltOffset;
while(xRemaining > 8) {
short datum = data[i++];
binaryDataArray[b++] = (byte)((datum >>> 8) & 0xFF);
binaryDataArray[b++] = (byte)(datum & 0xFF);
xRemaining -= 16;
}
if(xRemaining > 0) {
binaryDataArray[b++] = (byte)((data[i] >>> 8) & 0XFF);
}
eltOffset += lineStride;
}
} else if(dataBuffer instanceof DataBufferInt) {
int[] data = ((DataBufferInt)dataBuffer).getData();
for(int y = 0; y < rectHeight; y++) {
int xRemaining = rectWidth;
int i = eltOffset;
while(xRemaining > 24) {
int datum = data[i++];
binaryDataArray[b++] = (byte)((datum >>> 24) & 0xFF);
binaryDataArray[b++] = (byte)((datum >>> 16) & 0xFF);
binaryDataArray[b++] = (byte)((datum >>> 8) & 0xFF);
binaryDataArray[b++] = (byte)(datum & 0xFF);
xRemaining -= 32;
}
int shift = 24;
while(xRemaining > 0) {
binaryDataArray[b++] =
(byte)((data[i] >>> shift) & 0xFF);
shift -= 8;
xRemaining -= 8;
}
eltOffset += lineStride;
}
}
} else { // bitOffset != 0
if(dataBuffer instanceof DataBufferByte) {
byte[] data = ((DataBufferByte)dataBuffer).getData();
if((bitOffset & 7) == 0) {
int stride = numBytesPerRow;
int offset = 0;
for(int y = 0; y < rectHeight; y++) {
System.arraycopy(data, eltOffset,
binaryDataArray, offset,
stride);
offset += stride;
eltOffset += lineStride;
}
} else { // bitOffset % 8 != 0
int leftShift = bitOffset & 7;
int rightShift = 8 - leftShift;
for(int y = 0; y < rectHeight; y++) {
int i = eltOffset;
int xRemaining = rectWidth;
while(xRemaining > 0) {
if(xRemaining > rightShift) {
binaryDataArray[b++] =
(byte)(((data[i++]&0xFF) << leftShift) |
((data[i]&0xFF) >>> rightShift));
} else {
binaryDataArray[b++] =
(byte)((data[i]&0xFF) << leftShift);
}
xRemaining -= 8;
}
eltOffset += lineStride;
}
}
} else if(dataBuffer instanceof DataBufferShort ||
dataBuffer instanceof DataBufferUShort) {
short[] data = dataBuffer instanceof DataBufferShort ?
((DataBufferShort)dataBuffer).getData() :
((DataBufferUShort)dataBuffer).getData();
for(int y = 0; y < rectHeight; y++) {
int bOffset = bitOffset;
for(int x = 0; x < rectWidth; x += 8, bOffset += 8) {
int i = eltOffset + bOffset/16;
int mod = bOffset % 16;
int left = data[i] & 0xFFFF;
if(mod <= 8) {
binaryDataArray[b++] = (byte)(left >>> (8 - mod));
} else {
int delta = mod - 8;
int right = data[i+1] & 0xFFFF;
binaryDataArray[b++] =
(byte)((left << delta) |
(right >>> (16 - delta)));
}
}
eltOffset += lineStride;
}
} else if(dataBuffer instanceof DataBufferInt) {
int[] data = ((DataBufferInt)dataBuffer).getData();
for(int y = 0; y < rectHeight; y++) {
int bOffset = bitOffset;
for(int x = 0; x < rectWidth; x += 8, bOffset += 8) {
int i = eltOffset + bOffset/32;
int mod = bOffset % 32;
int left = data[i];
if(mod <= 24) {
binaryDataArray[b++] =
(byte)(left >>> (24 - mod));
} else {
int delta = mod - 24;
int right = data[i+1];
binaryDataArray[b++] =
(byte)((left << delta) |
(right >>> (32 - delta)));
}
}
eltOffset += lineStride;
}
}
}
return binaryDataArray;
| | public static long | getTileSize(java.awt.image.SampleModel sm)
int elementSize = DataBuffer.getDataTypeSize(sm.getDataType());
if (sm instanceof MultiPixelPackedSampleModel) {
MultiPixelPackedSampleModel mppsm =
(MultiPixelPackedSampleModel)sm;
return (mppsm.getScanlineStride() * mppsm.getHeight() +
(mppsm.getDataBitOffset() + elementSize -1) / elementSize) *
