private void setTileClipping(
QueryParameters queryParameters, long mCurrentRow, long mCurrentCol) {
long numRows = queryParameters.toBlockY - queryParameters.fromBlockY;
long numCols = queryParameters.toBlockX - queryParameters.fromBlockX;
// log.debug(numCols + "/" + numRows + " " + mCurrentCol + " " + mCurrentRow);
xmin = -16;
ymin = -16;
xmax = Tile.SIZE + 16;
ymax = Tile.SIZE + 16;
if (numRows > 0) {
int w = (int) (Tile.SIZE / (numCols + 1));
int h = (int) (Tile.SIZE / (numRows + 1));
if (mCurrentCol > 0) xmin = (int) (mCurrentCol * w);
if (mCurrentCol < numCols) xmax = (int) (mCurrentCol * w + w);
if (mCurrentRow > 0) ymin = (int) (mCurrentRow * h);
if (mCurrentRow < numRows) ymax = (int) (mCurrentRow * h + h);
}
mTileClipper.setRect(xmin, ymin, xmax, ymax);
}
/**
* Processes the given number of ways.
*
* @param queryParameters the parameters of the current query.
* @param mapDataSink the callback which handles the extracted ways.
* @param numberOfWays how many ways should be processed.
* @return true if the ways could be processed successfully, false otherwise.
*/
private boolean processWays(
QueryParameters queryParameters, ITileDataSink mapDataSink, int numberOfWays) {
Tag[] wayTags = mTileSource.fileInfo.wayTags;
MapElement e = mElem;
int numTags = 0;
int wayDataBlocks;
// skip string block
int stringsSize = 0;
stringOffset = 0;
if (mTileSource.experimental) {
stringsSize = mReadBuffer.readUnsignedInt();
stringOffset = mReadBuffer.getBufferPosition();
mReadBuffer.skipBytes(stringsSize);
}
// setTileClipping(queryParameters);
for (int elementCounter = numberOfWays; elementCounter != 0; --elementCounter) {
if (mDebugFile) {
// get and check the way signature
mSignatureWay = mReadBuffer.readUTF8EncodedString(SIGNATURE_LENGTH_WAY);
if (!mSignatureWay.startsWith("---WayStart")) {
log.warn("invalid way signature: " + mSignatureWay);
log.warn(DEBUG_SIGNATURE_BLOCK + mSignatureBlock);
return false;
}
}
if (queryParameters.useTileBitmask) {
elementCounter = mReadBuffer.skipWays(queryParameters.queryTileBitmask, elementCounter);
if (elementCounter == 0) return true;
if (elementCounter < 0) return false;
if (mTileSource.experimental && mReadBuffer.lastTagPosition > 0) {
int pos = mReadBuffer.getBufferPosition();
mReadBuffer.setBufferPosition(mReadBuffer.lastTagPosition);
byte numberOfTags = (byte) (mReadBuffer.readByte() & WAY_NUMBER_OF_TAGS_BITMASK);
if (!mReadBuffer.readTags(e.tags, wayTags, numberOfTags)) return false;
numTags = numberOfTags;
mReadBuffer.setBufferPosition(pos);
}
} else {
int wayDataSize = mReadBuffer.readUnsignedInt();
if (wayDataSize < 0) {
log.warn("invalid way data size: " + wayDataSize);
if (mDebugFile) {
log.warn(DEBUG_SIGNATURE_BLOCK + mSignatureBlock);
}
log.error("BUG way 2");
return false;
}
/* ignore the way tile bitmask (2 bytes) */
mReadBuffer.skipBytes(2);
}
/* get the special byte which encodes multiple flags */
byte specialByte = mReadBuffer.readByte();
/* bit 1-4 represent the layer */
byte layer = (byte) ((specialByte & WAY_LAYER_BITMASK) >>> WAY_LAYER_SHIFT);
/* bit 5-8 represent the number of tag IDs */
byte numberOfTags = (byte) (specialByte & WAY_NUMBER_OF_TAGS_BITMASK);
if (numberOfTags != 0) {
if (!mReadBuffer.readTags(e.tags, wayTags, numberOfTags)) return false;
numTags = numberOfTags;
}
/* get the feature bitmask (1 byte) */
byte featureByte = mReadBuffer.readByte();
/* bit 1-6 enable optional features */
boolean featureWayDoubleDeltaEncoding =
(featureByte & WAY_FEATURE_DOUBLE_DELTA_ENCODING) != 0;
boolean hasName = (featureByte & WAY_FEATURE_NAME) != 0;
boolean hasHouseNr = (featureByte & WAY_FEATURE_HOUSE_NUMBER) != 0;
boolean hasRef = (featureByte & WAY_FEATURE_REF) != 0;
e.tags.numTags = numTags;
if (mTileSource.experimental) {
if (hasName) {
int textPos = mReadBuffer.readUnsignedInt();
String str = mReadBuffer.readUTF8EncodedStringAt(stringOffset + textPos);
e.tags.add(new Tag(Tag.KEY_NAME, str, false));
}
if (hasHouseNr) {
int textPos = mReadBuffer.readUnsignedInt();
String str = mReadBuffer.readUTF8EncodedStringAt(stringOffset + textPos);
e.tags.add(new Tag(Tag.KEY_HOUSE_NUMBER, str, false));
}
if (hasRef) {
int textPos = mReadBuffer.readUnsignedInt();
String str = mReadBuffer.readUTF8EncodedStringAt(stringOffset + textPos);
e.tags.add(new Tag(Tag.KEY_REF, str, false));
}
} else {
if (hasName) {
String str = mReadBuffer.readUTF8EncodedString();
e.tags.add(new Tag(Tag.KEY_NAME, str, false));
}
if (hasHouseNr) {
String str = mReadBuffer.readUTF8EncodedString();
e.tags.add(new Tag(Tag.KEY_HOUSE_NUMBER, str, false));
}
if (hasRef) {
String str = mReadBuffer.readUTF8EncodedString();
e.tags.add(new Tag(Tag.KEY_REF, str, false));
}
}
if ((featureByte & WAY_FEATURE_LABEL_POSITION) != 0)
// labelPosition =
readOptionalLabelPosition();
if ((featureByte & WAY_FEATURE_DATA_BLOCKS_BYTE) != 0) {
wayDataBlocks = mReadBuffer.readUnsignedInt();
if (wayDataBlocks < 1) {
log.warn("invalid number of way data blocks: " + wayDataBlocks);
logDebugSignatures();
return false;
}
} else {
wayDataBlocks = 1;
}
/* some guessing if feature is a line or a polygon */
boolean linearFeature =
e.tags.containsKey("highway")
|| e.tags.containsKey("boundary")
|| e.tags.containsKey("railway");
if (linearFeature) {
Tag areaTag = e.tags.get("area");
if (areaTag != null && areaTag.value == Tag.VALUE_YES) linearFeature = false;
}
for (int wayDataBlock = 0; wayDataBlock < wayDataBlocks; wayDataBlock++) {
e.clear();
if (!processWayDataBlock(e, featureWayDoubleDeltaEncoding, linearFeature)) return false;
/* drop invalid outer ring */
if (e.isPoly() && e.index[0] < 6) {
continue;
}
mTileProjection.project(e);
if (!e.tags.containsKey("building"))
if (!mTileClipper.clip(e)) {
continue;
}
e.simplify(1, true);
e.setLayer(layer);
mapDataSink.process(e);
}
}
return true;
}