Exemplo n.º 1
0
 short[] readCompressed16bitImage(InputStream in) throws IOException {
   if (IJ.debugMode) IJ.log("ImageReader.read16bit, offset=" + fi.stripOffsets[0]);
   short[] pixels = new short[nPixels];
   int base = 0;
   short last = 0;
   for (int k = 0; k < fi.stripOffsets.length; k++) {
     // IJ.log("seek: "+fi.stripOffsets[k]+" "+fi.stripLengths[k]+"  "+(in instanceof
     // RandomAccessStream));
     if (in instanceof RandomAccessStream) ((RandomAccessStream) in).seek(fi.stripOffsets[k]);
     else if (k > 0) {
       long skip =
           (fi.stripOffsets[k] & 0xffffffffL)
               - (fi.stripOffsets[k - 1] & 0xffffffffL)
               - fi.stripLengths[k - 1];
       if (skip > 0L) in.skip(skip);
     }
     byte[] byteArray = new byte[fi.stripLengths[k]];
     int read = 0, left = byteArray.length;
     while (left > 0) {
       int r = in.read(byteArray, read, left);
       if (r == -1) {
         eofError();
         break;
       }
       read += r;
       left -= r;
     }
     byteArray = uncompress(byteArray);
     int pixelsRead = byteArray.length / bytesPerPixel;
     pixelsRead = pixelsRead - (pixelsRead % fi.width);
     int pmax = base + pixelsRead;
     if (pmax > nPixels) pmax = nPixels;
     if (fi.intelByteOrder) {
       for (int i = base, j = 0; i < pmax; i++, j += 2)
         pixels[i] = (short) (((byteArray[j + 1] & 0xff) << 8) | (byteArray[j] & 0xff));
     } else {
       for (int i = base, j = 0; i < pmax; i++, j += 2)
         pixels[i] = (short) (((byteArray[j] & 0xff) << 8) | (byteArray[j + 1] & 0xff));
     }
     if (fi.compression == FileInfo.LZW_WITH_DIFFERENCING) {
       for (int b = base; b < pmax; b++) {
         pixels[b] += last;
         last = b % fi.width == fi.width - 1 ? 0 : pixels[b];
       }
     }
     base += pixelsRead;
     showProgress(k + 1, fi.stripOffsets.length);
   }
   if (fi.fileType == FileInfo.GRAY16_SIGNED) {
     // convert to unsigned
     for (int i = 0; i < nPixels; i++) pixels[i] = (short) (pixels[i] + 32768);
   }
   return pixels;
 }
Exemplo n.º 2
0
 byte[] readCompressed8bitImage(InputStream in) throws IOException {
   byte[] pixels = new byte[nPixels];
   int current = 0;
   byte last = 0;
   for (int i = 0; i < fi.stripOffsets.length; i++) {
     if (in instanceof RandomAccessStream) ((RandomAccessStream) in).seek(fi.stripOffsets[i]);
     else if (i > 0) {
       long skip =
           (fi.stripOffsets[i] & 0xffffffffL)
               - (fi.stripOffsets[i - 1] & 0xffffffffL)
               - fi.stripLengths[i - 1];
       if (skip > 0L) in.skip(skip);
     }
     byte[] byteArray = new byte[fi.stripLengths[i]];
     int read = 0, left = byteArray.length;
     while (left > 0) {
       int r = in.read(byteArray, read, left);
       if (r == -1) {
         eofError();
         break;
       }
       read += r;
       left -= r;
     }
     byteArray = uncompress(byteArray);
     int length = byteArray.length;
     length = length - (length % fi.width);
     if (fi.compression == FileInfo.LZW_WITH_DIFFERENCING) {
       for (int b = 0; b < length; b++) {
         byteArray[b] += last;
         last = b % fi.width == fi.width - 1 ? 0 : byteArray[b];
       }
     }
     if (current + length > pixels.length) length = pixels.length - current;
     System.arraycopy(byteArray, 0, pixels, current, length);
     current += length;
     showProgress(i + 1, fi.stripOffsets.length);
   }
   return pixels;
 }
Exemplo n.º 3
0
 int[] readCompressedChunkyRGB(InputStream in) throws IOException {
   int[] pixels = new int[nPixels];
   int base = 0;
   int lastRed = 0, lastGreen = 0, lastBlue = 0;
   int nextByte;
   int red = 0, green = 0, blue = 0, alpha = 0;
   boolean bgr = fi.fileType == FileInfo.BGR;
   boolean cmyk = fi.fileType == FileInfo.CMYK;
   boolean differencing = fi.compression == FileInfo.LZW_WITH_DIFFERENCING;
   for (int i = 0; i < fi.stripOffsets.length; i++) {
     if (in instanceof RandomAccessStream) ((RandomAccessStream) in).seek(fi.stripOffsets[i]);
     else if (i > 0) {
       long skip =
           (fi.stripOffsets[i] & 0xffffffffL)
               - (fi.stripOffsets[i - 1] & 0xffffffffL)
               - fi.stripLengths[i - 1];