((elementSize + 7) / 8);
} else if (sm instanceof ComponentSampleModel) {
ComponentSampleModel csm = (ComponentSampleModel)sm;
int[] bandOffsets = csm.getBandOffsets();
int maxBandOff = bandOffsets[0];
for (int i=1; i<bandOffsets.length; i++)
maxBandOff = Math.max(maxBandOff, bandOffsets[i]);
long size = 0;
int pixelStride = csm.getPixelStride();
int scanlineStride = csm.getScanlineStride();
if (maxBandOff >= 0)
size += maxBandOff + 1;
if (pixelStride > 0)
size += pixelStride * (sm.getWidth() - 1);
if (scanlineStride > 0)
size += scanlineStride * (sm.getHeight() - 1);
int[] bankIndices = csm.getBankIndices();
maxBandOff = bankIndices[0];
for (int i=1; i<bankIndices.length; i++)
maxBandOff = Math.max(maxBandOff, bankIndices[i]);
return size * (maxBandOff + 1) * ((elementSize + 7) / 8);
} else if (sm instanceof SinglePixelPackedSampleModel) {
SinglePixelPackedSampleModel sppsm =
(SinglePixelPackedSampleModel)sm;
long size = sppsm.getScanlineStride() * (sppsm.getHeight() - 1) +
sppsm.getWidth();
return size * ((elementSize + 7) / 8);
}
return 0;
| | public static byte[] | getUnpackedBinaryData(java.awt.image.Raster raster, java.awt.Rectangle rect)Returns the binary data unpacked into an array of bytes.
The line stride will be the width of the Raster.
SampleModel sm = raster.getSampleModel();
if(!isBinary(sm)) {
throw new IllegalArgumentException(I18N.getString("ImageUtil0"));
}
int rectX = rect.x;
int rectY = rect.y;
int rectWidth = rect.width;
int rectHeight = rect.height;
DataBuffer dataBuffer = raster.getDataBuffer();
int dx = rectX - raster.getSampleModelTranslateX();
int dy = rectY - raster.getSampleModelTranslateY();
MultiPixelPackedSampleModel mpp = (MultiPixelPackedSampleModel)sm;
int lineStride = mpp.getScanlineStride();
int eltOffset = dataBuffer.getOffset() + mpp.getOffset(dx, dy);
int bitOffset = mpp.getBitOffset(dx);
byte[] bdata = new byte[rectWidth*rectHeight];
int maxY = rectY + rectHeight;
int maxX = rectX + rectWidth;
int k = 0;
if(dataBuffer instanceof DataBufferByte) {
byte[] data = ((DataBufferByte)dataBuffer).getData();
for(int y = rectY; y < maxY; y++) {
int bOffset = eltOffset*8 + bitOffset;
for(int x = rectX; x < maxX; x++) {
byte b = data[bOffset/8];
bdata[k++] =
(byte)((b >>> (7 - bOffset & 7)) & 0x0000001);
bOffset++;
}
eltOffset += lineStride;
}
} else if(dataBuffer instanceof DataBufferShort ||
dataBuffer instanceof DataBufferUShort) {
short[] data = dataBuffer instanceof DataBufferShort ?
((DataBufferShort)dataBuffer).getData() :
((DataBufferUShort)dataBuffer).getData();
for(int y = rectY; y < maxY; y++) {
int bOffset = eltOffset*16 + bitOffset;
for(int x = rectX; x < maxX; x++) {
short s = data[bOffset/16];
bdata[k++] =
(byte)((s >>> (15 - bOffset % 16)) &
0x0000001);
bOffset++;
}
eltOffset += lineStride;
}
} else if(dataBuffer instanceof DataBufferInt) {
int[] data = ((DataBufferInt)dataBuffer).getData();
for(int y = rectY; y < maxY; y++) {
int bOffset = eltOffset*32 + bitOffset;
for(int x = rectX; x < maxX; x++) {
int i = data[bOffset/32];
bdata[k++] =
(byte)((i >>> (31 - bOffset % 32)) &
0x0000001);
bOffset++;
}
eltOffset += lineStride;
}
}
return bdata;
| | public static final boolean | imageIsContiguous(java.awt.image.RenderedImage image)Returns whether the image has contiguous data across rows.
