Java Code Examples for javax.imageio.stream.ImageInputStream#readBits()
The following examples show how to use
javax.imageio.stream.ImageInputStream#readBits() .
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Example 1
| Source File: GouraudShadingContext.java From sambox with Apache License 2.0 | 6 votes |
|
/**
* Read a vertex from the bit input stream performs interpolations.
*
* @param input bit input stream
* @param maxSrcCoord max value for source coordinate (2^bits-1)
* @param maxSrcColor max value for source color (2^bits-1)
* @param rangeX dest range for X
* @param rangeY dest range for Y
* @param colRangeTab dest range array for colors
* @param matrix the pattern matrix concatenated with that of the parent content stream
* @return a new vertex with the flag and the interpolated values
* @throws IOException if something went wrong
*/
protected Vertex readVertex(ImageInputStream input, long maxSrcCoord, long maxSrcColor,
PDRange rangeX, PDRange rangeY, PDRange[] colRangeTab,
Matrix matrix, AffineTransform xform) throws IOException
{
float[] colorComponentTab = new float[numberOfColorComponents];
long x = input.readBits(bitsPerCoordinate);
long y = input.readBits(bitsPerCoordinate);
float dstX = interpolate(x, maxSrcCoord, rangeX.getMin(), rangeX.getMax());
float dstY = interpolate(y, maxSrcCoord, rangeY.getMin(), rangeY.getMax());
LOG.debug("coord: " + String.format("[%06X,%06X] -> [%f,%f]", x, y, dstX, dstY));
Point2D p = matrix.transformPoint(dstX, dstY);
xform.transform(p, p);
for (int n = 0; n < numberOfColorComponents; ++n)
{
int color = (int) input.readBits(bitsPerColorComponent);
colorComponentTab[n] = interpolate(color, maxSrcColor, colRangeTab[n].getMin(),
colRangeTab[n].getMax());
LOG.debug("color[" + n + "]: " + color + "/" + String.format("%02x", color)
+ "-> color[" + n + "]: " + colorComponentTab[n]);
}
return new Vertex(p, colorComponentTab);
}
Example 2
| Source File: TIFFDecompressor.java From Bytecoder with Apache License 2.0 | 5 votes |
|
/**
* Reformats bit-discontiguous data into the {@code DataBuffer}
* of the supplied {@code WritableRaster}.
*/
private static void reformatDiscontiguousData(byte[] buf,
int[] bitsPerSample,
int stride,
int w,
int h,
WritableRaster raster)
throws IOException {
// Get SampleModel info.
SampleModel sm = raster.getSampleModel();
int numBands = sm.getNumBands();
// Initialize input stream.
ByteArrayInputStream is = new ByteArrayInputStream(buf);
ImageInputStream iis = new MemoryCacheImageInputStream(is);
// Reformat.
long iisPosition = 0L;
int y = raster.getMinY();
for(int j = 0; j < h; j++, y++) {
iis.seek(iisPosition);
int x = raster.getMinX();
for(int i = 0; i < w; i++, x++) {
for(int b = 0; b < numBands; b++) {
long bits = iis.readBits(bitsPerSample[b]);
raster.setSample(x, y, b, (int)bits);
}
}
iisPosition += stride;
}
}
Example 3
| Source File: TIFFDecompressor.java From openjdk-jdk9 with GNU General Public License v2.0 | 5 votes |
|
/**
* Reformats bit-discontiguous data into the {@code DataBuffer}
* of the supplied {@code WritableRaster}.
*/
private static void reformatDiscontiguousData(byte[] buf,
int[] bitsPerSample,
int stride,
int w,
int h,
WritableRaster raster)
throws IOException {
// Get SampleModel info.
SampleModel sm = raster.getSampleModel();
int numBands = sm.getNumBands();
// Initialize input stream.
ByteArrayInputStream is = new ByteArrayInputStream(buf);
ImageInputStream iis = new MemoryCacheImageInputStream(is);
// Reformat.
long iisPosition = 0L;
int y = raster.getMinY();
for(int j = 0; j < h; j++, y++) {
iis.seek(iisPosition);
int x = raster.getMinX();
for(int i = 0; i < w; i++, x++) {
for(int b = 0; b < numBands; b++) {
long bits = iis.readBits(bitsPerSample[b]);
raster.setSample(x, y, b, (int)bits);
}
}
iisPosition += stride;
}
}
Example 4
| Source File: GouraudShadingContext.java From gcs with Mozilla Public License 2.0 | 5 votes |
|
/**
* Read a vertex from the bit input stream performs interpolations.