       if (skip > 0L) in.skip(skip);
     }
     byte[] byteArray = new byte[fi.stripLengths[i]];
     int read = 0, left = byteArray.length;
     while (left > 0) {
       int r = in.read(byteArray, read, left);
       if (r == -1) {
         eofError();
         break;
       }
       read += r;
       left -= r;
     }
     byteArray = uncompress(byteArray);
     if (differencing) {
       for (int b = 0; b < byteArray.length; b++) {
         if (b / bytesPerPixel % fi.width == 0) continue;
         byteArray[b] += byteArray[b - bytesPerPixel];
       }
     }
     int k = 0;
     int pixelsRead = byteArray.length / bytesPerPixel;
     pixelsRead = pixelsRead - (pixelsRead % fi.width);
     int pmax = base + pixelsRead;
     if (pmax > nPixels) pmax = nPixels;
     for (int j = base; j < pmax; j++) {
       if (bytesPerPixel == 4) {
         red = byteArray[k++] & 0xff;
         green = byteArray[k++] & 0xff;
         blue = byteArray[k++] & 0xff;
         alpha = byteArray[k++] & 0xff;
         if (cmyk && alpha > 0) {
           red = ((red * (256 - alpha)) >> 8) + alpha;
           green = ((green * (256 - alpha)) >> 8) + alpha;
           blue = ((blue * (256 - alpha)) >> 8) + alpha;
         }
       } else {
         red = byteArray[k++] & 0xff;
         green = byteArray[k++] & 0xff;
         blue = byteArray[k++] & 0xff;
       }
       if (bgr) pixels[j] = 0xff000000 | (blue << 16) | (green << 8) | red;
       else pixels[j] = 0xff000000 | (red << 16) | (green << 8) | blue;
     }
     base += pixelsRead;
     showProgress(i + 1, fi.stripOffsets.length);
   }
   return pixels;
 }
Exemplo n.º 4
0
 float[] readCompressed32bitImage(InputStream in) throws IOException {
   float[] pixels = new float[nPixels];
   int base = 0;
   float last = 0;
   for (int k = 0; k < fi.stripOffsets.length; k++) {
     // IJ.log("seek: "+fi.stripOffsets[k]+" "+(in instanceof RandomAccessStream));
     if (in instanceof RandomAccessStream) ((RandomAccessStream) in).seek(fi.stripOffsets[k]);
     else if (k > 0) {
       long skip =
           (fi.stripOffsets[k] & 0xffffffffL)
               - (fi.stripOffsets[k - 1] & 0xffffffffL)
               - fi.stripLengths[k - 1];
       if (skip > 0L) in.skip(skip);
     }
     byte[] byteArray = new byte[fi.stripLengths[k]];
     int read = 0, left = byteArray.length;
     while (left > 0) {
       int r = in.read(byteArray, read, left);
       if (r == -1) {
         eofError();
         break;
       }
       read += r;
       left -= r;
     }
     byteArray = uncompress(byteArray);
     int pixelsRead = byteArray.length / bytesPerPixel;
     pixelsRead = pixelsRead - (pixelsRead % fi.width);
     int pmax = base + pixelsRead;
     if (pmax > nPixels) pmax = nPixels;
     int tmp;
     if (fi.intelByteOrder) {
       for (int i = base, j = 0; i < pmax; i++, j += 4) {
         tmp =
             (int)
                 (((byteArray[j + 3] & 0xff) << 24)
                     | ((byteArray[j + 2] & 0xff) << 16)
                     | ((byteArray[j + 1] & 0xff) << 8)
                     | (byteArray[j] & 0xff));
         if (fi.fileType == FileInfo.GRAY32_FLOAT) pixels[i] = Float.intBitsToFloat(tmp);
         else if (fi.fileType == FileInfo.GRAY32_UNSIGNED) pixels[i] = (float) (tmp & 0xffffffffL);
         else pixels[i] = tmp;
       }
     } else {
       for (int i = base, j = 0; i < pmax; i++, j += 4) {
         tmp =
             (int)
                 (((byteArray[j] & 0xff) << 24)
                     | ((byteArray[j + 1] & 0xff) << 16)
                     | ((byteArray[j + 2] & 0xff) << 8)
                     | (byteArray[j + 3] & 0xff));
         if (fi.fileType == FileInfo.GRAY32_FLOAT) pixels[i] = Float.intBitsToFloat(tmp);
         else if (fi.fileType == FileInfo.GRAY32_UNSIGNED) pixels[i] = (float) (tmp & 0xffffffffL);
         else pixels[i] = tmp;
       }
     }
     if (fi.compression == FileInfo.LZW_WITH_DIFFERENCING) {
       for (int b = base; b < pmax; b++) {
         pixels[b] += last;
         last = b % fi.width == fi.width - 1 ? 0 : pixels[b];
       }
     }
     base += pixelsRead;
     showProgress(k + 1, fi.stripOffsets.length);
   }
   return pixels;
 }