SampleModel sm;
if(image instanceof BufferedImage) {
WritableRaster ras = ((BufferedImage)image).getRaster();
sm = ras.getSampleModel();
} else {
sm = image.getSampleModel();
}
if (sm instanceof ComponentSampleModel) {
// Ensure image rows samples are stored contiguously
// in a single bank.
ComponentSampleModel csm = (ComponentSampleModel)sm;
if (csm.getPixelStride() != csm.getNumBands()) {
return false;
}
int[] bandOffsets = csm.getBandOffsets();
for (int i = 0; i < bandOffsets.length; i++) {
if (bandOffsets[i] != i) {
return false;
}
}
int[] bankIndices = csm.getBankIndices();
for (int i = 0; i < bandOffsets.length; i++) {
if (bankIndices[i] != 0) {
return false;
}
}
return true;
}
// Otherwise true if and only if it's a bilevel image with
// a MultiPixelPackedSampleModel, 1 bit per pixel, and 1 bit
// pixel stride.
return ImageUtil.isBinary(sm);
| | public static boolean | isBinary(java.awt.image.SampleModel sm)
return sm instanceof MultiPixelPackedSampleModel &&
((MultiPixelPackedSampleModel)sm).getPixelBitStride() == 1 &&
sm.getNumBands() == 1;
| | public static boolean | isIndicesForGrayscale(byte[] r, byte[] g, byte[] b)Tests whether the color indices represent a gray-scale image.
if (r.length != g.length || r.length != b.length)
return false;
int size = r.length;
if (size != 256)
return false;
for (int i = 0; i < size; i++) {
byte temp = (byte) i;
if (r[i] != temp || g[i] != temp || b[i] != temp)
return false;
}
return true;
| | public static void | setPackedBinaryData(byte[] binaryDataArray, java.awt.image.WritableRaster raster, java.awt.Rectangle rect)Sets the supplied Raster's data from an array
of packed binary data of the form returned by
getPackedBinaryData().
SampleModel sm = raster.getSampleModel();
if(!isBinary(sm)) {
throw new IllegalArgumentException(I18N.getString("ImageUtil0"));
}
int rectX = rect.x;
int rectY = rect.y;
int rectWidth = rect.width;
int rectHeight = rect.height;
DataBuffer dataBuffer = raster.getDataBuffer();
int dx = rectX - raster.getSampleModelTranslateX();
int dy = rectY - raster.getSampleModelTranslateY();
MultiPixelPackedSampleModel mpp = (MultiPixelPackedSampleModel)sm;
int lineStride = mpp.getScanlineStride();
int eltOffset = dataBuffer.getOffset() + mpp.getOffset(dx, dy);
int bitOffset = mpp.getBitOffset(dx);
int b = 0;
if(bitOffset == 0) {
if(dataBuffer instanceof DataBufferByte) {
byte[] data = ((DataBufferByte)dataBuffer).getData();
if(data == binaryDataArray) {
// Optimal case: simply return.
return;
}
int stride = (rectWidth + 7)/8;
int offset = 0;
for(int y = 0; y < rectHeight; y++) {
System.arraycopy(binaryDataArray, offset,
data, eltOffset,
stride);
offset += stride;
eltOffset += lineStride;
}
} else if(dataBuffer instanceof DataBufferShort ||
dataBuffer instanceof DataBufferUShort) {
short[] data = dataBuffer instanceof DataBufferShort ?
