Examples of ca.eandb.jmist.framework.loader.openexr.attribute.CompressionMethod

Package ca.eandb.jmist.framework.loader.openexr.attribute

Examples of ca.eandb.jmist.framework.loader.openexr.attribute.CompressionMethod

ca.eandb.jmist.framework.loader.openexr.attribute.CompressionMethod

      source.seek(source.getFlushedPosition() + size);
      source.flush();
    }


    Box2i dw = getDataWindow();
    CompressionMethod cm = getCompressionMethod();


    source.flush();


    if (tiled) {
      TileDescription td = getTiles();
      int numTiles;
      switch (td.getLevelMode()) {
      case ONE_LEVEL:
        numTiles = (1 + (dw.getYSize() - 1) / td.getYSize())
            * (1 + (dw.getXSize() - 1) / td.getXSize());
        break;


      case MIPMAP_LEVELS:
      {
        int w = dw.getXSize();
        int h = dw.getYSize();
        int tw = td.getXSize();
        int th = td.getYSize();
        RoundingMode rm = td.getRoundingMode();
        int n = 1 + round(Math.log(Math.max(w, h)) / Math.log(2.0), rm);
        numTiles = 0;
        for (int i = 0; i < n; i++) {
          int lx = round(w / Math.pow(2.0, i), rm);
          int ly = round(h / Math.pow(2.0, i), rm);
          int tx = 1 + (lx - 1) / tw;
          int ty = 1 + (ly - 1) / th;
          numTiles += tx * ty;
        }
        break;
      }


      case RIPMAP_LEVELS:
      {
        int w = dw.getXSize();
        int h = dw.getYSize();
        int tw = td.getXSize();
        int th = td.getYSize();
        RoundingMode rm = td.getRoundingMode();
        int nx = 1 + round(Math.log(w) / Math.log(2.0), rm);
        int ny = 1 + round(Math.log(h) / Math.log(2.0), rm);
        numTiles = 0;
        for (int j = 0; j < ny; j++) {
          int ly = round(h / Math.pow(2.0, j), rm);
          int ty = 1 + (ly - 1) / th;
          for (int i = 0; i < nx; i++) {
            int lx = round(w / Math.pow(2.0, i), rm);
            int tx = 1 + (lx - 1) / tw;
            numTiles += tx * ty;
          }
        }
        break;
      }


      default:
        throw new UnexpectedException("Invalid level mode.");
      }
      source.seek(source.getFlushedPosition() + 8 * numTiles);
      source.flush();


      throw new UnimplementedException();


    } else { // scan lines
      int w = dw.getXSize();
      int h = dw.getYSize();
      int ymin = dw.getYMin();
      int ymax = dw.getYMax();
      int blockHeight = cm.getScanLinesPerBlock();
      int numBlocks = 1 + (h - 1) / blockHeight;
      ChannelList chlist = getChannelList();


      source.seek(source.getFlushedPosition() + 8 * numBlocks);


      for (int i = 0; i < numBlocks; i++) {
        source.flush();


        int x0 = dw.getXMin();
        int x1 = dw.getXMax();
        int y0 = source.readInt();
        int y1 = Math.min(y0 + blockHeight - 1, ymax);
        Box2i block = new Box2i(x0, y0, x1, y1);
        int size = source.readInt();
        int blockSize = computeTileSize(block);


        IIOByteBuffer buf = new IIOByteBuffer(null, 0, 0);
        source.readBytes(buf, size);
        if (size < blockSize) {
          cm.decompress(buf, block);
          if (buf.getLength() < blockSize) {
            throw new RuntimeException("Undersized block");
          }
        }
        f.write(buf.getData(), buf.getOffset(), buf.getLength());

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      out.seek(attrEnd);
      out.flush();
    }
    out.writeByte(0);


    CompressionMethod cm = getCompressionMethod();
    Box2i dw = getDataWindow();
    int xmin = dw.getXMin();
    int ymin = dw.getYMin();
    int xmax = dw.getXMax();
    int ymax = dw.getYMax();


    int numBlocks = dw.getYSize() / cm.getScanLinesPerBlock();
    long blockPtrPos = out.getStreamPosition();
    long blockPos = blockPtrPos + 8 * numBlocks;


    int maximumBlockSize = computeMaximumTileSize(new V2i(dw.getXSize(),
        Math.min(dw.getYSize(), cm.getScanLinesPerBlock())));
    byte[] blockData = new byte[maximumBlockSize];
    IIOByteBuffer buf = new IIOByteBuffer(null, 0, 0);
    ByteBuffer bytes = ByteBuffer.wrap(blockData).order(ByteOrder.LITTLE_ENDIAN);


    int firstBlock;
    int lastBlock;
    int blockIncr;
    switch (getLineOrder()) {
    case INCREASING_Y:
    case RANDOM_Y:
      firstBlock = 0;
      lastBlock = numBlocks;
      blockIncr = 1;
      break;


    case DECREASING_Y:
      firstBlock = numBlocks - 1;
      lastBlock = -1;
      blockIncr = -1;
      break;


    default:
      throw new UnexpectedException("Invalid line order");
    }


    for (int i = firstBlock; i != lastBlock; i += blockIncr) {
      out.seek(blockPtrPos + 8 * i);
      out.writeLong(blockPos - start);
      out.seek(blockPos);
      bytes.rewind();


      // TODO write the next block here
      int x0 = dw.getXMin();
      int x1 = dw.getXMax();
      int y0 = dw.getYMin() + i * cm.getScanLinesPerBlock();
      int y1 = Math.min(y0 + cm.getScanLinesPerBlock() - 1, dw.getYMax());
      Box2i block = new Box2i(x0, y0, x1, y1);
      int blockSize = computeTileSize(block);


      for (int y = y0; y <= y1; y++) {
        for (Channel channel : chlist.channels()) {
          String name = channel.getName();
          int sx = channel.getxSampling();
          int sy = channel.getySampling();
          if (y % sy == 0) {
            int nx = 1 + (x1 - x0 - (x1 % sx)) / sx;
            int offset = ((y - ymin) / sy) * nx;
            Buffer chBuf = getChannelBuffer(name);
            PixelType pt = channel.getPixelType();


            switch (pt) {
            case UINT:
              bytes.asIntBuffer().put((IntBuffer)
                  ((IntBuffer) chBuf).duplicate().position(offset).limit(offset + nx));
              break;


            case HALF:
              bytes.asShortBuffer().put((ShortBuffer)
                  ((ShortBuffer) chBuf).duplicate().position(offset).limit(offset + nx));
              break;


            case FLOAT:
              bytes.asFloatBuffer().put((FloatBuffer)
                  ((FloatBuffer) chBuf).duplicate().position(offset).limit(offset + nx));
              break;


            default:
              throw new UnexpectedException("Invalid pixel type");
            }


            bytes.position(bytes.position() + nx * pt.getSampleSize());
          }
        }
      }


      buf.setData(blockData);
      buf.setOffset(0);
      buf.setLength(blockSize);
      cm.compress(buf, block);


      out.writeInt(y0);
      if (buf.getLength() < blockSize) {
        out.writeInt(buf.getLength());
        out.write(buf.getData(), buf.getOffset(), buf.getLength());

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