private void readTileData(
File outputFile,
int tileX,
int tileY,
int tileWidth,
int tileHeight,
int jp2TileX,
int jp2TileY,
int jp2TileWidth,
int jp2TileHeight,
short[] tileData,
Rectangle destRect)
throws IOException {
synchronized (this) {
if (!locks.containsKey(outputFile)) {
locks.put(outputFile, new Object());
}
}
final Object lock = locks.get(outputFile);
synchronized (lock) {
Jp2File jp2File = getOpenJ2pFile(outputFile);
int jp2Width = jp2File.width;
int jp2Height = jp2File.height;
if (jp2Width > jp2TileWidth || jp2Height > jp2TileHeight) {
throw new IllegalStateException(
String.format(
"width (=%d) > tileWidth (=%d) || height (=%d) > tileHeight (=%d)",
jp2Width, jp2TileWidth, jp2Height, jp2TileHeight));
}
int jp2X = destRect.x - jp2TileX * jp2TileWidth;
int jp2Y = destRect.y - jp2TileY * jp2TileHeight;
if (jp2X < 0 || jp2Y < 0) {
throw new IllegalStateException(
String.format("jp2X (=%d) < 0 || jp2Y (=%d) < 0", jp2X, jp2Y));
}
final ImageInputStream stream = jp2File.stream;
if (jp2X == 0
&& jp2Width == tileWidth
&& jp2Y == 0
&& jp2Height == tileHeight
&& tileWidth * tileHeight == tileData.length) {
stream.seek(jp2File.dataPos);
stream.readFully(tileData, 0, tileData.length);
} else {
final Rectangle jp2FileRect = new Rectangle(0, 0, jp2Width, jp2Height);
final Rectangle tileRect = new Rectangle(jp2X, jp2Y, tileWidth, tileHeight);
final Rectangle intersection = jp2FileRect.intersection(tileRect);
System.out.printf(
"%s: tile=(%d,%d): jp2FileRect=%s, tileRect=%s, intersection=%s\n",
jp2File.file, tileX, tileY, jp2FileRect, tileRect, intersection);
if (!intersection.isEmpty()) {
long seekPos =
jp2File.dataPos + NUM_SHORT_BYTES * (intersection.y * jp2Width + intersection.x);
int tilePos = 0;
for (int y = 0; y < intersection.height; y++) {
stream.seek(seekPos);
stream.readFully(tileData, tilePos, intersection.width);
seekPos += NUM_SHORT_BYTES * jp2Width;
tilePos += tileWidth;
for (int x = intersection.width; x < tileWidth; x++) {
tileData[y * tileWidth + x] = (short) 0;
}
}
for (int y = intersection.height; y < tileWidth; y++) {
for (int x = 0; x < tileWidth; x++) {
tileData[y * tileWidth + x] = (short) 0;
}
}
} else {
Arrays.fill(tileData, (short) 0);
}
}
}
}
@Override
protected void computeRect(PlanarImage[] sources, WritableRaster dest, Rectangle destRect) {
final DataBufferUShort dataBuffer = (DataBufferUShort) dest.getDataBuffer();
final short[] tileData = dataBuffer.getData();
final int tileWidth = this.getTileWidth();
final int tileHeight = this.getTileHeight();
final int tileX = destRect.x / tileWidth;
final int tileY = destRect.y / tileHeight;
if (tileWidth * tileHeight != tileData.length) {
throw new IllegalStateException(
String.format(
"tileWidth (=%d) * tileHeight (=%d) != tileData.length (=%d)",
tileWidth, tileHeight, tileData.length));
}
final int resolution = getLevel();
final Dimension jp2TileDim = getJp2TileDim(bandInfo, resolution);
final int jp2TileWidth = jp2TileDim.width;
final int jp2TileHeight = jp2TileDim.height;
final int jp2TileX = destRect.x / jp2TileWidth;
final int jp2TileY = destRect.y / jp2TileHeight;
// Res - Img Size - Tile W
// 0 - 10960 - 4096
// 1 - 5480 - 2048
// 2 - 2740 - 1024
// 3 - 1370 - 512
// 4 - 685 - 256
// 5 - 343 - 128
final File outputFile =
new File(
cacheDir,
FileUtils.exchangeExtension(
imageFile.getName(),
String.format("_R%d_TX%d_TY%d.pgx", resolution, jp2TileX, jp2TileY)));
final File outputFile0 = getFirstComponentOutputFile(outputFile);
if (!outputFile0.exists()) {
System.out.printf(
"Jp2ExeImage.readTileData(): recomputing res=%d, tile=(%d,%d)\n",
resolution, jp2TileX, jp2TileY);
try {
decompressTile(outputFile, jp2TileX, jp2TileY);
} catch (IOException e) {
// warn
outputFile0.delete();
}
if (!outputFile0.exists()) {
Arrays.fill(tileData, (short) 0);
return;
}
}
try {
System.out.printf(
"Jp2ExeImage.readTileData(): reading res=%d, tile=(%d,%d)\n",
resolution, jp2TileX, jp2TileY);
readTileData(
outputFile0,
tileX,
tileY,
tileWidth,
tileHeight,
jp2TileX,
jp2TileY,
jp2TileWidth,
jp2TileHeight,
tileData,
destRect);
} catch (IOException e) {
// warn
}
}