*
* @param input bit input stream
* @param maxSrcCoord max value for source coordinate (2^bits-1)
* @param maxSrcColor max value for source color (2^bits-1)
* @param rangeX dest range for X
* @param rangeY dest range for Y
* @param colRangeTab dest range array for colors
* @param matrix the pattern matrix concatenated with that of the parent content stream
* @return a new vertex with the flag and the interpolated values
* @throws IOException if something went wrong
*/
protected Vertex readVertex(ImageInputStream input, long maxSrcCoord, long maxSrcColor,
PDRange rangeX, PDRange rangeY, PDRange[] colRangeTab,
Matrix matrix, AffineTransform xform) throws IOException
{
float[] colorComponentTab = new float[numberOfColorComponents];
long x = input.readBits(bitsPerCoordinate);
long y = input.readBits(bitsPerCoordinate);
float dstX = interpolate(x, maxSrcCoord, rangeX.getMin(), rangeX.getMax());
float dstY = interpolate(y, maxSrcCoord, rangeY.getMin(), rangeY.getMax());
LOG.debug("coord: " + String.format("[%06X,%06X] -> [%f,%f]", x, y, dstX, dstY));
Point2D p = matrix.transformPoint(dstX, dstY);
xform.transform(p, p);
for (int n = 0; n < numberOfColorComponents; ++n)
{
int color = (int) input.readBits(bitsPerColorComponent);
colorComponentTab[n] = interpolate(color, maxSrcColor, colRangeTab[n].getMin(),
colRangeTab[n].getMax());
LOG.debug("color[" + n + "]: " + color + "/" + String.format("%02x", color)
+ "-> color[" + n + "]: " + colorComponentTab[n]);
}
// "Each set of vertex data shall occupy a whole number of bytes.
// If the total number of bits required is not divisible by 8, the last data byte
// for each vertex is padded at the end with extra bits, which shall be ignored."
int bitOffset = input.getBitOffset();
if (bitOffset != 0)
{
input.readBits(8 - bitOffset);
}
return new Vertex(p, colorComponentTab);
}
Example 5
| Source File: PDFunctionType0.java From gcs with Mozilla Public License 2.0 | 5 votes |
|
/**
* Get all sample values of this function.
*
* @return an array with all samples.
*/
private int[][] getSamples()
{
if (samples == null)
{
int arraySize = 1;
int nIn = getNumberOfInputParameters();
int nOut = getNumberOfOutputParameters();
COSArray sizes = getSize();
for (int i = 0; i < nIn; i++)
{
arraySize *= sizes.getInt(i);
}
samples = new int[arraySize][nOut];
int bitsPerSample = getBitsPerSample();
int index = 0;
try
{
// PDF spec 1.7 p.171:
// Each sample value is represented as a sequence of BitsPerSample bits.
// Successive values are adjacent in the bit stream; there is no padding at byte boundaries.
ImageInputStream mciis = new MemoryCacheImageInputStream(getPDStream().createInputStream());
for (int i = 0; i < arraySize; i++)
{
for (int k = 0; k < nOut; k++)
{
// TODO will this cast work properly for 32 bitsPerSample or should we use long[]?
samples[index][k] = (int) mciis.readBits(bitsPerSample);
}
index++;
}
mciis.close();
}
catch (IOException exception)
{
LOG.error("IOException while reading the sample values of this function.", exception);
}
}
return samples;
}
Example 6
| Source File: PDFunctionType0.java From sambox with Apache License 2.0 | 5 votes |
|
/**
* Get all sample values of this function.
*
* @return an array with all samples.
*/
private int[][] getSamples()
{
if (samples == null)
{
int arraySize = 1;
int nIn = getNumberOfInputParameters();
int nOut = getNumberOfOutputParameters();
COSArray sizes = getSize();
for (int i = 0; i < nIn; i++)
{
arraySize *= sizes.getInt(i);
}
samples = new int[arraySize][nOut];
int bitsPerSample = getBitsPerSample();
int index = 0;
try
{
// PDF spec 1.7 p.171:
// Each sample value is represented as a sequence of BitsPerSample bits.
// Successive values are adjacent in the bit stream; there is no padding at byte boundaries.