((DataBufferShort)dataBuffer).getData() :
((DataBufferUShort)dataBuffer).getData();
for(int y = 0; y < rectHeight; y++) {
int xRemaining = rectWidth;
int i = eltOffset;
while(xRemaining > 8) {
data[i++] =
(short)(((binaryDataArray[b++] & 0xFF) << 8) |
(binaryDataArray[b++] & 0xFF));
xRemaining -= 16;
}
if(xRemaining > 0) {
data[i++] =
(short)((binaryDataArray[b++] & 0xFF) << 8);
}
eltOffset += lineStride;
}
} else if(dataBuffer instanceof DataBufferInt) {
int[] data = ((DataBufferInt)dataBuffer).getData();
for(int y = 0; y < rectHeight; y++) {
int xRemaining = rectWidth;
int i = eltOffset;
while(xRemaining > 24) {
data[i++] =
(int)(((binaryDataArray[b++] & 0xFF) << 24) |
((binaryDataArray[b++] & 0xFF) << 16) |
((binaryDataArray[b++] & 0xFF) << 8) |
(binaryDataArray[b++] & 0xFF));
xRemaining -= 32;
}
int shift = 24;
while(xRemaining > 0) {
data[i] |=
(int)((binaryDataArray[b++] & 0xFF) << shift);
shift -= 8;
xRemaining -= 8;
}
eltOffset += lineStride;
}
}
} else { // bitOffset != 0
int stride = (rectWidth + 7)/8;
int offset = 0;
if(dataBuffer instanceof DataBufferByte) {
byte[] data = ((DataBufferByte)dataBuffer).getData();
if((bitOffset & 7) == 0) {
for(int y = 0; y < rectHeight; y++) {
System.arraycopy(binaryDataArray, offset,
data, eltOffset,
stride);
offset += stride;
eltOffset += lineStride;
}
} else { // bitOffset % 8 != 0
int rightShift = bitOffset & 7;
int leftShift = 8 - rightShift;
int leftShift8 = 8 + leftShift;
int mask = (byte)(255<<leftShift);
int mask1 = (byte)~mask;
for(int y = 0; y < rectHeight; y++) {
int i = eltOffset;
int xRemaining = rectWidth;
while(xRemaining > 0) {
byte datum = binaryDataArray[b++];
if (xRemaining > leftShift8) {
// when all the bits in this BYTE will be set
// into the data buffer.
data[i] = (byte)((data[i] & mask ) |
((datum&0xFF) >>> rightShift));
data[++i] = (byte)((datum & 0xFF) << leftShift);
} else if (xRemaining > leftShift) {
// All the "leftShift" high bits will be set
// into the data buffer. But not all the
// "rightShift" low bits will be set.
data[i] = (byte)((data[i] & mask ) |
((datum&0xFF) >>> rightShift));
i++;
data[i] =
(byte)((data[i] & mask1) | ((datum & 0xFF) << leftShift));
}
else {
// Less than "leftShift" high bits will be set.
int remainMask = (1 << leftShift - xRemaining) - 1;
data[i] =
(byte)((data[i] & (mask | remainMask)) |
(datum&0xFF) >>> rightShift & ~remainMask);
}
xRemaining -= 8;
}
eltOffset += lineStride;
}
}
} else if(dataBuffer instanceof DataBufferShort ||
dataBuffer instanceof DataBufferUShort) {
short[] data = dataBuffer instanceof DataBufferShort ?
((DataBufferShort)dataBuffer).getData() :
((DataBufferUShort)dataBuffer).getData();
int rightShift = bitOffset & 7;
int leftShift = 8 - rightShift;
int leftShift16 = 16 + leftShift;
int mask = (short)(~(255 << leftShift));
int mask1 = (short)(65535 << leftShift);
int mask2 = (short)~mask1;
for(int y = 0; y < rectHeight; y++) {
int bOffset = bitOffset;
int xRemaining = rectWidth;
for(int x = 0; x < rectWidth;
x += 8, bOffset += 8, xRemaining -= 8) {
int i = eltOffset + (bOffset >> 4);
int mod = bOffset & 15;
int datum = binaryDataArray[b++] & 0xFF;
if(mod <= 8) {
// This BYTE is set into one SHORT
if (xRemaining < 8) {
// Mask the bits to be set.
datum &= 255 << 8 - xRemaining;
}
data[i] = (short)((data[i] & mask) | (datum << leftShift));
} else if (xRemaining > leftShift16) {
// This BYTE will be set into two SHORTs
data[i] = (short)((data[i] & mask1) | ((datum >>> rightShift)&0xFFFF));
data[++i] =
(short)((datum << leftShift)&0xFFFF);
} else if (xRemaining > leftShift) {
// This BYTE will be set into two SHORTs;
// But not all the low bits will be set into SHORT
data[i] = (short)((data[i] & mask1) | ((datum >>> rightShift)&0xFFFF));
i++;
data[i] =
(short)((data[i] & mask2) | ((datum << leftShift)&0xFFFF));
} else {
// Only some of the high bits will be set into
// SHORTs
int remainMask = (1 << leftShift - xRemaining) - 1;
data[i] = (short)((data[i] & (mask1 | remainMask)) |
((datum >>> rightShift)&0xFFFF & ~remainMask));
}
}
eltOffset += lineStride;
}
} else if(dataBuffer instanceof DataBufferInt) {
int[] data = ((DataBufferInt)dataBuffer).getData();
int rightShift = bitOffset & 7;
int leftShift = 8 - rightShift;
int leftShift32 = 32 + leftShift;
int mask = 0xFFFFFFFF << leftShift;
int mask1 = ~mask;
for(int y = 0; y < rectHeight; y++) {
int bOffset = bitOffset;
int xRemaining = rectWidth;
for(int x = 0; x < rectWidth;
x += 8, bOffset += 8, xRemaining -= 8) {
int i = eltOffset + (bOffset >> 5);
int mod = bOffset & 31;
int datum = binaryDataArray[b++] & 0xFF;
if(mod <= 24) {
// This BYTE is set into one INT
int shift = 24 - mod;
if (xRemaining < 8) {
// Mask the bits to be set.
