public SampleModel getSampleModel() {
if (sampleModel != null) return sampleModel;
int realWidth = (int) Math.min(tileWidth, width);
int realHeight = (int) Math.min(tileHeight, height);
if (nComp == 1 && (maxDepth == 1 || maxDepth == 2 || maxDepth == 4))
sampleModel =
new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE, realWidth, realHeight, maxDepth);
else if (maxDepth <= 8)
sampleModel =
new PixelInterleavedSampleModel(
DataBuffer.TYPE_BYTE, realWidth, realHeight, nComp, realWidth * nComp, bandOffsets);
else if (maxDepth <= 16)
sampleModel =
new PixelInterleavedSampleModel(
isSigned ? DataBuffer.TYPE_SHORT : DataBuffer.TYPE_USHORT,
realWidth,
realHeight,
nComp,
realWidth * nComp,
bandOffsets);
else if (maxDepth <= 32)
sampleModel =
new PixelInterleavedSampleModel(
DataBuffer.TYPE_INT, realWidth, realHeight, nComp, realWidth * nComp, bandOffsets);
else throw new IllegalArgumentException(I18N.getString("J2KReadState11") + " " + +maxDepth);
return sampleModel;
}
/** Gets the number of tiles */
public int getNumTiles() {
Rectangle sourceRegion = getSourceRegion();
if (sourceRegion == null) {
if (imgsrc != null)
sourceRegion =
new Rectangle(
imgsrc.getMinX(), imgsrc.getMinY(), imgsrc.getWidth(), imgsrc.getHeight());
else sourceRegion = raster.getBounds();
} else {
if (imgsrc != null)
sourceRegion =
sourceRegion.intersection(
new Rectangle(
imgsrc.getMinX(), imgsrc.getMinY(), imgsrc.getWidth(), imgsrc.getHeight()));
else sourceRegion = sourceRegion.intersection(raster.getBounds());
}
int scaleX = getSourceXSubsampling();
int scaleY = getSourceYSubsampling();
int xOffset = getSubsamplingXOffset();
int yOffset = getSubsamplingYOffset();
int w = (sourceRegion.width - xOffset + scaleX - 1) / scaleX;
int h = (sourceRegion.height - yOffset + scaleY - 1) / scaleY;
minX = (sourceRegion.x + xOffset) / scaleX;
minY = (sourceRegion.y + yOffset) / scaleY;
numTiles =
(int)
((Math.floor((minX + w + tileWidth - 1.0) / tileWidth)
- Math.floor((double) minX / tileWidth))
* (Math.floor((minY + h + tileHeight - 1.0) / tileHeight)
- Math.floor((double) minY / tileHeight)));
tileGridXOffset += (minX - tileGridXOffset) / tileWidth * tileWidth;
tileGridYOffset += (minY - tileGridYOffset) / tileHeight * tileHeight;
return numTiles;
}
public Raster getTile(int tileX, int tileY, WritableRaster raster) throws IOException {
Point nT = ictransf.getNumTiles(null);
if (noTransform) {
if (tileX >= nT.x || tileY >= nT.y)
throw new IllegalArgumentException(I18N.getString("J2KImageReader0"));
ictransf.setTile(tileX * tileStepX, tileY * tileStepY);
// The offset of the active tiles is the same for all components,
// since we don't support different component dimensions.
int tOffx;
int tOffy;
int cTileWidth;
int cTileHeight;
if (raster != null && (this.resolution < hd.getDecoderSpecs().dls.getMin())
|| stepX != 1
|| stepY != 1) {
tOffx = raster.getMinX();
tOffy = raster.getMinY();
cTileWidth = Math.min(raster.getWidth(), ictransf.getTileWidth());
cTileHeight = Math.min(raster.getHeight(), ictransf.getTileHeight());
} else {
tOffx =
ictransf.getCompULX(0)
- (ictransf.getImgULX() + ictransf.getCompSubsX(0) - 1) / ictransf.getCompSubsX(0)
+ destinationRegion.x;
tOffy =
ictransf.getCompULY(0)
- (ictransf.getImgULY() + ictransf.getCompSubsY(0) - 1) / ictransf.getCompSubsY(0)
+ destinationRegion.y;
cTileWidth = ictransf.getTileWidth();
cTileHeight = ictransf.getTileHeight();
}
if (raster == null)
raster = Raster.createWritableRaster(sampleModel, new Point(tOffx, tOffy));
int numBands = sampleModel.getNumBands();
if (tOffx + cTileWidth >= destinationRegion.width + destinationRegion.x)
cTileWidth = destinationRegion.width + destinationRegion.x - tOffx;
if (tOffy + cTileHeight >= destinationRegion.height + destinationRegion.y)
cTileHeight = destinationRegion.height + destinationRegion.y - tOffy;
// create the line buffer for pixel data if it is not large enough
// or null
if (pixbuf == null || pixbuf.length < cTileWidth * numBands)
pixbuf = new int[cTileWidth * numBands];
boolean prog = false;
// Deliver in lines to reduce memory usage
for (int l = 0; l < cTileHeight; l++) {
if (reader.getAbortRequest()) break;
// Request line data
for (int i = 0; i < numBands; i++) {
if (reader.getAbortRequest()) break;
DataBlkInt db = dataBlocks[i];
db.ulx = 0;
db.uly = l;
db.w = cTileWidth;
db.h = 1;
ictransf.getInternCompData(db, channelMap[sourceBands[i]]);
prog = prog || db.progressive;
int[] data = db.data;
int k1 = db.offset + cTileWidth - 1;
int fracBit = fracBits[i];
int lS = levelShift[i];
int min = minValues[i];
int max = maxValues[i];
if (ImageUtil.isBinary(sampleModel)) {
// Force min max to 0 and 1.
min = 0;
max = 1;
if (bytebuf == null || bytebuf.length < cTileWidth * numBands)
bytebuf = new byte[cTileWidth * numBands];
for (int j = cTileWidth - 1; j >= 0; j--) {
int tmp = (data[k1--] >> fracBit) + lS;
bytebuf[j] = (byte) ((tmp < min) ? min : ((tmp > max) ? max : tmp));
}
ImageUtil.setUnpackedBinaryData(
bytebuf, raster, new Rectangle(tOffx, tOffy + l, cTileWidth, 1));
} else {
for (int j = cTileWidth - 1; j >= 0; j--) {
int tmp = (data[k1--] >> fracBit) + lS;
pixbuf[j] = (tmp < min) ? min : ((tmp > max) ? max : tmp);
}
raster.setSamples(tOffx, tOffy + l, cTileWidth, 1, destinationBands[i], pixbuf);
}
}
}
} else {
readSubsampledRaster(raster);
}
return raster;
}