ImageInputStream mciis = new MemoryCacheImageInputStream(getPDStream().createInputStream());
for (int i = 0; i < arraySize; i++)
{
for (int k = 0; k < nOut; k++)
{
// TODO will this cast work properly for 32 bitsPerSample or should we use long[]?
samples[index][k] = (int) mciis.readBits(bitsPerSample);
}
index++;
}
mciis.close();
}
catch (IOException exception)
{
LOG.error("IOException while reading the sample values of this function.", exception);
}
}
return samples;
}
Example 7
| Source File: ReadBitsTest.java From openjdk-jdk9 with GNU General Public License v2.0 | 4 votes |
|
public static void main(String[] args) throws IOException {
byte[] buffer = new byte[] {(byte)169, (byte)85}; // 10101001 01010101
InputStream ins = new ByteArrayInputStream(buffer);
ImageInputStream in = new FileCacheImageInputStream(ins,null);
if (in.getBitOffset() != 0) {
throw new RuntimeException("Initial bit offset != 0!");
}
int bit0 = in.readBit(); // 1
if (bit0 != 1) {
throw new RuntimeException("First bit != 1");
}
if (in.getBitOffset() != 1) {
throw new RuntimeException("Second bit offset != 1");
}
long bits1 = in.readBits(5); // 01010 = 10
if (bits1 != 10) {
throw new RuntimeException("Bits 1-5 != 10 (= " + bits1 + ")");
}
if (in.getBitOffset() != 6) {
throw new RuntimeException("Third bit offset != 6");
}
int bit1 = in.readBit(); // 0
if (bit1 != 0) {
throw new RuntimeException("Bit 6 != 0");
}
if (in.getBitOffset() != 7) {
throw new RuntimeException("Third bit offset != 7");
}
long bits2 = in.readBits(8); // 10101010 = 170
if (bits2 != 170) {
throw new RuntimeException("Bits 7-14 != 170 (= " + bits2 + ")");
}
if (in.getBitOffset() != 7) {
throw new RuntimeException("Fourth bit offset != 7");
}
int bit2 = in.readBit(); // 1
if (bit2 != 1) {
throw new RuntimeException("Bit 15 != 1");
}
if (in.getBitOffset() != 0) {
throw new RuntimeException("Fifth bit offset != 0");
}
in.close();
}
Example 8
| Source File: PatchMeshesShadingContext.java From gcs with Mozilla Public License 2.0 | 4 votes |
|
/**
* Read a single patch from a data stream, a patch contains information of its coordinates and
* color parameters.
*
* @param input the image source data stream
* @param isFree whether this is a free patch
* @param implicitEdge implicit edge when a patch is not free, otherwise it's not used
* @param implicitCornerColor implicit colors when a patch is not free, otherwise it's not used
* @param maxSrcCoord the maximum coordinate value calculated from source data
* @param maxSrcColor the maximum color value calculated from source data
* @param rangeX range for coordinate x
* @param rangeY range for coordinate y
* @param colRange range for color
* @param matrix the pattern matrix concatenated with that of the parent content stream
* @param xform transformation for user to device space
* @param controlPoints number of control points, 12 for type 6 shading and 16 for type 7 shading
* @return a single patch
* @throws IOException when something went wrong
*/
protected Patch readPatch(ImageInputStream input, boolean isFree, Point2D[] implicitEdge,
float[][] implicitCornerColor, long maxSrcCoord, long maxSrcColor,
PDRange rangeX, PDRange rangeY, PDRange[] colRange, Matrix matrix,
AffineTransform xform, int controlPoints) throws IOException
{
float[][] color = new float[4][numberOfColorComponents];
Point2D[] points = new Point2D[controlPoints];
int pStart = 4, cStart = 2;
if (isFree)
{
pStart = 0;
cStart = 0;
}
else
{
points[0] = implicitEdge[0];
points[1] = implicitEdge[1];
points[2] = implicitEdge[2];
points[3] = implicitEdge[3];
for (int i = 0; i < numberOfColorComponents; i++)
{
color[0][i] = implicitCornerColor[0][i];
color[1][i] = implicitCornerColor[1][i];
}
}
try
{
for (int i = pStart; i < controlPoints; i++)
{
long x = input.readBits(bitsPerCoordinate);
long y = input.readBits(bitsPerCoordinate);
float px = interpolate(x, maxSrcCoord, rangeX.getMin(), rangeX.getMax());
float py = interpolate(y, maxSrcCoord, rangeY.getMin(), rangeY.getMax());
Point2D p = matrix.transformPoint(px, py);
xform.transform(p, p);
points[i] = p;
}
for (int i = cStart; i < 4; i++)
{
for (int j = 0; j < numberOfColorComponents; j++)