datum &= 255 << 8 - xRemaining;
}
data[i] = (data[i] & (~(255 << shift))) | (datum << shift);
} else if (xRemaining > leftShift32) {
// All the bits of this BYTE will be set into two INTs
data[i] = (data[i] & mask) | (datum >>> rightShift);
data[++i] = datum << leftShift;
} else if (xRemaining > leftShift) {
// This BYTE will be set into two INTs;
// But not all the low bits will be set into INT
data[i] = (data[i] & mask) | (datum >>> rightShift);
i++;
data[i] = (data[i] & mask1) | (datum << leftShift);
} else {
// Only some of the high bits will be set into INT
int remainMask = (1 << leftShift - xRemaining) - 1;
data[i] = (data[i] & (mask | remainMask)) |
(datum >>> rightShift & ~remainMask);
}
}
eltOffset += lineStride;
}
}
}
| | public static void | setUnpackedBinaryData(byte[] bdata, java.awt.image.WritableRaster raster, java.awt.Rectangle rect)Copies data into the packed array of the Raster
from an array of unpacked data of the form returned by
getUnpackedBinaryData().
If the data are binary, then the target bit will be set if
and only if the corresponding byte is non-zero.
SampleModel sm = raster.getSampleModel();
if(!isBinary(sm)) {
throw new IllegalArgumentException(I18N.getString("ImageUtil0"));
}
int rectX = rect.x;
int rectY = rect.y;
int rectWidth = rect.width;
int rectHeight = rect.height;
DataBuffer dataBuffer = raster.getDataBuffer();
int dx = rectX - raster.getSampleModelTranslateX();
int dy = rectY - raster.getSampleModelTranslateY();
MultiPixelPackedSampleModel mpp = (MultiPixelPackedSampleModel)sm;
int lineStride = mpp.getScanlineStride();
int eltOffset = dataBuffer.getOffset() + mpp.getOffset(dx, dy);
int bitOffset = mpp.getBitOffset(dx);
int k = 0;
if(dataBuffer instanceof DataBufferByte) {
byte[] data = ((DataBufferByte)dataBuffer).getData();
for(int y = 0; y < rectHeight; y++) {
int bOffset = eltOffset*8 + bitOffset;
for(int x = 0; x < rectWidth; x++) {
if(bdata[k++] != (byte)0) {
data[bOffset/8] |=
(byte)(0x00000001 << (7 - bOffset & 7));
}
bOffset++;
}
eltOffset += lineStride;
}
} else if(dataBuffer instanceof DataBufferShort ||
dataBuffer instanceof DataBufferUShort) {
short[] data = dataBuffer instanceof DataBufferShort ?
((DataBufferShort)dataBuffer).getData() :
((DataBufferUShort)dataBuffer).getData();
for(int y = 0; y < rectHeight; y++) {
int bOffset = eltOffset*16 + bitOffset;
for(int x = 0; x < rectWidth; x++) {
if(bdata[k++] != (byte)0) {
data[bOffset/16] |=
(short)(0x00000001 <<
(15 - bOffset % 16));
}
bOffset++;
}
eltOffset += lineStride;
}
} else if(dataBuffer instanceof DataBufferInt) {
int[] data = ((DataBufferInt)dataBuffer).getData();
for(int y = 0; y < rectHeight; y++) {
int bOffset = eltOffset*32 + bitOffset;
for(int x = 0; x < rectWidth; x++) {
if(bdata[k++] != (byte)0) {
data[bOffset/32] |=
(int)(0x00000001 <<
(31 - bOffset % 32));
}
bOffset++;
}
eltOffset += lineStride;
}
}
|
|