{
long c = input.readBits(bitsPerColorComponent);
color[i][j] = interpolate(c, maxSrcColor, colRange[j].getMin(),
colRange[j].getMax());
}
}
}
catch (EOFException ex)
{
LOG.debug("EOF");
return null;
}
return generatePatch(points, color);
}
Example 9
| Source File: ReadBitsTest.java From jdk8u_jdk with GNU General Public License v2.0 | 4 votes |
|
public static void main(String[] args) throws IOException {
byte[] buffer = new byte[] {(byte)169, (byte)85}; // 10101001 01010101
InputStream ins = new ByteArrayInputStream(buffer);
ImageInputStream in = new FileCacheImageInputStream(ins,null);
if (in.getBitOffset() != 0) {
throw new RuntimeException("Initial bit offset != 0!");
}
int bit0 = in.readBit(); // 1
if (bit0 != 1) {
throw new RuntimeException("First bit != 1");
}
if (in.getBitOffset() != 1) {
throw new RuntimeException("Second bit offset != 1");
}
long bits1 = in.readBits(5); // 01010 = 10
if (bits1 != 10) {
throw new RuntimeException("Bits 1-5 != 10 (= " + bits1 + ")");
}
if (in.getBitOffset() != 6) {
throw new RuntimeException("Third bit offset != 6");
}
int bit1 = in.readBit(); // 0
if (bit1 != 0) {
throw new RuntimeException("Bit 6 != 0");
}
if (in.getBitOffset() != 7) {
throw new RuntimeException("Third bit offset != 7");
}
long bits2 = in.readBits(8); // 10101010 = 170
if (bits2 != 170) {
throw new RuntimeException("Bits 7-14 != 170 (= " + bits2 + ")");
}
if (in.getBitOffset() != 7) {
throw new RuntimeException("Fourth bit offset != 7");
}
int bit2 = in.readBit(); // 1
if (bit2 != 1) {
throw new RuntimeException("Bit 15 != 1");
}
if (in.getBitOffset() != 0) {
throw new RuntimeException("Fifth bit offset != 0");
}
in.close();
}
Example 10
| Source File: PatchMeshesShadingContext.java From sambox with Apache License 2.0 | 4 votes |
|
/**
* Read a single patch from a data stream, a patch contains information of its coordinates and
* color parameters.
*
* @param input the image source data stream
* @param isFree whether this is a free patch
* @param implicitEdge implicit edge when a patch is not free, otherwise it's not used
* @param implicitCornerColor implicit colors when a patch is not free, otherwise it's not used
* @param maxSrcCoord the maximum coordinate value calculated from source data
* @param maxSrcColor the maximum color value calculated from source data
* @param rangeX range for coordinate x
* @param rangeY range for coordinate y
* @param colRange range for color
* @param matrix the pattern matrix concatenated with that of the parent content stream
* @param xform transformation for user to device space
* @param controlPoints number of control points, 12 for type 6 shading and 16 for type 7 shading
* @return a single patch
* @throws IOException when something went wrong
*/
protected Patch readPatch(ImageInputStream input, boolean isFree, Point2D[] implicitEdge,
float[][] implicitCornerColor, long maxSrcCoord, long maxSrcColor,
PDRange rangeX, PDRange rangeY, PDRange[] colRange, Matrix matrix,
AffineTransform xform, int controlPoints) throws IOException
{
float[][] color = new float[4][numberOfColorComponents];
Point2D[] points = new Point2D[controlPoints];
int pStart = 4, cStart = 2;
if (isFree)
{
pStart = 0;
cStart = 0;
}
else
{
points[0] = implicitEdge[0];
points[1] = implicitEdge[1];
points[2] = implicitEdge[2];
points[3] = implicitEdge[3];
for (int i = 0; i < numberOfColorComponents; i++)
{
color[0][i] = implicitCornerColor[0][i];
color[1][i] = implicitCornerColor[1][i];
}
}
try
{
for (int i = pStart; i < controlPoints; i++)
{
long x = input.readBits(bitsPerCoordinate);
long y = input.readBits(bitsPerCoordinate);
float px = interpolate(x, maxSrcCoord, rangeX.getMin(), rangeX.getMax());
float py = interpolate(y, maxSrcCoord, rangeY.getMin(), rangeY.getMax());
Point2D p = matrix.transformPoint(px, py);
xform.transform(p, p);
points[i] = p;
}
for (int i = cStart; i < 4; i++)
{
for (int j = 0; j < numberOfColorComponents; j++)
{
long c = input.readBits(bitsPerColorComponent);
color[i][j] = interpolate(c, maxSrcColor, colRange[j].getMin(),
colRange[j].getMax());
}
}
}
catch (EOFException ex)
{
LOG.debug("EOF");
return null;
}
return generatePatch(points, color);
}
